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74HC123DB Datasheet(PDF) 4 Page - NXP Semiconductors

Part # 74HC123DB
Description  Dual retriggerable monostable multivibrator with reset
PDF  25 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74HC123DB Datasheet(HTML) 4 Page - NXP Semiconductors

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74HC_HCT123
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 8 — 16 December 2011
4 of 25
NXP Semiconductors
74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
5.
Pinning information
5.1 Pinning
5.2 Pin description
(1) The die substrate is attached to this pad using
conductive die attach material. It can not be used as
supply pin or input.
Fig 5.
Pin configuration for DIP16, SO16, SSOP16
and TSSOP16
Fig 6.
Pin configuration for DHVQFN16
74HC123
74HCT123
1A
VCC
1B
1REXT/CEXT
1RD
1CEXT
1Q
1Q
2Q
2Q
2CEXT
2RD
2REXT/CEXT
2B
GND
2A
001aaa698
1
2
3
4
5
6
7
8
10
9
12
11
14
13
16
15
001aaf046
74HC123
2REXT/CEXT
2B
2CEXT
2RD
2Q
2Q
1Q
1Q
1RD
1CEXT
1B
1REXT/CEXT
Transparent top view
7
10
6
11
5
12
4
13
3
14
2
15
terminal 1
index area
VCC(1)
Table 2.
Pin description
Symbol
Pin
Description
1A
1
negative-edge triggered input 1
1B
2
positive-edge triggered input 1
1RD
3
direct reset LOW and positive-edge triggered input 1
1Q
4
active LOW output 1
2Q
5
active HIGH output 2
2CEXT
6
external capacitor connection 2
2REXT/CEXT
7
external resistor and capacitor connection 2
GND
8
ground (0 V)
2A
9
negative-edge triggered input 2
2B
10
positive-edge triggered input 2
2RD
11
direct reset LOW and positive-edge triggered input 2
2Q
12
active LOW output 2
1Q
13
active HIGH output 1
1CEXT
14
external capacitor connection 1
1REXT/CEXT
15
external resistor and capacitor connection 1
VCC
16
supply voltage



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