MR20H40CDFR datasheet, PDF - EEWORLD Datasheet

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MR20H40CDFR: Descriptionnvram 4mb 3.3V 50mhz 512k x 8 spi; Categorysemiconductor Other integrated circuit (IC); File Size2MB，30 Pages; ManufacturerAll Sensors; Environmental Compliance

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MR20H40CDFR Overview

nvram 4mb 3.3V 50mhz 512k x 8 spi

MR20H40CDFR Parametric

Parameter Name	Attribute value
Manufacture	Everspin Technologies
Product Category	NVRAM
RoHS	Yes
Memory Size	4 Mbi
Packaging	Reel
Factory Pack Quantity	4000

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MR20H40 / MR25H40

MR20H40 -

50MHz/20ns

SCK (Industrial Temp Range) 4Mb SPI Interface MRAM

MR25H40 -

40MHz/25ns

SCK (Industrial, Extended and AEC-Q100 Grade 1 Temp Range) 4Mb SPI Interface MRAM

For more information on product options, see

“Table 16 – Ordering Part Numbers” on page 25.

FEATURES

•

No write delays

Unlimited write endurance

Data retention greater than 20 years

Automatic data protection on power loss

Fast, simple SPI interface, up to 50 MHz clock rate with MR20H40.

3.0 to 3.6 Volt power supply range

Low-current sleep mode

Industrial (-40 to 85°C), Extended (-40 to 105°C), and AEC-Q100

Grade 1 (-40 to 125°C) temperature range options.

Available in 8-pin DFN or 8-pin DFN Small Flag, RoHS-compliant

packages.

Direct replacement for serial EEPROM, Flash, and FeRAM

MSL Level 3

8-DFN Small Flag

8-DFN

RoHS

DESCRIPTION

MR2xH40 is a family of 4,194,304-bit magnetoresistive random access memory (MRAM) devices

organized as 524,288 words of 8 bits. They are the ideal memory solution for applications that must

store and retrieve data and programs quickly using a small number of I/O pins. They have serial EE-

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

endurance. Unlike other serial memories, with the MR2xH40 family both reads and writes can occur

randomly in memory with no delay between writes.

The MR2xH40 family provides highly reliable data storage over a wide range of temperatures. The

MR20H40 (50MHz) is offered with Industrial (-40° to +85 °C) range. The MR25H40 (40MHz) is offered

with Industrial (-40° to +85 °C), Extended (-40 to 105°C), and AEC-Q100 Grade 1 (-40°C to +125 °C)

operating temperature range options.

Both are available in a 5 x 6mm, 8-pin DFN package. The pinout is compatible with serial SRAM,

EEPROM, Flash, and FeRAM products.

MR20H40 / MR25H40 Revision 12.4, 3/2018

MR20H40 / MR25H40

TABLE OF CONTENTS

OVERVIEW ............................................................................................................................................5

Figure 1 – Block Diagram ........................................................................................................................................... 5

System Configuration .....................................................................................................................5

Figure 2 – System Configuration............................................................................................................................. 5

Pin Functions ...................................................................................................................................6

Figure 3 – DFN Package Pin Diagram (Top View) .............................................................................................. 6

Table 1 – Pin Functions ............................................................................................................................................... 6

SPI COMMUNICATIONS PROTOCOL ...................................................................................................7

Command Codes..............................................................................................................................7

Table 2 – Command Codes ....................................................................................................................................... 7

Status Register, Memory Protection and Block Write Protection ................................................8

Table 3 – Status Register Bit Assignments ........................................................................................................... 8

Memory Protection Modes .............................................................................................................8

Table 4 – Memory Protection Modes .................................................................................................................... 8

Block Protection Modes ..................................................................................................................9

Table 5 – Block Memory Write Protection............................................................................................................ 9

Read Status Register (RDSR) ........................................................................................................ 10

Figure 4 – Read Status Register (RDSR) Timing ................................................................................................10

Write Enable (WREN) .................................................................................................................... 10

Figure 5 – Write Enable (WREN) Timing ..............................................................................................................10

Write Disable (WRDI) .................................................................................................................... 11

Figure 6 – Write Disable (WRDI) Timing ..............................................................................................................11

Write Status Register (WRSR) ...................................................................................................... 11

Figure 7 – Write Status Register (WRSR) Timing ..............................................................................................11

Read Data Bytes (READ) ............................................................................................................... 12

Figure 8 – Read Data Bytes (READ) Timing ........................................................................................................12

MR20H40 / MR25H40 Revision 12.4 3/2018

MR20H40 / MR25H40

Table of Contents (Cont’d)

Write Data Bytes (WRITE) ............................................................................................................. 12

Figure 9 – Write Data Bytes (WRITE) Timing ......................................................................................................13

Enter Sleep Mode (SLEEP) ............................................................................................................ 13

Figure 10 – Enter Sleep Mode (SLEEP) Timing..................................................................................................13

Exit Sleep Mode (WAKE)............................................................................................................... 14

Figure 11 – Exit Sleep Mode (WAKE) Timing .....................................................................................................14

ELECTRICAL SPECIFICATIONS ......................................................................................................... 15

Absolute Maximum Ratings ........................................................................................................ 15

Table 6 – Absolute Maximum Ratings ..............................................................................................................15

Table 7 – Operating Conditions.............................................................................................................................16

Table 8 – DC Characteristics....................................................................................................................................16

Table 9 – Power Supply Characteristics ..............................................................................................................17

TIMING SPECIFICATIONS ................................................................................................................. 18

Capacitance................................................................................................................................... 18

Table 10 – Capacitance .............................................................................................................................................18

AC Measurement Conditions ....................................................................................................... 18

Table 11 – AC Measurement Conditions ............................................................................................................18

Figure 12 – Output Load for Impedance Parameter Measurements .......................................................18

Figure 13 – Output Load for all Other Parameter Measurements.............................................................18

Power Up Timing .......................................................................................................................... 19

Table 12 – Power-Up Timing ...................................................................................................................................19

Figure 14 – Power-Up Timing ................................................................................................................................19

AC Timing Parameters .................................................................................................................. 20

Table 13 – MR20H40 (

SCK = 50MHz) AC Timing Parameters .....................................................................20

Table 14 – MR25H40 (

SCK = 40MHz) AC Timing Parameters .....................................................................21

MR20H40 / MR25H40 Revision 12.4, 3/2018

MR20H40CDFR Related Products

	MR20H40CDFR	MR20H40CDF
Description	nvram 4mb 3.3V 50mhz 512k x 8 spi	nvram 4mb 3.3V 50mhz 512k x 8 spi
Manufacture	Everspin Technologies	Everspin Technologies
Product Category	NVRAM	NVRAM
RoHS	Yes	Yes
Memory Size	4 Mbi	4 Mbi
Packaging	Reel	Tray
Factory Pack Quantity	4000	570

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