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74HC137 Datasheet(PDF) 13 Page - NXP Semiconductors

Part No. 74HC137
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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74HC137 Datasheet(HTML) 13 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
13 of 19
Philips Semiconductors
74HC137
3-to-8 line decoder, demultiplexer with address latches; inverting
13. Application information
Test data is given in Table 9.
Definitions for test circuit:
RT = Termination resistance should be equal to output impedance Zo of the pulse generator.
CL = Load capacitance including jig and probe capacitance.
Fig 9.
Load circuitry for switching times
Table 9:
Test data
Supply
Input
Load
VCC
VI
tr, tf
CL
2.0 V
VCC
6 ns
50 pF
4.5 V
VCC
6 ns
50 pF
6.0 V
VCC
6 ns
50 pF
5.0 V
VCC
6 ns
15 pF
mna101
VCC
VI
VO
RT
CL
PULSE
GENERATOR
D.U.T.
Fig 10. 6-to-64 line decoder with input address storage
001aab885
16
137
outputs
to five
other
decoders
17 18 19 20 21 22 23
Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
LE
A2 A1 A0
E1 E2
8
137
outputs
9
10 11 12 13 14 15
Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
LE
A2 A1 A0
E1 E2
0
137
outputs
1
2
3
4
5
6
7
Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
LE
A2 A1 A0
E1 E2
0
137
12
3
4
5
6
7
Y0
X0
decoder enable
input
address
strobe
X1
X2
X3
X4
X5
Y1 Y2 Y3 Y4 Y5 Y6 Y7
LE
A2 A1 A0
E1 E2


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