74LV123D,118 NXP Semiconductors, 74LV123D,118 Datasheet - Page 15
74LV123D,118
Manufacturer Part Number
74LV123D,118
Description
IC DUAL RETRIG MULTIVIB 16SOIC
Manufacturer
NXP Semiconductors
Series
74LVr
Datasheet
1.74LV123D118.pdf
(23 pages)
Specifications of 74LV123D,118
Logic Type
Monostable
Independent Circuits
2
Schmitt Trigger Input
Yes
Propagation Delay
14ns
Current - Output High, Low
12mA, 12mA
Voltage - Supply
1 V ~ 5.5 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
16-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
74LV123D-T
74LV123D-T
935210250118
74LV123D-T
935210250118
NXP Semiconductors
74LV123_5
Product data sheet
12.1.3 Reset timing
12.2.1 Power-up
12.2.2 Power-down
12.2 Power considerations
When the monostable multivibrator is powered-up, it may produce an output pulse with a
pulse width defined by the values of R
using the RC circuit on pin nRD shown in
A large capacitor (C
to 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, connect a damping diode D
diode) able to withstand large current surges - see
Fig 13. Output pulse control using reset input nRD
Fig 14. Power-up and power-down circuit
nA = LOW
EXT
Rev. 05 — 8 November 2007
nRD input
nQ output
nB input
) may cause problems when powering-down the monostable due
nA
nB
1 (9)
2 (10)
Dual retriggerable monostable multivibrator with reset
74LV123
t
W
GND
8
EXT
CC
RESET
Figure
and C
EXT
to zero occurs, the monostable may sustain
nCEXT
14 (6)
C EXT
(preferably a germanium or Schottky type
EXT
nRD
14.
3 (11)
Figure
. This output pulse can be eliminated
15 (7)
nREXT/CEXT
R EXT
D EXT
13 (5)
4 (12)
001aae532
14.
V
CC
t
W
001aae527
V
nQ
nQ
CC
© NXP B.V. 2007. All rights reserved.
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