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74LVC244ABQ

Octal buffer/line driver with 5 V tolerant inputs/outputs (3-state)

Philips Electronics 

Philips Semiconductors

Octal buffer/line driver with 5 V tolerant

inputs/outputs (3-state)

AC WAVEFORMS

Product specification

74LVC244A; 74LVCH244A

handbook, halfpage VI

nAn input

GND

tPLH

VOH

nYn output

VOL

VM

VM

VM

tPHL

VM

MNA171

VM = 1.5 V at VCC ≥ 2.7 V.

VM = 0.5VCC at VCC < 2.7 V.

VOL and VOH are typical output voltage drop that occur with the output load.

Fig.6 Input nAn to output nYn propagation delays.

handbook, full pagewidth

VI

nOE input

GND

VCC

output

LOW-to-OFF

OFF-to-LOW

VOL

VOH

output

HIGH-to-OFF

OFF-to-HIGH

GND

VM

tPLZ

tPZL

tPHZ

VX

VY

VM

tPZH

VM

outputs

enabled

outputs

disabled

outputs

enabled

MNA362

VM = 1.5 V at VCC ≥ 2.7 V.

VM = 0.5VCC at VCC < 2.7 V.

VX = VOL + 0.3 V at VCC ≥ 2.7 V;

VX = VOL + 0.1VCC at VCC < 2.7 V.

VY = VOH + 0.3 V at VCC ≥ 2.7 V;

VY = VOH + 0.1VCC at VCC < 2.7 V.

VOL and VOH are typical output voltage drop that occur with the output load.

Fig.7 3-state enable and disable times.

2003 Oct 30

10

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