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Direction-controlled voltage translators

SN74LXCH1T45

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Single-bit dual-supply transceiver with configurable voltage-level shifting

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Data sheet

SN74LXCH1T45

ACTIVE
Data sheet Order now

Product details

Technology family LXC Applications GPIO Bits (#) 1 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) 4 Features Bus-hold, Integrated pulldown resistors, Output enable, 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 Bits (#) 1 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) 4 Features Bus-hold, Integrated pulldown resistors, Output enable, 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
SOT-SC70 (DCK) 6 4.2 mm² 2 x 2.1 USON (DRY) 6 1.45 mm² 1.45 x 1 X2SON (DTQ) 6 0.8 mm² 1 x 0.8
  • 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
  • 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
  • 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
  • ESD protection exceeds JESD 22
    • 4000-V human-body model
    • 1000-V charged-device model

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.

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.
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Technical documentation

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* Data sheet SN74LXCH1T45 Single-Bit Dual-Supply Bus Transceiver With Configurable Voltage Translation, 3-State Ouputs, and Bus-Hold Inputs datasheet PDF | HTML 01 Apr 2022
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

Design & development

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Evaluation board

AVCLVCDIRCNTRL-EVM — Generic EVM for Direction-Controlled Bidirectional Translation Device Supporting AVC and LVC

The generic EVM is designed to support one, two, four and eight channel LVC and AVC direction-controlled translation devices. It also supports the bus hold and automotive -Q1 devices in the same number of channels. The AVC are low voltage translation devices with lower drive strength of 12mA. LVC (...)

User guide: PDF
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Simulation model

SN74LXC1T45 IBIS Model

SCEM790.ZIP (56 KB) - IBIS Model
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Package Pins CAD symbols, footprints & 3D models
SOT-SC70 (DCK) 6 Ultra Librarian
USON (DRY) 6 Ultra Librarian
X2SON (DTQ) 6 Ultra Librarian
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