SN74ALVC164245DGGR集成电路（IC）的转换器电平移位器规格书PDF中文资料

SN74ALVC164245DGGR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SN74ALVC164245DGGR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• Member of the Texas Instruments Widebus™

Family

• Maximum tpd of 5.8 ns at 3.3 V

• ±24-mA Output Drive at 3.3 V

• Control Inputs VIH/VIL Levels Are Referenced to

VCCA Voltage

• Latch-Up Performance Exceeds 250 mA Per

JESD 17

2 Applications

• Electronic Points of Sale

• Printers and Other Peripherals

• Motor Drives

• Wireless and Telecom Infrastructures

• Wearable Health and Fitness Devices

3 Description

This 16-bit (dual-octal) noninverting bus transceiver

contains two separate supply rails. B port has VCCB,

which is set to operate at 3.3 V and 5 V. A port has

VCCA, which is set to operate at 2.5 V and 3.3 V. This

allows for translation from a 2.5-V to a 3.3-V

environment, and vice versa, or from a 3.3-V to a 5-V

environment, and vice versa.

The SN74ALVC164245 is designed for asynchronous

communication between data buses. The control

circuitry (1DIR, 2DIR, 1OE, and 2OE) is powered by

VCCA.

To ensure the high-impedance state during power up

or power down, the output-enable (OE) input should

be tied to VCC through a pullup resistor; the minimum

value of the resistor is determined by the currentsinking

capability of the driver.

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.