MR256A08B 32K x 8 MRAM FEATURES 3.3 Volt power supply Fast 35 ns read/write cycle SRAM compatible timing Native non-volatility 48-ball FBGA Unlimited read & write endurance Data always non-volatile for >20 years at temperature Commercial and industrial temperatures All products meet MSL-3 moisture sensitivity level RoHS-Compliant TSOP2, BGA and SOIC packages 44-pin TSOP2 BENEFITS One memory replaces FLASH, SRAM, EEPROM and MRAM in system for simpler, more efficient design Improves reliability by replacing battery-backed SRAM 32-pin SOIC INTRODUCTION The MR256A08B is a 262,144-bit magnetoresistive random access memory (MRAM) device organized as 32,768 words of 8 bits. The RoHS MR256A08B offers SRAM compatible 35ns read/write timing with un - limited endurance. Data is always non-volatile for greater than 20-years. Data is automatically protected on power loss by low-voltage inhibit circuitry to prevent writes with voltage out of specification. The MR256A08B is the ideal memory solution for applications that must permanently store and retrieve critical data and programs quickly. The MR256A08B is available in a small footprint 400-mil, 44-lead plastic small-outline TSOP type-2 package, an 8 mm x 8 mm, 48-pin ball grid array (BGA) package, or a 32-lead SOIC package. All package footprints are compatible with similar low-power SRAM products and other non-volatile RAM products. The MR256A08B provides highly reliable data storage over a wide range of temperatures. The product is offered with commercial temperature (0 to +70 C) and industrial temperature (-40 to +85 C) range options. Copyright 2013 Everspin Technologies 1 MR256A08B Rev. 6, 10/2013MR256A08B TABLE OF CONTENTS FEATURES .............................................................................................................................................1 BENEFITS ...............................................................................................................................................1 INTRODUCTION ...................................................................................................................................1 BLOCK DIAGRAM AND PIN ASSIGNMENTS .......................................................................................4 Figure 1 MR256A08B Block Diagram.................................................................................................................. 4 Table 1 MR256A08B Pin Functions...................................................................................................................... 4 Figure 2 Pin Diagrams for Available Packages (Top View) .......................................................................... 5 Table 2 Operating Modes ....................................................................................................................................... 5 ELECTRICAL SPECIFICATIONS ............................................................................................................6 Absolute Maximum Ratings ...........................................................................................................6 Table 3 Absolute Maximum Ratings ................................................................................................................... 6 OPERATING CONDITIONS ...................................................................................................................7 Table 4 Operating Conditions ............................................................................................................................... 7 Power Up and Power Down Sequencing .......................................................................................8 Figure 3 Power Up and Power Down Sequencing Timing Diagram ....................................................... 8 DC CHARACTERISTICS .........................................................................................................................9 Table 5 DC Characteristics ...................................................................................................................................... 9 Table 6 Power Supply Characteristics ..............................................................................................................10 TIMING SPECIFICATIONS ................................................................................................................. 11 Table 7 Capacitance ...............................................................................................................................................11 Table 8 AC Measurement Conditions ..............................................................................................................11 Figure 4 Output Load Test Low and High .......................................................................................................11 Figure 5 Output Load Test All Others ...............................................................................................................11 Read Mode .................................................................................................................................... 12 Table 9 Read Cycle Timing ...................................................................................................................................12 Copyright 2013 Everspin Technologies 2 MR256A08B Rev. 6, 10/2013