IDT74FCT257CTSOG

Overview

The IDT74FCT257CTSOG is an octal D-type flip-flop register manufactured by Renesas Electronics under the FCT logic series. It features a CMOS logic type and operates within a supply voltage range of 4.5 V to 5.5 V. The device provides a maximum clock frequency of 10 MHz with a propagation delay of 6.2 ns. It is housed in a SOIC-20 package and supports surface mount installation. The component functions as a single circuit register with low-level output current capability of 48 mA and high-level output current of -15 mA, operating between -40°C and +85°C.

Feature Summary

• Octal D-type flip-flop configuration for parallel data storage
• CMOS technology ensuring low power consumption and high noise immunity
• High-speed operation with defined propagation delay characteristics
• Robust output drive capabilities suitable for bus interfacing

Applications

• Parallel-to-serial data conversion circuits
• Buffering and latching digital signals in communication systems
• General-purpose data storage in embedded control systems

Procurement Notes

Verify the manufacturer designation carefully, as the part number prefix may vary between IDT and Renesas Electronics due to corporate acquisitions. Confirm the specific suffix 'CTSOG' matches the required package type (SOIC-20) and temperature range (-40°C to +85°C). Ensure compatibility with existing PCB footprints and verify RoHS compliance status through official documentation before procurement.

Selection Notes

Select this component when an octal register with moderate speed requirements is needed. The 10 MHz maximum clock frequency suits applications not requiring gigahertz-range performance. The SOIC-20 package offers a balance between pin count and board space. Consider the 4.5 V to 5.5 V operating range to ensure proper logic level interfacing with other 5V CMOS devices in the system design.

Part Context

This component belongs to the 74FCT family of high-speed CMOS logic devices originally developed by Integrated Device Technology (IDT) and now produced by Renesas Electronics. The FCT series is designed to bridge the performance gap between standard TTL and faster ECL technologies, offering improved switching speeds while maintaining TTL-compatible input levels and CMOS output drive strengths.

Replacement Considerations

Cross-reference with the base model 74FCT374 or 74FCT574 if pinout compatibility allows, though functional differences exist. Verify equivalent parts from other manufacturers such as ON Semiconductor or NXP that offer octal D-type registers in SOIC-20 packages with similar electrical specifications.