SN74LXCH1T45DRYR

SN74LXCH1T45 SCES939 – APRIL 2022 SN74LXCH1T45 Single-Bit Dual-Supply Bus Transceiver With Configurable Voltage Translation, 3-State Ouputs, and Bus-Hold Inputs 1 Features 3 Description • The SN74LXCH1T45 is an 1-bit, dual-supply noninverting bidirectional voltage level translation device with bus-hold circuitry. The I/O pin A and control pin (DIR) are referenced to VCCA logic levels, and the I/O pin B is referenced to VCCB logic levels. The A pin is able to accept I/O voltages ranging from 1.1 V to 5.5 V, while the B port can accept I/O voltages from 1.1 V to 5.5 V. A high on DIR allows data transmission from A to B and a low on DIR allows data transmission from B to A. See Device Functional Modes for a summary of the operation of the control logic. • • • • • • • • • • • • • • Fully configurable dual-rail design allows each port to operate from 1.1 V to 5.5 V Robust, glitch-free power supply sequencing Up to 420-Mbps support for 3.3 V to 5.0 V Bus hold on data inputs eliminates the need for external pull-up and pull-down resistors Schmitt-trigger control inputs allow for slow or noisy inputs Control inputs with integrated static pull-down resistors allow for floating control inputs High drive strength (up to 32 mA at 5 V) Low power consumption – 3-µA maximum (25°C) – 6-µA maximum (–40°C to 125°C) VCC isolation and VCC disconnect feature – If either VCC supply is < 100 mV all I/O's become high-impedance – Ioff-float supports VCC disconnect operation Ioff supports partial-power-down mode operation Compatible with LVC family level shifters Control logic (DIR) are referenced to VCCA Operating temperature from –40°C to +125°C Latch-up performance exceeds 100 mA per JESD 78, class II DIR ESD protection exceeds JESD 22 – 4000-V human-body model – 1000-V charged-device model Device Information(1) PART NUMBER SN74LXCH1T45 (1) PACKAGE BODY SIZE (NOM) SC70 (DCK) (6) 2.00 mm × 1.25 mm SON (DRY) (6) 1.45 mm × 1.00 mm X2SON (DTQ) (6) 1.00 mm × 0.80 mm For all available packages, see the orderable addendum at the end of the data sheet. VCCA VCCB 2 Applications • • • • Eliminate slow or noisy input signals Driving indicator LEDs or buzzers Debouncing a mechanical switch General purpose I/O level shifting A Bus-Hold Bus-Hold Note: Bus-hold circuits are only present for data inputs, not control inputs Functional Block Diagram 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. B SN74LXCH1T45 www.ti.com SCES939 – APRIL 2022 Table of Contents 1 Features............................................................................1 2 Applications..................................................................... 1 3 Description.......................................................................1 4 Revision History.............................................................. 2 5 Pin Configuration and Functions...................................3 6 Specifications.................................................................. 4 6.1 Absolute Maximum Ratings........................................ 4 6.2 ESD Ratings............................................................... 4 6.3 Recommended Operating Conditions.........................5 6.4 Thermal Information....................................................5 6.5 Electrical Characteristics.............................................6 6.6 Switching Characteristics, VCCA = 1.2 ± 0.1 V............ 9 6.7 Switching Characteristics, VCCA = 1.5 ± 0.1 V.......... 10 6.8 Switching Characteristics, VCCA = 1.8 ± 0.15 V........ 11 6.9 Switching Characteristics, VCCA = 2.5 ± 0.2 V.......... 12 6.10 Switching Characteristics, VCCA = 3.3 ± 0.3 V........ 13 6.11 Switching Characteristics, VCCA = 5.0 ± 0.5 V........ 14 6.12 Switching Characteristics: Tsk, TMAX ......................15 6.13 Operating Characteristics....................................... 15 6.14 Typical Characteristics............................................ 16 7 Parameter Measurement Information.......................... 17 7.1 Load Circuit and Voltage Waveforms........................17 8 Detailed Description......................................................19 8.1 Overview................................................................... 19 8.2 Functional Block Diagram......................................... 19 8.3 Feature Description...................................................19 8.4 Device Functional Modes..........................................22 9 Application and Implementation.................................. 23 9.1 Application Information............................................. 23 9.2 Enable Times............................................................ 23 9.3 Typical Application.................................................... 23 10 Power Supply Recommendations..............................25 11 Layout........................................................................... 25 11.1 Layout Guidelines................................................... 25 11.2 Layout Example...................................................... 25 12 Device and Documentation Support..........................26 12.1 Documentation Support ......................................... 26 12.2 Receiving Notification of Documentation Updates..26 12.3 Support Resources................................................. 26 12.4 Trademarks............................................................. 26 12.5 Electrostatic Discharge Caution..............................26 12.6 Glossary..................................................................26 13 Mechanical, Packaging, and Orderable Information.................................................................... 26 4 Revision History 2 DATE REVISION NOTES April 2022 * Initial Release Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated Product Folder Links: SN74LXCH1T45 SN74LXCH1T45 www.ti.com SCES939 – APRIL 2022 5 Pin Configuration and Functions VCCA 6 1 VCCB GND 2 5 DIR A 3 4 B VCCA 1 6 VCCB GND 2 5 DIR A 3 4 B Figure 5-2. DRY Package Preview, 6-Pin SON (Top View) Figure 5-1. DCK Package, 6-Pin SC70 (Top View) VCCA GND A 6 1 2 3 5 4 VCCB DIR B Figure 5-3. DTQ Package Preview, 6-Pin X2SON Transparent (Top View) Table 5-1. Pin Functions PIN NAME NO. TYPE(1) DESCRIPTION A 3 I/O Input or output A. Referenced to VCCA. B 4 I/O Input or output B. Referenced to VCCB. DIR 5 I GND 2 — DIR 5 I VCCA 1 — A-port supply voltage. 1.1 V ≤ VCCA ≤ 5.5 V. VCCB 6 — B-port supply voltage. 1.1 V ≤ VCCB ≤ 5.5 V. (1) Direction-control signal for all ports. Referenced to VCCA. Ground. Direction-control signal for all ports. Referenced to VCCA. I = input, O = output, GND = ground Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated Product Folder Links: SN74LXCH1T45 3 SN74LXCH1T45 www.ti.com SCES939 – APRIL 2022 6 Specifications 6.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted)(1) MIN MAX UNIT VCCA Supply voltage A –0.5 6.5 V VCCB Supply voltage B –0.5 6.5 V I/O Ports (A Port) –0.5 6.5 VI Input Voltage(2) I/O Ports (B Port) –0.5 6.5 Control Inputs –0.5 6.5 A Port –0.5 6.5 B Port –0.5 6.5 A Port –0.5 VCCA + 0.5 B Port –0.5 VCCB + 0.5 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 –200 200 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 beyond the limits listed in Recommended Operating Conditions. 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 6.5 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) ±4000 Charged device model (CDM), per ANSI/ESDA/JEDEC JS-002(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 Document Feedback Copyright © 2022 Texas Instruments Incorporated Product Folder Links: SN74LXCH1T45 SN74LXCH1T45 www.ti.com SCES939 – APRIL 2022 6.3 Recommended Operating Conditions over operating free-air temperature range (unless otherwise noted) (1) MIN VCCA Supply voltage A VCCB Supply voltage B High-level input voltage VIH Low-level input voltage VIL IOH Data Inputs (A,B) (Referenced to VCCI) Data Inputs (A,B) (Referenced to VCCI) High-level output current IOL Low-level output current 5.5 V 1.1 5.5 V VCCI = 1.1 V - 1.3 V VCCI x 0.8 VCCI = 1.4 V - 1.95 V VCCI x 0.65 VCCI = 2.3 V - 2.7 V MAX UNIT 1.1 1.7 VCCI = 3.0 V - 3.6 V 2 VCCI = 4.5 V - 5.5 V VCCI x 0.7 V VCCI = 1.1 V - 1.3 V VCCI x 0.2 VCCI = 1.4 V - 1.95 V VCCI x 0.35 VCCI = 2.3 V - 2.7 V 0.7 VCCI = 3.0 V - 3.6 V 0.8 VCCI = 4.5 V - 5.5 V VCCI x 0.3 VCCO = 1.1 V –0.1 VCCO = 1.4 V –4 VCCO = 1.65 V –8 VCCO = 2.3 V –12 VCCO = 3 V –24 VCCO = 4.5 V –32 VCCO = 1.1 V 0.1 VCCO = 1.4 V 4 VCCO = 1.65 V 8 VCCO = 2.3 V 12 VCCO = 3 V 24 VCCO = 4.5 V VI Input voltage VO Output voltage TA (1) V mA mA 32 0 5.5 Active State 0 VCCO Tri-State 0 5.5 Operating free-air temperature –40 125 V V °C VCCI is the VCC associated with the input port. VCCO is the VCC associated with the output port. 6.4 Thermal Information SN74LXCH1T45 THERMAL METRIC(1) DCK (SC70) DRY (SON) DTQ (X2SON) UNIT 6 PINS 6 PINS 6 PINS RθJA Junction-to-ambient thermal resistance 205.2 293.4 285.0 °C/W RθJC(top) Junction-to-case (top) thermal resistance 132.4 184.0 140.0 °C/W RθJB Junction-to-board thermal resistance 65.1 164.9 208.5 °C/W YJT Junction-to-top characterization parameter 48.0 28.3 6.1 °C/W YJB Junction-to-board characterization parameter 64.9 164.0 207.8 °C/W RθJC(bottom) Junction-to-case (bottom) thermal resistance N/A N/A N/A °C/W (1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics app report. Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated Product Folder Links: SN74LXCH1T45 5 SN74LXCH1T45 www.ti.com SCES939 – APRIL 2022 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 25°C MIN VT+ VT- ΔVT VOH VOL IBHL 6 Positivegoing inputthreshold voltage Negativegoing inputthreshold voltage Inputthreshold hysteresis (VT+ – VT-) MIN TYP MAX MIN TYP MAX 1.1 V 0.44 0.88 0.44 0.88 1.4 V 1.4 V 0.60 0.98 0.60 0.98 1.65 V 1.65 V 0.76 1.13 0.76 1.13 2.3 V 1.08 1.56 1.08 1.56 3V 1.48 1.92 1.48 1.92 4.5 V 4.5 V 2.19 2.74 2.19 2.74 5.5 V 5.5 V 2.65 3.33 2.65 3.33 1.1 V 1.1 V 0.17 0.48 0.17 0.48 1.4 V 1.4 V 0.28 0.59 0.28 0.59 1.65 V 0.35 0.69 0.35 0.69 2.3 V 0.56 0.97 0.56 0.97 1.65 V Control Inputs (DIR) 2.3 V (Referenced to VCCI) 3V Control Input (DIR) (Referenced to VCCA) –40°C to 125°C 1.1 V Control Inputs 2.3 V (DIR) (Referenced to VCCI) 3V TYP MAX –40°C to 85°C 3V 0.89 1.5 0.89 1.5 4.5 V 4.5 V 1.51 1.97 1.51 1.97 5.5 V 5.5 V 1.88 2.4 1.88 2.4 1.1 V 1.1 V 0.2 0.4 0.2 0.4 1.4 V 1.4 V 0.25 0.5 0.25 0.5 1.65 V 1.65 V 0.3 0.55 0.3 0.55 2.3 V 2.3 V 0.38 0.65 0.38 0.65 3V 3V 0.46 0.72 0.46 0.72 4.5 V 4.5 V 0.58 0.93 0.58 0.93 5.5 V 5.5 V 0.69 1.06 0.69 1.06 VCCO – 0.1 VCCO – 0.1 1 1 1.65 V 1.2 1.2 2.3 V 1.9 1.9 3V 3V 2.4 2.4 4.5 V 4.5 V 3.8 3.8 IOH = –100 µA 1.1V – 5.5V 1.1V – 5.5V IOH = –4 mA 1.4 V 1.4 V IOH = –8 mA 1.65 V IOH = –12 mA 2.3 V IOH = –24 mA IOH = –32 mA IOL = 100 µA 1.1V – 5.5V 1.1V – 5.5V 0.1 0.1 IOL = 4 mA 1.4 V 1.4 V 0.3 0.3 IOL = 8 mA 1.65 V 1.65 V 0.45 0.45 IOL = 12 mA 2.3 V 2.3 V 0.3 0.3 IOL = 24 mA 3V 3V 0.55 0.55 IOL = 32 mA 4.5 V 4.5 V 0.55 0.55 VI = 0.39 1.1 V 1.1 V 4 4 VI = 0.49 Bus-hold low sustaining VI = 0.58 current Port A or Port VI = 0.70 B (6) VI = 0.80 1.4 V 1.4 V 15 10 1.65 V 1.65 V 25 20 2.3 V 2.3 V 45 45 3V 3V VI = 1.35 4.5 V 4.5 V High-level output voltage (3) Low-level output voltage (4) Submit Document Feedback 75 75 100 100 UNIT V V V V V µA Copyright © 2022 Texas Instruments Incorporated Product Folder Links: SN74LXCH1T45 SN74LXCH1T45 www.ti.com SCES939 – APRIL 2022 over operating free-air temperature range (unless otherwise noted)(1) (2) Operating free-air temperature (TA) PARAMETER TEST CONDITIONS VCCA VCCB 25°C MIN IBHH IBHLO IBHHO II Bus-hold high sustaining current Port A or Port B (7) Bus-hold low overdrive current (8) –40°C to 85°C TYP MAX MIN UNIT –40°C to 125°C TYP MAX MIN TYP MAX VI = 0.71 V 1.1 V 1.1 V –4 –4 VI = 0.91 V 1.4 V 1.4 V –15 –15 VI = 1.07 V 1.65 V 1.65 V –25 –25 VI = 1.70 V 2.3 V 2.3 V –45 –45 VI = 2.00 V 3V 3V VI = 3.15 V 4.5 V 4.5 V 1.3 V 1.3 V 75 75 1.6 V 1.6 V 125 125 1.95 V 1.95 V 200 200 2.7 V 2.7 V 300 300 3.6 V 3.6 V 500 500 5.5 V 5.5 V 900 900 1.3 V 1.3 V –75 –75 1.6 V 1.6 V –125 –125 1.95 V 1.95 V –200 –200 2.7 V 2.7 V –300 –300 3.6 V 3.6 V –500 –500 5.5 V 5.5 V –900 –900 Ramp input up VI = 0 to VCCI Bus-hold high Ramp input down overdrive VI = VCCI to 0 (9) current Control input (DIR) Input leakage VI = VCCA or GND current Data Inputs (5) (Ax, Bx) VI = VCCI or GND –75 –75 –100 –100 1.1V – 5.5V 1.1V – 5.5V -0.1 1 -0.1 2 -0.1 2 µA 1.1V – 5.5V 1.1V – 5.5V –0.3 1 –1 1 –2 2 µA A Port or B Port Partial power VI or VO = 0 V - 5.5 down current V 0V 0 V - 5.5 V –1 1 –2 2 –2.5 2.5 0 V - 5.5 V 0V –1 1 –2 2 –2.5 2.5 Floating (10) 0 V - 5.5 V –1.5 1.5 –2 2 –2.5 2.5 Ioff-float Floating supply Partial A Port or B Port power down VI or VO = GND current –1.5 1.5 –2 2 –2.5 2.5 0 V - 5.5 V Floating (10) 1.1V – 5.5V 1.1V – 5.5V ICCB ICCA + ICCB VCCA supply current VCCB supply current Combined supply current µA µA Ioff ICCA µA VI = VCCI or GND IO = 0 0V 5.5 V 5.5 V 0V VI = GND IO = 0 5.5 V 2 –0.2 2 –0.5 µA 4 –1 1 1 2 Floating (10) 1.5 1.5 2 1.1V – 5.5V 1.1V – 5.5V 2 2 4 VI = VCCI or GND IO = 0 0V 5.5 V 1 1 2 5.5 V 0V VI = GND IO = 0 Floating (10) 5.5 V VI = VCCI or GND IO = 0 1.1V – 5.5V 1.1V – 5.5V –0.2 µA –0.5 µA µA –1 1.5 1.5 2 3 4 6 µA Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated Product Folder Links: SN74LXCH1T45 7 SN74LXCH1T45 www.ti.com SCES939 – APRIL 2022 over operating free-air temperature range (unless otherwise noted)(1) (2) Operating free-air temperature (TA) PARAMETER TEST CONDITIONS VCCA VCCB 25°C MIN MIN UNIT –40°C to 125°C TYP MAX MIN TYP MAX Control input (DIR): VI = VCCA – 0.6 V A port = VCCA or GND B Port = open 3.0V - 5.5V A Port: VI = VCCA – 0.6 V DIR = VCCA, B Port = open 3.0V - 5.5V 3.0V - 5.5V 50 75 ΔICCB VCCB additional supply current per input B Port: VI = VCCB 0.6 V DIR = GND, A Port = open 3.0V - 5.5V 3.0V - 5.5V 50 75 µA Ci Control Input Capacitance VI = 3.3 V or GND 3.3 V 3.3 V 2.2 4 4 pF Cio Data I/O Capacitance VCCO = 0V VO = 1.65V DC +1 MHz -16 dBm sine wave 3.3 V 3.3 V 4.9 10 7 pF ΔICCA (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) 8 TYP MAX –40°C to 85°C VCCA additional supply current per input 3.0V - 5.5V 50 75 µA VCCI is the VCC associated with the input port VCCO is the VCC associated with the output port Tested at VI = VT+(MAX) Tested at VI = VT-(MIN) For I/O ports, the parameter Il includes the IOZ current IBHL should be measured after lowering VI to GND and then raising it to the defined input voltage IBHH should be measured after raising VI to VCCI and then lowering it to the defined input voltage An external driver must source at least IBHLO to switch this node from low-to-high An external driver must sink at least IBHHO to switch this node from high to low Floating is defined as a node that is both not actively driven by an external device and has leakage not exeeding 10nA Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated Product Folder Links: SN74LXCH1T45 SN74LXCH1T45 www.ti.com SCES939 – APRIL 2022 6.6 Switching Characteristics, VCCA = 1.2 ± 0.1 V See Figure 7-1 and Table 7-1 for test circuit and loading. See Figure 7-2, Figure 7-3, and Figure 7-4 for measurement waveforms. PARAMETER FROM TO Test Conditions B-Port Supply Voltage (VCCB) 1.2 ± 0.1 V MIN TYP tpd tdis A B B A DIR A DIR B Propagation delay Disable time DIR ten A Enable time DIR B 1.5 ± 0.1 V MAX MIN TYP 1.8 ± 0.15 V MAX MIN TYP 2.5 ± 0.2 V MAX MIN TYP 3.3 ± 0.3 V MAX MIN TYP 5.0 ± 0.5 V MAX MIN TYP UNIT MAX -40°C to 85°C 6 85 4 41 3 36 1 33 1 34 1 44 -40°C to 125°C 8 55 6 37 5 33 3 30 3 30 2 33 -40°C to 85°C 6 85 5 71 4 67 3 60 3 57 3 58 -40°C to 125°C 8 55 6 47 6 43 5 38 4 37 4 36 -40°C to 85°C 5 53 5 53 5 53 5 53 5 53 4 53 -40°C to 125°C 7 47 7 47 7 47 7 47 7 47 7 47 -40°C to 85°C 10 85 7 47 6 41 5 34 5 33 4 32 -40°C to 125°C 14 71 11 48 10 41 8 34 8 33 6 32 -40°C to 85°C 21 150 17 110 16 99 13 86 13 83 12 85 -40°C to 125°C 27 121 23 89 21 80 17 68 17 65 15 63 -40°C to 85°C 16 118 14 89 13 84 12 81 11 82 11 92 -40°C to 125°C 19 97 18 79 17 73 16 68 15 67 14 70 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated Product Folder Links: SN74LXCH1T45 ns ns ns 9 SN74LXCH1T45 www.ti.com SCES939 – APRIL 2022 6.7 Switching Characteristics, VCCA = 1.5 ± 0.1 V See Figure 7-1 and Table 7-1 for test circuit and loading. See Figure 7-2, Figure 7-3, and Figure 7-4 for measurement waveforms. PARAMETER FROM TO Test Conditions B-Port Supply Voltage (VCCB) 1.2 ± 0.1 V MIN TYP tpd tdis A B B A DIR A DIR B Propagation delay Disable time DIR ten Enable time DIR 10 A B 1.5 ± 0.1 V MAX MIN TYP 1.8 ± 0.15 V MAX MIN TYP 2.5 ± 0.2 V MAX MIN TYP 3.3 ± 0.3 V MAX MIN TYP 5.0 ± 0.5 V MAX MIN TYP UNIT MAX -40°C to 85°C 1 70 1 29 1 24 1 20 1 19 1 19 -40°C to 125°C 1 46 1 29 1 24 1 21 1 19 1 20 -40°C to 85°C 1 39 1 29 1 26 1 23 1 21 1 21 -40°C to 125°C 1 36 1 29 1 26 1 23 1 21 1 21 -40°C to 85°C 3 29 3 29 3 29 3 29 3 29 3 29 -40°C to 125°C 5 29 5 29 5 29 5 29 5 29 5 29 -40°C to 85°C 11 78 8 45 7 38 5 31 5 30 4 28 -40°C to 125°C 15 70 14 46 11 40 10 32 9 31 8 29 -40°C to 85°C 19 113 15 69 13 59 11 49 11 46 9 44 -40°C to 125°C 27 101 23 70 21 61 18 51 17 48 15 45 -40°C to 85°C 12 91 10 53 9 48 8 43 8 41 7 41 -40°C to 125°C 16 71 14 54 13 49 12 44 12 42 11 42 Submit Document Feedback ns ns ns Copyright © 2022 Texas Instruments Incorporated Product Folder Links: SN74LXCH1T45 SN74LXCH1T45 www.ti.com SCES939 – APRIL 2022 6.8 Switching Characteristics, VCCA = 1.8 ± 0.15 V See Figure 7-1 and Table 7-1 for test circuit and loading. See Figure 7-2, Figure 7-3, and Figure 7-4 for measurement waveforms. PARAMETER FROM TO Test Conditions B-Port Supply Voltage (VCCB) 1.2 ± 0.1 V MIN TYP tpd tdis A B B A DIR A DIR B Propagation delay Disable time DIR ten A Enable time DIR B 1.5 ± 0.1 V MAX MIN TYP 1.8 ± 0.15 V MAX MIN TYP 2.5 ± 0.2 V MAX MIN TYP 3.3 ± 0.3 V MAX MIN TYP 5.0 ± 0.5 V MAX MIN TYP UNIT MAX -40°C to 85°C 1 66 1 26 1 21 1 17 1 16 1 15 -40°C to 125°C 1 43 1 27 1 22 1 18 1 17 1 16 -40°C to 85°C 1 35 1 24 1 21 1 18 1 17 1 17 -40°C to 125°C 1 32 1 24 1 22 1 19 1 18 1 17 -40°C to 85°C 2 22 2 22 2 23 2 23 2 22 2 22 -40°C to 125°C 4 23 4 31 4 23 4 23 4 23 4 23 -40°C to 85°C 9 73 7 40 6 34 4 27 4 25 3 23 -40°C to 125°C 15 64 13 42 11 36 6 28 8 27 6 25 -40°C to 85°C 17 103 13 59 12 50 9 40 9 38 7 35 -40°C to 125°C 23 90 21 61 19 53 16 43 12 39 12 37 -40°C to 85°C 11 80 9 44 8 39 7 34 6 33 6 32 -40°C to 125°C 14 61 12 45 11 40 10 36 10 34 9 35 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated Product Folder Links: SN74LXCH1T45 ns ns ns 11 SN74LXCH1T45 www.ti.com SCES939 – APRIL 2022 6.9 Switching Characteristics, VCCA = 2.5 ± 0.2 V See Figure 7-1 and Table 7-1 for test circuit and loading. See Figure 7-2, Figure 7-3, and Figure 7-4 for measurement waveforms. PARAMETER FROM TO Test Conditions B-Port Supply Voltage (VCCB) 1.2 ± 0.1 V MIN TYP tpd tdis A B B A DIR A DIR B Propagation delay Disable time DIR ten Enable time DIR 12 A B 1.5 ± 0.1 V MAX MIN TYP 1.8 ± 0.15 V MAX MIN TYP 2.5 ± 0.2 V MAX MIN TYP 3.3 ± 0.3 V MAX MIN TYP 5.0 ± 0.5 V MAX MIN TYP UNIT MAX -40°C to 85°C 1 59 1 23 1 19 1 15 1 13 1 12 -40°C to 125°C 1 38 1 23 1 19 1 15 1 14 1 13 -40°C to 85°C 1 32 1 20 1 17 1 15 1 14 1 13 -40°C to 125°C 1 29 1 21 1 18 1 15 1 14 1 14 -40°C to 85°C 1 16 1 23 1 16 1 16 1 20 1 16 -40°C to 125°C 2 16 2 16 2 16 2 25 2 16 2 16 -40°C to 85°C 8 63 6 35 5 29 3 23 3 22 2 19 -40°C to 125°C 13 56 10 37 10 31 8 25 7 23 5 20 -40°C to 85°C 14 91 11 49 10 41 8 33 7 30 6 27 -40°C to 125°C 21 76 18 51 16 44 14 35 13 32 10 29 -40°C to 85°C 8 67 6 33 5 33 4 25 4 24 4 23 -40°C to 125°C 11 49 9 34 8 30 7 27 7 27 6 24 Submit Document Feedback ns ns ns Copyright © 2022 Texas Instruments Incorporated Product Folder Links: SN74LXCH1T45 SN74LXCH1T45 www.ti.com SCES939 – APRIL 2022 6.10 Switching Characteristics, VCCA = 3.3 ± 0.3 V See Figure 7-1 and Table 7-1 for test circuit and loading. See Figure 7-2, Figure 7-3, and Figure 7-4 for measurement waveforms. PARAMETER FROM TO Test Conditions B-Port Supply Voltage (VCCB) 1.2 ± 0.1 V MIN TYP tpd tdis A B B A DIR A DIR B Propagation delay Disable time DIR ten A Enable time DIR B 1.5 ± 0.1 V MAX MIN TYP 1.8 ± 0.15 V MAX MIN TYP 2.5 ± 0.2 V MAX MIN TYP 3.3 ± 0.3 V MAX MIN TYP 5.0 ± 0.5 V MAX MIN TYP UNIT MAX -40°C to 85°C 1 57 1 21 1 17 1 14 1 12 1 11 -40°C to 125°C 1 36 1 22 1 18 1 14 1 13 1 12 -40°C to 85°C 1 33 1 19 1 16 1 13 1 12 1 12 -40°C to 125°C 1 29 1 19 1 17 1 14 1 13 1 12 -40°C to 85°C 1 14 1 14 1 14 1 14 1 20 1 14 -40°C to 125°C 1 34 1 15 1 15 1 15 1 15 1 17 -40°C to 85°C 7 59 5 32 5 27 3 21 3 20 2 18 -40°C to 125°C 12 52 9 33 9 29 7 23 7 22 5 19 -40°C to 85°C 13 86 10 44 9 37 7 30 7 28 5 25 -40°C to 125°C 19 71 16 46 14 39 12 32 12 29 10 26 -40°C to 85°C 8 64 6 30 5 27 4 23 4 22 3 22 -40°C to 125°C 10 46 9 31 8 28 7 24 6 23 6 22 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated Product Folder Links: SN74LXCH1T45 ns ns ns 13 SN74LXCH1T45 www.ti.com SCES939 – APRIL 2022 6.11 Switching Characteristics, VCCA = 5.0 ± 0.5 V See Figure 7-1 and Table 7-1 for test circuit and loading. See Figure 7-2, Figure 7-3, and Figure 7-4 for measurement waveforms. PARAMETER FROM TO Test Conditions B-Port Supply Voltage (VCCB) 1.2 ± 0.1 V MIN TYP tpd tdis A B B A DIR A DIR B Propagation delay Disable time DIR ten Enable time DIR 14 A B 1.5 ± 0.1 V MAX MIN TYP 1.8 ± 0.15 V MAX MIN TYP 2.5 ± 0.2 V MAX MIN TYP 3.3 ± 0.3 V MAX MIN TYP 5.0 ± 0.5 V MAX MIN TYP UNIT MAX -40°C to 85°C 1 57 1 21 1 17 1 13 1 12 1 11 -40°C to 125°C 1 36 1 21 1 17 1 14 1 12 1 11 -40°C to 85°C 1 47 1 19 1 15 1 12 1 11 1 11 -40°C to 125°C 1 33 1 20 1 16 1 13 1 12 1 11 -40°C to 85°C 1 12 1 12 1 21 1 12 1 15 1 12 -40°C to 125°C 1 12 1 12 1 20 1 12 1 12 1 12 -40°C to 85°C 1 57 1 30 4 25 3 20 3 19 2 17 -40°C to 125°C 11 50 9 31 8 27 6 21 6 20 4 18 -40°C to 85°C 8 98 6 42 8 34 7 27 7 25 5 23 -40°C to 125°C 18 73 15 44 13 36 11 29 11 27 9 24 -40°C to 85°C 6 62 4 28 3 24 3 20 2 19 2 18 -40°C to 125°C 9 43 7 28 6 25 5 21 4 20 4 19 Submit Document Feedback ns ns ns Copyright © 2022 Texas Instruments Incorporated Product Folder Links: SN74LXCH1T45 SN74LXCH1T45 www.ti.com SCES939 – APRIL 2022 6.12 Switching Characteristics: Tsk, TMAX over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VCCI Up Translation TMAX - Maximum Data Rate 50% Duty Cycle Input One channel switching 20% of pulse > 0.7*VCCO 20% of pulse < 0.3*VCCO VCCO tsk – Output skew Timing skew between any two switching outputs within the same device Down Translation UNIT -40°C to 125°C MIN TYP 3.0 V – 3.6 V 4.5 V – 5.5 V 200 420 2.25 V - 2.75 V 4.5 V - 5.5 V 150 300 1.65 V – 1.95 V 4.5 V – 5.5 V 100 200 1.1 V – 1.3 V 4.5 V – 5.5 V 20 40 1.65 V – 1.95 V 3.0 V – 3.6 V 100 210 1.1 V – 1.3 V 3.0 V – 3.6 V 10 20 1.1 V – 1.3 V 1.65 V – 1.95 V 4.5 V – 5.5 V 3.0 V – 3.6 V 4.5 V – 5.5 V 4.5 V – 5.5 V Down Translation 4.5 V – 5.5 V Up Translation Operating free-air temperature (TA) 5 10 100 210 2.25 V - 2.75 V 75 140 1.65 V – 1.95 V 50 75 MAX Mbps 1.1 V – 1.3 V 15 30 3.0 V – 3.6 V 1.65 V – 1.95 V 40 75 3.0 V – 3.6 V 1.1 V – 1.3 V 10 20 1.65 V – 1.95 V 1.1 V – 1.3 V 5 10 3.0 V – 3.6 V 4.5 V – 5.5 V 1 1.65 V – 1.95 V 4.5 V – 5.5 V 2 1.1 V – 1.3 V 4.5 V – 5.5 V 3 1.65 V – 1.95 V 3.0 V – 3.6 V 2.5 1.1 V – 1.3 V 3.0 V – 3.6 V 3.5 1.1 V – 1.3 V 1.65 V – 1.95 V 4.5 4.5 V – 5.5 V 3.0 V – 3.6 V 1 4.5 V – 5.5 V 1.65 V – 1.95 V 2 4.5 V – 5.5 V 1.1 V – 1.3 V 3 3.0 V – 3.6 V 1.65 V – 1.95 V 3 3.0 V – 3.6 V 1.1 V – 1.3 V 4 1.65 V – 1.95 V 1.1 V – 1.3 V 5 ns 6.13 Operating Characteristics TA = 25℃ (1) Supply Voltage (VCCB = VCCA) PARAMETER A to B CpdA (2) B to A A to B CpdB (1) (2) (2) B to A Test Conditions A Port CL = 0, RL = Open f = 10 MHz trise = tfall = 1 ns B Port CL = 0, RL = Open f = 10 MHz trise = tfall = 1 ns 1.2 ± 0.1V 1.5 ± 0.1V 1.8 ± 0.15V 2.5 ± 0.2V 3.3 ± 0.3V 5.0 ± 0.5V TYP TYP TYP TYP TYP TYP 3.5 3.7 3.9 4.2 4.5 5 20.2 20.5 20.7 21.5 22.8 24.9 20.2 20.5 20.8 21.5 22.8 24.8 3.5 3.7 3.9 4.2 4.5 5.1 UNIT pF pF See the CMOS Power Consumption and Cpd Calculation application report for more information about power dissipation capacitance. CpdA and CpdB are respectively A-Port and B-Port power dissipation capacitances per transceiver. Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated Product Folder Links: SN74LXCH1T45 15 SN74LXCH1T45 www.ti.com SCES939 – APRIL 2022 6.14 Typical Characteristics 4.5 1.6 4 VOH Output High Voltage (V) 1.8 VOH Output High Voltage (V) 5 1.4 VCC = 5 V VCC = 3.3 V VCC = 2.5 V 3.5 1.2 3 2.5 0.8 2 VCC = 1.8 V VCC = 1.5 V VCC = 1.2 V 0.6 1.5 0.4 0 5 10 15 20 25 30 35 40 IOH  Output High Current (mA) 45 50 Figure 6-1. Typical (TA=25°C) Output High Voltage (VOH) vs Source Current (IOH) 0 0.35 0.35 VOL Output Low Voltage (V) 0.4 VOL Output Low Voltage (V) 0.45 0.4 0.3 5 7.5 10 12.5 15 17.5 20 IOH  Output High Current (mA) 22.5 25 0.3 0.25 0.2 0.15 0.2 0.15 0.1 VCC = 5 V VCC = 3.3 V VCC = 2.5 V 0.05 0 0 5 10 15 20 25 30 35 40 IOL  Output Low Current (mA) 45 0.1 VCC = 1.8 V VCC = 1.5 V VCC = 1.2 V 0.05 0 50 Figure 6-3. Typical (TA=25°C) Output High Voltage (VOL) vs Sink Current (IOL) 2 0 2.5 5 7.5 10 12.5 15 17.5 20 IOL  Output Low Current (mA) 22.5 25 Figure 6-4. Typical (TA=25°C) Output High Voltage (VOL) vs Sink Current (IOL) 0.22 VCC = 5 V VCC = 3.3 V VCC = 2.5 V 1.8 VCC = 1.8 V VCC = 1.5 V VCC = 1.2 V 0.2 0.18 ICC Supply Current (mA) 1.6 ICC Supply Current (mA) 2.5 Figure 6-2. Typical (TA=25°C) Output High Voltage (VOH) vs Source Current (IOH) 0.45 0.25 0.16 1.4 0.14 1.2 0.12 1 0.8 0.1 0.08 0.6 0.06 0.4 0.04 0.2 0.02 0 0 0.5 1 1.5 2 2.5 3 3.5 VIN  Input Voltage (V) 4 4.5 5 Figure 6-5. Typical (TA=25°C) Supply Current (ICC) vs Input Voltage (VIN) 16 1 0 0 0.2 0.4 0.6 0.8 1 1.2 VIN  Input Voltage (V) 1.4 1.6 1.8 Figure 6-6. Typical (TA=25°C) Supply Current (ICC) vs Input Voltage (VIN) Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated Product Folder Links: SN74LXCH1T45 SN74LXCH1T45 www.ti.com SCES939 – APRIL 2022 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 • Δt/ΔV ≤ 1 ns/V Measurement Point 2 x VCCO RL S1 Output Pin Under Test Open CL(1) A. GND RL CL includes probe and jig capacitance. Figure 7-1. Load Circuit Table 7-1. Load Circuit Conditions Parameter tpd Propagation (delay) time ten, tdis Enable time or disable time ten, tdis Enable time or disable time VCCO RL CL S1 1.1 V – 5.5 V 2 kΩ 15 pF Open N/A 1.1 V – 1.6 V 2 kΩ 15 pF 2 × VCCO 0.1 V 1.65 V – 2.7 V 2 kΩ 15 pF 2 × VCCO 0.15 V 3.0 V – 5.5 V 2 kΩ 15 pF 2 × VCCO 0.3 V 1.1 V – 1.6 V 2 kΩ 15 pF GND 0.1 V 1.65 V – 2.7 V 2 kΩ 15 pF GND 0.15 V 3.0 V – 5.5 V 2 kΩ 15 pF GND 0.3 V VCCI(1) VCCI(1) Input A, B 100 kHz Input A, B VCCI / 2 VCCI / 2 VTP 500 ps/V ± 1 s/V 0V 0V tpd tpd VOH(2) VOH(2) Output B, A Output B, A VCCI / 2 VCCI / 2 VOL(2) VOL(2) 1. 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 7-2. Propagation Delay Ensure Monotonic Rising and Falling Edge 1. 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 7-3. Input Transition Rise and Fall Rate Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated Product Folder Links: SN74LXCH1T45 17 SN74LXCH1T45 www.ti.com SCES939 – APRIL 2022 VCCA OE VCCA / 2 VCCA / 2 GND tdis ten VCCO(3) Output(1) VCCO / 2 VOL + VTP VOL(4) VOH(4) VOH - VTP Output(2) VCCO / 2 GND 1. 2. 3. 4. Output waveform on the condition that input is driven to a valid Logic Low. Output waveform on the condition that input is driven to a valid Logic High. VCCO is the supply pin associated with the output port. VOH and VOL are typical output voltage levels with specified RL, CL, and S1. Figure 7-4. Enable Time And Disable Time 18 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated Product Folder Links: SN74LXCH1T45 SN74LXCH1T45 www.ti.com SCES939 – APRIL 2022 8 Detailed Description 8.1 Overview The SN74LXCH1T45 is a 1-bit translating transceiver that uses two individually configurable power-supply rails. The device is operational with VCCA and VCCB supplies as low as 1.1 V and as high as 5.5 V. Additionally, the device operates with VCCA = VCCB. The A port is designed to track VCCA, and the B port is designed to track VCCB. The SN74LXCH1T45 device is designed for asynchronous communication between data buses and transmits data from the A bus to the B bus or from the B bus to the A bus based on the logic level of the direction-control input (DIR). The control pin of the SN74LXCH1T45 (DIR) is referenced to VCCA. 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 sourced into an input, output, or I/O while the device is powered down. The VCC isolation and VCC disconnect feature ensures that if either VCC is less than 100 mV or floating with the complementary supply within the recommended operating conditions, both I/O ports are set to the high-impedance state by disabling their outputs and the supply current is maintained. Glitch-free power supply sequencing allows either supply rail to power on or off in any order while providing robust power sequencing performance. 8.2 Functional Block Diagram VCCA VCCB DIR A Bus-Hold B Bus-Hold Note: Bus-hold circuits are only present for data inputs, not control inputs 8.3 Feature Description 8.3.1 CMOS Schmitt-Trigger 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). The Schmitt-trigger input architecture provides hysteresis as defined by ΔVT in the Electrical Characteristics, which makes this device extremely tolerant to slow or noisy inputs. Driving the inputs slowly will increase dynamic current consumption of the device. See Understanding Schmitt Triggers for additional information regarding Schmitt-trigger inputs. 8.3.1.1 Control Inputs with Integrated Static Pull-Down Resistors Similar to the data I/O's, floating control inputs can cause high current consumption. This device has integrated weak static pull-downs of 5-MΩ typical on the control inputs (DIR and OE) to help avoid this concern. These pull-downs are always present. For example, if the DIR pin is left floating, then the B port will be configured as an input and the A port will be configured as an output. Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated Product Folder Links: SN74LXCH1T45 19 SN74LXCH1T45 www.ti.com SCES939 – APRIL 2022 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. Ioff in the Electrical Characteristics specifies the maximum leakage into or out of any input or output pin on the device. 8.3.4 VCC Isolation and VCC Disconnect The inputs and outputs for this device enter a high-impedance state when either supply is