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I*ODUCTION

The MR4A16B is a 16,777,216-bitmagnetoresistive random acces*emory (MRAM) device organized as 1,048,576wo* of 16 bits. The MR4A16B offers SRAM compatible 35 ns read/write timingwith unlimited endurance. Data is always non-volatile for greater than 20years. Data is automatically pro-tected on power loss by low-voltage inhibitcircuitry to prevent writes with voltage out of specification. To simplifyfault toleran*sign, the MR4A16B includes internal single bit errorcorrection code with 7 ECC parity bits for every 64 data bits. The MR4A16B isthe ideal memory solution for applicati* that must permanently store andretrieve critical data and programs quickly.

The MR4A16B is *ailable in a *allfootprint 48-pin ball grid array (BGA) package and a 54-pin thin *all outlinepackage (TSOP Type 2). These packages are compatible with similar low-powerSRAM products and other nonvolatile RAM products.

TheMR4A16B provides highly reliable data storage over a wide range oftemperatures. The product is offered with commercial temperature (0 to +70 °C),and industrial temperature (-40 to +85 °C) operating temperature opti*.