CD74AC280E

Overview

The CD74AC280E is a single-circuit, 9-bit odd/even parity generator and checker belonging to the Texas Instruments 74AC logic family. It operates within a supply voltage range of 2.0 V to 6.0 V. The device features complementary outputs for both odd and even parity states. Key electrical specifications include a maximum propagation delay of 35 ns at 5.0 V and output drive currents of ±24 mA. It is housed in a standard 14-pin PDIP package and supports an operating temperature range from -55°C to +125°C.

Feature Summary

• Performs simultaneous generation and checking of odd and even parity for 9-bit data inputs
• Provides complementary outputs indicating valid odd or even parity status
• Supports high-speed digital signal processing with low propagation delay characteristics

Applications

• Data communication systems requiring error detection
• Memory modules utilizing parity checking protocols
• Industrial control systems ensuring data integrity

Procurement Notes

Verify the manufacturer designation on the component marking, as Harris Corporation was acquired by Lattice Semiconductor. Ensure the part number suffix matches the required package type and temperature grade. Confirm RoHS compliance status through official documentation before procurement.

Selection Notes

Select this component when a 9-bit parity solution is required within the AC logic family. Compare against HC or HCT series variants if lower speed or different voltage compatibility is needed. Verify that the 24 mA drive capability meets the load requirements of the destination circuitry.

Part Context

This component is part of the broader 74AC logic family, designed for high-speed applications. It shares functional similarities with other parity generators but offers specific performance metrics defined by the AC technology. The device serves as a fundamental building block for error detection circuits in digital systems.

Replacement Considerations

CD74ACT280E: Offers similar functionality with improved switching speeds and noise immunity due to ACT technology. CD74HC280E: Provides comparable performance with slightly higher propagation delays but compatible pinouts.