Magnetic Field Immunity
of Everspin MRAM
Copyright © 2015 Everspin Technologies
Magnetic Immunity for Everspin MRAM 7/2015
1
Everspin MRAM Magnetic Field Immunity
Everspin Technologies, Inc. is the worldwide leader in designing, manufacturing, and commercially shipping
discrete and embedded MRAM memories into markets and applications where data persistence and integ-
rity, low latency, and security are paramount.
Over 50 Million Everspin MRAM products are functioning reliably in discrete and embedded MRAM products
deployed in data center, cloud storage, energy, industrial, automotive, and transportation products world-
wide. This is over 2 trillion eld device hours of reliable MRAM operation.
It is a major design objective that all Everspin MRAM be immune to any data modication due to ambient
magnetic elds encountered in these and other applications where MRAM is an eective and valuable de-
sign element.
Case Studies
For more detailed descriptions of some current applications using Everspin MRAM, see the Case Studies on
our web site: www.everspin.com.
All Everspin MRAM products contain embedded magnetic shielding within their packages. The shields are
fabricated from high permeable metal which redirects ambient magnetic elds, signicantly reducing eld
strength at the die.
Magnetic Shielding in the Package
Everspin MRAM Magnetic Immunity Exceeds the IEC Magnetic Immunity Standard
The International Electrotechnical Commission (IEC) Standard IEC-61000-4-8 species that all electronics
devices must function within a magnetic eld of at least 13 Oersted (1,034 A/m).
All Everspin MRAM products have a Magnetic Immunity rating of at least 25 Oersted (2,000 A/m) under all
operating and handling conditions.
Copyright © 2015 Everspin Technologies
Magnetic Field Immunity
of Everspin MRAM
Magnetic Immunity for Everspin MRAM 7/2015
2
Magnetic Immunity (H
max
) Specications for Everspin MRAM
The maximum magnetic eld immunity specication value is the demonstrated maximum magnetic eld
strength that the MRAM can be subjected to without aecting the memory data.
The H
max
value for READ or Standby also applies to all unpowered handling cases for an MRAM, including manu-
facturing.
Magnetic Immunity (H
max
)
MRAM Family Part
Number
Mode Temp Rating Package
Max. Field
(A/m)
MR256A08B
MR0A08B
WRITE All Ratings All 2,000
READ or
Standby
All Ratings All 8,000
All values are advisory. Please consult the latest Everspin product data sheet for current
Magnetic Immunity values.
Table 1 – Parallel Interface 256Kb and 1Mbx8 MRAM Products
Table 2 – Parallel Interface 1Mbx16 and 4Mb MRAM Products
Magnetic Immunity (H
max
)
MRAM Family Part
Number
Mode Temp Rating Package
Max. Field
(A/m)
MR0A16A
MR2A08A
MR2A16A
WRITE
Commercial TSOP2, BGA 2,000
Industrial and
Extended
BGA 2,000
TSOP2 10,000
AEC-Q100
Grade 1
TSOP2 2,000
READ or
Standby
Commercial TSOP2, BGA 8,000
Industrial and
Extended
BGA 8,000
TSOP2 10,000
AEC-Q100
Grade 1
TSOP2 8,000
All values are advisory. Please consult the latest Everspin product data sheet for current Mag-
netic Immunity values.