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Direction-controlled voltage translators

SN74LXC2T45

ACTIVE

2-bit dual supply transceiver with configurable voltage-level shifting and tri-state outputs

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Data sheet

SN74LXC2T45

ACTIVE
Data sheet Order now

Product details

Technology family LXC Applications GPIO, JTAG, UART Bits (#) 2 High input voltage (min) (V) 0.44 High input voltage (max) (V) 5.5 Vout (min) (V) 1.1 Vout (max) (V) 5.5 Data rate (max) (Mbps) 420 IOH (max) (mA) -32 IOL (max) (mA) 32 Supply current (max) (µA) 6 Features Integrated pulldown resistors, Overvoltage tolerant inputs, Partial power down (Ioff), Vcc disconnect, Vcc isolation Input type Schmitt-Trigger Output type Push-Pull Rating Catalog Operating temperature range (°C) -40 to 125
Technology family LXC Applications GPIO, JTAG, UART Bits (#) 2 High input voltage (min) (V) 0.44 High input voltage (max) (V) 5.5 Vout (min) (V) 1.1 Vout (max) (V) 5.5 Data rate (max) (Mbps) 420 IOH (max) (mA) -32 IOL (max) (mA) 32 Supply current (max) (µA) 6 Features Integrated pulldown resistors, Overvoltage tolerant inputs, Partial power down (Ioff), Vcc disconnect, Vcc isolation Input type Schmitt-Trigger Output type Push-Pull Rating Catalog Operating temperature range (°C) -40 to 125
VSSOP (DCU) 8 6.2 mm² 2 x 3.1 X1QFN (DTT) 8 1.95 mm² 1.95 x 1 X2SON (DTM) 8 1.08 mm² 0.8 x 1.35
  • 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
  • Schmitt-trigger inputs allow for slow or noisy inputs
  • I/O’s with integrated dynamic pull-down resistors help reduce external component count
  • 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 (Ioff-float) feature
    • If either VCC supply is < 100 mV or disconnected, all I/O’s get pulled-down and then become high-impedance
  • 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
  • ESD protection exceeds JESD 22
    • 4000-V human-body model
    • 1000-V charged-device model
  • 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
  • Schmitt-trigger inputs allow for slow or noisy inputs
  • I/O’s with integrated dynamic pull-down resistors help reduce external component count
  • 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 (Ioff-float) feature
    • If either VCC supply is < 100 mV or disconnected, all I/O’s get pulled-down and then become high-impedance
  • 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
  • ESD protection exceeds JESD 22
    • 4000-V human-body model
    • 1000-V charged-device model

The SN74LXC2T45 is a dual-bit, dual-supply noninverting bidirectional voltage level translation device. Ax pins and control pin (DIR) 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 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.

The SN74LXC2T45 is a dual-bit, dual-supply noninverting bidirectional voltage level translation device. Ax pins and control pin (DIR) 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 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.
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Technical documentation

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Type Title Date
* Data sheet SN74LXC2T45 Dual-Bit Dual-Supply Bus Transceiver with Configurable Level Shifting datasheet (Rev. B) PDF | HTML 05 Mar 2022
Application note Schematic Checklist - A Guide to Designing With Fixed or Direction Control Translators PDF | HTML 02 Oct 2024
Application note Schematic Checklist - A Guide to Designing with Auto-Bidirectional Translators PDF | HTML 12 Jul 2024
Application note Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) PDF | HTML 03 Jul 2024
Application brief Enabling Power-Efficient FPGA Designs With Level Translation PDF | HTML 30 Apr 2024
Application brief Enabling Smart Battery Energy Storage Systems with Voltage Level Translation PDF | HTML 04 Jun 2023
Product overview Enabling System on Module Industrial PC Connectivity With Level Translation PDF | HTML 03 Apr 2023
Application brief Enabling Next Generation Processors, FPGA, and ASSP with Voltage Level Translat PDF | HTML 17 Jan 2023
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Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

5-8-LOGIC-EVM — Generic logic evaluation module for 5-pin to 8-pin DCK, DCT, DCU, DRL and DBV packages

Flexible EVM designed to support any device that has a DCK, DCT, DCU, DRL, or DBV package in a 5 to 8 pin count.
User guide: PDF
Not available on TI.com
Evaluation board

5-8-NL-LOGIC-EVM — Generic logic and translation EVM supporting 5 to 8 pin DPW, DQE, DRY, DSF, DTM, DTQ and DTT pkgs

Generic EVM designed to support any logic or translation device that has a DTT, DRY, DPW, DTM, DQE, DQM, DSF, or DTQ package. Board design allows for flexible evaluation.

User guide: PDF | HTML
Not available on TI.com
Evaluation board

AXC2T-SMALLPKGEVM — AXC2T small package evaluation module for DTM and RSW package devices

This EVM is designed to support DTM and RSW packages for the AXC and LVC family of DIR controlled bidirectional devices. The AXC and AVC devices belong to the low voltage direction controlled translation family with operating voltage from 0.65V to 3.6V (AXC) and 1.2 to 3.6 (AVC) with 12mA of drive (...)
User guide: PDF
Not available on TI.com
Simulation model

SN74LXC2T45 IBIS Model

SCEM789.ZIP (56 KB) - IBIS Model
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Package Pins CAD symbols, footprints & 3D models
VSSOP (DCU) 8 Ultra Librarian
X1QFN (DTT) 8 Ultra Librarian
X2SON (DTM) 8 Ultra Librarian
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