74HCT123D NXP Semiconductors, 74HCT123D Datasheet - Page 19

• Manufacturer Part Number: 74HCT123D
• Description: IC, MONO MULTIVIBRATOR, 30NS, SOIC-16
• Manufacturer: NXP Semiconductors

Specifications of 74HCT123D

• Multivibrator Type: Retriggerable Monostable
• Output Current: 4mA
• Logic Case Style: SOIC
• No. Of Pins: 16
• Supply Voltage Range: 4.5V To 5.5V
• Propagation Delay: 30ns
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Philips Semiconductors
12. Application information
74HC_HCT123_4
Product data sheet
12.1 Timing component connections
12.2 Power-up considerations
The basic output pulse width is essentially determined by the values of the external timing
components R
When the monostable is powered-up it may produce an output pulse, with a pulse width
defined by the values of R
circuit shown in
Fig 13. Timing component connections
Fig 14. Power-up output pulse elimination circuit
(1) For minimum noise generation it is recommended to ground pins 6 (2CEXT) and 14 (1CEXT)
externally to pin 8 (GND).
EXT
Figure
and C
14.
Rev. 04 — 16 June 2006
EXT
A
B
A
B
EXT
.
and C
1 (9)
2 (10)
Dual retriggerable monostable multivibrator with reset
1 (9)
2 (10)
123
EXT
123
GND
8
GND
8
. This output pulse can be eliminated using the
RESET
(1)
nCEXT
14 (6)
74HC123; 74HCT123
nCEXT
14 (6)
C EXT
C EXT
nRD
3 (11)
nRD
3 (11)
15 (7)
15 (7)
001aaa854
nREXT/CEXT
nREXT/CEXT
R EXT
R EXT
13 (5)
4 (12)
13 (5)
4 (12)
001aaa613
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
V
CC
V
V
CC
CC
Q
Q
Q
Q
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