This octal buffer/driver 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 SN74AUCH244 is organized as two 4-bit line drivers with separate output-enable (OE)\ inputs. When OE\ is low, the device passes data from the A inputs to the Y outputs. When OE\ is high, the outputs are in the high-impedance state.
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.
|Part number||Order||Technology Family||VCC (Min) (V)||VCC (Max) (V)||Channels (#)||IOL (Max) (mA)||IOH (Max) (mA)||ICC (uA)||Input type||Output type||Features||Data rate (Mbps)||Rating||Package Group|
Ultra high speed (tpd <5ns)
Partial power down (Ioff)
Over-voltage tolerant inputs
|500||Catalog||VQFN | 20|