MC74F280D

Overview

The MC74F280D is a 9-bit parity generator and checker integrated circuit manufactured by onsemi. It belongs to the 74F logic series and operates within a supply voltage range of 4.5V to 5.5V. The device provides both odd and even parity outputs for nine data lines, facilitating flexible system integration. It features buffered inputs to reduce drive requirements and supports cascading for expanded word lengths. The component is housed in a 16-SOIC package and is designed for surface mount applications.

Feature Summary

• Generates or checks parity for nine data lines with dedicated odd and even output pins
• Features buffered inputs to lower drive requirements to one LS unit load
• Supports cascading to expand word length beyond nine bits
• Designed as a drop-in replacement for legacy MSI parity circuits

Applications

• Universal 9-bit parity generation and checking in digital systems
• Data integrity verification in memory interfaces
• Communication bus error detection circuits
• System upgrades involving legacy MSI parity logic substitution

Procurement Notes

Verify the specific suffix 'D' corresponds to the 16-SOIC package configuration in the official datasheet. Confirm the part status, as 74F series components may be obsolete or subject to last-time buy notices. Ensure the operating temperature range meets the application requirements before procurement.

Selection Notes

Select this component when a 9-bit parity solution is required within the 74F speed class. Compare propagation delay specifications against system timing constraints. Verify that the 16-pin SOIC footprint aligns with the PCB layout. Consider power dissipation characteristics relative to other logic families if thermal management is critical.

Part Context

This part is part of the 74F (Fast) logic family, known for high-speed performance compared to standard TTL. It serves as a functional equivalent to the SN74LS280 but utilizes Schottky technology for faster switching speeds. The device integrates parity logic into a single chip, simplifying design complexity for data transmission applications.

Replacement Considerations

The SN74LS280 is documented as a compatible alternative offering similar functionality. Verify pin compatibility and electrical parameters such as propagation delay and power consumption when substituting between the F and LS series variants.