SN74LS122D

Overview

The SN74LS122D is a monostable multivibrator from the Texas Instruments 74LS series, manufactured by onsemi. It features a single circuit in a 14-SOIC package with an internal timing resistor. Key electrical parameters include a propagation delay of 28 ns, supply voltage range of 4.75 V to 5.25 V, and output currents of 400 µA (high) and 8 mA (low). Operating temperature spans 0°C to 70°C.

Feature Summary

• Features an internal timing resistor allowing operation with only an external capacitor for pulse width programming.
• Supports retriggering via gated low-level-active or high-level-active inputs to extend output pulses.
• Includes an overriding clear function that terminates the output pulse immediately.

Applications

• Pulse generation circuits
• Timing delays
• Debouncing switches

Procurement Notes

Verify component authenticity through authorized distributors. Confirm RoHS3 compliance and moisture sensitivity level MSL 1. Check datasheet revisions for pinout consistency. Ensure storage conditions prevent electrostatic discharge damage during handling.

Selection Notes

Select this component when a single-channel monostable multivibrator with internal timing resistance is required. Verify compatibility with 5V logic systems and surface-mount assembly constraints. Consider thermal management within the specified operating temperature range.

Part Context

Part of the 74LS family of low-power Schottky logic devices. Designed for digital applications requiring precise timing control. Compatible with standard TTL logic levels. Manufactured using silicon gate C2MOS technology for improved performance.

Replacement Considerations

• SN74LS122DR