MR25H256CDF【PDF 1/20 页】IC MRAM 256KBIT 40MHZ 8DFN

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MR25H256

FEATURES

? No write delays

? Unlimited write endurance

? Data retention greater than 20 years

? Automatic data protection on power loss

? Block write protection

? Fast, simple SPI interface with up to 40 MHz clock rate

? 2.7 to 3.6 Volt power supply range

? Low current sleep mode

? Industrial temperatures

? Available in 8-pin DFN or 8-pin DFN Small Flag RoHS-compliant pack-

ages.

? Direct replacement for serial EEPROM, Flash, FeRAM

? AEC-Q100 Grade 1 option

256Kb Serial SPI MRAM

DFN

Small Flag DFN

RoHS

INTRODUCTION

The MR25H256 is a 262,144-bit magnetoresistive random access memory (MRAM) device orga-

nized as 32,768 words of 8 bits. The MR25H256 offers serial EEPROM and serial

Flash compatible read/write timing with no write delays and unlimited read/write

endurance.

Unlike other serial memories, both reads and writes can occur randomly in memo-

ry with no delay between writes. The MR25H256 is the ideal memory solution for applications that must

store and retrieve data and programs quickly using a small number of I/O pins.

The MR25H256 is available in either a 5 mm x 6 mm 8-pin DFN package or a 5 mm x 6 mm 8-pin DFN

Small Flag package. Both are compatible with serial EEPROM, Flash, and FeRAM products.

The MR25H256 provides highly reliable data storage over a wide range of temperatures. The product is

offered with industrial (-40° to +85 °C) and AEC-Q100 Grade 1 (-40°C to +125 °C) operating temperature

range options.

CONTENTS

1. DEVICE PIN ASSIGNMENT......................................................................... 3

2. SPI COMMUNICATIONS PROTOCOL...................................................... 4

3. ELECTRICAL SPECIFICATIONS................................................................. 10

4. TIMING SPECIFICATIONS.......................................................................... 14

5. ORDERING INFORMATION....................................................................... 16

6. MECHANICAL DRAWING.......................................................................... 17

7. REVISION HISTORY...................................................................................... 18

How to Reach Us.......................................................................................... 18

MR25H256 Rev. 9, 4/2013

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