Among the embedded devices of industrial control,instrumentation and data acquisition,the SPI MRAM of Everspin is widely used because of its advantages of high-speed random writing,no writing delay and high durability.As a 4Mb classic serial MRAM,MR25H40 is the core memory chip of many stock projects.Affected by the fluctuation of overseas original supply chain,the problems of spot shortage and long delivery time are frequent.The NETSOL product line of MRAM memory chip can be used as a compatible alternative to the corresponding model pin‑to‑pin of Everspin,which has spot resources and provides domestic alternative models for hardware engineers and purchasers.
First,characteristics of Everspin MR25H40 SPI serial interface MRAM memory chip
MR25H40 is a 4Mb(512K×8bit)SPI serial magnetoresistive memory with a maximum SPI clock of 40MHz.There is no additional write delay in reading and writing,and it supports reading and writing at random addresses.Everspin MR25H40 has high durability,and can save data when power is cut off,without erasing like Flash.
The power supply of SPI serial interface MRAM memory chip is 3.03.6 V,providing industrial 40~85℃,extended 40~105℃and AEC‑Q100 vehicle specification 40~125℃multi-temperature zone versions;Everspin MRAM memory chip MR25H40 is packaged in 5×6mm 8‑DFN,and its pins are compatible with traditional SPI‑Flash,EEPROM and FeRAM,which are mostly used for variable storage,running logs and configuration parameter saving scenarios.
Second,the replacement of NETSOL MRAM memory chip products
NETSOL MRAM,based on STT‑MRAM technology,is oriented to SPI serial nonvolatile storage market.It can evaluate the compatibility of Pinto hardware for MR25H40,and the package pins are aligned,so most existing PCBs do not need to be changed.The product line is not limited to a single model,and the capacity covers multiple gears,which can cover the replacement evaluation of more Everspin MRAM series models.
This kind of SPI MRAM is suitable for industrial controllers,portable acquisition terminals and black boxes of the Internet of Things,and is used to store equipment calibration parameters,fault logs and running variables.Compared with Flash,MRAM saves the block erase process and is suitable for frequent rewriting of scenes.Compared with FRAM,larger storage capacity can be realized.If you need to replace Everspin MR25H40,please feel free to contact us.RAMSUN agents can provide samples and technical support guidance.
Keywords：MR25H40
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Shenzhen Ramsun Microelectronics Co.,Ltd（Ramsun International） is a vendor of the seimicondutor componets and the memory IC’s solution with clear market advantage. We still focus on the promotion for some famous semicondutor brand ,and specially take the RAM(Random Access Memory) as our core products.
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