CY74FCT257CTQCT-CY

Overview

The CY74FCT257CTQCT-CY is an octal transparent latch manufactured by Cypress Semiconductor Corp, belonging to the FCT logic series. It features eight D-type inputs and corresponding outputs with three-state capability. The device operates within a supply voltage range of 4.75 V to 5.25 V. It utilizes a 20-lead SSOP package suitable for surface mount technology. The component supports a wide operating temperature range from -40°C to +85°C. Propagation delay is specified at 4.7 ns at 5 V. Low-level output current reaches 32 mA, while high-level output current is -15 mA. Quiescent current is typically 200 uA.

Feature Summary

• Provides eight-bit data storage with transparent latch functionality controlled by an enable signal.
• Features three-state outputs allowing direct connection to bus structures without external buffers.
• Designed for CMOS compatibility with TTL-compatible input levels for system integration.

Applications

• High-performance register files in digital systems
• Bus-oriented memory mapping applications
• Temporary data storage in communication interfaces

Procurement Notes

Verify the specific suffix 'CY' against official Cypress or Texas Instruments documentation to confirm if it denotes a specific tape-and-reel configuration, environmental compliance level, or packaging variant distinct from standard commercial grades. Confirm RoHS status and moisture sensitivity classification prior to procurement to ensure compatibility with assembly processes.

Selection Notes

Select this component when an octal latch with three-state output control is required for bus-driven architectures. Ensure the design accommodates the 5V nominal supply voltage and the specific pinout of the 20-lead SSOP package. Verify that the propagation delay characteristics meet the timing requirements of the target clock domain.

Part Context

This part belongs to the FCT (Fast CMOS Technology) family, which bridges the performance gap between standard CMOS and low-power Schottky TTL. The CY74FCT257 variant specifically provides octal latching capabilities. Cypress Semiconductor was acquired by Infineon Technologies, and legacy parts may now be supported under different corporate branding structures.

Replacement Considerations

Check for CY74FCT257CTSOCT as a potential alternative in SOIC-20 packaging. Verify functional equivalence with other FCT-series octal latches from Texas Instruments or Microchip Technology, ensuring pin compatibility and electrical specifications match.