SN74LS122NG4

Overview

The SN74LS122NG4 is a single retriggerable monostable multivibrator from the Texas Instruments SN74LS series. It operates within a supply voltage range of 4.75 V to 5.25 V and features a propagation delay of 56 ns. The device provides a low-level output current of 8 mA and a high-level output current of -400 uA. It functions in an ambient temperature range of 0°C to +70°C and is housed in a 14-pin DIP package.

Feature Summary

• Retriggerable monostable operation allows pulse width extension upon receiving subsequent trigger signals during the timing interval.
• Includes dedicated clear inputs for asynchronous reset of the output state independent of triggering events.

Applications

• Pulse width modulation generation
• Timing delay circuits
• Frequency division

Procurement Notes

Verify the specific suffix 'NG4' against the manufacturer's official documentation to confirm compliance with RoHS directives and material composition requirements. Ensure the procurement channel sources genuine components matching the SN74LS logic family specifications and physical package dimensions.

Selection Notes

Select this component when a single-channel retriggerable monostable function is required within standard TTL logic families. Consider the 14-pin DIP form factor for through-hole mounting applications. Evaluate the 56 ns propagation delay and 8 mA sink capability against system timing and load drive requirements.

Part Context

This part belongs to the SN74LS (Low-power Schottky) logic family, designed for reduced power consumption compared to standard LS logic while maintaining compatible speed. The SN74LS122 variant specifically provides one retriggerable monostable circuit per package, distinguishing it from non-retriggerable or dual-channel counterparts.

Replacement Considerations

SN74LS122N is the direct equivalent without the environmental suffix. SN74LS123D offers similar functionality in a surface-mount package. Verify pinout compatibility before substituting with other monostable multivibrators.