SN74LVC8T245RHLR Programmable Logic ICS Voltage Levels 8-Bit Dual-Supply Bus Xcvr

1 Features

• Control Inputs VIH/VIL Levels Are Referenced to VCCA Voltage

• VCC Isolation Feature – If Either VCC Input Is at GND, All Are in the High-Impedance State

• Fully Configurable Dual-Rail Design Allows Each Port to Operate Over the Full 1.65-V to 5.5-V Power-Supply Range

• Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II

• ESD Protection Exceeds JESD 22

  • – 4000-V Human-Body Model (A114-A)

  • – 100-V Machine Model (A115-A)

  • – 1000-V Charged-Device Model (C101)

     

2 Applications

• Personal Electronic

• Industrial

• Enterprise

• Telecom

3 Description

This 8-bit noninverting bus transceiver uses two separate configurable power-supply rails. The SN74LVC8T245 is optimized to operate with VCCA andVCCB setat1.65Vto5.5V.TheAportis designed to track VCCA. VCCA accepts any supply voltage from 1.65 V to 5.5 V. The B port is designed to track VCCB. VCCB accepts any supply voltage from 1.65 V to 5.5 V. This allows for universal low-voltage bidirectional translation between any of the 1.8-V, 2.5-V, 3.3-V, and 5.5-V voltage nodes.

The SN74LVC8T245 is designed for asynchronous communication between two data buses. The logic levels of the direction-control (DIR) input and the output-enable (OE) input activate either the B-port outputs or the A-port outputs or place both output ports into the high-impedance mode. The device transmits data from the A bus to the B bus when the B-port outputs are activated, and from the B bus to the A bus when the A-port outputs are activated. The input circuitry on both A and B ports is always active and must have a logic HIGH or LOW level applied to prevent excess ICC and ICCZ.

The SN74LVC8T245 is designed so that the control pins (DIR and OE) are supplied by VCCA.

Device Information