74HC123D-Q100,118

74HC123D-Q100,118 is a dual retriggerable monostable multivibrator with reset. The basic output pulse width is programmed by the selection of external components (REXT and CEXT). Once triggered this basic pulse width may be extended by retriggering either of the edge-triggered inputs. 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. This product has been qualified to the automotive electronics council (AEC) standard Q100 (Grade 1) and is suitable for use in automotive applications.

• Wide supply voltage range from 2.0V to 6.0V
• CMOS low power dissipation, high noise immunity
• Latch-up performance exceeds 100mA per JESD 78 Class II Level B
• DC triggered from active HIGH or active LOW inputs
• Retriggerable for very long pulses upto 100% duty factor
• Direct reset terminates output pulse, ESD protection
• Schmitt-trigger action on all inputs except for the reset input
• Supply current is 8μA max at (VI=VCC or GND;IO = 0A;VCC = 6V, 25°C)
• Propagation delay is 83ns typical at (VCC = 2V, 25°C)
• Operating temperature range from -40°C to +125°C, SO16 package

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