DM74LS123MX , Dual Retriggerable One-Shot With Clear and Complementary OutputsFeaturesThe DM74LS123 is a dual retriggerable monostable multi-
DM74LS123MX-DM74LS123SJX
Dual Retriggerable One-Shot With Clear and Complementary Outputs
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 Features The DM74LS123 is a dual retriggerable monostable multi-DC triggered from active-HIGH transition or active-LOW vibrator capable of generating output pulses from a few transition inputs nano-seconds to extremely long duration up to 100% dutyRetriggerable to 100% duty cycle cycle. Each device has three inputs permitting the choice of Compensated for V and temperature variations CC either leading edge or trailing edge triggering. Pin (A) is an Triggerable from CLEAR input active-LOW transition trigger input and pin (B) is an active- HIGH transition trigger input. The clear (CLR) input termi-DTL, TTL compatible nates the output pulse at a predetermined time indepen- Input clamp diodes 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. Ordering Code: 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 Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagram Function Table Inputs Outputs CLEAR A B Q Q LX X L H XH X L H XX L L H HL ↑ H ↓ H ↑ LH 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 © 2000 DS006386
