MR0A08BCSO35R Everspin Technologies, MR0A08BCSO35R Datasheet - Page 5

• Manufacturer Part Number: MR0A08BCSO35R
• Description: NVRAM 3.3V 1Mb (128Kx8) MRAM
• Manufacturer: Everspin Technologies

Specifications of MR0A08BCSO35R

• Rohs: yes
• Data Bus Width: 8 bit
• Memory Size: 128 KB
• Organization: 128 K x 8
• Interface Type: Parallel
• Access Time: 35 ns
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 3 V
• Operating Current: 20 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Package / Case: SOIC-32
• Maximum Power Dissipation: 0.6 W
• Operating Temperature Range: - 40 C to + 85 C
• Operating Voltage: 3 V to 3.6 V

Everspin Technologies © 2011
Electrical Specifications
Power Up and Power Down Sequencing
The 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
1
2
3
V
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
MR0A08B (Commercial)
MR0A08BC (Industrial)
IH
IL
V
(min) = -0.5 V
(max) = V
V
V
WIDD
IH
IH
STARTUP
W
E
V
DD
DD
+ 0.3 V
DC
; V
READ/WRITE
INHIBITED
IL
2 ms
DC
(min) = -2.0 V
; V
IH
(max) = V
Figure 2.1 Power Up and Power Down Diagram
OPERATION
NORMAL
AC
DD
(pulse width ≤ 10 ns) for I ≤ 20.0 mA.
exceeds V
DD
+ 2.0 V
Table 2.2 Operating Conditions
DD
Symbol
V
V
V
V
T
A
DD
DD
WI
IH
IL
(min).
AC
DD,
goes below V
DD
(pulse width ≤ 10 ns) for I ≤ 20.0 mA.
(max). See Power Up and Power Down Sequencing below.
on power up to V
BROWNOUT or POWER LOSS
READ/WRITE
INHIBITED
Min
3.0
2.5
2.2
-0.5
0
-40
5
1
3
WI
, writes are protected and a startup time must be
DD
is less than V
DD
- 0.2 V or V
Typical
3.3
2.7
-
-
RECOVER
2 ms
WI
IH
. As soon as V
(whichever is lower) and remain
OPERATION
MMR0A08B Rev. 5, 12/2011
NORMAL
Max
3.6
3.0
V
0.8
70
85
DD
i
+ 0.3
MR0A08B
DD
exceeds V
2
Unit
V
V
V
V
°C
DD
(min),