74VHC221AFT

Overview

The Toshiba 74VHC221AFT is a single-channel non-retriggerable monostable multivibrator fabricated using silicon gate C2MOS technology. It operates within a supply voltage range of 2.0 V to 5.5 V and features Schmitt trigger inputs for slow rise/fall time signals. The output pulse width is determined by an external resistor (RX) and capacitor (CX). Key electrical parameters include a typical propagation delay of 8.1 ns at 5 V, a maximum quiescent supply current of 4.0 µA, and balanced propagation delays. It supports an operating temperature range from -40 °C to +125 °C.

Feature Summary

• Non-retriggerable monostable operation with Schmitt trigger inputs
• Wide operating voltage range from 2.0 V to 5.5 V
• Power-down protection on all inputs
• Balanced propagation delays

Applications

• Timing generation circuits
• Pulse width modulation
• Debouncing switches
• Clock frequency division

Procurement Notes

Verify the specific part number against the official Toshiba datasheet to ensure correct logic family and package type. Confirm AEC-Q100 compliance requirements if automotive applications are intended. Check RoHS status and environmental declarations prior to ordering. Ensure design accounts for derating factors at elevated temperatures.

Selection Notes

Select this component when a non-retriggerable monostable function is required in a CMOS logic environment. It is suitable for interfacing between 3 V and 5 V systems due to its wide voltage range. Consider the external RX/CX component values for precise timing control. Verify input signal characteristics match the Schmitt trigger thresholds.

Part Context

This device belongs to the 74VHC series of high-speed CMOS digital integrated circuits. It is pin and function compatible with standard 74HC221 types. The 'AFT' suffix indicates the TSSOP-16B surface-mount package. It is manufactured by Toshiba Semiconductor and Storage Corporation.

Replacement Considerations

Pin-compatible alternatives include the 74HC221 series devices from various manufacturers. Ensure replacement parts meet the same voltage and temperature specifications.