CD74HCT4538

Data sheet acquired from Harris Semiconductor SCHS123E June 1998 - Revised October 2003 CD54HC4538, CD74HC4538, CD54HCT4538, CD74HCT4538 High-Speed CMOS Logic Dual Retriggerable Precision Monostable Multivibrator [ /Title (CD54 HC453 8, CD74 HC453 8, CD74 HCT45 38) /Subject (High Speed CMOS Logic Features 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) - Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads - Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads 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. Adjustment of RX and CX provides a wi...