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DM74LS123

Fairchild Semiconductor
Part Number DM74LS123
Manufacturer Fairchild Semiconductor
Description Dual Retriggerable One-Shot
Published Apr 1, 2005
Detailed Description DM74LS123 Dual Retriggerable One-Shot with Clear and Complementary Outputs August 1986 Revised April 2000 DM74LS123 Du...
Datasheet PDF File DM74LS123 PDF File

DM74LS123
DM74LS123

Overview
DM74LS123 Dual Retriggerable One-Shot with Clear and Complementary Outputs August 1986 Revised April 2000 DM74LS123 Dual Retriggerable One-Shot with Clear and Complementary Outputs General Description The DM74LS123 is a dual retriggerable monostable multivibrator capable of generating output pulses from a few nano-seconds to extremely long duration up to 100% duty cycle.
Each device has three inputs permitting the choice of either leading edge or trailing edge triggering.
Pin (A) is an active-LOW transition trigger input and pin (B) is an activeHIGH transition trigger input.
The clear (CLR) input terminates the output pulse at a predetermined time independent of the timing components.
The clear input also serves as a trigger input when it is pulsed with a low level pulse transition ( ).
To obtain the best trouble free operation from this device please read the operating rules as well as the Fairchild Semiconductor one-shot application notes carefully and observe recommendations.
Features s DC triggered from active-HIGH transition or active-LOW transition inputs s Retriggerable to 100% duty cycle s Compensated for VCC and temperature variations s Triggerable from CLEAR input s DTL, TTL compatible s Input clamp diodes Ordering Code: Order Number DM74LS123M DM74LS123SJ DM74LS123N Package Number M16A M16D N16E Package Description 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.
150 Narrow 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.
3mm Wide 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.
300 Wide Devices also available in Tape and Reel.
Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram Function Table Inputs CLEAR L X X H H ↑ A X H X L ↓ L B X X L ↑ H H Q L L Outputs Q H H H = HIGH Logic Level L = LOW Logic Level X = Can Be Either LOW or HIGH ↑ = Positive Going Transition ↓ = Negative Going Transition = A Positive Pulse = A Negative Pulse L H © 2000 Fairchild Semiconduc...


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