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SN54LS490 Datasheet(PDF) 2 Page - Texas Instruments

Part # SN54LS490
Description  DUAL 4-BIT DECADE COUNTERS
PDF  8 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

SN54LS490 Datasheet(HTML) 2 Page - Texas Instruments

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SN54LS490, SN74LS490
DUAL 4-BIT DECADE COUNTERS
SDLS125A – OCTOBER 1976 – REVISED JULY 1998
2
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
BCD COUNT SEQUENCE
(each counter)
COUNT
OUTPUTS
COUNT
QD
QC
QB
QA
0
L
L
L
L
1
L
LL
H
2
L
LH
L
3
L
LH
H
4
L
HL
L
5
L
HLH
6
L
HH
L
7
L
HH
H
8
H
LL
L
9
H
L
L
H
logic symbol†
CTRDIV10
CT=0
2
1CLR
CT=9
4
1SET9
1
1CLK
+
3
0
5
6
7
3
14
2CLR
12
2SET9
15
2CLK
13
11
10
9
CT
1QA
1QB
1QC
1QD
2QA
2QB
2QC
2QD
† This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Pin numbers shown are for the D, J, N, and W packages.



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