SN74AXCH2T45DTMR

Product Folder Order Now Support & Community Tools & Software Technical Documents SN74AXCH2T45 SCES881 – FEBRUARY 2020 SN74AXCH2T45 2-Bit Bus Transceiver with Configurable Level-Shifting and Bus-Hold Inputs 1 Features • 1 • • • • • • • • Fully configurable dual-rail design allows each port to operate with a power supply range from 0.65 V to 3.6 V Operating temperature from –40°C to +125°C Glitch-free power supply sequencing Up to 380 Mbps support when translating from 1.8 V to 3.3 V VCC isolation feature – If either VCC input is below 100 mV, all I/O outputs are disabled and become high impedance Ioff supports partial-power-down mode operation Compatible with AVC family level shifters Latch-up performance exceeds 100 mA per JESD 78, Class II ESD protection exceeds JESD 22 – 8000-V human-body model (HBM) – 1000-V charged-device model (CDM) 2 Applications • • • • • • Enterprise and communications Industrial Personal electronics Wireless infrastructure Building automation Point of sale Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended. If a supply is present for VCCA or VCCB, the bus-hold circuitry always remains active on the A or B inputs respectively, independent of the state of the direction control pin. This device is fully specified for partial-power-down applications using the Ioff current. The Ioff protection circuitry ensures that no excessive current is drawn from or to an input, output, or combined I/O that is biased to a specific voltage while the device is powered down. The VCC isolation feature ensures that if either VCCA or VCCB is less than 100 mV, both I/O ports enter a high-impedance state by disabling their outputs. Glitch-free power supply sequencing allows either supply rail to be powered on or off in any order while providing robust power sequencing performance. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) SN74AXCH2T45DCU VSSOP (8) 2.30 mm × 2.00 mm SN74AXCH2T45DTM X2SON (8) 1.35 mm x 0.80 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Logic Diagram (Positive Logic) VCCA VCCB DIR 3 Description The SN74AXCH2T45 is a two-bit non-inverting bus transceiver that uses two individually configurable power-supply rails. The device is operational with both VCCA and VCCB supplies as low as 0.65 V. The A port is designed to track VCCA, which accepts any supply voltage from 0.65 V to 3.6 V. The B port is designed to track VCCB, which also accepts any supply voltage from 0.65 V to 3.6 V. Additionally the SN74AXCH2T45 is compatible with a single-supply system. The SN74AXCH2T45 device is designed for asynchronous communication between data buses. The device transmits data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level of the direction-control input (DIR). The SN74AXCH2T45 device is designed so the control pin (DIR) is referenced to VCCA. Bus-Hold A1 Bus-Hold B1 Bus-Hold A2 Bus-Hold B2 Note: Bus-hold circuits are only present for data inputs, not control inputs 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. SN74AXCH2T45 SCES881 – FEBRUARY 2020 www.ti.com Table of Contents 1 2 3 4 5 6 Features .................................................................. Applications ........................................................... Description ............................................................. Revision History..................................................... Pin Configuration and Functions ......................... Specifications......................................................... 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 6.10 6.11 6.12 6.13 6.14 7 1 1 1 2 3 4 8 Detailed Description ............................................ 19 8.1 8.2 8.3 8.4 8.5 9 Absolute Maximum Ratings ...................................... 4 ESD Ratings.............................................................. 4 Recommended Operating Conditions....................... 5 Thermal Information .................................................. 5 Electrical Characteristics........................................... 6 Switching Characteristics, VCCA = 0.7 ± 0.05 V ........ 8 Switching Characteristics, VCCA = 0.8 ± 0.045 V ...... 9 Switching Characteristics, VCCA = 0.9 ± 0.04 V ...... 10 Switching Characteristics, VCCA = 1.2 ± 0.1 V ........ 11 Switching Characteristics, VCCA = 1.5 ± 0.1 V ...... 12 Switching Characteristics, VCCA = 1.8 ± 0.15 V .... 13 Switching Characteristics, VCCA = 2.5 ± 0.2 V ...... 14 Switching Characteristics, VCCA = 3.3 ± 0.3 V ...... 15 Operating Characteristics: TA = 25°C ................... 16 Overview ................................................................. Functional Block Diagram ....................................... Feature Description................................................. Bus-Hold Data Inputs .............................................. Device Functional Modes........................................ 19 19 19 21 21 Application and Implementation ........................ 22 9.1 Application Information............................................ 22 9.2 Typical Application ................................................. 22 10 Power Supply Recommendations ..................... 24 11 Layout................................................................... 24 11.1 Layout Guidelines ................................................. 24 11.2 Layout Example .................................................... 24 12 Device and Documentation Support ................. 26 12.1 12.2 12.3 12.4 12.5 12.6 Related Documentation ....................................... Receiving Notification of Documentation Updates Support Resources ............................................... Trademarks ........................................................... Electrostatic Discharge Caution ............................ Glossary ................................................................ 26 26 26 26 26 26 13 Mechanical, Packaging, and Orderable Information ........................................................... 27 Parameter Measurement Information ................ 17 7.1 Load Circuit and Voltage Waveforms ..................... 17 4 Revision History 2 DATE REVISION NOTES February 2020 * Advance Information release. Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated Product Folder Links: SN74AXCH2T45 SN74AXCH2T45 www.ti.com SCES881 – FEBRUARY 2020 5 Pin Configuration and Functions DCU Package 8-Pin VSSOP Top View VCCA 1 8 VCCB A1 2 7 B1 A2 3 6 B2 GND 4 5 DIR DTM Package 8-Pin X2SON Transparent Top View VCCA 1 VCCB 7 B1 6 B2 5 DIR 8 A1 2 4 A2 3 GND Pin Functions PIN NAME NO. DESCRIPTION DCU, DTM VCCA 1 A-port power supply voltage. 0.65 V ≤ VCCA ≤ 3.6 V A1 2 Input/output A1. Referenced to VCCA. A2 3 Input/output A2. Referenced to VCCA. GND 4 Ground DIR 5 Direction Pin for both ports. Referenced to VCCA B2 6 Input/output B2. Referenced to VCCB. B1 7 Input/output B1. Referenced to VCCB. VCCB 8 B-port power supply voltage. 0.65 V ≤ VCCB ≤ 3.6 V Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated Product Folder Links: SN74AXCH2T45 3 SN74AXCH2T45 SCES881 – FEBRUARY 2020 www.ti.com 6 Specifications 6.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) (1) MIN MAX UNIT S VCCA Supply voltage A –0.5 4.2 V VCCB Supply voltage B –0.5 4.2 V I/O Ports (A Port) –0.5 4.2 I/O Ports (B Port) –0.5 4.2 Control Inputs –0.5 4.2 A Port –0.5 4.2 B Port –0.5 4.2 A Port –0.5 VCCA + 0.2 B Port –0.5 VCCB + 0.2 Input Voltage (2) VI VO Voltage applied to any output in the high-impedance or power-off state (2) VO Voltage applied to any output in the high or low state (2) (3) IIK Input clamp current VI < 0 –50 IOK Output clamp current VO < 0 –50 IO Continuous output current Continuous current through VCC or GND Tj Junction Temperature Tstg Storage temperature (1) (2) (3) V V V mA mA –50 50 mA –100 100 mA 150 °C 150 °C –65 Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. The input voltage and output negative-voltage ratings may be exceeded if the input and output current ratings are observed. The output positive-voltage rating may be exceeded up to 4.2 V maximum if the output current rating is observed. 6.2 ESD Ratings VALUE V(ESD) (1) (2) 4 Electrostatic discharge Human body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1) ±8000 Charged device model (CDM), per JEDEC specification JESD22-C101 (2) ±1000 UNIT V JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated Product Folder Links: SN74AXCH2T45 SN74AXCH2T45 www.ti.com SCES881 – FEBRUARY 2020 6.3 Recommended Operating Conditions over operating free-air temperature range (unless otherwise noted) (1) (2) (3) MIN MAX UNIT VCCA Supply voltage A 0.65 3.6 V VCCB Supply voltage B 0.65 3.6 V Data Inputs VCCI = 0.65 V - 0.75 V VCCI x 0.70 VCCI = 0.76 V - 1 V VCCI x 0.70 VCCI = 1.1 V - 1.95 V VCCI x 0.65 VCCI = 2.3 V - 2.7 V VIH 1.6 VCCI = 3 V - 3.6 V High-level input voltage Control Input (DIR), Referenced to VCCA 2 VCCA = 0.65 V - 0.75 V VCCA x 0.70 VCCA = 0.76 V - 1 V VCCA x 0.70 VCCA = 1.1 V - 1.95 V VCCA x 0.65 VCCA = 2.3 V - 2.7 V 1.6 VCCA = 3 V - 3.6 V Data Inputs VIL Low-level input voltage Control Input (DIR), Referenced to VCCA 2 VCCI = 0.65 V - 0.75 V VCCI x 0.30 VCCI = 0.76 V - 1 V VCCI x 0.30 VCCI = 1.1 V - 1.95 V VCCI x 0.35 VCCI = 2.3 V - 2.7 V 0.7 VCCI = 3 V - 3.6 V 0.8 VCCA = 0.65 V - 0.75 V VCCA x 0.30 VCCA = 0.76 V - 1 V VCCA x 0.30 VCCA = 1.1 V - 1.95 V VCCA x 0.35 VCCA = 2.3 V - 2.7 V 0.7 VCCA = 3 V - 3.6 V VI Input voltage 0.8 (3) 0 3.6 Active State 0 VCCO Tri-State 0 3.6 10 ns/V –40 125 °C VO Output voltage Δt/Δv (2) Input transition rise and fall time TA Operating free-air temperature (1) (2) (3) V V V VCCI is the VCC associated with the input port. VCCO is the VCC associated with the output port. All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, SCBA004. 6.4 Thermal Information SN74AXCH2T45 THERMAL METRIC DCU (VSSOP) DTM (X2SON) 8 PINS 8 PINS UNIT RθJA Junction-to-ambient thermal resistance 242.9 225.9 °C/W RθJC(top) Junction-to-case (top) thermal resistance 96.2 131.6 °C/W RθJB Junction-to-board thermal resistance 153.3 141.3 °C/W YJT Junction-to-top characterization parameter 38.2 12.7 °C/W YJB Junction-to-board characterization parameter 152.5 140.9 °C/W Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated Product Folder Links: SN74AXCH2T45 5 SN74AXCH2T45 SCES881 – FEBRUARY 2020 www.ti.com 6.5 Electrical Characteristics over operating free-air temperature range (unless otherwise noted) (1) (2) Operating free-air temperature (TA) PARAMETER TEST CONDITIONS VCCA VCCB -40°C to 85°C MIN High-level output voltage VOH Low-level output voltage VOL Bus-hold low sustaining current (Port A or Port B) IBHL Bus-hold high sustaining current (Port A or Port B) IBHH IBHLO (1) (2) 6 Bus-hold low overdrive current (Port A or Port B) TYP -40°C to 125°C MAX MIN TYP UNIT MAX VCCO – 0.1 VCCO – 0.1 0.65 V 0.55 0.55 0.76 V 0.58 0.58 0.85 V 0.85 V 0.65 0.65 IOH = -3 mA 1.1 V 1.1 V 0.85 0.85 IOH = -6 mA 1.4 V 1.4 V 1.05 1.05 IOH = -8 mA 1.65 V 1.65 V 1.2 1.2 IOH = -9 mA 2.3 V 2.3 V 1.75 1.75 IOH = -12 mA 3V 3V IOL = 100 µA 0.7 V - 3.6 V 0.7 V - 3.6 V 0.1 0.1 IOL = 50 µA 0.65 V 0.65 V 0.1 0.1 IOL = 200 µA 0.76 V 0.76 V 0.18 0.18 IOL = 500 µA 0.85 V 0.85 V 0.2 0.2 IOL = 3 mA 1.1 V 1.1 V 0.25 0.25 IOL = 6 mA 1.4 V 1.4 V 0.35 0.35 IOL = 8 mA 1.65 V 1.65 V 0.45 0.45 IOL = 9 mA 2.3 V 2.3 V 0.55 0.55 IOL = 12 mA 3V 3V 0.7 0.7 VI = 0.20 V 0.65 V 0.65 V 4 4 µA VI = 0.23 V 0.76 V 0.76 V 8 7 µA VI = 0.26 V 0.85 V 0.85 V 10 10 µA VI = 0.39 V 1.1 V 1.1 V 20 20 µA VI = 0.49 V 1.4 V 1.4 V 40 30 µA VI = 0.58 V 1.65 V 1.65 V 55 45 µA VI = 0.7 V 2.3 V 2.3 V VI = 0.8 V 3V 3V VI = 0.20 V 0.65 V VI = 0.23 V VI = VIH VI = VIL IOH = -100 µA 0.7 V - 3.6 V 0.7 V - 3.6 V IOH = -50 µA 0.65 V IOH = -200 µA 0.76 V IOH = -500 µA 2.3 V 2.3 V 90 80 µA 145 135 µA 0.65 V –4 –4 µA 0.76 V 0.76 V –8 –7 µA VI = 0.26 V 0.85 V 0.85 V –10 –10 µA VI = 0.39 V 1.1 V 1.1 V –20 –20 µA VI = 0.49 V 1.4 V 1.4 V –40 –30 µA VI = 0.58 V 1.65 V 1.65 V –55 –45 µA VI = 0.7 V 2.3 V 2.3 V –90 –80 µA VI = 0.8 V 3V 3V –145 –135 µA 0.75 V 0.75 V 40 40 µA 0.84 V 0.84 V 50 50 µA 0.95 V 0.95 V 65 65 µA 1.3 V 1.3 V 105 105 µA 1.6 V 1.6 V 150 150 µA 1.95 V 1.95 V 250 250 µA 2.7 V 2.7 V 410 410 µA 3.6 V 3.6 V 600 600 µA VI = 0 to VCC VCCI is the VCC associated with the input port. VCCO is the VCC associated with the output port. Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated Product Folder Links: SN74AXCH2T45 SN74AXCH2T45 www.ti.com SCES881 – FEBRUARY 2020 Electrical Characteristics (continued) over operating free-air temperature range (unless otherwise noted) (1) (2) Operating free-air temperature (TA) PARAMETER TEST CONDITIONS VCCA VCCB -40°C to 85°C MIN IBHHO II Ioff ICCA ICCB Bus-hold high overdrive current (Port A or Port B) VI = 0 to VCC Control input (DIR):VI = Input leakage VCCA or GND current Data Inputs (Ax, Bx),VI = VCCI or GND Partial power down current VCCA supply current VCCB supply current TYP -40°C to 125°C MAX MIN TYP UNIT MAX 0.75 V 0.75 V –40 –40 µA 0.84 V 0.84 V –50 –50 µA 0.95 V 0.95 V –65 –65 µA 1.3 V 1.3 V –105 –105 µA 1.6 V 1.6 V –150 –150 µA 1.95 V 1.95 V –250 –250 µA 2.7 V 2.7 V –410 –410 µA 3.6 V 3.6 V –600 –600 µA 0.65 V- 3.6 V 0.65 V- 3.6 V –0.5 0.5 –1 1 µA 0.65 V- 3.6 V 0.65 V- 3.6 V –4 4 –8 8 µA A Port: VI or VO = 0 V 3.6 V 0V 0 V - 3.6 V –8 8 –12 12 B Port: VI or VO = 0 V 3.6 V 0 V - 3.6 V 0V –8 8 –12 12 µA 0.65 V- 3.6 V 0.65 V- 3.6 V VI = VCCI or GND IO = 0 VI = VCCI or GND IO = 0 IO = 0 0V 3.6 V 3.6 V 0V 8 –2 14 –12 µA 4 8 0.65 V- 3.6 V 0.65 V- 3.6 V 8 14 0V 3.6 V 4 3.6 V 0V –2 8 µA 23 µA –12 ICCA + ICCB Combined supply current VI = VCCI or GND Ci Control Input (DIR) Capacitance VI = 3.3 V or GND 3.3 V 3.3 V 3.1 3.1 pF Cio Data I/O Capacitance VO = 1.65V DC +1 MHz -16 dBm sine wave 3.3 V 3.3 V 7.2 7.2 pF 0.65 V- 3.6 V 0.65 V- 3.6 V 16 Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated Product Folder Links: SN74AXCH2T45 7 SN74AXCH2T45 SCES881 – FEBRUARY 2020 www.ti.com 6.6 Switching Characteristics, VCCA = 0.7 ± 0.05 V See Figure 1 and Table 1 for test circuit and loading. See Figure 2, Figure 3, and Figure 4 for measurement waveforms. B-Port Supply Voltage (VCCB) PARAMETER FROM A tpd tdis B A DIR A Disable time DIR B A Enable time DIR 8 B Propagation delay DIR ten TO B Test Conditions 0.7 ± 0.05 V 0.8 ± 0.04 V 0.9 ± 0.045 V 1.2 ± 0.1 V 1.5 ± 0.1 V 2.5 ± 0.2 V 3.3 ± 0.3 V MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX -40°C to 85°C 0.5 177 0.5 117 0.5 86 0.5 51 0.5 51 0.5 57 0.5 72 0.5 108 -40°C to 125°C 0.5 177 0.5 117 0.5 86 0.5 51 0.5 51 0.5 57 0.5 72 0.5 108 -40°C to 85°C 0.5 177 0.5 155 0.5 129 0.5 89 0.5 85 0.5 83 0.5 82 0.5 82 -40°C to 125°C 0.5 177 0.5 155 0.5 129 0.5 89 0.5 85 0.5 83 0.5 82 0.5 82 -40°C to 85°C 0.5 147 0.5 147 0.5 147 0.5 147 0.5 147 0.5 147 0.5 147 0.5 147 -40°C to 125°C 0.5 147 0.5 147 0.5 147 0.5 147 0.5 147 0.5 147 0.5 147 0.5 147 -40°C to 85°C 0.5 151 0.5 110 0.5 87 0.5 41 0.5 38 0.5 42 0.5 56 0.5 108 -40°C to 125°C 0.5 151 0.5 110 0.5 87 0.5 41 0.5 38 0.5 42 0.5 56 0.5 108 -40°C to 85°C 0.5 326 0.5 326 0.5 326 0.5 326 0.5 326 0.5 326 0.5 326 0.5 326 -40°C to 125°C 0.5 326 0.5 326 0.5 326 0.5 326 0.5 326 0.5 326 0.5 326 0.5 326 -40°C to 85°C 0.5 320 0.5 257 0.5 223 0.5 194 0.5 190 0.5 192 0.5 200 0.5 233 -40°C to 125°C 0.5 320 0.5 257 0.5 223 0.5 194 0.5 190 0.5 192 0.5 200 0.5 233 Submit Documentation Feedback 1.8 ± 0.15 V UNIT ns ns ns Copyright © 2020, Texas Instruments Incorporated Product Folder Links: SN74AXCH2T45 SN74AXCH2T45 www.ti.com SCES881 – FEBRUARY 2020 6.7 Switching Characteristics, VCCA = 0.8 ± 0.045 V See Figure 1 and Table 1 for test circuit and loading. See Figure 2, Figure 3, and Figure 4 for measurement waveforms. B-Port Supply Voltage (VCCB) PARAMETER FROM A tpd tdis B A DIR A Disable time DIR (1) B A Enable time DIR (1) B Propagation delay DIR ten TO B Test Conditions 0.7 ± 0.05 V 0.8 ± 0.04 V 0.9 ± 0.045 V 1.2 ± 0.1 V 1.5 ± 0.1 V 2.5 ± 0.2 V 3.3 ± 0.3 V MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX 1.8 ± 0.15 V MIN MAX MIN MAX MIN MAX -40°C to 85°C 0.5 155 0.5 96 0.5 64 0.5 34 0.5 28 0.5 27 0.5 29 0.5 34 -40°C to 125°C 0.5 155 0.5 96 0.5 64 0.5 34 0.5 28 0.5 27 0.5 29 0.5 34 -40°C to 85°C 0.5 117 0.5 96 0.5 78 0.5 52 0.5 42 0.5 41 0.5 40 0.5 40 -40°C to 125°C 0.5 117 0.5 96 0.5 78 0.5 52 0.5 42 0.5 41 0.5 40 0.5 40 -40°C to 85°C 0.5 101 0.5 101 0.5 101 0.5 101 0.5 101 0.5 101 0.5 101 0.5 101 -40°C to 125°C 0.5 101 0.5 101 0.5 101 0.5 101 0.5 101 0.5 101 0.5 101 0.5 101 -40°C to 85°C 0.5 143 0.5 103 0.5 79 0.5 33 0.5 27 0.5 26 0.5 28 0.5 35 -40°C to 125°C 0.5 143 0.5 103 0.5 79 0.5 33 0.5 27 0.5 26 0.5 28 0.5 35 -40°C to 85°C 0.5 256 0.5 256 0.5 256 0.5 256 0.5 256 0.5 256 0.5 256 0.5 256 -40°C to 125°C 0.5 256 0.5 256 0.5 256 0.5 256 0.5 256 0.5 256 0.5 256 0.5 256 -40°C to 85°C 0.5 255 0.5 196 0.5 163 0.5 134 0.5 128 0.5 127 0.5 128 0.5 132 -40°C to 125°C 0.5 255 0.5 196 0.5 163 0.5 134 0.5 128 0.5 127 0.5 128 0.5 132 UNIT ns ns ns The enable time is a calculated value, derived using the formula shown in the Enable Times section. Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated Product Folder Links: SN74AXCH2T45 9 SN74AXCH2T45 SCES881 – FEBRUARY 2020 www.ti.com 6.8 Switching Characteristics, VCCA = 0.9 ± 0.04 V See Figure 1 and Table 1 for test circuit and loading. See Figure 2, Figure 3, and Figure 4 for measurement waveforms. B-Port Supply Voltage (VCCB) PARAMETER FROM A tpd tdis B A DIR A Disable time DIR (1) 10 B A Enable time DIR (1) B Propagation delay DIR ten TO B Test Conditions 0.7 ± 0.05 V 0.8 ± 0.04 V 0.9 ± 0.045 V 1.2 ± 0.1 V 1.5 ± 0.1 V 2.5 ± 0.2 V 3.3 ± 0.3 V MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX 1.8 ± 0.15 V MIN MAX MIN MAX MIN MAX -40°C to 85°C 0.5 129 0.5 78 0.5 53 0.5 24 0.5 18 0.5 17 0.5 15 0.5 17 -40°C to 125°C 0.5 129 0.5 78 0.5 53 0.5 24 0.5 18 0.5 17 0.5 15 0.5 17 -40°C to 85°C 0.5 86 0.5 64 0.5 53 0.5 39 0.5 28 0.5 24 0.5 22 0.5 22 -40°C to 125°C 0.5 86 0.5 64 0.5 53 0.5 39 0.5 28 0.5 24 0.5 22 0.5 22 -40°C to 85°C 0.5 75 0.5 75 0.5 75 0.5 75 0.5 75 0.5 75 0.5 75 0.5 75 -40°C to 125°C 0.5 75 0.5 75 0.5 75 0.5 75 0.5 75 0.5 75 0.5 75 0.5 75 -40°C to 85°C 0.5 141 0.5 99 0.5 75 0.5 30 0.5 23 0.5 22 0.5 20 0.5 22 -40°C to 125°C 0.5 141 0.5 99 0.5 75 0.5 31 0.5 24 0.5 22 0.5 20 0.5 23 -40°C to 85°C 0.5 219 0.5 219 0.5 219 0.5 219 0.5 219 0.5 219 0.5 219 0.5 219 -40°C to 125°C 0.5 219 0.5 219 0.5 219 0.5 219 0.5 219 0.5 219 0.5 219 0.5 219 -40°C to 85°C 0.5 202 0.5 152 0.5 125 0.5 97 0.5 92 0.5 90 0.5 89 0.5 90 -40°C to 125°C 0.5 202 0.5 152 0.5 125 0.5 97 0.5 92 0.5 90 0.5 89 0.5 90 UNIT ns ns ns The enable time is a calculated value, derived using the formula shown in the Enable Times section. Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated Product Folder Links: SN74AXCH2T45 SN74AXCH2T45 www.ti.com SCES881 – FEBRUARY 2020 6.9 Switching Characteristics, VCCA = 1.2 ± 0.1 V See Figure 1 and Table 1 for test circuit and loading. See Figure 2, Figure 3, and Figure 4 for measurement waveforms. B-Port Supply Voltage (VCCB) PARAMETER FROM A tpd tdis B A DIR A Disable time DIR (1) B A Enable time DIR (1) B Propagation delay DIR ten TO B Test Conditions 0.7 ± 0.05 V 0.8 ± 0.04 V 0.9 ± 0.045 V 1.2 ± 0.1 V 1.5 ± 0.1 V 2.5 ± 0.2 V 3.3 ± 0.3 V MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX 1.8 ± 0.15 V MIN MAX MIN MAX MIN MAX UNIT -40°C to 85°C 0.5 89 0.5 52 0.5 39 0.5 15 0.5 11 0.5 9 0.5 8 0.5 8 -40°C to 125°C 0.5 89 0.5 52 0.5 39 0.5 15 0.5 11 0.5 10 0.5 8 0.5 8 -40°C to 85°C 0.5 51 0.5 34 0.5 24 0.5 15 0.5 12 0.5 10 0.5 8 0.5 8 -40°C to 125°C 0.5 51 0.5 34 0.5 24 0.5 15 0.5 12 0.5 10 0.5 8 0.5 8 -40°C to 85°C 0.5 26 0.5 26 0.5 26 0.5 26 0.5 26 0.5 26 0.5 26 0.5 26 -40°C to 125°C 0.5 27 0.5 27 0.5 27 0.5 27 0.5 27 0.5 27 0.5 27 0.5 27 -40°C to 85°C 0.5 136 0.5 95 0.5 71 0.5 27 0.5 20 0.5 18 0.5 15 0.5 15 -40°C to 125°C 0.5 136 0.5 95 0.5 72 0.5 28 0.5 21 0.5 19 0.5 16 0.5 16 -40°C to 85°C 0.5 185 0.5 185 0.5 185 0.5 185 0.5 185 0.5 185 0.5 185 0.5 185 -40°C to 125°C 0.5 185 0.5 185 0.5 185 0.5 185 0.5 185 0.5 185 0.5 185 0.5 185 -40°C to 85°C 0.5 111 0.5 73 0.5 60 0.5 40 0.5 38 0.5 35 0.5 35 0.5 35 -40°C to 125°C 0.5 111 0.5 73 0.5 60 0.5 41 0.5 38 0.5 36 0.5 35 0.5 35 ns ns ns The enable time is a calculated value, derived using the formula shown in the Enable Times section. Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated Product Folder Links: SN74AXCH2T45 11 SN74AXCH2T45 SCES881 – FEBRUARY 2020 www.ti.com 6.10 Switching Characteristics, VCCA = 1.5 ± 0.1 V See Figure 1 and Table 1 for test circuit and loading. See Figure 2, Figure 3, and Figure 4 for measurement waveforms. B-Port Supply Voltage (VCCB) PARAMETER FROM A tpd tdis B A DIR A Disable time DIR (1) 12 B A Enable time DIR (1) B Propagation delay DIR ten TO B Test Conditions 0.7 ± 0.05 V 0.8 ± 0.04 V 0.9 ± 0.045 V 1.2 ± 0.1 V 1.5 ± 0.1 V 2.5 ± 0.2 V 3.3 ± 0.3 V MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX 1.8 ± 0.15 V MIN MAX MIN MAX MIN MAX UNIT -40°C to 85°C 0.5 85 0.5 42 0.5 28 0.5 12 0.5 9 0.5 8 0.5 6 0.5 6 -40°C to 125°C 0.5 85 0.5 42 0.5 28 0.5 12 0.5 9 0.5 8 0.5 6 0.5 6 -40°C to 85°C 0.5 51 0.5 28 0.5 18 0.5 11 0.5 9 0.5 8 0.5 6 0.5 5 -40°C to 125°C 0.5 51 0.5 28 0.5 18 0.5 11 0.5 9 0.5 8 0.5 6 0.5 5 -40°C to 85°C 0.5 18 0.5 18 0.5 18 0.5 18 0.5 18 0.5 18 0.5 18 0.5 18 -40°C to 125°C 0.5 19 0.5 19 0.5 19 0.5 19 0.5 19 0.5 19 0.5 19 0.5 19 -40°C to 85°C 0.5 135 0.5 94 0.5 70 0.5 26 0.5 19 0.5 17 0.5 13 0.5 13 -40°C to 125°C 0.5 135 0.5 94 0.5 71 0.5 27 0.5 20 0.5 18 0.5 14 0.5 14 -40°C to 85°C 0.5 180 0.5 180 0.5 180 0.5 180 0.5 180 0.5 180 0.5 180 0.5 180 -40°C to 125°C 0.5 180 0.5 180 0.5 180 0.5 180 0.5 180 0.5 180 0.5 180 0.5 180 -40°C to 85°C 0.5 98 0.5 55 0.5 42 0.5 30 0.5 27 0.5 26 0.5 24 0.5 23 -40°C to 125°C 0.5 98 0.5 55 0.5 42 0.5 31 0.5 28 0.5 27 0.5 25 0.5 25 ns ns ns The enable time is a calculated value, derived using the formula shown in the Enable Times section. Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated Product Folder Links: SN74AXCH2T45 SN74AXCH2T45 www.ti.com SCES881 – FEBRUARY 2020 6.11 Switching Characteristics, VCCA = 1.8 ± 0.15 V See Figure 1 and Table 1 for test circuit and loading. See Figure 2, Figure 3, and Figure 4 for measurement waveforms. B-Port Supply Voltage (VCCB) PARAMETER FROM A tpd tdis B A DIR A Disable time DIR (1) B A Enable time DIR (1) B Propagation delay DIR ten TO B Test Conditions 0.7 ± 0.05 V 0.8 ± 0.04 V 0.9 ± 0.045 V 1.2 ± 0.1 V 1.5 ± 0.1 V 2.5 ± 0.2 V 3.3 ± 0.3 V MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX 1.8 ± 0.15 V MIN MAX MIN MAX MIN MAX UNIT -40°C to 85°C 0.5 84 0.5 41 0.5 24 0.5 10 0.5 8 0.5 7 0.5 6 0.5 5 -40°C to 125°C 0.5 84 0.5 41 0.5 24 0.5 10 0.5 8 0.5 7 0.5 6 0.5 5 -40°C to 85°C 0.5 56 0.5 27 0.5 16 0.5 9 0.5 8 0.5 7 0.5 5 0.5 5 -40°C to 125°C 0.5 56 0.5 27 0.5 16 0.5 10 0.5 8 0.5 7 0.5 6 0.5 5 -40°C to 85°C 0.5 16 0.5 16 0.5 16 0.5 16 0.5 16 0.5 16 0.5 16 0.5 16 -40°C to 125°C 0.5 17 0.5 17 0.5 17 0.5 17 0.5 17 0.5 17 0.5 17 0.5 17 -40°C to 85°C 0.5 134 0.5 93 0.5 70 0.5 25 0.5 18 0.5 16 0.5 12 0.5 12 -40°C to 125°C 0.5 134 0.5 93 0.5 71 0.5 26 0.5 19 0.5 17 0.5 13 0.5 13 -40°C to 85°C 0.5 180 0.5 178 0.5 178 0.5 178 0.5 178 0.5 178 0.5 178 0.5 178 -40°C to 125°C 0.5 180 0.5 178 0.5 178 0.5 178 0.5 178 0.5 178 0.5 178 0.5 178 -40°C to 85°C 0.5 94 0.5 52 0.5 36 0.5 26 0.5 23 0.5 22 0.5 21 0.5 20 -40°C to 125°C 0.5 94 0.5 52 0.5 36 0.5 27 0.5 24 0.5 23 0.5 22 0.5 22 ns ns ns The enable time is a calculated value, derived using the formula shown in the Enable Times section. Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated Product Folder Links: SN74AXCH2T45 13 SN74AXCH2T45 SCES881 – FEBRUARY 2020 www.ti.com 6.12 Switching Characteristics, VCCA = 2.5 ± 0.2 V See Figure 1 and Table 1 for test circuit and loading. See Figure 2, Figure 3, and Figure 4 for measurement waveforms. B-Port Supply Voltage (VCCB) PARAMETER FROM A tpd tdis B A DIR A Disable time DIR (1) 14 B A Enable time DIR (1) B Propagation delay DIR ten TO B Test Conditions 0.7 ± 0.05 V 0.8 ± 0.04 V 0.9 ± 0.045 V 1.2 ± 0.1 V 1.5 ± 0.1 V 2.5 ± 0.2 V 3.3 ± 0.3 V MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX 1.8 ± 0.15 V MIN MAX MIN MAX MIN MAX UNIT -40°C to 85°C 0.5 82 0.5 40 0.5 22 0.5 8 0.5 6 0.5 5 0.5 5 0.5 5 -40°C to 125°C 0.5 82 0.5 40 0.5 22 0.5 8 0.5 6 0.5 6 0.5 5 0.5 5 -40°C to 85°C 0.5 72 0.5 29 0.5 15 0.5 8 0.5 6 0.5 6 0.5 5 0.5 4 -40°C to 125°C 0.5 72 0.5 29 0.5 15 0.5 8 0.5 6 0.5 6 0.5 5 0.5 4 -40°C to 85°C 0.5 11 0.5 11 0.5 11 0.5 11 0.5 11 0.5 11 0.5 11 0.5 11 -40°C to 125°C 0.5 12 0.5 12 0.5 12 0.5 12 0.5 12 0.5 12 0.5 12 0.5 12 -40°C to 85°C 0.5 135 0.5 93 0.5 70 0.5 25 0.5 18 0.5 15 0.5 12 0.5 11 -40°C to 125°C 0.5 135 0.5 93 0.5 70 0.5 26 0.5 19 0.5 16 0.5 13 0.5 12 -40°C to 85°C 0.5 188 0.5 183 0.5 183 0.5 183 0.5 183 0.5 183 0.5 183 0.5 183 -40°C to 125°C 0.5 188 0.5 183 0.5 183 0.5 183 0.5 183 0.5 183 0.5 183 0.5 183 -40°C to 85°C 0.5 90 0.5 47 0.5 29 0.5 18 0.5 17 0.5 16 0.5 16 0.5 15 -40°C to 125°C 0.5 90 0.5 47 0.5 29 0.5 19 0.5 18 0.5 17 0.5 17 0.5 16 ns ns ns The enable time is a calculated value, derived using the formula shown in the Enable Times section. Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated Product Folder Links: SN74AXCH2T45 SN74AXCH2T45 www.ti.com SCES881 – FEBRUARY 2020 6.13 Switching Characteristics, VCCA = 3.3 ± 0.3 V See Figure 1 and Table 1 for test circuit and loading. See Figure 2, Figure 3, and Figure 4 for measurement waveforms. B-Port Supply Voltage (VCCB) PARAMETER FROM A tpd tdis B A DIR A Disable time DIR (1) B A Enable time DIR (1) B Propagation delay DIR ten TO B Test Condtions 0.7 ± 0.05 V 0.8 ± 0.04 V 0.9 ± 0.045 V 1.2 ± 0.1 V 1.5 ± 0.1 V 2.5 ± 0.2 V 3.3 ± 0.3 V MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX 1.8 ± 0.15 V MIN MAX MIN MAX MIN MAX UNIT -40°C to 85°C 0.5 82 0.5 40 0.5 22 0.5 8 0.5 5 0.5 5 0.5 4 0.5 4 -40°C to 125°C 0.5 82 0.5 40 0.5 22 0.5 8 0.5 5 0.5 5 0.5 4 0.5 4 -40°C to 85°C 0.5 106 0.5 34 0.5 17 0.5 8 0.5 6 0.5 5 0.5 5 0.5 4 -40°C to 125°C 0.5 106 0.5 34 0.5 17 0.5 8 0.5 6 0.5 5 0.5 5 0.5 4 -40°C to 85°C 0.5 10 0.5 10 0.5 10 0.5 10 0.5 10 0.5 10 0.5 10 0.5 10 -40°C to 125°C 0.5 11 0.5 11 0.5 11 0.5 11 0.5 11 0.5 11 0.5 11 0.5 11 -40°C to 85°C 0.5 135 0.5 93 0.5 70 0.5 25 0.5 17 0.5 15 0.5 11 0.5 11 -40°C to 125°C 0.5 135 0.5 93 0.5 70 0.5 26 0.5 19 0.5 16 0.5 12 0.5 11 -40°C to 85°C 0.5 222 0.5 222 0.5 222 0.5 222 0.5 222 0.5 222 0.5 222 0.5 222 -40°C to 125°C 0.5 222 0.5 222 0.5 222 0.5 222 0.5 222 0.5 222 0.5 222 0.5 222 -40°C to 85°C 0.5 90 0.5 46 0.5 28 0.5 17 0.5 15 0.5 15 0.5 14 0.5 14 -40°C to 125°C 0.5 90 0.5 46 0.5 28 0.5 18 0.5 16 0.5 16 0.5 15 0.5 15 ns ns ns The enable time is a calculated value, derived using the formula shown in the Enable Times section. Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated Product Folder Links: SN74AXCH2T45 15 SN74AXCH2T45 SCES881 – FEBRUARY 2020 www.ti.com 6.14 Operating Characteristics: TA = 25°C PARAMETER Power Dissipation Capacitance per transceiver (A to B) TEST CONDITIONS CL = 0, RL = Open f = 1 MHz, tr = tf = 1 ns CpdA Power Dissipation Capacitance per transceiver (B to A) Power Dissipation Capacitance per transceiver (A to B) CL = 0, RL = Open f = 1 MHz, tr = tf = 1 ns CL = 0, RL = Open f = 1 MHz, tr = tf = 1 ns CpdB Power Dissipation Capacitance per transceiver (B to A) 16 CL = 0, RL = Open f = 1 MHz, tr = tf = 1 ns VCCA VCCB MIN TYP 0.7 V 0.7 V 2.3 0.8 V 0.8 V 2.1 0.9 V 0.9 V 2.1 1.2 V 1.2 V 2 1.5 V 1.5 V 2 1.8 V 1.8 V 2.1 2.5 V 2.5 V 2.7 3.3 V 3.3 V 3.4 0.7 V 0.7 V 11.2 0.8 V 0.8 V 11.1 0.9 V 0.9 V 11.1 1.2 V 1.2 V 11.2 1.5 V 1.5 V 11.5 1.8 V 1.8 V 12.7 2.5 V 2.5 V 16.5 3.3 V 3.3 V 20.3 0.7 V 0.7 V 11.4 0.8 V 0.8 V 11.2 0.9 V 0.9 V 11.2 1.2 V 1.2 V 11.3 1.5 V 1.5 V 11.6 1.8 V 1.8 V 12.7 2.5 V 2.5 V 16.7 3.3 V 3.3 V 20.5 0.7 V 0.7 V 2.2 0.8 V 0.8 V 2.1 0.9 V 0.9 V 2.1 1.2 V 1.2 V 2.1 1.5 V 1.5 V 2.2 1.8 V 1.8 V 2.3 2.5 V 2.5 V 2.7 3.3 V 3.3 V 3.6 Submit Documentation Feedback MAX UNIT pF pF pF pF Copyright © 2020, Texas Instruments Incorporated Product Folder Links: SN74AXCH2T45 SN74AXCH2T45 www.ti.com SCES881 – FEBRUARY 2020 7 Parameter Measurement Information 7.1 Load Circuit and Voltage Waveforms Unless otherwise noted, all input pulses are supplied by generators having the following characteristics: • f = 1 MHz • ZO = 50 Ω • dv/dt ≤ 1 ns/V Measurement Point 2 x VCCO S1 RL Open Output Pin Under Test GND CL(1) (1) RL CL includes probe and jig capacitance. Figure 1. Load Circuit Table 1. Load Circuit Conditions Parameter VCCO RL CL S1 VTP Δt/Δv Input transition rise or fall rate 0.65 V – 3.6 V 1 MΩ 15 pF Open N/A 1.1 V – 3.6 V 2 kΩ 15 pF Open N/A tpd Propagation (delay) time 0.65 V – 0.95 V 20 kΩ 15 pF Open N/A ten, tdis Enable time, disable time ten, tdis Enable time, disable time 3 V – 3.6 V 2 kΩ 15 pF 2 × VCCO 0.3 V 1.65 V – 2.7 V 2 kΩ 15 pF 2 × VCCO 0.15 V 1.1 V – 1.6 V 2 kΩ 15 pF 2 × VCCO 0.1 V 0.65 V – 0.95 V 20 kΩ 15 pF 2 × VCCO 0.1 V 3 V – 3.6 V 2 kΩ 15 pF GND 0.3 V 1.65 V – 2.7 V 2 kΩ 15 pF GND 0.15 V 1.1 V – 1.6 V 2 kΩ 15 pF GND 0.1 V 0.65 V – 0.95 V 20 kΩ 15 pF GND 0.1 V VCCI(1) VCCI(1) Input A, B Input A, B VCCI / 2 VCCI / 2 100 kHz 500 ps/V ± 10 ns/V 0V tpd VOH(2) tpd VOH(2) Output B, A VCCI / 2 Output B, A Ensure Monotonic Rising and Falling Edge VCCI / 2 VOL(2) 1. 2. 0V VCCI is the supply pin associated with the input port. VOH and VOL are typical output voltage levels that occur with specified RL, CL, and S1 1. 2. VOL(2) VCCI is the supply pin associated with the input port. VOH and VOL are typical output voltage levels that occur with specified RL, CL, and S1 Figure 3. Input Transition Rise or Fall Rate Figure 2. Propagation Delay Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated Product Folder Links: SN74AXCH2T45 17 SN74AXCH2T45 SCES881 – FEBRUARY 2020 www.ti.com VCCA DIR VCCA / 2 VCCA / 2 GND ten(1) Output A(2) VCCO(5) VCCO / 2 VOL + VTP VOL(6) tdis VOH(6) VOH - VTP Output A(3) VCCO / 2 GND ten Output B (1) (2) VCCO(5) VCCO / 2 VOL + VTP VOL(6) tdis VOH(6) Output B(3) VOH - VTP VCCO / 2 GND (1) Illustrative purposes only. Enable Time is a calculation as described in the Application Information section. (2) Output waveform on the condition that input is driven to a valid Logic Low. (3) Output waveform on the condition that input is driven to a valid Logic High. (4) VCCI is the supply pin associated with the input port. (5) VCCO is the supply pin associated with the output port. (6) VOH and VOL are typical output voltage levels with specified RL, CL, and S1. Figure 4. Enable Time And Disable Time 18 Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated Product Folder Links: SN74AXCH2T45 SN74AXCH2T45 www.ti.com SCES881 – FEBRUARY 2020 8 Detailed Description 8.1 Overview The SN74AXCH2T45 is a 2-bit, dual-supply noninverting bidirectional voltage level translation device. Ax pins and the DIR pin are referenced to VCCA logic levels, and Bx pins are referenced to VCCB logic levels. The A port is able to accept I/O voltages ranging from 0.65 V to 3.6 V, while the B port can accept I/O voltages from 0.65 V to 3.6 V. A high on DIR enables data transmission from A to B and a low on DIR enables data transmission from B to A. See Device Functional Modes for a summary of the operation of the control logic. 8.2 Functional Block Diagram VCCA VCCB DIR Bus-Hold A1 B1 Bus-Hold Bus-Hold A2 B2 Bus-Hold Note: Bus-hold circuits are only present for data inputs, not control inputs 8.3 Feature Description 8.3.1 Standard CMOS Inputs Standard CMOS inputs are high impedance and are typically modeled as a resistor in parallel with the input capacitance given in the Electrical Characteristics. The worst case resistance is calculated with the maximum input voltage, given in the Absolute Maximum Ratings, and the maximum input leakage current, given in the Electrical Characteristics, using ohm's law (R = V ÷ I). Signals applied to the inputs need to have fast edge rates, as defined by Δt/Δv in Recommended Operating Conditions to avoid excessive current consumption and oscillations. If a slow or noisy input signal is required, a device with a Schmitt-trigger input should be used to condition the input signal prior to the standard CMOS input. 8.3.2 Balanced High-Drive CMOS Push-Pull Outputs A balanced output allows the device to sink and source similar currents. The high drive capability of this device creates fast edges into light loads so routing and load conditions should be considered to prevent ringing. Additionally, the outputs of this device are capable of driving larger currents than the device can sustain without being damaged. The electrical and thermal limits defined in the Absolute Maximum Ratings must be followed at all times. 8.3.3 Partial Power Down (Ioff) The inputs and outputs for this device enter a high-impedance state when the device is powered down, inhibiting current backflow into the device. The maximum leakage into or out of any input or output pin on the device is specified by Ioff in the . 8.3.4 VCC Isolation The inputs and outputs for this device enter a high-impedance state when either supply is