Description
Retriggerable/Resettable Capability Trigger and Reset Propagation Delays Independent of RX, CX Triggering from the Leading or Trailing Edge Q and Q Buffered Outputs Available Separate Resets Wide Range of Output Pulse Widths Schmitt Trigger Input on A and B Inputs Retrigger Time is Independent of CX Fanout (Over Temperature Range) Wide Operating Temperature Range . . . -55oC to 125oC Balanced Propagation Delay and Transition Times Significant Power Reduction Compared to LSTTL Logic ICs HC Types - 2V to 6V Operation - High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V HCT Types - 4.5V to 5.5V Operation - Direct LSTTL Input Logic Compatibility, VIL= 0.8V (Max), VIH = 2V (Min) - CMOS Input Compatibility, Il ≤ 1µA at VOL, VOH The ’HC4538 and ’HCT4538 are dual retriggerable/resettable monostable precision multivibrators for fixed voltage timing applications. An external resistor (RX) and an external capacitor (CX) control the timing and the accuracy for the circuit.
