TI SN74LVC244AQPWRQ1

This octal buffer/line driver is operational at 1.5-V to 3.6-V VCC, but is designed specifically for 1.65-V to 3.6-V VCC operation. The SN74LVC244A is organized as two 4-bit line drivers with separate output-enable (OE(overline)) 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. Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of this device as a translator in a mixed 3.3-V/5-V system environment. 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. 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.

• Operates From 1.65 V to 3.6 V
• Inputs Accept Voltages to 5.5 V
• Specified From -40℃ to 85℃ and -40℃ to 125℃
• Max tpd of 5.9 ns at 3.3 V
• Typical V0LP (Output Ground Bounce) < 0.8 V at VCC = 3.3 V, TA = 25℃
• Typical V0HV (Output V0H Undershoot) > 2 V at VCC = 3.3 V, TA = 25℃
• Supports Mixed-Mode Signal Operation on All Ports (5-V Input/Output Voltage With 3.3-V VCC)
• Ioff Supports Partial-Power-Down Mode Operation
• Latch-Up Performance Exceeds 250 mA Per JESD 17

• Level translation for mixed-voltage systems
• Line signal buffer driving
• Applications requiring partial power-down functionality