DM74LS221SJ

Multivibrators Overview

The DM74LS221SJ is a dual non-retriggerable one-shot monostable multivibrator from the Fairchild Semiconductor 74LS series. It features Schmitt-trigger inputs for noise immunity and provides both clear and complementary outputs. The device operates within a supply voltage range of 4.75 V to 5.25 V and supports a propagation delay of 65 ns. It is housed in a 16-pin plastic DIP package with a commercial temperature rating of 0°C to 70°C.

Multivibrators Feature Summary

• Dual highly stable one-shot configuration with overriding clear functionality
• Schmitt-trigger inputs ensure clean switching and noise rejection
• Provides both clear and complementary output signals for flexible logic interfacing

Multivibrators Applications

• Timing pulse generation circuits
• Debouncing switches or relays
• Frequency division applications

Multivibrators Procurement Notes

Verify component authenticity through official manufacturer channels or authorized distributors, as this part may be discontinued. Confirm package integrity and pin alignment against the 16-PDIP specification. Ensure the operating environment remains within the specified commercial temperature limits to maintain performance reliability.

Multivibrators Selection Notes

Select this component when a dual monostable circuit with Schmitt-trigger inputs is required. It serves as a direct pin-compatible alternative to the SN74LS123. Consider the 65 ns propagation delay and TTL logic levels when designing compatible digital systems.

Multivibrators Part Context

This component belongs to the standard 74LS (Low-power Schottky) logic family, known for balanced speed and power consumption. The DM74LS221SJ specifically implements dual monostable multivibrators, distinct from other 74-series logic gates or counters. Its design focuses on stability and noise immunity via Schmitt triggers.

Multivibrators Replacement Considerations

SN74LS221N is a confirmed direct substitute with identical pinout and functionality.