74LVC16T245DGVRG4集成电路（IC）的转换器电平移位器规格书PDF中文资料

74LVC16T245DGVRG4属于集成电路（IC）的转换器电平移位器。由美国德州仪器公司制造生产的74LVC16T245DGVRG4转换器，电平移位器逻辑转换器或电平移位器 IC 可用于在数字逻辑设备之间传递信息，这些设备可在不同/不兼容的供电电压下工作，或可实现不同的信令方式。例如，可以将需要 5 V 电源的数字输出传感器连接到具有 3.3 V I/O 电源的 FPGA，或者在 CMOS 或 TTL 等单端信令方式与 PECL 或 LVDS 等差分技术之间进行转换。

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.