MC74F280DR2

Overview

The MC74F280DR2 is a Universal 9-Bit Parity Generator/Checker manufactured by onsemi. It features odd and even outputs to facilitate either parity type. The device is designed without an expander input implementation, with the corresponding function provided by an input at Pin 4 and the absence of any connection at Pin 3. This design permits substitution for the LS180, resulting in improved performance. It has buffered inputs to lower drive requirements to one LS unit load. Typical data-to-output delay is 33 ns, and typical power dissipation is 80 mW.

Feature Summary

• Generates either odd or even parity for nine data lines
• Cascadable for n-bits
• Can be used to upgrade systems using MSI parity circuits

Applications

• Universal 9-bit parity generation and checking
• System upgrades involving MSI parity circuits

Procurement Notes

Verify component authenticity and datasheet alignment when sourcing this legacy part. Confirm RoHS status and environmental compliance details as specifications may vary by production batch. Ensure pinout compatibility with existing designs referencing the LS180 standard before integration.

Selection Notes

Select this component for applications requiring 9-bit parity processing with buffered inputs. Consider its capability to substitute for LS180 devices where improved performance is desired. Evaluate cascading options for expanding word length beyond nine bits in complex logic designs.

Part Context

This part belongs to the 74LS series of low-power Schottky logic integrated circuits produced by onsemi. It functions as a universal parity generator and checker, providing both odd and even parity outputs. The device is designed to interface with standard LS logic families while offering enhanced performance characteristics over older equivalents.

Replacement Considerations

MC74F280DWR2G