MC74HC4538AFG

Multivibrators Overview

The MC74HC4538AFG is a dual precision monostable multivibrator manufactured by onsemi in the HC logic series. It operates within a supply voltage range of 3.0 to 6.0 V and supports an operating temperature from -55°C to +125°C. The device features two independent circuits with propagation delays up to 265 ns at 2.0 V and 53 ns at 4.5 V. Maximum quiescent current is 350 µA, while active state current reaches 800 µA. Output drive capability supports 10 LSTTL loads with sink/source currents of ±5.2 mA. It utilizes a SOEIAJ-16 package.

Multivibrators Feature Summary

• Retriggerable operation allows pulse extension when triggered during the timing cycle
• Conditioned trigger inputs eliminate restrictions on input rise and fall times
• Active low reset function forces outputs to defined states regardless of timing status
• Pulse width determined by external resistor and capacitor components

Multivibrators Applications

• Timing delay generation for digital systems
• Pulse width modulation circuitry
• One-shot selection and signal conditioning
• Clock recovery circuits

Multivibrators Procurement Notes

Verify component authenticity through official manufacturer channels or authorized distributors. Confirm RoHS compliance and Pb-Free packaging status as indicated by the suffix G. Ensure the SOEIAJ-16 package matches your PCB footprint requirements. Check for end-of-life status or obsolescence notices before finalizing procurement plans.

Multivibrators Selection Notes

Select this component for applications requiring precise monostable timing with CMOS compatibility. Verify that external timing components are suitable for the desired pulse width range. Ensure supply voltage remains within the 3.0 V to 6.0 V operational limits. Consider thermal dissipation requirements if operating at maximum ambient temperatures.

Multivibrators Part Context

This device belongs to the MC74HC4538A family of dual precision monostable multivibrators. It shares pinout compatibility with older MC14538B designs. The HC series offers speeds comparable to low power Schottky TTL while maintaining CMOS noise immunity. The F suffix denotes the specific SOEIAJ-16 surface mount package variant.

Multivibrators Replacement Considerations

MC74HC4538ADG (SOIC-16) and MC74HC4538ADTR2 (TSSOP-16) are compatible variants within the same family offering identical electrical characteristics.