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.