SN74LS423D

Overview

The SN74LS423D is a dual 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 maximum propagation delay of 56 ns. The device draws a maximum power supply current of 12 mA and provides a low-level output current of 8 mA with a high-level output current of -400 uA. Designed for surface-mount applications, it is housed in a 16-pin SOIC-Narrow package and supports an operating temperature range from 0°C to +70°C.

Feature Summary

• Dual independent retriggerable monostable multivibrator circuits integrated into a single package
• Compatible with standard TTL logic families for direct interfacing
• Surface-mount construction utilizing a narrow SOIC-16 footprint

Applications

• Pulse width modulation signal generation
• Timing delay circuit implementation
• Frequency division and pulse shaping

Procurement Notes

Verify the specific ordering suffix against the manufacturer datasheet to confirm package type and temperature grade. Ensure the component meets RoHS compliance requirements for your assembly process. Confirm availability status directly with authorized distributors as inventory levels fluctuate. Validate that the supply voltage parameters align with your system design constraints before procurement.

Selection Notes

Select this component when dual retriggerable timing functions are required in a compact surface-mount form factor. The LS logic family offers compatibility with existing TTL designs while providing moderate speed performance. Consider the 56 ns propagation delay and 12 mA current consumption when evaluating power budgets and signal integrity requirements for the target application environment.

Part Context

This part belongs to the SN74LS423 family of monostable multivibrators manufactured by Texas Instruments. It is designed for general-purpose timing applications requiring reliable pulse generation. The device utilizes Low-power Schottky (LS) technology to balance power consumption with switching speed, making it suitable for commercial electronic systems operating under standard TTL voltage levels.

Replacement Considerations

Cross-reference with other SN74LS423 variants or equivalent monostable multivibrators from different manufacturers only if pinout and electrical specifications match exactly. Verify package dimensions and thermal characteristics to ensure mechanical compatibility during replacement.