The SN74AVC16T245-Q1 is a 16-bit noninverting bus transceiver that uses two separate
configurable power-supply rails. The SN74AVC16T245-Q1 is optimized to operate with
VCCA or VCCB set at 1.4 V to 3.6 V. It is operational
with VCCA or VCCB as low as 1.2 V. The A port is
designed to track VCCA. VCCA accepts any supply
voltage from 1.2 V to 3.6 V. The B port is designed to track VCCB.
VCCB accepts any supply voltage from 1.2 V to 3.6 V. This allows for
universal low-voltage bidirectional translation between any of the 1.2-V, 1.5-V, 1.8-V, 2.5-V, and
3.3-V voltage nodes.
The SN74AVC16T245-Q1 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 effectively are isolated.
The SN74AVC16T245-Q1 is designed so that the control pins (1DIR, 2DIR,
1OE, and 2OE) are supplied by
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.
The VCC isolation feature ensures that if either
VCC input is at GND, both ports are in the high-impedance state.
To ensure the high-impedance state during power up or power down,
OE must be tied to VCC through a pullup resistor; the
minimum value of the resistor is determined by the current-sinking capability of the driver.
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