QS74FCT1280BTSO

Overview

The QS74FCT1280BTSO is a high-speed CMOS 9-bit parity generator and checker from the 74FCT series by Quality Semiconductor. It operates within a supply voltage range of 4.75 V to 5.25 V, with a nominal rating of 5 V. The device features inverted outputs and includes three enable inputs for flexible control. Designed for industrial temperature applications, it functions reliably between -40 °C and 85 °C. Packaged in a 24-pin SOIC (TSOP) format, this component supports bus interface operations with a load capacitance specification of 50 pF.

Feature Summary

• Implements 9-bit parity generation and checking logic functions
• Includes three independent enable inputs for signal control
• Provides inverted output polarity for specific circuit integration needs

Applications

• High-speed data bus parity verification systems
• Memory subsystem error detection circuits
• Digital communication interface integrity monitoring

Procurement Notes

Verify the package type matches the required board layout, as the suffix indicates a surface-mount SOIC/TSOP configuration. Confirm the industrial temperature grade (-40°C to 85°C) aligns with the operational environment. Ensure the 5V supply voltage compatibility exists within the target system design before procurement.

Selection Notes

Select this component when a dedicated 9-bit parity solution is required rather than using multiple smaller gates. The FCT technology offers faster switching speeds compared to standard LS or HC families. Consider the three-enable input feature if complex gating logic is needed to manage data flow during transmission cycles.

Part Context

This part belongs to the 74FCT family, which bridges the performance gap between TTL and CMOS technologies. Quality Semiconductor produces this variant specifically for industrial-grade reliability. The 1280 designation typically refers to the 9-bit parity function within the broader FCT logic portfolio.

Replacement Considerations

Check for direct equivalents such as the QS74FCT1280T if through-hole packaging is preferred instead of surface mount. Verify pinout compatibility with other 74FCT parity generators like the 74FCT280 if bit-width requirements differ.