74HC237D(2004) 查看數據表（PDF） - NXP Semiconductors.

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74HC237D
(Rev.:2004)

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

NXP Semiconductors. 

Philips Semiconductors

12. Waveforms

74HC237

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

An, E2, LE

input

VM

Yn output

tPHL

VM

tPLH

tTHL

tTLH

001aab873

VM = 0.5 × VI.

Fig 6. Waveforms showing the address input (An) and enable inputs (E2, LE) to output

(Yn) propagation delays and the output transition times

E1 input

VM

Yn output

tPHL

VM

tPLH

tTHL

tTLH

001aab874

VM = 0.5 × VI.

Fig 7. Waveforms showing the enable input (E1) to output (Yn) propagation delays and

the output transition times

An input

VM

LE input

tsu

transparant

th

VM

latched

tsu

th

transparant latched

tW

001aab875

Fig 8.

The shaded areas indicate when the input is permitted to change for predictable output

performance.

VM = 0.5 × VI.

Waveforms showing the data set-up, hold times for An input to LE input and the

latch enable pulse width

9397 750 13807

Product data sheet

Rev. 03 — 12 November 2004

© Koninklijke Philips Electronics N.V. 2004. All rights reserved.

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