MR0A08BCSO35R [EVERSPIN]

128K x 8 MRAM;
MR0A08BCSO35R
型号: MR0A08BCSO35R
厂家: Everspin Technologies    Everspin Technologies
描述:

128K x 8 MRAM

静态存储器 光电二极管 内存集成电路
文件: 总23页 (文件大小:1279K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
MR0A08B  
128K x 8 MRAM  
FEATURES  
• 3.3 Volt power supply  
• Fast 35 ns read/write cycle  
• SRAM compatible timing  
• Native non-volatility  
• Unlimited read & write endurance  
• Data always non-volatile for >20 years at temperature  
• Commercial and industrial temperatures  
• All products meet MSL-3 moisture sensitivity level  
• RoHS-Compliant TSOP2 and BGA packages  
48-ball FBGA  
44-pin TSOP2  
BENEFITS  
• One memory replaces FLASH, SRAM, EEPROM and  
MRAM in system for simpler, more efficient design  
• Improves reliability by replacing battery-backed  
SRAM  
INTRODUCTION  
The MR0A08B is a 1,048,576-bit magnetoresistive random access  
memory (MRAM) device organized as 131,072 words of 8 bits. The  
MR0A08B offers SRAM compatible 35 ns read/write timing with unlim-  
ited endurance.  
RoHS  
Data is always non-volatile for greater than 20-years. Data is automatically protected on  
power loss by low-voltage inhibit circuitry to prevent writes with voltage out of specification.  
The MR0A08B is the ideal memory solution for applications that must permanently store and  
retrieve critical data and programs quickly.  
The MR0A08B is available in small footprint 400-mil, 44-lead plastic small-outline TSOP  
type-2 package, 8 mm x 8 mm, or a 48-pin ball grid array (BGA) package with 0.75 mm ball  
centers. (The 32-SOIC package options is obsolete and no longer available for new orders.)  
These packages are compatible with similar low-power SRAM products and other non-vola-  
tile RAM products.  
The MR0A08B provides highly reliable data storage over a wide range of temperatures. The  
product is offered with commercial temperature range (0 to +70 °C) and industrial tempera-  
ture range (-40 to +85 °C).  
1
Copyright © 2018 Everspin Technologies  
MR0A08B Rev. 8.6, 3/2018  
MR0A08B  
TABLE OF CONTENTS  
FEATURES .............................................................................................................................................1  
BENEFITS...............................................................................................................................................1  
INTRODUCTION ...................................................................................................................................1  
BLOCK DIAGRAM AND PIN ASSIGNMENTS.......................................................................................4  
Figure 1 – MR0A08B Block Diagram ...................................................................................................................... 4  
Table 1 – Pin Functions............................................................................................................................................... 4  
1 ...................................................................... 5  
Figure 2 – Pin Diagrams for Available Packages (Top View)  
OPERATING MODES.............................................................................................................................5  
Table 2 – Operating Modes....................................................................................................................................... 5  
ELECTRICAL SPECIFICATIONS ............................................................................................................6  
Table 3 – Absolute Maximum Ratings................................................................................................................... 6  
OPERATING CONDITIONS ...................................................................................................................7  
Table 4 – Operating Conditions............................................................................................................................... 7  
Power Up and Power Down Sequencing .......................................................................................8  
Figure 3 – Power Up and Power Down Diagram............................................................................................... 8  
DC CHARACTERISTICS.........................................................................................................................9  
Table 5 – DC Characteristics...................................................................................................................................... 9  
Table 6 – Power Supply Characteristics................................................................................................................ 9  
TIMING SPECIFICATIONS ................................................................................................................. 10  
Table 7 – Capacitance ...............................................................................................................................................10  
Table 8 – AC Measurement Conditions ..............................................................................................................10  
Figure 4 – Output Load Test Low and High.......................................................................................................10  
Figure 5 – Output Load Test All Others...............................................................................................................10  
2
Copyright © 2018 Everspin Technologies  
MR0A08B Rev. 8.6, 3/2018  
MR0A08B  
TABLE OF CONTENTS (CONT’D)  
Read Mode .................................................................................................................................... 11  
Table 9 – Read Cycle Timing ...................................................................................................................................11  
Figure 6 – Read Cycle 1.............................................................................................................................................12  
Figure 7 – Read Cycle 2.............................................................................................................................................12  
Write Mode.................................................................................................................................... 13  
Table 10 – Write Cycle Timing 1 ( W Controlled ).............................................................................................13  
Figure 8 – Write Cycle Timing 1 (W Controlled) ...............................................................................................14  
Table 11 – Write Cycle Timing 2 (E Controlled)................................................................................................15  
Figure 9 – Write Cycle Timing 2 (E Controlled) ................................................................................................16  
Table 12 – Write Cycle Timing 3 (Shortened t  
, W and E Controlled).............................................17  
, W and E Controlled)...........................................17  
WHAX  
Figure 10 – Write Cycle Timing 3 (Shortened t  
WHAX  
ORDERING INFORMATION ............................................................................................................... 18  
Table 13 – Ordering Part Number System for Parallel I/O MRAM..............................................................18  
1...............................................................................................18  
Table 14 – MR0A08B Ordering Part Numbers  
PACKAGE OUTLINE DRAWINGS....................................................................................................... 19  
Figure 11 – 44-TSOP2 Package Outline...............................................................................................................19  
Figure 12 – 48-BGA Package Outline...................................................................................................................20  
1 ..............................................................................................................21  
Figure 13 – 32-SOIC Package Outline  
REVISION HISTORY ........................................................................................................................... 22  
HOW TO CONTACT US....................................................................................................................... 23  
3
Copyright © 2018 Everspin Technologies  
MR0A08B Rev. 8.6, 3/2018  
MR0A08B  
BLOCK DIAGRAM AND PIN ASSIGNMENTS  
Figure 1 – MR0A08B Block Diagram  
OUTPUT  
ENABLE  
BUFFER  
G
OUTPUT ENABLE  
7
A[16:0] ADDRESS  
ROW  
DECODER  
10  
BUFFER  
COLUMN  
DECODER  
17  
CHIP  
ENABLE  
BUFFER  
E
8
8
OUTPUT  
BUFFER  
8
SENSE  
AMPS  
128k x 8  
BIT  
MEMORY  
ARRAY  
WRITE  
ENABLE  
BUFFER  
W
FINAL  
WRITE  
DRIVERS  
8
8
WRITE  
DRIVER  
8
DQ[7:0]  
WRITE ENABLE  
Table 1 – Pin Functions  
Signal Name Function  
A
E
Address Input  
Chip Enable  
Write Enable  
Output Enable  
Data I/O  
W
G
DQ  
V
Power Supply  
Ground  
DD  
V
SS  
DC  
NC  
Do Not Connect  
No Connection - Pin 2, 40, 41,43 (TSOP2); Ball C2, C5, D3, F2, F5, G1, G2, G6, H1, H6  
(BGA); Pin 30 (SOIC) Reserved For Future Expansion  
4
Copyright © 2018 Everspin Technologies  
MR0A08B Rev. 8.6, 3/2018  
MR0A08B  
1
Figure 2 – Pin Diagrams for Available Packages ꢀTop Viewꢁ  
DC  
NC  
Aꢀ  
Aꢁ  
1
2
44  
43  
42  
41  
40  
39  
38  
37  
36  
35  
34  
33  
32  
31  
30  
29  
28  
27  
26  
25  
24  
23  
DC  
1
32  
31  
30  
29  
28  
27  
26  
25  
24  
23  
22  
21  
20  
19  
18  
17  
V
DD  
DC  
NC  
DC  
NC  
NC  
Aꢁꢉ  
A
2
A
15  
16  
14  
12  
1
2
3
4
5
6
3
NC  
W
A
A
3
4
A0  
A1  
A2  
A
B
C
D
E
DC  
G
DC  
5
Aꢂ  
4
6
Aꢃ  
Aꢇ  
E
A3  
A5  
A4  
A6  
A
5
A
NC  
DQ0  
VSS  
DC  
E
DC  
DQ4  
VDD  
VSS  
7
6
5
4
3
2
1
0
0
1
2
13  
7
Aꢁꢈ  
8
A
6
A
8
G
DQ7  
DQ6  
NC  
DQ1  
DQ2  
NC  
DQ5  
DQ6  
9
DQ0  
A
A
7
A
A
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
DQ1  
8
A7  
11  
NC  
DC  
A14  
A12  
VDD  
V
SS  
V
SS  
G
A
V
DD  
A
9
VDD  
DQ3  
A16  
A15  
A13  
A10  
DQ2  
DQ3  
W
DQ5  
DQ4  
DC  
A
10  
11  
12  
13  
14  
15  
16  
10  
A
E
F
DQ7  
NC  
NC  
A8  
NC  
W
Aꢁꢇ  
Aꢁꢃ  
Aꢈ  
Aꢉ  
Aꢄ  
Aꢅ  
Aꢆ  
DC  
DC  
A
DQ  
DQ  
DQ  
DQ  
DQ  
7
6
5
4
3
G
H
NC  
NC  
NC  
NC  
DQ  
DQ  
DQ  
V
Aꢁꢂ  
Aꢁꢁ  
Aꢁꢀ  
A9  
A11  
DC  
DC  
SS  
1
44 Pin TSOP2  
32 Pin SOIC  
48 Pin FBGA  
Note:  
1. The 32-SOIC package is obsolete and shown for legacy reference only. This package option is no longer  
available for new orders.  
OPERATING MODES  
Table 2 – Operating Modes  
1
1
1
2
E
G
W
Mode  
Not selected  
Output disabled  
Byte Read  
VDD Current  
DQ[7:0]  
Hi-Z  
H
X
X
I
, I  
SB1 SB2  
L
L
L
H
L
H
H
L
I
Hi-Z  
DDR  
I
D
DDR  
Out  
X
Byte Write  
I
D
DDW  
in  
Notes:  
1. H = high, L = low, X = don’t care  
2. Hi-Z = high impedance  
5
Copyright © 2018 Everspin Technologies  
MR0A08B Rev. 8.6, 3/2018  
MR0A08B  
ELECTRICAL SPECIFICATIONS  
Absolute Maximum Ratings  
This device contains circuitry to protect the inputs against damage caused by high static voltages or electric  
fields; however, it is advised that normal precautions be taken to avoid application of any voltage greater  
than maximum rated voltages to these high-impedance (Hi-Z) circuits.  
The device also contains protection against external magnetic fields. Precautions should be taken o avoid  
application of any magnetic field more intense than the maximum field intensity specified in the maximum  
1
ratings.  
Table 3 – Absolute Maximum Ratings  
Parameter  
Symbol  
Value  
Unit  
2,3  
Supply voltage  
V
-0.5 to 4.0  
V
DD  
2,3  
Voltage on any pin  
V
-0.5 to V + 0.5  
V
mA  
W
IN  
DD  
Output current per pin  
I
20  
OUT  
3
Package power dissipation  
Temperature under bias  
P
0.600  
D
MR0A08B (Commercial)  
MR0A08BC (Industrial)  
-10 to 85  
-45 to 95  
T
°C  
BIAS  
Storage Temperature  
T
-55 to 150  
260  
°C  
°C  
stg  
Lead temperature during solder (3 minute max)  
T
Lead  
Maximum magnetic field during write  
MR0A08B (All Temperatures)  
H
2000  
A/m  
max_write  
Maximum magnetic field during read or standby  
H
8000  
A/m  
max_read  
Notes:  
1. Permanent device damage may occur if absolute maximum ratings are exceeded. Functional opera-  
tion should be restricted to recommended operating conditions. Exposure to excessive voltages or  
magnetic fields could affect device reliability.  
2. All voltages are referenced to V .  
SS  
3. Power dissipation capability depends on package characteristics and use environment.  
6
Copyright © 2018 Everspin Technologies  
MR0A08B Rev. 8.6, 3/2018  
MR0A08B  
OPERATING CONDITIONS  
Table 4 – Operating Conditions  
Parameter  
Symbol  
Min  
Typical  
Max  
Unit  
1
V
Power supply voltage  
3.0  
3.3  
3.6  
V
DD  
1
V
Write inhibit voltage  
Input high voltage  
2.5  
2.2  
2.7  
3.0  
V
V
V
WI  
2
V
-
-
V
+ 0.3  
DD  
IH  
3
Input low voltage  
V
-0.5  
0.8  
IL  
Temperature under bias  
MR0A08B (Commercial)  
MR0A08BC (Industrial)  
T
0
70  
85  
°C  
A
-40  
Notes:  
1. There is a 2 ms startup time once V exceeds V (max). See “Figure 3 – Power Up and Power Down  
DD  
DD,  
Diagram” .  
2. V (max) = V + 0.3 V ; V (max) = V + 2.0 V (pulse width ≤ 10 ns) for I ≤ 20.0 mA.  
IH  
DD  
DC  
IH  
DD  
AC  
3. V (min) = -0.5 V ; V (min) = -2.0 V (pulse width ≤ 10 ns) for I ≤ 20.0 mA.  
IL  
DC IL  
AC  
7
Copyright © 2018 Everspin Technologies  
MR0A08B Rev. 8.6, 3/2018  
MR0A08B  
Power Up and Power Down Sequencing  
The MRAM is protected from write operations whenever V is less than V . As soon as V exceeds  
DD  
WI  
DD  
V
(min), there is a startup time of 2 ms before read or write operations can start. This time allows memory  
DD  
power supplies to stabilize.  
The E and W control signals should track V on power up to V - 0.2 V or V (whichever is lower) and  
DD  
DD  
IH  
remain high for the startup time. In most systems, this means that these signals should be pulled up with a  
resistor 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 goes below V , writes are protected and a startup time must be  
DD  
WI  
observed when power returns above V (min).  
DD  
Figure 3 – Power Up and Power Down Diagram  
VDD  
V
WI  
BROWNOUT or POWER LOSS  
2 ms  
2 ms  
STARTUP  
RECOVER  
NORMAL  
OPERATION  
NORMAL  
OPERATION  
READ/WRITE  
INHIBITED  
READ/WRITE  
INHIBITED  
VIH  
VIH  
E
W
8
Copyright © 2018 Everspin Technologies  
MR0A08B Rev. 8.6, 3/2018  
MR0A08B  
DC CHARACTERISTICS  
Table 5 – DC Characteristics  
Parameter  
Symbol  
Min  
Typical  
Max  
Unit  
Input leakage current  
-
-
1
μA  
I
lkg(I)  
Output leakage current  
Output low voltage  
-
-
-
-
-
1
μA  
V
I
lkg(O)  
(I = +4 mA)  
0.4  
OL  
V
OL  
(I = +100 μA)  
V
+ 0.2  
OL  
SS  
Output high voltage  
(I = -4 mA)  
V
2.4  
-
V
OL  
OH  
(I = -100 μA)  
V
- 0.2  
OL  
DD  
Table 6 – Power Supply Characteristics  
Parameter  
Symbol  
Typical  
Max  
Unit  
1
AC active supply current - read modes  
(I = 0 mA, V = max)  
25  
30  
mA  
I
DDR  
OUT  
DD  
1
AC active supply current - write modes  
(V = max)  
DD  
MR0A08B (Commercial)  
MR0A08BC (Industrial)  
55  
55  
65  
70  
mA  
mA  
I
DDW  
AC standby current  
(V = max, E = V )  
6
7
I
DD  
IH  
SB1  
no other restrictions on other inputs  
CMOS standby current  
( E ≥ V - 0.2 V and V ≤ V + 0.2 V or ≥ V - 0.2 V )  
5
6
mA  
I
DD  
In  
SS  
DD  
SB2  
( V = max, f = 0 MHz )  
DD  
Notes:  
1. All active current measurements are measured with one address transition per cycle and at minimum cycle time.  
9
Copyright © 2018 Everspin Technologies  
MR0A08B Rev. 8.6, 3/2018  
MR0A08B  
TIMING SPECIFICATIONS  
Table 7 – Capacitance  
1
Parameter  
Symbol  
Typical  
Max  
Unit  
C
Address input capacitance  
Control input capacitance  
-
6
pF  
In  
C
-
-
6
8
pF  
pF  
In  
C
Input/Output capacitance  
I/O  
Notes:  
1. f = 1.0 MHz, dV = 3.0 V, T = 25 °C, periodically sampled rather than 100% tested.  
A
Table 8 – AC Measurement Conditions  
Parameter  
Value  
1.5  
Unit  
Logic input timing measurement reference level  
Logic output timing measurement reference level  
Logic input pulse levels  
V
V
1.5  
0 or 3.0  
2
V
Input rise/fall time  
ns  
Output load for low and high impedance parameters  
Output load for all other timing parameters  
See Figure 4  
See Figure 5  
Figure 4 – Output Load Test Low and High  
ZD= 50 Ω  
Output  
RL = 50 Ω  
VL = 1.5 V  
Figure 5 – Output Load Test All Others  
3.3 V  
590 Ω  
Output  
5 pF  
435 Ω  
10  
Copyright © 2018 Everspin Technologies  
MR0A08B Rev. 8.6, 3/2018  
MR0A08B  
Read Mode  
Table 9 – Read Cycle Timing  
1
Parameter  
Symbol  
Min  
Max  
Unit  
t
Read cycle time  
AVAV  
35  
-
ns  
t
Address access time  
AVQV  
-
-
35  
35  
15  
-
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
2
t
Enable access time  
ELQV  
t
Output enable access time  
Output hold from address change  
GLQV  
-
t
AXQX  
3
3
0
0
0
3
t
Enable low to output active  
ELQX  
-
3
t
Output enable low to output active  
GLQX  
-
3
t
Enable high to output Hi-Z  
EHQZ  
15  
10  
3
t
Output enable high to output Hi-Z  
GHQZ  
Notes:  
1. W is high for read cycle. Power supplies must be properly grounded and decoupled, and bus contention conditions must be  
minimized or eliminated during read or write cycles.  
2. Addresses valid before or at the same time E goes low.  
3. This parameter is sampled and not 100% tested. Transition is measured 200 mV from the steady-state voltage.  
11  
Copyright © 2018 Everspin Technologies  
MR0A08B Rev. 8.6, 3/2018  
MR0A08B  
Figure 6 – Read Cycle 1  
tAVAV  
A (ADDRESS)  
Q (DATA OUT)  
tAXQX  
Previous Data Valid  
Data Valid  
tAVQV  
Note: Device is continuously selected (E≤VIL, G≤VIL).  
Figure 7 – Read Cycle 2  
tAVAV  
A (ADDRESS)  
tAVQV  
tELQV  
E (CHIP ENABLE)  
tEHQZ  
tELQX  
G (OUTPUT ENABLE)  
Q (DATA OUT)  
tGHQZ  
tGLQV  
tGLQX  
Data Valid  
12  
Copyright © 2018 Everspin Technologies  
MR0A08B Rev. 8.6, 3/2018  
MR0A08B  
Write Mode  
Table 10 – Write Cycle Timing 1 ꢀ W Controlled ꢁ  
1
Parameter  
Symbol  
Min  
Max  
Unit  
2
t
Write cycle time  
AVAV  
35  
-
-
-
ns  
t
Address set-up time  
AVWL  
0
ns  
ns  
ns  
t
Address valid to end of write (G high)  
Address valid to end of write (G low)  
AVWH  
18  
20  
t
AVWH  
-
-
t
t
WLWH  
WLEH  
Write pulse width (G high)  
Write pulse width (G low)  
15  
15  
ns  
ns  
t
t
WLWH  
WLEH  
-
t
Data valid to end of write  
Data hold time  
DVWH  
10  
0
-
-
ns  
ns  
ns  
ns  
t
WHDX  
3
t
Write low to data Hi-Z  
WLQZ  
0
12  
-
3
t
Write high to output active  
WHQX  
3
t
Write recovery time  
Notes:  
12  
-
ns  
WHAX  
1. All write occurs during the overlap of E low and W low. Power supplies must be properly grounded and decoupled and bus  
contention conditions must be minimized or eliminated during read and write cycles. If G goes low at the same time or after  
W goes low, the output will remain in a high impedance state. After W or E has been brought high, the signal must remain  
in steady-state high for a minimum of 2 ns. The minimum time between E being asserted low in one cycle to E being as-  
serted low in a subsequent cycle is the same as the minimum cycle time allowed for the device.  
2. All write cycle timings are referenced from the last valid address to the first transition address.  
3. This parameter is sampled and not 100% tested. Transition is measured 200 mV from the steady-state voltage. At any given  
voltage or temperate, t  
(max) < t  
(min)  
WLQZ  
WHQX  
13  
Copyright © 2018 Everspin Technologies  
MR0A08B Rev. 8.6, 3/2018  
MR0A08B  
Figure 8 – Write Cycle Timing 1 ꢀW Controlledꢁ  
tAVAV  
A (ADDRESS)  
tAVWH  
tWHAX  
E (CHIP ENABLE)  
tWLEH  
tWLWH  
W (WRITE ENABLE)  
tAVWL  
tDVWH  
DATA VALID  
tWHDX  
D (DATA IN)  
tWLQZ  
Hi -Z  
Hi -Z  
Q (DATA OUT)  
tWHQX  
14  
Copyright © 2018 Everspin Technologies  
MR0A08B Rev. 8.6, 3/2018  
MR0A08B  
Table 11 – Write Cycle Timing 2 ꢀE Controlledꢁ  
1
Parameter  
Symbol  
Min  
35  
0
Max  
Unit  
ns  
2
t
Write cycle time  
AVAV  
-
-
-
t
Address set-up time  
AVEL  
ns  
t
AVEH  
18  
ns  
Address valid to end of write (G high)  
Address valid to end of write (G low)  
t
AVEH  
20  
15  
-
-
ns  
ns  
t
ELEH  
Enable to end of write (G high)  
t
ELWH  
t
ELEH  
3
15  
-
ns  
Enable to end of write (G low)  
t
ELWH  
t
Data valid to end of write  
Data hold time  
DVEH  
10  
0
-
-
-
ns  
ns  
ns  
t
EHDX  
t
Write recovery time  
Notes:  
EHAX  
12  
1. All write occurs during the overlap of E low and W low. Power supplies must be properly grounded and decoupled and bus  
contention conditions must be minimized or eliminated during read and write cycles. If G goes low at the same time or  
after W goes low, the output will remain in a high impedance state. After W or E has been brought high, the signal must re-  
main in steady-state high for a minimum of 2 ns. The minimum time between E being asserted low in one cycle to E being  
asserted low in a subsequent cycle is the same as the minimum cycle time allowed for the device.  
2. All write cycle timings are referenced from the last valid address to the first transition address.  
3. If E goes low at the same time or after W goes low, the output will remain in a high-impedance state. If E goes high at the  
same time or before W goes high, the output will remain in a high-impedance state.  
15  
Copyright © 2018 Everspin Technologies  
MR0A08B Rev. 8.6, 3/2018  
MR0A08B  
Figure 9 – Write Cycle Timing 2 ꢀE Controlledꢁ  
tAVAV  
A (ADDRESS)  
E (CHIP ENABLE)  
tEHAX  
tAVEH  
tELEH  
tELWH  
tAVEL  
W (WRITE ENABLE)  
tEHDX  
tDVEH  
D (DATA IN)  
Data Valid  
Hi-Z  
Q (DATA OUT)  
16  
Copyright © 2018 Everspin Technologies  
MR0A08B Rev. 8.6, 3/2018  
MR0A08B  
Table 12 – Write Cycle Timing 3 ꢀShortened tWHAX, W and E Controlledꢁ  
1
Parameter  
Symbol  
Min  
Max  
Unit  
2
t
Write cycle time  
AVAV  
35  
-
ns  
t
Address set-up time  
AVWL  
0
-
-
-
ns  
ns  
ns  
t
AVWH  
18  
20  
Address valid to end of write (G high)  
Address valid to end of write (G low)  
t
AVWH  
t
t
WLWH  
WLEH  
Write pulse width  
15  
-
ns  
t
Data valid to end of write  
Data hold time  
DVWH  
10  
0
-
-
-
-
-
ns  
ns  
ns  
ns  
ns  
t
WHDX  
t
Enable recovery time  
EHAX  
-2  
6
3
t
Write recovery time  
WHAX  
3
t
Write to enable recovery time  
WHEL  
12  
Notes:  
1. All write occurs during the overlap of E low and W low. Power supplies must be properly grounded and decoupled and bus  
contention conditions must be minimized or eliminated during read and write cycles. If G goes low at the same time or  
after W goes low, the output will remain in a high impedance state. After W, or E has been brought high, the signal must re-  
main in steady-state high for a minimum of 2 ns. The minimum time between E being asserted low in one cycle to E being  
asserted low in a subsequent cycle is the same as the minimum cycle time allowed for the device.  
2. All write cycle timings are referenced from the last valid address to the first transition address.  
3. If E goes low at the same time or after W goes low the output will remain in a high impedance state. If E goes high at the  
same time or before W goes high the output will remain in a high impedance state. E must be brought high each cycle.  
Figure 10 – Write Cycle Timing 3 ꢀShortened tWHAX, W and E Controlledꢁ  
tAVAV  
A (ADDRESS)  
t
WHAX  
tAVWH  
tEHAX  
E (CHIP ENABLE)  
t WLEH  
tWLWH  
tWHEL  
tWHDX  
W (WRITE ENABLE)  
t AVWL  
t DVWH  
D (DATA IN)  
17  
Copyright © 2018 Everspin Technologies  
MR0A08B Rev. 8.6, 3/2018  
MR0A08B  
ORDERING INFORMATION  
Table 13 – Ordering Part Number System for Parallel I/O MRAM  
Memory Density Type I/O Width  
MR 08  
Rev.  
B
Temp Package Speed Packing Grade  
MA 35  
Example Ordering Part Number  
0
A
C
R
MRAM  
256 Kb  
1 Mb  
MR  
256  
0
4 Mb  
2
16 Mb  
Async 3.3v  
4
A
D
Async 3.3v Vdd and 1.8v Vddq  
DL  
Async 3.3v Vdd and 1.8v Vddq with 2.7v min. Vdd  
8-bit  
08  
16-bit  
Rev A  
Rev B  
16  
A
B
Commercial  
Industrial  
Extended  
0 to 70°C  
-40 to 85°C  
-40 to 105°C  
Blank  
C
V
AEC Q-100 Grade 1 -40 to 125°C  
44-TSOP-2  
M
YS  
48-FBGA  
16-SOIC  
MA  
SC  
32-SOIC  
35 ns  
SO  
35  
45 ns  
45  
Tray  
Blank  
R
ES  
Blank  
Blank  
Tape and Reel  
Engineering Samples  
Customer Samples  
Mass Producon  
1
Table 14 – MR0A08B Ordering Part Numbers  
Temp Grade  
Temp  
Package  
Shipping  
Tray  
Ordering Part Number  
MR0A08BYS35  
44-TSOP2  
Tape and Reel  
Tray  
MR0A08BYS35R  
MR0A08BMA35  
Commercial  
48-BGA  
0 to +70 °C  
Tape and Reel  
Tray  
MR0A08BMA35R  
MR0A08BSO35 Obsolete  
MR0A08BSO35R Obsolete  
MR0A08BCYS35  
1
32-SOIC  
Tape and Reel  
Tray  
44-TSOP2  
48-BGA  
Tape and Reel  
Tray  
MR0A08BCYS35R  
MR0A08BCMA35  
Industrial  
-40 to +85 °C  
Tape and Reel  
Tray  
MR0A08BCMA35R  
MR0A08BCSO35 Obsolete  
MR0A08BCSO35R Obsolete  
1
32-SOIC  
Tape and Reel  
1
The 32-SOIC package option is obsolete and no longer available. See PCN02895 here.  
18  
Copyright © 2018 Everspin Technologies  
MR0A08B Rev. 8.6, 3/2018  
MR0A08B  
PACKAGE OUTLINE DRAWINGS  
Figure 11 – 44-TSOP2 Package Outline  
Not To Scale  
1. Dimensions and tolerances per ASME Y14.5M - 1994.  
2. Dimensions in Millimeters.  
3. Dimensions do not include mold protrusion.  
4. Dimension does not include DAM bar protrusions.  
5. DAM Bar protrusion shall not cause the lead width to  
exceed 0.58.  
44  
19  
Copyright © 2018 Everspin Technologies  
MR0A08B Rev. 8.6, 3/2018  
MR0A08B  
Figure 12 – 48-BGA Package Outline  
TOP VIEW  
0.41  
0.31  
0.32  
0.22  
SIDE VIEW  
BOTTOM VIEW  
Not To Scale  
1. Dimensions in Millimeters.  
2. Dimensions and tolerances per ASME Y14.5M - 1994.  
3. Maximum solder ball diameter measured parallel to DATUM A  
4. DATUM A, the seating plane is determined by the spherical crowns  
of the solder balls.  
5.  
surface of package.  
20  
Copyright © 2018 Everspin Technologies  
MR0A08B Rev. 8.6, 3/2018  
MR0A08B  
1
Figure 13 – 32-SOIC Package Outline  
PIN 1 ID  
32  
17  
J
Reference JEDEC MO-119  
K
1
16  
A
I
G
D
C
H
E
F
B
Unit  
A
B
C
D
E
F
G
H
I
J
K
mm - Min 20.574 1.00  
- Max 20.878 1.50  
0.355 0.66  
0.508 0.81  
0.101 2.286 Radius 0.533 0.152 7.416 10.287  
0.254 2.540 0.101 1.041 0.304 7.594 10.642  
inch - Min 0.810 0.04  
- Max 0.822 0.06  
0.14  
0.02  
0.026 0.004 0.09  
0.032 0.010 0.10  
Radius 0.021 0.006 0.292 0.405  
0.0040 0.041 0.012 0.299 0.419  
Note:  
1. The 32-SOIC package is obsolete and shown for legacy reference only. This package option is no longer  
available for new orders.  
21  
Copyright © 2018 Everspin Technologies  
MR0A08B Rev. 8.6, 3/2018  
MR0A08B  
REVISION HISTORY  
Revi-  
sion  
Date  
Description of Change  
0
Sep 12, 2008  
Initial Advance Information Release  
Revised format; Add Table 3.6 Write Timing Cycle 3; Add Figure 3.6 Write  
Timing Cycle 3; Add TSOPII Lead Width Info; Changed to Preliminary from  
Product Concept.  
1
May 8, 2009  
Changed from datasheet from Preliminary to Production except where  
noted.  
2
3
4
June 18, 2009  
Apr 12, 2011  
Added SOIC package option.  
Corrected SOIC Pin 1 to read DC. Updated contact information. Revised  
copyright year.  
August 15, 2011  
Changed TSOP-II to TSOP2. Changed logo to new EST Logo. Added In-  
dustrial Temp Grade option in SOIC package, Table 4.1. Deleted Tape &  
Reel pack option for all SOIC packaged parts. Figure 2.1 cosmetic update.  
Figure 5.2 BGA package outline drawing revised for ball size.  
5
Dec 16, 2011  
July 9, 2013  
6
7
MR0A08BCSO35 preliminary status removed. Now MP.  
September 4, 2013 Added table of dimenstions to the SOIC package outline diagram.  
Added Tape and Reel shipping option for SOIC packged versions. Refor-  
matted to current standards.  
8
October 11, 2013  
8.1  
8.2  
8.3  
8.4  
8.5  
8.6  
May 18, 2015  
Revised How to Contact Us information.  
June 11, 2015  
July 20, 2015  
Correction to Japan Sales Office telephone number.  
32-SOIC package options Not Recommended for New Designs.  
32-SOIC package options are obsolete and no longer available.  
October 17, 2015  
December 9, 2015  
March 22, 2018  
Corrections to incorrect package pinouts and replaced missing 48-BGA  
package outline drawing.  
Updated Contact Us table  
22  
Copyright © 2018 Everspin Technologies  
MR0A08B Rev. 8.6, 3/2018  
MR0A08B  
HOW TO CONTACT US  
Home Page:  
Everspin Technologies, Inc.  
www.everspin.com  
Information in this document is provided solely to enable system and  
software implementers to use Everspin Technologies products. There are  
no express or implied licenses granted hereunder to design or fabricate any  
integrated circuit or circuits based on the information in this document.  
Everspin Technologies reserves the right to make changes without further  
notice to any products herein. Everspin makes no warranty, representa-  
tion or guarantee regarding the suitability of its products for any particular  
purpose, nor does Everspin Technologies assume any liability arising out of  
the application or use of any product or circuit, and specifically disclaims  
any and all liability, including without limitation consequential or inci-  
dental damages. “Typicalparameters, which may be provided in Everspin  
Technologies data sheets and/or specifications can and do vary in differ-  
ent applications and actual performance may vary over time. All operating  
parameters including “Typicalsmust be validated for each customer ap-  
plication by customer’s technical experts. Everspin Technologies does not  
convey any license under its patent rights nor the rights of others. Everspin  
Technologies products are not designed, intended, or authorized for use  
as components in systems intended for surgical implant into the body, or  
other applications intended to support or sustain life, or for any other ap-  
plication in which the failure of the Everspin Technologies product could  
create a situation where personal injury or death may occur. Should Buyer  
purchase or use Everspin Technologies products for any such unintended  
or unauthorized application, Buyer shall indemnify and hold Everspin Tech-  
nologies and its officers, employees, subsidiaries, affiliates, and distributors  
harmless against all claims, costs, damages, and expenses, and reasonable  
attorney fees arising out of, directly or indirectly, any claim of personal  
injury or death associated with such unintended or unauthorized use, even  
if such claim alleges that Everspin Technologies was negligent regarding  
the design or manufacture of the part. Everspin™ and the Everspin logo  
are trademarks of Everspin Technologies, Inc. All other product or service  
World Wide Information Request  
WW Headquarters - Chandler, AZ  
5670 W. Chandler Blvd., Suite 100  
Chandler, Arizona 85224  
Tel: +1-877-480-MRAM (6726)  
Local Tel: +1-480-347-1111  
Fax: +1-480-347-1175  
support@everspin.com  
Europe, Middle East and Africa  
Everspin Europe Support  
support.europe@everspin.com  
Japan  
Everspin Japan Support  
support.japan@everspin.com  
Asia Pacific  
Everspin Asia Support  
support.asia@everspin.com  
names are the property of their respective owners.  
Filename:  
EST00183_MR0A08B_Datasheet_Rev8.6032218  
Copyright © Everspin Technologies, Inc. 2018  
23  
Copyright © 2018 Everspin Technologies  
MR0A08B Rev. 8.6, 3/2018  

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