 Semiconductor Components Industries, LLC, 1999
December, 1999 – Rev. 6
1 Publication Order Number:
SN74LS122/D
C0083C0078C0055C0052C0076C0083C0049C0050C0050 C0083C0078C0055C0052C0076C0083C0049C0050C0051
C0082C0101C0116C0114C0105C0103C0103C0101C0114C0097C0098C0108C0101 C0077C0111C0110C0111C0115C0116C0097C0098C0108C0101
C0077C0117C0108C0116C0105C0118C0105C0098C0114C0097C0116C0111C0114C0115
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
GUARANTEED OPERATING RANGES
Symbol Parameter Min Typ Max Unit
V
CC
Supply Voltage 4.75 5.0 5.25 V
T
A
Operating Ambient
Temperature Range
0 25 70 °C
I
OH
Output Current – High –0.4 mA
I
OL
Output Current – Low 8.0 mA
R
ext
External Timing Resistance 5.0 260 kC0087
C
ext
External Capacitance No Restriction
R
ext
/C
ext
Wiring Capacitance at
R
ext
/C
ext
Terminal
50 pF
LOW POWER SCHOTTKY
Device Package Shipping
ORDERING INFORMATION
SN74LS123N 16 Pin DIP
SN74LS123D 16 Pin
SOIC
D SUFFIX
CASE 751A
http://onsemi.com
PLASTIC
N SUFFIX
CASE 646
14
1
14
1
SOIC
D SUFFIX
CASE 751B
PLASTIC
N SUFFIX
CASE 648
16
1
16
1
SN74LS122N 14 Pin DIP 2000 Units/Box
SN74LS122D 14 Pin 2500/Tape & Reel
2000 Units/Box
2500/Tape & Reel