mr2a16a ETC-unknow, mr2a16a Datasheet - Page 2

• Manufacturer Part Number: mr2a16a
• Description: 256k X 16-bit 3.3-v Asynchronous Magnetoresistive Ram
• Manufacturer: ETC-unknow

Device Pin Assignment
Device Pin Assignment
2
DQL0
DQL1
DQL2
DQL3
DQL4
DQL5
DQL6
DQL7
A16
A17
A10
A11
A12
V
V
A0
A1
A2
A3
A4
DD
SS
W
E
A[17:0]
18
UB
LB
W
G
E
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
ADDRESS
BUFFERS
OUTPUT
ENABLE
BUFFER
ENABLE
BUFFER
ENABLE
BUFFER
ENABLE
BUFFER
WRITE
BYTE
CHIP
UB
LB
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
Figure 2. MR2A16A in 44-Pin TSOP Type II Package
A15
A14
A13
G
UB
LB
DQU15
DQU14
DQU13
DQU12
V
V
DQU11
DQU10
DQU9
DQU8
NC
A9
A8
A7
A6
A5
SS
DD
10
8
DECODER
ROW
Figure 1. Block Diagram
UPPER BYTE WRITE ENABLE
LOWER BYTE WRITE ENABLE
256K x 16
MEMORY
ARRAY
MR2A16A/D, Rev. 0.1
BIT
UPPER BYTE OUTPUT ENABLE
LOWER BYTE OUTPUT ENABLE
COLUMN
DECODER
16
A[17:0]
E
W
G
UB
LB
DQL[7:0]
DQU[15:8]
V
V
NC
16
DD
SS
Signal Name
DRIVERS
SENSE
WRITE
AMPS
FINAL
Table 1. Pin Functions
8
8
8
8
OUTPUT
BUFFER
OUTPUT
BUFFER
DRIVER
DRIVER
LOWER
LOWER
UPPER
UPPER
WRITE
WRITE
BYTE
BYTE
BYTE
BYTE
Address input
Chip enable
Write enable
Output enable
Upper byte select
Lower byte select
Data I/O, lower byte
Data I/O, upper byte
+3.3-V power supply
Ground
Do not connect this pin
8
Function
8
8
8
Freescale Semiconductor
DQU[15:8]
DQL[7:0]