QS74FCT1280ATSO

Overview

The QS74FCT1280ATSO is a high-speed CMOS 9-bit parity generator and checker manufactured by Quality Semiconductor. It operates within the FCT series, utilizing complementary output structures in a PDSO20 package. The device supports TTL input and output levels, ensuring compatibility with standard logic families. Designed for applications requiring high-speed data integrity verification, it integrates parity generation and checking functions into a single component, offering efficient signal processing for digital systems.

Feature Summary

• Integrates both parity generation and checking capabilities within a single 9-bit architecture
• Utilizes high-speed CMOS technology for enhanced performance and lower power consumption
• Features complementary outputs to support robust signal transmission
• Maintains TTL-compatible input and output voltage levels for broad system integration

Applications

• High-speed data bus integrity monitoring
• Digital communication systems requiring error detection
• Memory interface circuits for parity verification
• Computer peripheral interfaces demanding reliable data transfer

Procurement Notes

Verify the manufacturer designation as Quality Semiconductor or Rochester Electronics LLC, as distribution channels may vary. Confirm the RoHS non-compliant status if environmental regulations are a constraint. Ensure the PDSO20 package type matches your PCB footprint requirements. Cross-reference the datasheet version to confirm pinout consistency, as legacy components may have multiple revisions. Validate that the TTL level compatibility meets your specific circuit design needs before procurement.

Selection Notes

Select this component when a combined parity generator and checker is required for 9-bit data paths. The FCT series offers a balance of speed and drive capability suitable for moderate fan-out applications. Consider the complementary output structure if differential signaling or noise immunity is prioritized. Ensure the operating voltage range aligns with your system's supply rails. This part is suitable for replacing older bipolar equivalents where lower power consumption is desired without sacrificing speed.

Part Context

This component belongs to the FCT (Fast CMOS) series, which bridges the performance gap between standard TTL and advanced CMOS technologies. Manufactured originally by Pericom Semiconductor and later acquired by Diodes Incorporated, the series is now distributed by entities like Quality Semiconductor. The QS74FCT1280ATSO specifically addresses data integrity needs in digital logic designs, providing a compact solution for parity operations in 20-pin surface-mount packages.

Replacement Considerations

Check for pin-compatible alternatives within the same FCT family, such as other 9-bit parity devices from Quality Semiconductor or Diodes Incorporated. Verify electrical characteristics match, particularly propagation delay and output drive strength. Ensure the package outline dimensions are identical for direct board replacement. Consult official substitution guides from the current distributor for validated cross-references.