MR2A08AYS35 EverSpin Technologies Inc, MR2A08AYS35 Datasheet - Page 5

• Manufacturer Part Number: MR2A08AYS35
• Description: IC MRAM 4MBIT 35NS 44TSOP
• Manufacturer: EverSpin Technologies Inc

Specifications of MR2A08AYS35

• Format - Memory: RAM
• Memory Type: MRAM (Magnetoresistive RAM)
• Memory Size: 4M (512K x 8)
• Speed: 35ns
• Interface: Parallel
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-TSOP II
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 819-1004

Everspin Technologies © 2009
Electrical Specifications
Power Up and Power Down Sequencing
MRAM is protected from write operations whenever V
there is a startup time of 2 ms before read or write operations can start. This time allows memory power
supplies to stabilize.
The E and W control signals should track V
high for the startup time. In most systems, this means that these signals should be pulled up with a resis-
tor so that signal remains high if the driving signal is Hi-Z during power up. Any logic that drives E and W
should hold the signals high with a power-on reset signal for longer than the startup time.
During power loss or brownout where V
observed when power returns above V
i
ii
iii
iv
V
Automotive temperature profile assumes 10% duty cycle at maximum temperature (2-years out of 20-year life)
Parameter
Power supply voltage
Write inhibit voltage
Input high voltage
Input low voltage
Temperature under bias
There is a 2 ms startup time once V
V
MR2A08A (Commercial)
MR2A08AC (Industrial)
MR2A08AM (Automotive)
IH
IL
(min) = -0.5 V
(max) = V
WRITES INHIBITED
DD
+ 0.3 V
DC
; V
V
W
E
WI
IL
DC
(min) = -2.0 V
; V
IH
(max) = V
Figure 2.1 Power Up and Power Down Diagram
iv
STARTUP TIME
AC
DD
(pulse width ≤ 10 ns) for I ≤ 20.0 mA.
exceeds V
DD
+ 2.0 V
NORMAL OPERATION
Table 2.2 Operating Conditions
DD
Symbol
V
V
V
V
T
A
DD
DD
WI
IH
IL
(min).
AC
DD,
goes below V
V
DD
(pulse width ≤ 10 ns) for I ≤ 20.0 mA.
DD
(min). See Power Up and Power Down Sequencing below.
on power up to V
BROWNOUT OR POWER LOSS
Value
3.0
2.5
2.2
-0.5
0
-40
-40
5
DD
i
iii
is less than V
WI
, writes are protected and a startup time must be
STARTUP TIME
Document Number: MR2A08A Rev. 4, 7/2009
DD
- 0.2 V or V
NORMAL OPERATION
WI
. As soon as V
Typical
3.3
2.7
-
-
V
DD
IH
(whichever is lower) and remain
V
WI
DD
Max
3.6
3.0
V
0.8
70
85
125
MR2A08A
exceeds V
DD
i
+ 0.3
ii
DD
Unit
V
V
V
V
°C
(min),