STK17TA8-RF45TR

Overview

The STK17TA8-RF45TR is a non-volatile SRAM component manufactured by Simtek, featuring a memory density of 128K x 8 bits. It operates with an asynchronous access time of 45 ns and utilizes CMOS technology. The device is housed in a plastic surface-mount package, specifically identified as TSSOP-48 in distributor records. This nvSRAM integrates AutoStore functionality for data preservation and includes a Real-Time Clock (RTC) feature, distinguishing it from standard static RAM devices within the family.

Feature Summary

• AutoStore technology enables automatic data transfer to non-volatile storage upon power loss without software intervention.
• Integrated Real-Time Clock provides continuous timekeeping capabilities independent of system power cycles.
• CMOS construction ensures low power consumption while maintaining high-speed asynchronous operation.

Applications

• Data logging systems requiring persistent event recording
• Industrial control units needing reliable parameter retention
• Embedded systems with real-time clock synchronization requirements

Procurement Notes

Verify the specific suffix 'RF' against official Simtek documentation to confirm the exact package type and temperature range. Ensure compatibility with existing PCB footprints for the TSSOP-48 configuration. Cross-reference the manufacturer designation, as Cypress Semiconductor also lists this part number following their acquisition of Simtek assets.

Selection Notes

Select this component when both high-density non-volatile storage and precise timekeeping are required in a single IC. Compare the 45 ns access speed against system timing constraints. Evaluate the trade-off between the integrated RTC complexity and external clock sources if only basic data retention is needed.

Part Context

This part belongs to the STK17T series of nvSRAMs, which combine SRAM speed with EEPROM-like non-volatility. The 'A' variant typically denotes the 128K x 8 density level within the product line. The inclusion of the RTC function places it in a specialized subset designed for applications where timestamping data is critical.

Replacement Considerations

The CY14B256KA listed by Cypress Semiconductor serves as a functional equivalent within the same density class. Verify pinout compatibility and voltage levels before substitution. Other members of the STK17T family may offer different densities or speeds but share similar interface characteristics.