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74AHC123A Datasheet(PDF) 5 Page - NXP Semiconductors

Part No. 74AHC123A
Description  Dual retriggerable monostable multivibrator with reset
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Maker  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
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74AHC123A Datasheet(HTML) 5 Page - NXP Semiconductors

 
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2000 Mar 15
5
Philips Semiconductors
Product specification
Dual retriggerable monostable multivibrator
with reset
74AHC123A;
74AHCT123A
PINNING
PIN
SYMBOL
DESCRIPTION
1, 9
1A, 2A
trigger inputs (negative-edge triggered)
2, 10
1B, 2B
trigger inputs (positive-edge triggered)
3, 11
1RD,2RD
direct reset LOW and trigger action at positive edge
4, 12
1Q, 2Q
outputs (active LOW)
5, 13
2Q, 1Q
outputs (active HIGH)
6, 14
2CEXT, 1CEXT
external capacitor connection
7, 15
2REXT/CEXT, 1REXT/CEXT
external resistor/capacitor connection
8
GND
ground (0 V)
16
VCC
DC supply voltage
handbook, halfpage
1A
1B
1RD
1Q
2Q
2CEXT
2REXT/CEXT
GND
VCC
1REXT/CEXT
1CEXT
1Q
2RD
2B
2Q
2A
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
123
MNA514
Fig.1 Pin configuration.
handbook, halfpage
1Q
Q
2RD
RD
S
2REXT/CEXT
13
7
1REXT/CEXT 15
2CEXT
6
1CEXT 14
2Q
5
1Q
Q
4
2Q 12
9
MNA515
1RD
2A
11A
10 2B
2
11
3
1B
T
Fig.2 Logic diagram.


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