DM74AS280MX

Overview

The DM74AS280MX is a parity generator and checker integrated circuit manufactured by onsemi (formerly Fairchild Semiconductor). It operates within the 74AS logic series and supports 9-bit data processing. The device functions as both a parity generator and checker, utilizing a single package configuration. It is housed in a 14-SOIC surface-mount package with a width of 3.90mm. Electrical specifications include a supply voltage range of 4.5 V to 5.5 V and an operating temperature range of 0°C to 70°C. Output drive capabilities are specified at 2mA for high state and 20mA for low state.

Feature Summary

• Provides combined parity generation and checking functionality for digital systems
• Supports 9-bit data word processing within a single integrated circuit
• Features advanced Schottky TTL technology for improved switching performance

Applications

• Digital communication systems requiring error detection
• Memory interface circuits needing parity verification
• Microprocessor-based systems implementing data integrity checks

Procurement Notes

Verify component authenticity through authorized distribution channels due to discontinued status. Confirm package marking and date codes against manufacturer records. Ensure compatibility with existing PCB footprints for 14-SOIC packages. Validate electrical parameters against original datasheet specifications before integration into final designs.

Selection Notes

Select this component when 9-bit parity handling is required in space-constrained applications. Consider the 14-SOIC package dimensions for board layout constraints. Evaluate the 74AS series speed-power trade-offs against system requirements. Verify thermal management needs within the specified operating temperature range.

Part Context

This part belongs to the 74AS (Advanced Schottky) logic family, known for high-speed operation. The DM prefix indicates industrial temperature grade variants from Fairchild/ON Semiconductor. The 74AS280 base number defines the specific parity function architecture shared across multiple package options.

Replacement Considerations

SN74AS280NSR from Texas Instruments is documented as a similar replacement option.