FM25640B-G2TR

Product Overview

The Cypress Semiconductor Corp FM25640B-G2TR is an 8K x 8, 64Kbit FRAM (Ferroelectric RAM) memory IC for nonvolatile data storage in SPI-based embedded designs. It operates from a 4.5 V to 5.5 V supply and supports a 20 MHz SPI clock. The device is housed in a surface-mount 8-SOIC package with a 3.90 mm body width, and it is specified for an ambient operating temperature range of -40°C to 85°C. As part of the F-RAM series, it uses FRAM memory technology and an SPI interface to store configuration values, calibration data, or other retained information.

Key Features

• 64Kbit nonvolatile FRAM memory organized as 8K x 8
• SPI serial interface with a 20 MHz clock frequency
• 4.5 V to 5.5 V supply voltage range
• Specified operating temperature range of -40°C to 85°C (TA)
• Surface-mount 8-SOIC package, 0.154 in / 3.90 mm width
• Part of the Cypress Semiconductor Corp F-RAM series

Applications

• Embedded controllers that retain configuration parameters, user settings, or operational state across power cycles using an SPI bus
• Instrumentation and measurement devices that store calibration coefficients or small data sets in nonvolatile memory
• Data-logging modules that record small event counters or status bytes over SPI

Design & Procurement Notes

Design and procurement notes: Verify that the host controller provides a 4.5 V to 5.5 V supply and an SPI interface able to operate at the device's 20 MHz clock. The 8K x 8 organization should match the addressable data size required by the firmware. The surface-mount 8-SOIC package requires a footprint compatible with a 3.90 mm body width, and the PCB layout should account for the -40°C to 85°C ambient operating range. Because the memory format is FRAM, system software should treat stored data as nonvolatile, while still validating communication timing and supply stability during power-up and operation.