74VHC221AMTC

Overview

The onsemi 74VHC221AMTC is a dual non-retriggerable monostable multivibrator in a 16-lead TSSOP package. It operates within a supply voltage range of 2.0 V to 5.5 V and supports an operating temperature from -40°C to +85°C. Typical propagation delay is 8.1 ns at 5 V with a 15 pF load, rising to 16.0 ns max at 50 pF. Quiescent current is 4 µA maximum at 25°C, while active state current reaches 975 µA maximum at 5.5 V. Output drive capability is ±8 mA.

Feature Summary

• Dual independent non-retriggerable monostable circuits
• Negative and positive transition triggered inputs
• Active state power down protection on all inputs
• Pin and function compatible with 74HC221A

Applications

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

Procurement Notes

Verify the specific ordering suffix 'MTC' corresponds to the 16-lead Thin Shrink Small Outline Package (TSSOP) JEDEC MO-153 standard. Confirm that the component status aligns with current production availability, as datasheets may indicate legacy or obsolete status depending on the manufacturing date. Ensure input pins are not left floating during operation.

Selection Notes

Select this device when dual monostable functionality is required in a compact surface-mount footprint. The VHC series offers high-speed performance comparable to Bipolar Schottky TTL while maintaining low CMOS power dissipation. Verify external resistor and capacitor limits against the recommended operating conditions for the target supply voltage.

Part Context

This component belongs to the 74VHC logic family, representing advanced high-speed CMOS technology. It serves as a direct pin-compatible upgrade for older 74HC221A designs, providing improved switching speeds without altering board layout constraints. The TSSOP package facilitates automated assembly in space-constrained electronic systems.

Replacement Considerations

SN74LV221ANSR by Texas Instruments is listed as a direct substitute.