74HC251 datasheet(7/7 Pages) PHILIPS

7 / 7 page

December 1990

7

Philips Semiconductors

Product speciﬁcation

8-input multiplexer; 3-state

74HC/HCT251

AC WAVEFORMS

PACKAGE OUTLINES

See

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

Fig.6

Waveforms showing the multiplexer input (In) and select input (Sn) to output (Y) propagation delays and

the output transition times.

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

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

Fig.7

Waveforms showing the multiplexer input (In) and select input (Sn) to output (Y) propagation delays and

the output transition times.

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

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

Fig.8 Waveforms showing the 3-state enable and disable times.

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

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

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