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DM74LS123NX Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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DM74LS123NX Datasheet(HTML) 1 Page - Fairchild Semiconductor |
1 / 8 page © 2000 Fairchild Semiconductor Corporation DS006386 www.fairchildsemi.com August 1986 Revised April 2000 DM74LS123 Dual Retriggerable One-Shot with Clear and Complementary Outputs General Description The DM74LS123 is a dual retriggerable monostable multi- vibrator 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 active- HIGH transition trigger input. The clear (CLR) input termi- nates the output pulse at a predetermined time indepen- dent 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: Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagram Function Table 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 Order Number Package Number Package Description DM74LS123M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow DM74LS123SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide DM74LS123N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Inputs Outputs CLEAR A B Q Q LX X L H XH X L H XX L L H HL ↑ H ↓ H ↑ LH |
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