DM74ALS258N

Overview

The DM74ALS258N is a 3-STATE Quad 1-of-2-Line Data Selector/Multiplexer manufactured by onsemi. It operates within a supply voltage range of 4.5V to 5.5V and supports a free air operating temperature from 0°C to +70°C. The device features four independent multiplexers with inverted outputs, utilizing Advanced oxide-isolated, ion-implanted Schottky TTL process technology. It is housed in a 16-Lead Plastic Dual-In-Line Package (PDIP).

Feature Summary

• Provides full on-chip data selection for four 3-STATE outputs that interface directly with bus-organized system data lines.
• Routes a 4-bit word selected from one of two sources to the four outputs while presenting inverted data to minimize propagation delay time.
• Functionally and pin-for-pin compatible with Schottky and low power Schottky TTL counterparts.

Applications

• High-performance memory-decoding applications requiring short propagation delay times.
• Data-routing applications involving bus-organized systems.
• Multiplexing dual data buses or expanding any data input point.

Procurement Notes

Verify the component's authenticity against official datasheets before integration. Confirm package dimensions match the 16-Lead PDIP specification. Ensure environmental conditions remain within the specified operating temperature range. Check for functional compatibility with existing Schottky TTL designs if replacing legacy components.

Selection Notes

Select this component when inverted data presentation is required to optimize propagation delay in high-speed logic circuits. It serves as a direct replacement for standard Schottky and Low Power Schottky TTL multiplexers due to its pin-compatible design. Verify that the 3-STATE output capability aligns with the target bus architecture requirements.

Part Context

This device belongs to the 74ALS logic family, which utilizes Advanced Schottky technology for improved AC performance over standard Schottky and Low Power Schottky counterparts. The specific model DM74ALS258 provides inverted outputs, distinguishing it from the non-inverted DM74ALS257 variant within the same series.

Replacement Considerations

The DM74ALS258N is functionally and pin-for-pin compatible with Schottky and Low Power Schottky TTL counterparts. Direct replacements include devices from the standard 74S and 74LS families that share identical pin configurations and logical functions.