74HC237 查看數據表（PDF） - Philips Electronics

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74HC237

3-to-8 line decoder / demultiplexer with address latches

Philips Electronics 

Philips Semiconductors

3-to-8 line decoder/demultiplexer with

address latches

AC WAVEFORMS

Product specification

74HC/HCT237

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

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

Fig.6

Waveforms showing the address input (An)

and enable inputs (E2, LE) to output (Yn)

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.7 Waveforms showing the enable input (E1) to

output (Yn) propagation delays and the

output transition times.

The shaded areas indicate when the input is permitted

to change for predictable output performance.

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

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

Fig.8 Waveforms showing the data set-up, hold times for An input to LE input and the latch enable pulse width.

December 1990

8

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