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74HC137DB Datasheet(PDF) 12 Page - NXP Semiconductors

Part No. 74HC137DB
Description  3-to-8 line decoder, demultiplexer with address latches inverting
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Maker  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
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74HC137DB Datasheet(HTML) 12 Page - NXP Semiconductors

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9397 750 13804
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet
Rev. 03 — 11 November 2004
12 of 19
Philips Semiconductors
74HC137
3-to-8 line decoder, demultiplexer with address latches; inverting
12. Waveforms
VM = 0.5 × VI.
Fig 6.
Waveforms showing the address input (An) and enable input (E2) to output (Yn)
propagation delays and the output transition times
VM = 0.5 × VI.
Fig 7.
Waveforms showing the enable input (E1, LE) 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.
VM = 0.5 × VI.
Fig 8.
Waveforms showing the data set-up, hold times for An input to LE input and the
latch enable pulse width
001aab883
An, E2 input
Yn output
VM
tPHL
tTHL
tTLH
tPLH
VM
001aab884
E1, LE
input
Yn output
VM
tPHL
tTHL
tTLH
tPLH
VM
tsu
th
LE input
VM
VM
001aab875
th
tsu
tW
An input
transparant
transparant
latched
latched


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