MC74HC4538AFR1

Multivibrators Overview

The MC74HC4538AFR1 is a dual precision monostable multivibrator from the HC logic series, manufactured by onsemi. It operates within a supply voltage range of 3.0 V to 6.0 V and features two independent elements per chip. The device supports surface-mount installation in a 16-SOIC package with a width of 0.209 inches (5.30 mm). Key electrical parameters include a maximum power supply current of 130 uA, low-level output current of 5.2 mA, and high-level output current of -5.2 mA. Propagation delays are specified at 195 ns, 39 ns, and 33 ns. It functions reliably across an operating temperature range of -55°C to +125°C.

Multivibrators Feature Summary

• Retriggerable and resettable operation allows for flexible pulse generation and control.
• Conditioned trigger inputs eliminate restrictions on input rise and fall times.
• CMOS-compatible inputs with pullup resistors enable LSTTL compatibility.
• Outputs directly interface with CMOS, NMOS, and TTL loads.

Multivibrators Applications

• Pulse timing circuits requiring precise duration control
• Debouncing switches or contacts
• Frequency division and pulse stretching

Multivibrators Procurement Notes

Verify component authenticity through authorized channels due to end-of-life status. Confirm RoHS compliance and moisture sensitivity level (MSL 3) for storage and handling requirements. Ensure the SOIC-16 package dimensions match PCB footprint specifications. Validate that the operating temperature range meets environmental design constraints before integration.

Multivibrators Selection Notes

Select this component when dual precision monostable functionality is required in a compact SOIC package. Consider the wide operating temperature range for industrial applications. Verify that the 3V to 6V supply voltage aligns with system power rails. Check propagation delay specifications against timing requirements for signal processing tasks.

Multivibrators Part Context

This part belongs to the MC74HC4538A family of dual precision monostable multivibrators. It shares pinout compatibility with the MC14538B. The device utilizes CMOS technology to provide high noise immunity and low input current characteristics typical of the HC logic series.

Multivibrators Replacement Considerations

Cross-reference with MM74HC4538SJX for similar dual monostable functionality, noting differences in package type and operating temperature range. Verify pinout compatibility and electrical specifications before substitution.