74VHC221AMX

Overview

The onsemi 74VHC221AMX is a dual non-retriggerable monostable multivibrator in a 16-lead SOIC package. It operates within a supply voltage range of 2.0 V to 5.5 V and supports an operating temperature range of -40°C to +85°C. The device features a typical propagation delay of 8.1 ns at 5 V, with maximum quiescent current of 4 µA and active state current up to 975 µA. Output drive capability reaches ±8 mA, and it includes power-down protection on all inputs.

Feature Summary

• Dual non-retriggerable monostable multivibrator architecture
• High-speed CMOS operation with low power dissipation
• Power-down protection on all inputs for system interfacing
• Negative and positive transition triggered inputs

Applications

• Timing pulse generation
• Debouncing switches
• Pulse width modulation
• Frequency division

Procurement Notes

Verify the specific ordering suffix 'X' confirms tape and reel packaging. Confirm RoHS compliance status through official documentation. Check for obsolescence or lifecycle changes as this component may be discontinued by Fairchild Semiconductor. Ensure pinout compatibility if replacing existing designs.

Selection Notes

Select this component for applications requiring high-speed monostable timing with low power consumption. Verify that the external resistor and capacitor values fall within recommended limits for the chosen supply voltage. Consider the 16-lead SOIC package constraints for PCB layout and thermal management.

Part Context

This part belongs to the 74VHC221A series of dual monostable multivibrators. It is functionally compatible with the 74HC221A but offers higher speed performance. The device is fabricated using silicon gate CMOS technology, providing Bipolar Schottky TTL speeds with CMOS power levels.

Replacement Considerations

Direct substitutes include other 74VHC221 variants from different manufacturers. Verify pinout and electrical specifications match before replacement. Check for availability of equivalent packages if surface mount form factor is required.