DM74S158N

Overview

The DM74S158N is a quad 1-of-2 line data selector/multiplexer in the 74S series, manufactured by onsemi. It features four independent multiplexers with inverted outputs to minimize propagation delay time. The device operates within a supply voltage range of 4.75V to 5.25V and supports a free air operating temperature from 0°C to +70°C. It utilizes buffered inputs and outputs for signal integrity. The component is housed in a 16-lead plastic dual-in-line package (PDIP) with a width of 0.300 inches.

Feature Summary

• Contains four independent 1-of-2 line data selectors
• Provides inverted output signals to reduce propagation delay
• Includes separate strobe input for data routing control
• Features buffered inputs and outputs

Applications

• Multiplexing dual data buses
• Generating four functions of two variables where one variable is common
• Expanding any data input point
• Source programmable counters

Procurement Notes

Verify that the specific procurement channel provides components sourced directly from authorized distributors or original manufacturers. Ensure the received units match the DM74S158N designation and PDIP-16 package format. Confirm compliance with RoHS standards if required by the application environment. Check for physical damage to the leads before integration into the circuit board assembly process.

Selection Notes

Select this component when an inverted output logic state is required for the specific design architecture. The 74S series offers faster switching speeds compared to standard TTL variants. Consider the power dissipation characteristics and thermal management requirements associated with bipolar logic families during system design. Verify compatibility with existing bus structures and voltage levels.

Part Context

This part belongs to the Fairchild Semiconductor DM74S157/DM74S158 family of quad multiplexers. The DM74S158N specifically denotes the version with inverted outputs, whereas the DM74S157N provides true data outputs. Both share identical pinouts and functional logic but differ in output polarity. The manufacturer is now onsemi following corporate acquisitions.

Replacement Considerations

The DM74S157N serves as a direct logical substitute if inverted outputs are not required. Other 74S series multiplexers may be compatible depending on specific electrical interface requirements and pinout configurations.