SN74LS122 SN74LS123
Retriggerable Monostable
Multivibrators
These dc triggered multivibrators feature pulse width control by
three methods. The basic pulse width is programmed by selection of
external resistance and capacitance values. The LS122 has an internal
timing resistor that allows the circuits to be used with only an external
capacitor. Once triggered, the basic pulse width may be extended by
retriggering the gated low-level-active (A) or high-level-active (B)
inputs, or be reduced by use of the overriding clear.
•
Overriding Clear Terminates Output Pulse
•
Compensated for V
CC
and Temperature Variations
•
DC Triggered from Active-High or Active-Low Gated Logic Inputs
•
Retriggerable for Very Long Output Pulses, up to 100% Duty Cycle
•
Internal Timing Resistors on LS122
http://onsemi.com
LOW POWER SCHOTTKY
14
1
PLASTIC
N SUFFIX
CASE 646
GUARANTEED OPERATING RANGES
Symbol
V
CC
T
A
I
OH
I
OL
R
ext
C
ext
R
ext
/C
ext
Parameter
Supply Voltage
Operating Ambient
Temperature Range
Output Current – High
Output Current – Low
External Timing Resistance
External Capacitance
Wiring Capacitance at
R
ext
/C
ext
Terminal
5.0
Min
4.75
0
Typ
5.0
25
Max
5.25
70
– 0.4
8.0
260
No Restriction
50
pF
Unit
V
°C
mA
mA
k
W
16
1
14
1
SOIC
D SUFFIX
CASE 751A
PLASTIC
N SUFFIX
CASE 648
16
1
SOIC
D SUFFIX
CASE 751B
ORDERING INFORMATION
Device
SN74LS122N
SN74LS122D
SN74LS123N
SN74LS123D
Package
14 Pin DIP
14 Pin
16 Pin DIP
16 Pin
Shipping
2000 Units/Box
2500/Tape & Reel
2000 Units/Box
2500/Tape & Reel
©
Semiconductor Components Industries, LLC, 1999
1
December, 1999 – Rev. 6
Publication Order Number:
SN74LS122/D
ONSEMI [ ON SEMICONDUCTOR ]
