1. General description

The 74AHC244; 74AHCT244 is an 8-bit buffer/line driver with 3-state outputs. The device can be

used as two 4-bit buffers or one 8-bit buffer. The device features two output enables (1OE and

2OE), each controlling four of the 3-state outputs. A HIGH on nOE causes the outputs to assume

a high-impedance OFF-state. Inputs are overvoltage tolerant. This feature allows the use of these

devices as translators in mixed voltage environments.

2. Features and benefits

• Wide supply voltage range from 2.0 V to 5.5 V

• Balanced propagation delays

• All inputs have Schmitt-trigger action

• Overvoltage tolerant inputs to 5.5 V

• High noise immunity

• CMOS low power dissipation

• Input levels:

• For 74AHC244: CMOS level

• For 74AHCT244: TTL level

• ESD protection:

• HBM JESD22-A114F exceeds 2000 V

• MM JESD22-A115-A exceeds 200 V

• CDM JESD22-C101E exceeds 1000 V

• Latch-up performance exceeds 100 mA per JESD 78 Class II Level A

• Multiple package options

• Specified from -40 °C to +85 °C and from -40 °C to +125 °C