74LVC245AD データシートの表示（PDF） - Philips Electronics

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74LVC245AD

Octal bus transceiver with direction pin with 5 V tolerant input/outputs (3-state)

Philips Electronics 

Philips Semiconductors

Octal bus transceiver with direction pin with 5 V tolerant

input/outputs (3-state)

AC WAVEFORMS

Product specification

74LVC245A;

74LVCH245A

handbook, halfpage VI

An, Bn input

GND

tPLH

VOH

Bn, An output

VOL

VM

VM

VM

tPHL

VM

MNA176

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.5 The inputs An, Bn to outputs Bn, An 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 + 0.1 V at VCC < 2.7 V;

VY = VOH − 0.3 V at VCC ≥ 2.7 V;

VY = VOH − 0.1 V at VCC < 2.7 V.

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

Fig.6 3-state enable and disable times.

2003 May 07

10

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