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74HC643

Octal bus transceiver; 3-state; true/inverting

Philips Electronics 

Philips Semiconductors

Octal bus transceiver; 3-state;

true/inverting

AC WAVEFORMS

Product specification

74HC/HCT643

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

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

Fig.5 Waveforms showing the input (An) to output

(Bn) propagation delays and the output

transition times.

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

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

Fig.6 Waveforms showing the input (Bn) to

output (An) propagation delays and the

output transition times.

PACKAGE OUTLINES

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

(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 for OE and DIR inputs.

December 1990

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