SN74LS423NG4

Overview

The SN74LS423NG4 is a dual retriggerable monostable multivibrator manufactured by Texas Instruments. It operates within the LS logic series and contains two independent circuits per package. The device supports a supply voltage range of 4.75 V to 5.25 V. It features a propagation delay of 56 ns and draws a maximum supply current of 12 mA. Output capabilities include an 8 mA low-level sink current and a -400 uA high-level source current. It functions reliably across an operating temperature range of 0°C to +70°C.

Feature Summary

• Dual retriggerable monostable multivibrator architecture
• DC-triggered operation for precise timing control
• Standard LS logic family compatibility

Applications

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

Procurement Notes

Verify the specific suffix 'G4' against the manufacturer's official documentation to confirm compliance with RoHS directives and lead-free manufacturing standards. Ensure the ordering part number matches the exact package type required for your PCB layout, as variations exist between DIP and SOIC formats within this product line.

Selection Notes

Select this component when dual independent timing channels are required in a compact footprint. It serves as a functional alternative to similar LS-series devices like the SN74LS123, though trigger mechanisms differ. Verify that the DC-trigger requirement aligns with your system's signal conditioning needs before finalizing the design.

Part Context

This component belongs to the Texas Instruments SN74LS423 family of monostable multivibrators. It is designed for general-purpose digital timing applications requiring reliable pulse generation. The device integrates standard TTL-compatible inputs and outputs, facilitating easy integration into existing 74LS logic systems without additional level shifting.

Replacement Considerations

SN74LS423N

FAQ

How does the triggering mechanism of the SN74LS423 differ from the SN74LS123?

The SN74LS423 utilizes DC triggering, whereas the SN74LS123 typically relies on edge triggering. Additionally, the SN74LS423 cannot be triggered via its clear input.

What is the maximum supply current consumption for this device?

The maximum supply current is specified as 12 mA under standard operating conditions.