SN74LVC1G123DCUR

• Single Retriggerable Monostable Multivibrator (one-shot) with Schmitt-Trigger Inputs
• 2 inputs, 1 output; Retriggering Restarts the Output Pulse
• 1.5 V to 5.5 V Supply range; 32 mA High- and Low-Level Output Drive
• 8.2 Ns Propagation delay; 20 uA Quiescent Current
• 8-Pin VSSOP, Gold Contact plating, 900 Um height, MSL 1
• -40 C to +125 C Operating range; Lead free, RoHS compliant, No REACH SVHC

The SN74LVC1G123DCUR is a Texas Instruments single retriggerable monostable multivibrator, or one-shot, with Schmitt-trigger inputs, supplied in an 8-pin VSSOP package. It takes two inputs and produces one output pulse whose width is set by an external timing network, and retriggering restarts the pulse rather than allowing it to expire. TI specifies the SN74LVC1G123DCUR over a 1.5 V to 5.5 V supply range with plus/minus 32 mA output drive, 8.2 ns propagation delay and 20 uA quiescent current. The device is rated -40 C to +125 C, is lead free and RoHS compliant with MSL 1 handling, and ships on tape and reel in 3, 000-piece quantities.

A retriggerable one-shot converts an edge into a fixed-width pulse, so it is used for pulse stretching, debouncing, watchdog and missing-pulse detection, timing delays and generating clean reset or strobe signals. Because the SN74LVC1G123DCUR retriggers, it will hold its output asserted as long as input events keep arriving, which is the standard way to build activity or heartbeat detectors. The Schmitt-trigger inputs let it accept slow or noisy edges directly from mechanical contacts, sensors or long cable runs without an external conditioning stage. Its single-gate VSSOP package and -40 C to +125 C rating suit space-constrained industrial, automotive, telecom and consumer boards where the function is added locally near the signal source.