Datasheet: 
74LVC244A / 74LVCH244A Octal buffer/line driver with 5 V tolerant inputs/outputs (3-state)
Package: SOT163-1 SO20 plastic small outline package; 20 leads; body width 7.5 mm
General description
The 74LVC244A/74LVCH244A is a high performance, low-power, low-voltage, Si-gate CMOS device, superior to most advanced CMOS compatible TTL families.
Inputs can be driven from either 3.3 or 5 V devices. In 3-state operation, outputs can handle 5 V. These features allow the use of these devices as translators in a mixed 3.3 and 5 V environment.
The 74LVC244A/74LVCH244A is an octal non-inverting buffer/line driver with 3-state outputs. The 3-state outputs are controlled by the output enable inputs 1OE and 2OE. A HIGH on nOE causes the outputs to assume a high-impedance OFF-state. Schmitt-trigger action at all inputs makes the circuit highly tolerant for slower input rise and fall times.
The 244 is functionally identical to the 240, but the 240 has inverting outputs.
Features
- 5 V tolerant inputs/outputs for interfacing with 5 V logic
- Wide supply voltage range from 1.2 to 3.6 V
- CMOS low power consumption
- Direct interface with TTL levels
- Inputs accept voltages up to 5.5 V
- High-impedance when VCC =0 V
- Bushold on all data inputs (74LVCH244A only)
- Complies with JEDEC standard no. 8-1A
- ESD protection:
- HBM EIA/JESD22-A114-A exceeds 2000 V
- MM EIA/JESD22-A115-A exceeds 200 V.
- Specified from -40 to +85 Cel and -40 to +125 Cel.