74HCT280DB,118

Overview

The Nexperia 74HCT280DB,118 is a 9-bit odd/even parity generator and checker belonging to the HCT logic family. It provides both even (PE) and odd (PO) parity outputs based on nine data inputs (I0 to I8). The device operates within a supply voltage range of 4.5 V to 5.5 V and supports an ambient temperature range from -40 °C to +125 °C. It utilizes a 14-lead SO plastic small outline package (SOT108-1). Propagation delay is specified at 63 ns maximum for the In-to-PE path and 68 ns maximum for the In-to-PO path at 4.5 V.

Feature Summary

• Generates or checks odd and even parity for nine data bits simultaneously
• Word length expansion capability through cascading parallel devices
• TTL-compatible input levels for interfacing with standard logic systems
• High noise immunity and low power CMOS dissipation characteristics

Applications

• Data transmission error detection circuits
• Memory system parity checking modules
• Communication interface signal integrity verification
• Digital logic word size expansion applications

Procurement Notes

Verify the specific ordering suffix 'DB' corresponds to the SO14 package variant during procurement. Confirm the manufacturer part number matches the official Nexperia database to ensure compatibility with design specifications. Check current product status as availability may vary by region. Ensure environmental compliance requirements align with project standards before finalizing orders.

Selection Notes

Select this component when TTL-level input compatibility is required for parity generation tasks. The wide operating temperature range suits industrial environments. Consider the propagation delay specifications against system timing constraints. Verify that the 14-lead package fits the available PCB footprint and assembly capabilities.

Part Context

This device is part of the broader 74HC/HCT series of logic integrated circuits manufactured by Nexperia. It serves as a specialized functional block for digital data processing and error checking. The HCT variant specifically bridges CMOS performance with TTL input thresholds, facilitating integration into mixed-logic designs common in embedded systems.

Replacement Considerations

The 74HCT280D is a direct equivalent offering identical functionality in the same SO14 package. Designers should verify pinout compatibility and electrical parameters match before substitution. Ensure any alternative source maintains the same temperature rating and package dimensions.