74HCT123DB NXP Semiconductors, 74HCT123DB Datasheet - Page 16

• Manufacturer Part Number: 74HCT123DB
• Manufacturer: NXP Semiconductors

Specifications of 74HCT123DB

• Logic Family: HCT
• High Level Output Current: -4mA
• Low Level Output Current: 4mA
• Quiescent Current: 8nA
• Number Of Elements: 2
• Operating Temperature Classification: Automotive
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (typ): 5V
• Operating Temperature (min): -40C
• Operating Temperature (max): 125C
• Technology: CMOS
• Abs. Propagation Delay Time: 77ns
• Operating Supply Voltage (min): 4.5V
• Lead Free Status / RoHS Status: Compliant

NXP Semiconductors
74HC_HCT123_5
Product data sheet
12.3 Power-down considerations
A large capacitor C
the energy stored in this capacitor. When a system containing this device is
powered-down or a rapid decrease of V
damage, due to the capacitor discharging through the input protection diodes. To avoid
this possibility, use a damping diode (D
diode able to withstand large current surges and connect as shown in
Fig 15. Power-down protection circuit
EXT
nA
nB
may cause problems when powering-down the monostable due to
Rev. 05 — 13 July 2009
1 (9)
2 (10)
Dual retriggerable monostable multivibrator with reset
123
GND
8
EXT
CC
) preferably a germanium or Schottky type
to zero occurs, the monostable may sustain
nCEXT
14 (6)
74HC123; 74HCT123
C EXT
nRD
3 (11)
15 (7)
nREXT/CEXT
001aaa614
D EXT
R EXT
13 (5)
4 (12)
nQ
nQ
V
CC
Figure
© NXP B.V. 2009. All rights reserved.
15.
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