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參數(shù)資料
| 型號(hào)： | CYM1841V33 |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | 256K x 32 3.3V Static RAM Module(256K x 32 位3.3V 靜態(tài)RAM模塊) |
| 中文描述： | 256K × 32 3.3靜態(tài)存儲(chǔ)器模塊（256K × 32位3.3V的靜態(tài)內(nèi)存模塊） |
| 文件頁(yè)數(shù)： | 1/7頁(yè) |
| 文件大小： | 115K |
| 代理商： | CYM1841V33 |
256K x 32 3.3V Static RAM Module
CYM1841V33
Cypress Semiconductor Corporation
3901 North First Street
San Jose
CA 95134
408-943-2600
March 16, 1999
3
Features
High-density 3.3V 8-megabit SRAM module
High-speed SRAM Module
—Access time of 15 ns
Low active power
—1.368W (max.) at 15 ns
64 pins
Available in ZIP format
Functional Description
The CYM1841V33 is a high-performance 3.3V 8-megabit stat-
ic RAM module organized as 256K words by 32 bits. This mod-
ule is constructed from two 256K x 16 SRAMs in SOJ packag-
es mounted on an epoxy laminate substrate. Four Chip Selects
are used to independently enable the four bytes. Reading or
writing can be executed on individual bytes or any combination
of multiple bytes through proper use of selects.
The CYM1841V33 is designed for use with standard 64-pin
ZIP sockets. The pinout is compatible with the 64-pin JEDEC
ZIP module family (CYM1821, CYM1831, CYM1836, and
CYM1841). Thus, a single motherboard design can be used to
accommodate memory depth ranging from 16K words
(CYM1821) to 256K words (CYM1841). The CYM1841V33 is
offered in a vertical ZIP configuration.
Presence Detect Pins (PD
0
PD
1
) are used to identify module
memory density in applications where modules with alternate
word depths can be interchanged.
Logic BlockDiagram
Pin Configuration
OE
WE
CS
3
CS
1
18
16
CS
2
CS
4
PD
0
GND
PD
1
GND
256K x 16
BHE
BLE
A
[0:17]
OE
WE
16
256K x 16
BHE
BLE
A
[0:17]
OE
WE
64-pin ZIP
Top View
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
56
58
60
62
64
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
49
51
53
55
57
59
61
63
PD
0
I/O
0
I/O
1
I/O
2
I/O
3
V
CC
A
7
A
8
A
9
I/O
4
I/O
5
I/O
6
I/O
7
WE
A
14
CS
1
GND
PD
1
I/O
8
I/O
9
I/O
10
I/O
11
A
0
A
1
A
2
I/O
12
I/O
13
I/O
14
I/O
15
GND
A
15
CS
2
A
4
17
OE
I/O
24
I/O
25
I/O
26
I/O
27
A
3
A
4
A
5
V
CC
A
6
I/O
28
I/O
29
I/O
30
I/O
31
CS
3
A
16
GND
I/O
16
I/O
17
I/O
18
I/O
19
A
10
A
11
A
12
A
13
I/O
20
I/O
21
I/O
22
I/O
GND
1841V33–1
1841V33–2
A
0
-A
17
I/O
0
–I/O
15
I/O
16
–I/O
21
Selection Guide
1841V33-15
15
380
200
1841V33-20
20
340
200
1841V33-25
25
300
200
1841V33-35
35
270
200
Maximum Access Time (ns)
Maximum Operating Current (mA)
Maximum Standby Current (mA)
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