MC74AC258D

Overview

The MC74AC258D is a quad 2-input data selector/multiplexer manufactured by onsemi. It features high-speed silicon-gate CMOS technology and provides three-state outputs for bus-oriented applications. The device operates within a supply voltage range of 2.0 V to 6.0 V, ensuring compatibility with standard CMOS logic families. Packaged in a 16-pin SOIC format, it supports industrial temperature ranges from -40°C to +85°C. The component allows selection of a 4-bit nibble from either A or B inputs based on the select signal.

Feature Summary

• Provides four independent multiplexing channels with two inputs each
• Features three-state outputs that interface directly with CMOS, NMOS, and TTL systems
• Utilizes high-noise immunity characteristics inherent to CMOS devices
• Maintains low input current consumption for efficient power usage

Applications

• Bus-oriented memory addressing
• Data routing in communication systems
• Signal switching in industrial control panels
• Input selection for microprocessor systems

Procurement Notes

Verify the specific datasheet revision and package marking codes before procurement. Confirm RoHS compliance status as manufacturing processes may vary by production date. Ensure the supplier provides valid traceability documentation. Check for any obsolescence notices or lifecycle changes issued by onsemi. Validate that the received components match the specified 16-SOIC physical dimensions.

Selection Notes

Select this component when a quad multiplexer with three-state output capability is required. It is suitable for designs needing operation across a wide voltage range from 2V to 6V. Consider this part for applications requiring direct interfacing with legacy TTL or CMOS logic levels. Verify that the propagation delay specifications meet the timing requirements of the target system architecture.

Part Context

This part belongs to the 74AC series of logic integrated circuits, representing an advancement over earlier LS and HC families in terms of speed. The AC series utilizes silicon-gate CMOS technology to achieve higher performance while maintaining low power consumption. It serves as a standard solution for digital signal routing in mixed-voltage environments common in embedded electronics.

Replacement Considerations

KK74AC258D

FAQ

How does the Output Enable pin function?

A high level on the Output Enable pin switches the outputs into a high-impedance state, effectively disconnecting them from the bus.

What is the input compatibility of this device?

The device inputs are compatible with standard CMOS outputs and can interface with LS/ALS outputs when pull-up resistors are used.