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| 74HC237N Datasheet, PDF (12/19 Pages) NXP Semiconductors – 3-to-8 line decoder, demultiplexer with address latches | |||
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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 Ã 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 Ã 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 Ã 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 â 12 November 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
12 of 19
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