CD74HC4538PWR

Multivibrators Overview

The CD74HC4538PWR is a high-speed CMOS dual retriggerable precision monostable multivibrator manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and features Schmitt trigger inputs for noise immunity. The device provides two independent circuits in a 16-TSSOP package, with propagation delays specified at 250 ns, 50 ns, and 43 ns under varying conditions. Maximum power supply current is 8 uA, and output drive capability reaches 5.2 mA for both high and low states. Operating temperatures span from -55°C to +125°C.

Multivibrators Feature Summary

• Dual retriggerable precision monostable multivibrator architecture
• Schmitt trigger inputs on A and B channels for signal conditioning
• High-speed CMOS technology ensuring low power consumption
• Wide operating temperature range suitable for industrial applications

Multivibrators Applications

• Pulse generation and timing circuits
• Debouncing switches or contacts
• Frequency division and pulse width modulation
• Timing delay elements in digital systems

Multivibrators Procurement Notes

Verify the specific suffix 'G4' indicates RoHS compliance and manufacturing standards when sourcing. Confirm the TSSOP-16 package dimensions match PCB footprint requirements. Ensure the supplier provides official datasheets referencing the CD74HC4538 series specifications. Check for moisture sensitivity level classifications relevant to surface mount assembly processes.

Multivibrators Selection Notes

Select this component for designs requiring precise monostable triggering with retriggering capabilities. The HC logic family offers speed comparable to low-power Schottky TTL while maintaining CMOS noise immunity. Consider the 16-TSSOP package for space-constrained surface-mount layouts. Verify input voltage levels align with the system's logic thresholds across the full operating temperature range.

Multivibrators Part Context

This part belongs to the Texas Instruments CD74HC4538 series of dual monostable multivibrators. It is pin-compatible with other 74HC4538 variants but differs in packaging. The PWR suffix specifically denotes the TSSOP-16 surface-mount package type. It serves as a replacement for older through-hole SOIC versions like the CD74HC4538M where available.

Multivibrators Replacement Considerations

CD74HC4538MG4 (SOIC-16 variant)

Multivibrators FAQ

Can the CD74HC4538PWR be triggered multiple times during an output pulse?

Yes, the device is fully retriggerable, allowing the output pulse to be extended if a new trigger occurs before the initial pulse completes.

What is the function of the Clear input on this IC?

Taking the Clear input low resets the monostable multivibrator, forcing the output to its inactive state regardless of the current trigger condition.