MC74HC4538A Dual Precision Monostable Multivibrator (Retriggerable, Resettable) The MC74HC4538A is identical in pinout to the MC14538B. The device inputs are compatible with standard CMOS outputs with MC74HC4538A FUNCTION TABLE GND 1 16 V CC C 1/R 1 2 15 GND Inputs Outputs X X Reset A B Q Q RESET 1 3 14 C 2/R 2 X X A1 4 13 RESET 2 HH HL B1 5 12 A2 H X L Not Triggered Q1 6 11 B2 H H X Not Triggered Q1 7 10 Q2 H L,H, H Not Triggered GND 8 9 Q2 H L L,H, Not Triggered LX X L H X X Not Triggered Figure 1. Pin Assignment C1R 1 X X V CC 12 PIN 16 = V CC PIN 8 = GND 6 4 Q1 A1 R AND C ARE EXTERNAL COMPONENTS TRIGGER X X 5 7 PIN 1 AND PIN 15 MUST BE HARD WIRED TO GND INPUTS B1 Q1 3 RESET 1 C2R 2 X X V CC 15 14 10 12 Q2 A2 TRIGGER 11 9 INPUTS B2 Q2 13 RESET 2 Figure 2. Logic Diagram ORDERING INFORMATION Device Package Shipping MC74HC4538ANG PDIP16 500 Units / Rail (Pb Free) MC74HC4538ADG SOIC16 48 Units / Rail (Pb Free) MC74HC4538ADR2G SOIC16 2500 / Tape & Reel (Pb Free) MC74HC4538ADTR2G TSSOP16 2500 / Tape & Reel (Pb Free) NLV74HC4538ADR2G* SOIC16 2500 / Tape & Reel (Pb Free) NLVHC4538ADTR2G* TSSOP16 2500 / Tape & Reel (Pb Free) For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. *NLV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements AECQ100 Qualified and PPAP Capable