CD74HCT4538MT

Multivibrators Overview

The CD74HCT4538MT is a dual retriggerable precision monostable multivibrator manufactured by Texas Instruments. It belongs to the HCT logic series, utilizing advanced silicon-gate CMOS technology. The device operates within a supply voltage range of 2 V to 6 V and features Schmitt trigger inputs for noise immunity. It provides two independent circuits per package, with a maximum propagation delay of 55 ns at 4.5 V. The component supports surface-mount installation in a 16-SOIC package and functions reliably across an extended temperature range from -55°C to +125°C.

Multivibrators Feature Summary

• Dual retriggerable precision monostable multivibrator configuration
• Schmitt trigger inputs on A and B channels for enhanced noise immunity
• CMOS technology ensuring low power consumption and high noise immunity
• Wide operating supply voltage range supporting diverse system requirements

Multivibrators Applications

• Pulse generation and timing circuits
• Debouncing switches and contacts
• Frequency division applications
• Timing delays in digital systems

Multivibrators Procurement Notes

Verify the specific suffix 'MT' indicates tape-and-reel packaging when sourcing. Confirm the HCT series designation ensures compatibility with TTL logic levels. Check manufacturer documentation for any product change notices or end-of-life declarations affecting long-term availability. Ensure the 16-SOIC footprint matches the target PCB design constraints.

Multivibrators Selection Notes

Select this component when precise monostable timing is required with Schmitt trigger input conditioning. The HCT series is suitable for systems interfacing with 5V TTL logic standards. Consider the 16-SOIC package for surface-mount assembly processes. Evaluate the 55 ns propagation delay against system speed requirements to ensure adequate timing margins.

Multivibrators Part Context

This part is part of the Texas Instruments 74HC(H)T4538 family of dual monostable multivibrators. It shares functional similarities with other variants like the CD74HC4538 but differs in input threshold characteristics due to the HCT logic level compatibility. The device serves as a standard solution for generating single pulses of adjustable width based on external resistor and capacitor values.

Multivibrators Replacement Considerations

CD74HC4538MT: HC series variant with different input thresholds. CD74HCT4538M: Tube packaged version of the same electrical specification.