Replace FM25V20A, ferroelectric memory SF25C25 for generator excitation system

As we all know, ferroelectric memory can be used in generator excitation system, the real-time data recording and parameter display module of excitation system needs large capacity memory that supports power-down saving, and ferroelectric memory is used to store switching and analog quantities in case of faults, in order to display and analyze the faults.

Ferroelectric memory has the advantages of high read/write endurance, high speed writing and low power consumption, for example, its write count life can be up to 1 million times, while the EEPROM is only 100,000 times, which is a great advantage in the program that needs real-time data storage. Therefore the device is now widely used in generator excitation systems.

The memory cell of the ferroelectric memory SF25C20 can be used for 1 million reads and writes, with data retention: 10 years @ 85°C (200 years @ 25°C) and no data loss when the device is powered down. With an operating voltage range of 2.7V to 3.6V and a minimum standby power consumption of only 9 microamps, it is able to instantly save data at low currents to ensure information security in the system. It has a great advantage in a real-time data storage scheme like generator excitation system.

The advantages of ferroelectric memory SF25C20 in generator excitation system application are introduced:

1, SF25C20 performance is compatible with MB85RS2MT (Fujitsu) and FM25V20A (Cypress), and can be replaced in place;

2, SF25C20 maximum power consumption of 5mA, standby current is only 7μA, can effectively reduce the power consumption of the system.

3, SF25C20 supports SPI serial interface, maximum 25MHz operating frequency, can meet the system‘s rapid communication needs.

4, SF25C20 working environment temperature range is -40 ℃ to 85 ℃, in line with the industrial environment applications.

5, SF25C20 adopts SOP8 small package, saving PCB board design space, easy to layout.