Data sheet acquired from Harris Semiconductor SCHS123E
June 1998 - Revised October 2003
CD54HC4538, CD74HC4538, CD54HCT...
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...