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參數(shù)資料
| 型號： | CYM1846 |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | 512K x 32 Static RAM Module(512K x 32 位靜態(tài)模塊) |
| 中文描述： | 512k × 32的靜態(tài)RAM模塊（512k × 32的位靜態(tài)模塊） |
| 文件頁數(shù)： | 1/7頁 |
| 文件大?。?/td> | 136K |
| 代理商： | CYM1846 |
512K x 32 Static RAM Module
fax id: 2018
CYM1846
Cypress Semiconductor Corporation
3901 North First Street
San Jose
CA 95134
408-943-2600
December 1994 - Revised October 10, 1997
Features
High-density 16-megabit SRAM module
32-bit standard footprint supports from 16Kx32 through
1Mx32
High-speed SRAMs
—Access time of 12 ns
Low active power
—4.4W (max.) at 12 ns
Compatible with CYM1821, CYM1831, CYM1836,
CYM1841, and CYM1851 JEDEC modules
Available in 72-pin ZIP or SIMM/Angled SIMM
Functional Description
The CYM1846 is a high-performance 16-megabit static RAM
module organized as 512K words by 32 bits. This module is
constructed from four 512K x 8 SRAMs in SOJ packages
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 the chip selects.
The CYM1846 is designed for use with standard 72-pin SIMM
socket and ZIP footprint. The pinout is compatible with the
64-pin JEDEC ZIP/SIMM module family (CYM1821,
CYM1831, CYM1836, and CYM1841) and the 72-pin
CYM1851. Thus, a single motherboard design can be used to
accommodate memory depth ranging from 16K words
(CYM1821) to 1024K words (CYM1851). The standard SIMM
can be used in Angled SIMM sockets and is available with
either tin-lead or 10 micro-inches of gold flash on the edge
contacts.
Presence detect pins (PD
0
– PD
3
) are used to identify module
memory density in applications where modules with alternate
word depths can be interchanged.
Logic Block Diagram
Pin Configuration
A
0
– A
18
1846–1
OE
WE
I/O
0
– I/O
7
CS
3
CS
1
19
8
8
8
8
CS
2
CS
4
I/O
8
– I/O
15
I/O
16
– I/O
23
I/O
24
– I/O
31
PD
0
– OPEN
PD
1
– OPEN
PD
2
– GND
PD
3
– OPEN
512Kx8
SRAM
512Kx8
SRAM
512Kx8
SRAM
512Kx8
SRAM
ZIP/SIMM
Top View
NC
PD
3
PD
0
I/O
0
I/O
1
I/O
2
I/O
3
V
CC
7
A
8
A
9
I/O
4
I/O
5
A
4
A
5
PD
GND
PD
1
I/O
8
I/O
9
11
A
0
A
1
A
2
I/O
12
I/O
13
I/O
10
I/O
6
I/O
7
WE
A
14
CS
1
GND
A
15
CS
2
CS
4
A
17
OE
I/O
24
I/O
25
I/O
26
I/O
27
A
3
NC
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
66
68
70
72
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
65
67
69
71
CS
3
A
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
23
GND
NC
I/O
14
I/O
V
CC
A
6
I/O
28
I/O
29
I/O
30
I/O
31
A
18
NC
NC
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PDF描述 |
|---|---|
| CYM1851PM-12C | 1,024K x 32 Static RAM Module |
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| CYM1851PZ-25C | 1,024K x 32 Static RAM Module |
| CYM1851PZ-35C | 1,024K x 32 Static RAM Module |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CYM1846P | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Memory |
| CYM1846P8-12C | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x32 SRAM Module |
| CYM1846P8-15C | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SRAM|512KX32|CMOS|SSIM|72PIN|PLASTIC |
| CYM1846P8-20C | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x32 SRAM Module |
| CYM1846P8-25C | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SRAM|512KX32|CMOS|SSIM|72PIN|PLASTIC |
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