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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.