74ALVC164245DLRG4屬于集成電路（IC）的轉換器電平移位器。由美國德州儀器公司制造生產(chǎn)的74ALVC164245DLRG4轉換器，電平移位器邏輯轉換器或電平移位器 IC 可用于在數(shù)字邏輯設備之間傳遞信息，這些設備可在不同/不兼容的供電電壓下工作，或可實現(xiàn)不同的信令方式。例如，可以將需要 5 V 電源的數(shù)字輸出傳感器連接到具有 3.3 V I/O 電源的 FPGA，或者在 CMOS 或 TTL 等單端信令方式與 PECL 或 LVDS 等差分技術之間進行轉換。

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.