74HC7245 查看數據表（PDF） - Philips Electronics

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74HC7245

Octal bus Schmitt-trigger transceiver; 3-state

Philips Electronics 

Philips Semiconductors

Octal bus Schmitt-trigger transceiver;

3-state

AC WAVEFORMS

Product specification

74HC/HCT7245

(1) HC : VM = 50%; VI = GND to VCC.

HCT: VM = 1.3 V; VI = GND to 3 V.

Fig.6 Waveforms showing the input (An, Bn) to output (Bn, An) propagation delays and the output transition times.

handbook, full pagewidth

tr

OEn INPUT

10 %

90 %

VM (1)

t PLZ

OUTPUT

LOW - to - OFF

OFF - to - LOW

OUTPUT

HIGH - to - OFF

OFF - to - HIGH

t PHZ

10 %

90 %

MBA322

outputs

enabled

tf

t PZL

VM (1)

t PZH

outputs

disabled

VM (1)

outputs

enabled

(1) HC : VM = 50%; VI = GND to VCC.

HCT: VM = 1.3 V; VI = GND to 3 V.

Fig.7 Waveforms showing the 3-state enable and disable times.

PACKAGE OUTLINES

See “74HC/HCT/HCU/HCMOS Logic Package Outlines”.

December 1990

7

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