M74HC280B1R

Overview

The M74HC280B1R is a high-speed CMOS 9-bit parity generator manufactured by STMicroelectronics using silicon gate C2MOS technology. It features nine data inputs (A to I) and complementary odd/even parity outputs (ΣODD and ΣEVEN). The device operates within a supply voltage range of 2V to 6V, with a typical propagation delay of 22ns at 6V. Quiescent supply current is maximized at 4μA at 25°C. It provides symmetrical output impedance with minimum drive currents of 4mA for both high and low states.

Feature Summary

• Generates odd or even parity based on the count of high-level inputs across nine data lines
• Provides complementary outputs where one state remains high while the other stays low
• Word-length capability is expandable through cascading configurations
• All inputs include protection circuits against static discharge and transient excess voltage

Applications

• Data transmission systems requiring parity checking
• Digital communication interfaces needing error detection
• Computing hardware utilizing word-length expansion via cascading

Procurement Notes

Verify the specific ordering suffix B1R corresponds to the Plastic DIP-14 package configuration. Confirm that the component meets RoHS3 specifications as indicated in standard manufacturer documentation. Ensure compatibility with the required operating temperature range of -55°C to +125°C for your specific application environment before finalizing procurement.

Selection Notes

Select this component when a 9-bit parity generation function is required within a CMOS logic family. It is suitable for applications demanding wide operating voltage flexibility between 2V and 6V. Consider its pin and function compatibility with the standard 74 series 280 if migrating from legacy designs. Evaluate the need for cascading capabilities if more than nine bits of parity processing are necessary.

Part Context

This part belongs to the M74HC series of high-speed CMOS logic devices produced by STMicroelectronics. It utilizes C2MOS technology to achieve balanced propagation delays and low power dissipation. The device is designed to be pin and function compatible with industry-standard 74 series equivalents, facilitating integration into existing digital logic architectures.

Replacement Considerations

Direct substitutes must maintain 9-bit parity generation functionality and HC logic family characteristics. Verify pinout compatibility with the 14-pin DIP package. Ensure replacement components support the same 2V to 6V operating voltage range and meet the required noise immunity standards.