1. General description

The 74LV244AT is an 8-bit buffer/line driver with 3-state outputs and TTL inputs. The

device features two output enables (1OE and 2OE). A HIGH on nOE causes the

associated outputs to assume a high-impedance OFF-state.

Designed to operate over a VCC range from 4.5 V to 5.5 V, the inputs are TTL compatible,

which allows the device to be used to translate from 3.3 V to 5 V.

Schmitt-trigger action at all inputs makes the circuit tolerant of slower input rise and fall

times.

This device is fully specified for partial Power-down applications using IOFF.

The IOFF circuitry disables the output, preventing the damaging backflow current through

the device when it is powered down.

2. Features and benefits

 Direct interface with TTL levels

 Supply voltage range from 4.5 V to 5.5 V

 Typical tpd of 2.8 ns at 5 V

 Typical VOL(p) < 0.8 V at VCC = 5 V, Tamb = 25 C

 Typical VOH(v) > 2.3 V at VCC = 5 V, Tamb = 25 C

 Supports mixed-mode voltage operation on all ports

 IOFF circuitry provides partial Power-down mode operation

 Latch-up performance exceeds 250 mA per JESD 78 Class II

 ESD protection:

 HBM ANSI/ESDA/JEDEC JS-001 Class 2 exceeds 3 kV

 MM JESD22-A115-A exceeds 150 V

 CDM JESD22-C101E exceeds 2 kV

 Specified from 40 C to +85 C and from 40 C to +125 C