74HCT123PW,118

74HCT123PW,118 is a dual retriggerable monostable multivibrator with reset. The basic output pulse width is programmed by selection of external components (REXT and CEXT). Once triggered this basic pulse width may be extended by retriggering either of the edge triggered inputs (n active-low A or nB). By repeating this process, the output pulse period (nQ = HIGH, n active-low Q = LOW) can be made as long as desired. Alternatively, an output delay can be terminated at any time by a LOW-going edge on input n active-low RD. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC. Schmitt-trigger action in the n active-low A and nB inputs, makes the circuit highly tolerant to slower input rise and fall times. It features ESD protection (HBM JESD22-A114F exceeds 2000V, MM JESD22-A115-A exceeds 200V).

• Wide supply voltage range from 4.5V to 5.5V
• CMOS low power dissipation, high noise immunity
• Latch-up performance exceeds 100mA per JESD 78 Class II Level B
• Complies with JEDEC standards (JESD8C (2.7V to 3.6V), JESD7A (2V to 6V)
• TTL input level, DC triggered from active HIGH or active LOW inputs
• Retriggerable for very long pulses upto 100% duty factor
• Schmitt-trigger action on all inputs except for the reset input
• Input leakage current is ±0.1μA maximum at (VI = VCC or GND; VCC = 5.5V, +25°C)
• Supply current is 8μA maximum at (VI=VCC or GND;IO = 0A;VCC = 5.5V, 25°C)
• Operating temperature range from -40°C to +125°C, TSSOP16 package

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