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Texas Instruments SN74LXCH8T245 8-Bit Bus Transceiver

Texas Instruments SN74LXCH8T245 8-Bit Bus Transceiver is a dual-supply non-inverting bidirectional voltage level translation device with bus-hold circuitry. Ax pins and control pins (DIR and OE) are referenced to VCCA logic levels, and Bx pins are referenced to VCCB logic levels. The A port can accept I/O voltages ranging from 1.1V to 5.5V, while the B port can accept I/O voltages from 1.1V to 5.5V. A high on DIR allows data transmission from A to B, and a low on DIR allows data transmission from B to A when OE is set to low. When the Texas Instruments SN74LXCH8T245 OE is set to high, both Ax and Bx pins are in the high-impedance state.

Features

  • A fully configurable dual-rail design allows each port to operate from 1.1V to 5.5V
  • Robust, glitch-free power supply sequencing
  • Up to 420Mbps support for 3.3V to 5.0V
  • 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 32mA at 5V)
  • Low power consumption
    • 4µA maximum (25°C)
    • 12µA maximum (–40°C to 125°C)
  • VCC isolation and VCC disconnect feature
    • If either VCC supply is < 100mV 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 and OE) are referenced to VCCA
  • Operating temperature from –40°C to +125°C
  • Latch-up performance exceeds 100mA per JESD 78, Class II
  • ESD protection exceeds JESD 22
    • 4000V human-body model
    • 1000V charged-device model

Applications

  • Eliminate slow or noisy input signals
  • Driving indicator LEDs or buzzers
  • Debouncing a mechanical switch
  • General purpose I/O level shifting
  • Push-pull level shifting (UART, SPI, JTAG, and so forth)

Functional Block Diagram

Block Diagram - Texas Instruments SN74LXCH8T245 8-Bit Bus Transceiver

Related Development Tool

Texas Instruments AVCLVCDIRCNTRL-EVM Direction Evaluation Module

Offers support for 1, 2, 4, and 8-ch LVC and AVC family direction-controlled translation devices.

Learn Moretungkol sa Texas Instruments AVCLVCDIRCNTRL-EVM Direction Evaluation Module View Productskaugnay ng Texas Instruments AVCLVCDIRCNTRL-EVM Direction Evaluation Module
Inilathala: 2021-03-19 | Na-update: 2022-03-11