SN74LVC16T245DLR.B中文资料德州仪器数据手册PDF规格书

1 Features

1• Control Inputs VIH/VIL Levels are Referenced to

V CCA Voltage

• VCC Isolation Feature – If Either VCC Input is at

GND, Both Ports are in the High-Impedance State

• Overvoltage-Tolerant Inputs and Outputs Allow

Mixed Voltage-Mode Data Communications

• Fully Configurable Dual-Rail Design Allows Each

Port to Operate Over the Full 1.65-V to 5.5-V

Power-Supply Range

• I off Supports Partial-Power-Down Mode Operation

• Latch-Up Performance Exceeds 100 mA Per

JESD 78, Class II

• ESD Protection Exceeds JESD 22

2 Applications

• Personal Electronics

• Industrial

• Enterprise

• Telecom

3 Description

This 16-bit noninverting bus transceiver uses two

separate configurable power-supply rails. The A port

is 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-V voltage nodes.

The SN74LVC16T245 device 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

always is active and must have a logic HIGH or LOW

level applied to prevent excess ICC and ICCZ.