0
ACTIVE
Supply voltage (min) (V) |
0.8 |
Supply voltage (max) (V) |
2.7 |
Number of channels |
8 |
IOL (max) (mA) |
9 |
IOH (max) (mA) |
-9 |
Input type |
CMOS |
Output type |
CMOS |
Features |
Balanced outputs, Bus-hold, Over-voltage tolerant inputs, Partial power down (Ioff), Ultra high speed (tpd <5ns) |
Technology family |
AUC |
Rating |
Catalog |
Operating temperature range (°C) |
-40 to 85 |
VQFN (RGY)-20-15.75 mm² 4.5 x 3.5
This octal bus transceiver is operational at 0.8-V to 2.7-V VCC, but is designed specifically for 1.65-V to 1.95-V VCC operation.
The SN74AUCH245 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 device so the buses are effectively isolated.
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended.
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.
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