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74HC390 Datasheet(PDF) 4 Page - NXP Semiconductors

Part No. 74HC390
Description  Dual decade ripple counter
Download  7 Pages
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Maker  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74HC390 Datasheet(HTML) 4 Page - NXP Semiconductors

  74HC390 Datasheet HTML 1Page - NXP Semiconductors 74HC390 Datasheet HTML 2Page - NXP Semiconductors 74HC390 Datasheet HTML 3Page - NXP Semiconductors 74HC390 Datasheet HTML 4Page - NXP Semiconductors 74HC390 Datasheet HTML 5Page - NXP Semiconductors 74HC390 Datasheet HTML 6Page - NXP Semiconductors 74HC390 Datasheet HTML 7Page - NXP Semiconductors  
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December 1990
4
Philips Semiconductors
Product specification
Dual decade ripple counter
74HC/HCT390
Fig.4 Functional diagram.
BCD COUNT SEQUENCE
FOR 1/2 THE “390”
Notes
1. Output Q0 connected to nCP1
with counter input on nCP0.
H = HIGH voltage level
L = LOW voltage level
COUNT
OUTPUTS
Q0
Q1
Q2
Q3
0
LLLL
1
H
LLL
2L
H
L
L
3
HHL
L
4
LLH
L
5H
L
H
L
6
L
HHL
7
HHHL
8
LLLH
9
H
LLH
BI-QUINARY COUNT SEQUENCE
FOR 1/2 THE “390”
Note
1. Output Q3 connected to nCP0
with counter input on nCP1.
COUNT
OUTPUTS
Q0
Q1
Q2
Q3
0
LLLL
1L
H
L
L
2
LLH
L
3
L
HHL
4
LLLH
5
H
LLL
6
HHL
L
7H
L
H
L
8
HHHL
9
H
LLH
Fig.5 Logic diagram (one counter).


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