74AHC123 Philips Semiconductors, 74AHC123 Datasheet - Page 5

• Manufacturer Part Number: 74AHC123
• Description: Dual retriggerable monostable multivibrator with reset
• Manufacturer: Philips Semiconductors

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