M74HC4538TTR

Multivibrators Overview

The M74HC4538TTR is a dual retriggerable precision monostable multivibrator from the STMicroelectronics 74HC series, fabricated using silicon gate C2MOS technology. It operates within a supply voltage range of 2 V to 6 V and features Schmitt trigger inputs for high noise immunity. The device provides two independent circuits with both positive (B) and negative (A) edge-triggered inputs, alongside an active-low direct reset input (CD). It delivers symmetrical output impedance and balanced propagation delays, with typical propagation delay at 25 ns at 6 V.

Multivibrators Feature Summary

• Dual retriggerable precision monostable multivibrator architecture
• Schmitt trigger inputs on A and B channels for noise immunity
• Active-low direct reset capability via CD input
• Wide operating voltage range from 2 V to 6 V

Multivibrators Applications

• Pulse generation and timing circuits
• Debouncing switches or contacts
• Frequency division and pulse width modulation
• Timing delay applications

Multivibrators Procurement Notes

Verify component authenticity through authorized distributors as the part number indicates end-of-life status. Confirm package specifications match the TSSOP-16 footprint requirements. Ensure external resistor and capacitor values adhere to datasheet leakage limits to maintain timing accuracy. Validate RoHS compliance documentation prior to integration into production assemblies.

Multivibrators Selection Notes

Select this component when precise monostable timing with retriggering capability is required in CMOS logic environments. Consider the wide temperature range and low standby current for power-sensitive designs. Verify that the external RC network components support the desired pulse width stability across the full operating voltage and temperature spectrum.

Multivibrators Part Context

This device belongs to the M74HC4538 family of high-speed CMOS logic ICs. It is functionally compatible with standard 74HC4538 equivalents from other manufacturers. The TTR suffix denotes the Tape and Reel packaging format suitable for automated surface-mount assembly processes.

Multivibrators Replacement Considerations

Direct substitutes include Nexperia 74HC4538D and Texas Instruments CD74HC4538 variants. Verify pin compatibility and electrical characteristics before substitution.