MR25H256APDF datasheet, PDF - EEWORLD Datasheet

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MR25H256APDF: DescriptionNVRAM 256Kb 3.3V 32Kx8 SPI; Categorysemiconductor Memory IC NVRAM; File Size1MB，25 Pages; ManufacturerEverspin Technologies; Environmental Compliance

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MR25H256APDF Overview

NVRAM 256Kb 3.3V 32Kx8 SPI

MR25H256APDF Parametric

Parameter Name	Attribute value
Maker	Everspin Technologies
Product Category	NVRAM
Package/box	DFN-8
Interface Type	SPI
storage	256 kbit
organize	32 k x 8
Data bus width	8 bit
Supply voltage - max.	3.6 V
Supply voltage - min.	2.7 V
Working power current	6 mA, 23 mA
Minimum operating temperature	- 40 C
Maximum operating temperature	+ 85 C
series	MR25H256
Encapsulation	Tray
Installation style	SMD/SMT
humidity sensitivity	Yes
Pd-power dissipation	600 mW
Factory packaging quantity	570

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MR25H256 / MR25H256A

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 and Automotive Grade 1 and Grade 3 tempera-

tures

• Available in 8-DFN or 8-DFN Small Flag RoHS-compliant

package.

• Direct replacement for serial EEPROM, Flash, FeRAM

• Industrial Grade and AEC-Q100 Grade 1 and Grade 3 options

• Moisture Sensitivity MSL-3

Product Versions and Options

MR25H256A

has been released for mass production and is recommended for all new designs.

MR25H256

remains in mass production but will be subject to eventual phase out and end of life

and is not recommended for new designs.Both versions have the same specifications.

MR25H256A Product Options

Grade

Industrial

Automotive AEC-Q100 Grade 3

Automotive AEC-Q100 Grade 1

Temperature Package

-40 to +85 C

-40 to +125 C

8-DFN Small Flag

256Kb Serial SPI MRAM

8-DFN

Small Flag 8-DFN

RoHS

MR25H256 Product Options

(Not recommended for new designs)

Grade

Temperature Package

8-DFN Small Flag

Industrial

-40 to +85 C

8-DFN

Automotive AEC-Q100 Grade 1

-40 to +125 C

8-DFN Small Flag

8-DFN

MR25H256 / MR25H256A Rev. 1.5 3/2018

MR25H256 / MR25H256A

TABLE OF CONTENTS

OVERVIEW ............................................................................................................................................4

Figure 1 – Block Diagram ........................................................................................................................................... 4

System Configuration .....................................................................................................................4

Figure 2 – System Configuration............................................................................................................................. 4

DEVICE PIN ASSIGNMENT ...................................................................................................................5

Figure 3 – Pin Diagram All 8-DFN Packages ........................................................................................................ 5

Table 1 – Pin Functions All 8-DFN Packages ....................................................................................................... 5

SPI COMMUNICATIONS PROTOCOL ...................................................................................................6

Table 2 – Command Codes ....................................................................................................................................... 6

Status Register and Block Write Protection ..................................................................................6

Table 3 – Status Register Bit Assignments ........................................................................................................... 6

Table 4 – Block Memory Write Protection............................................................................................................ 7

Table 5 – Memory Protection Modes .................................................................................................................... 7

Read Status Register (RDSR) ...........................................................................................................7

Figure 4 – RDSR ............................................................................................................................................................. 7

Write Enable (WREN) .......................................................................................................................8

Figure 5 – WREN ............................................................................................................................................................ 8

Write Disable (WRDI) .......................................................................................................................8

Figure 6 – WRDI ............................................................................................................................................................. 8

Write Status Register (WRSR) .........................................................................................................9

Figure 7 – WRSR............................................................................................................................................................. 9

Read Data Bytes (READ) ............................................................................................................... 10

Figure 8 – READ ...........................................................................................................................................................10

Write Data Bytes (WRITE) ............................................................................................................. 11

Figure 9 – WRITE..........................................................................................................................................................11

Enter Sleep Mode (SLEEP) ............................................................................................................ 12

Figure 10 – SLEEP........................................................................................................................................................12

MR25H256 / MR25H256A Rev. 1.5 3/2018

MR25H256 / MR25H256A

Table of Contents - Continued

Exit Sleep Mode (WAKE)............................................................................................................... 12

Figure 11 – WAKE ........................................................................................................................................................12

ELECTRICAL SPECIFICATIONS ......................................................................................................... 13

Absolute Maximum Ratings ........................................................................................................ 13

Table 6 – Absolute Maximum Ratings.................................................................................................................13

Table 7 – Operating Conditions.............................................................................................................................14

Table 8 – DC Characteristics....................................................................................................................................14

Table 9 – Power Supply Characteristics ..............................................................................................................14

TIMING SPECIFICATIONS ................................................................................................................. 15

Table 10 – Capacitance .............................................................................................................................................15

Table 11 – AC Measurement Conditions ............................................................................................................15

Figure 12 – Output Load for Impedance Parameter Measurements .......................................................15

Figure 13 – Output Load for All Other Parameter Measurements ............................................................15

Power-Up Timing .......................................................................................................................... 16

Table 12 – Power-Up..................................................................................................................................................16

Figure 14 – Power-Up Timing ................................................................................................................................16

Synchronous Data Timing............................................................................................................ 17

Table 13 – AC Timing Parameters .........................................................................................................................17

Figure 15 – Synchronous Data Timing ................................................................................................................19

Figure 16 – HOLD Timing ........................................................................................................................................19

ORDERING INFORMATION ............................................................................................................... 20

Table 14 – Ordering Part Number Decoder Table ...........................................................................................20

Table 15 – Ordering Part Numbers .......................................................................................................................20

PACKAGE OUTLINE DRAWINGS ....................................................................................................... 21

Figure 17 – 8-DFN Small Flag Package................................................................................................................21

Figure 18 – 8-DFN Package .....................................................................................................................................22

REVISION HISTORY ........................................................................................................................... 23

HOW TO REACH US ........................................................................................................................... 24

MR25H256 / MR25H256A Rev. 1.5 3/2018

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