SN74LS123NG4

Overview

The SN74LS123NG4 is a dual retriggerable monostable multivibrator from the Texas Instruments 74LS logic series. It features two independent circuits in a 14-pin PDIP package. The device operates within a supply voltage range of 4.75 V to 5.25 V, with a maximum static current of 12 mA. Key electrical parameters include a propagation delay of 56 ns at 5 V and output currents of -0.4 mA (high) and 8 mA (low). It supports an operating temperature range of 0°C to +70°C.

Feature Summary

• Dual retriggerable monostable multivibrator architecture
• Standard 74LS TTL logic compatibility
• Robust low-level output drive capability

Applications

• Timing pulse generation
• Frequency division
• Pulse width modulation

Procurement Notes

Verify the specific suffix 'NG4' against official manufacturer documentation to confirm lead-free compliance and RoHS status. Ensure the PDIP-14 package matches the target PCB footprint requirements. Cross-reference the part number with current distributor listings to confirm active manufacturing status and availability.

Selection Notes

Select this component for applications requiring precise timing intervals or pulse stretching using standard TTL logic levels. Consider the 74LS series power consumption characteristics relative to system requirements. Verify that the 14-pin through-hole package aligns with assembly capabilities and board design constraints.

Part Context

This part belongs to the SN74LS123 family of dual monostable multivibrators. The 'G4' suffix typically indicates environmental compliance features such as lead-free construction. It is designed for general-purpose digital timing applications within the broader 74-series logic ecosystem.

Replacement Considerations

SN74LS123N is a direct functional equivalent without the G4 suffix. SN74LS123DR offers the same functionality in a surface-mount SOIC package.