CD74HC423E

Data sheet acquired from Harris Semiconductor SCHS142F September 1997 - Revised October 2003 CD54/74HC123, CD54/74HCT123, CD74HC423, CD74HCT423 High-Speed CMOS Logic Dual Retriggerable Monostable Multivibrators with Resets [ /Title (CD74 HC123 , CD74 HCT12 3, CD74 HC423 , CD74 HCT42 3) /Subject (High Speed Features Overriding Reset Terminates Output Pulse Triggering From the Leading or Trailing Edge Q and Q Buffered Outputs Separate Resets Wide Range of Output-Pulse Widths Schmitt Trigger on Both A and B Inputs 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 Description The ’HC123, ’HCT123, CD74HC423 and CD74HCT423 are dual monostable multivibrators with resets. They are all retriggerable and differ only in that the 123 types can be triggered by a negative to positive reset pulse; whereas the 423 types do not have this feature. An external resistor (RX) and an external capacitor (CX) control the timing and the accuracy for the circuit. Adjust...