74LV123DB,118 NXP Semiconductors, 74LV123DB,118 Datasheet - Page 15

• Manufacturer Part Number: 74LV123DB,118
• Description: IC DUAL RETRIG MULTIVIB 16SSOP
• Manufacturer: NXP Semiconductors
• Series: 74LVr

Specifications of 74LV123DB,118

• Logic Type: Monostable
• Package / Case: 16-SSOP
• 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
• Elements Per Chip: 2
• Logic Family: LV
• Propagation Delay Time: 120 ns, 40 ns
• High Level Output Current: - 12 mA
• Low Level Output Current: 12 mA
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1 V
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 3.3 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 74LV123DB-T; 74LV123DB-T; 935210260118

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.
74LV123
15 of 23