74LS12 Datasheet | Fairchild Semiconductor

w w w . D a t a S h e e t 4 U . c o m DM74LS123 Dual Retriggerable One-Shot with Clear and plementary Outputs August 1986 Revised April 2000 DM74LS123 Dual Retriggerable One-Shot with Clear and plementary 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 ponents. 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 remendations. Features s DC triggered from active-HIGH transition or active-LOW transition inputs s Retriggerable to 100% duty cycle s pensated for VCC and temperature variations s Triggerable from CLEAR input s DTL, TTL patible 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...