This 16-bit (dual-octal) noninverting bus transceiver uses two separate configurable
power-supply rails. The
A port is designed to track VCCA. VCCA accepts
any supply voltage from 1.4 V to 3.6 V. The B port is designed to track
VCCB. VCCB accepts any supply voltage from 1.4 V to
3.6 V. This allows for universal low-voltage bidirectional translation between any of the 1.5-V,
1.8-V, 2.5-V, and 3.3-V voltage nodes.
The SN74AVCB164245 is designed for asynchronous communication between data buses. The
device transmits data from the A bus to the B bus or from the B bus to the A bus, depending on the
logic level at the direction-control (DIR) input. The output-enable (OE)
input can be used to disable the outputs so the buses are effectively isolated.
The SN74AVCB164245 is designed so that the control pins (1DIR, 2DIR,
1OE, and 2OE) are supplied by
To ensure the high-impedance state during power up or power down,
OE should be tied to VCCB through a pullup resistor;
the minimum value of the resistor is determined by the current-sinking capability of the
This device is fully specified for partial-power-down applications using
Ioff. The Ioff circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down. If either
VCC input is at GND, both ports are in the high-impedance state.
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