cym1861v33 Cypress Semiconductor Corporation., cym1861v33 Datasheet

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cym1861v33

Manufacturer Part Number
cym1861v33
Description
2,048k X 32 3.3v Static Ram Module
Manufacturer
Cypress Semiconductor Corporation.
Datasheet
Features
Functional Description
The CYM1861V33 is a high-performance 3.3V 64-megabit
static RAM module organized as 2,048K words by 32 bits. This
module is constructed from sixteen 1,024K x 4 SRAMs in SOJ
Cypress Semiconductor Corporation
• High-density 3.3V 64-megabit SRAM module
• 32-bit Standard Footprint supports densities from 16K
• High-speed SRAMs
• 72 pins
• Available in SIMM format
A
x 32 through 2M x 32
CS
WE
— Access time of 20 ns
OE
Logic Block Diagram
0
–A
A
1
20
–CS
19
4
PAL
Buffer
20
1M x 4
1M x 4
1M x 4
SRAM
SRAM
SRAM
1M x 4
SRAM
4
4
4
4
4
4
4
4
3901 North First Street
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
PRELIMINARY
8
0
16
12
20
4
24
28
2,048K x 32 3.3V Static RAM Module
– I/O
– I/O
– I/O
I/O
I/O
I/O
I/O
I/O
3
11
7
19
15
23
27
31
packages mounted on an epoxy laminate substrate. Four chip
selects are used to independently enable the four bytes. Read-
ing or writing can be executed on individual bytes or any com-
bination of multiple bytes through proper use of selects.
The CYM1861V33 is designed for use with standard 72-pin
SIMM sockets. The pinout is downward compatible with the
64-pin JEDEC SIMM module family (CYM1821, CYM1831,
CYM1836, and CYM1841). Thus, a single motherboard de-
sign can be used to accommodate memory depth ranging from
16K words (CYM1821) to 2,048K words (CYM1861V33). The
CYM1861V33 is offered in vertical SIMM configuration and is
available with tin-lead edge contacts.
Presence detect pins (PD
memory density in applications where modules with alternate
word depths can be interchanged.
PD
PD
PD
PD
1M x 4
1M x 4
1M x 4
SRAM
SRAM
SRAM
1M x 4
SRAM
0
1
2
3
- OPEN
- GND
- GND
- OPEN
1861V33–1
San Jose
4
4
4
4
4
4
4
4
Pin Configuration
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
8
0
12
16
4
20
24
28
– I/O
– I/O
– I/O
I/O
I/O
I/O
I/O
I/O
0
3
11
7
–PD
15
19
23
27
31
CA 95134
GND
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
GND
3
PD
PD
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
CS
CS
V
) are used to identify module
WE
A
A
A
A
A
A
A
NC
NC
CC
A
A
A
14
16
16
17
18
19
10
11
12
13
20
21
22
23
19
3
0
0
1
2
3
7
8
9
4
5
6
7
1
3
CYM1861V33
ZIP/SIMM
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
66
68
70
72
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
1
3
5
7
9
June 30, 1998
408-943-2600
NC
PD
GND
PD
I/O
I/O
I/O
I/O
A
A
A
I/O
I/O
I/O
I/O
GND
A
CS
CS
A
OE
I/O
I/O
I/O
I/O
A
A
A
V
A
I/O
I/O
I/O
I/O
A
A
1861V33–2
0
1
2
15
17
3
4
5
CC
6
18
20
2
1
8
9
10
11
12
13
14
15
24
25
26
27
28
29
30
31
2
4

Related parts for cym1861v33

cym1861v33 Summary of contents

Page 1

... Read- ing or writing can be executed on individual bytes or any com- bination of multiple bytes through proper use of selects. The CYM1861V33 is designed for use with standard 72-pin SIMM sockets. The pinout is downward compatible with the 64-pin JEDEC SIMM module family (CYM1821, CYM1831, CYM1836, and CYM1841) ...

Page 2

... CC IH Min. Duty Cycle = 100% Max > V 0.2V > V 0.2V < 0.2V IN Test Conditions MHz 3. CYM1861V33 1861V33-20 1861V33- 2400 2400 1050 1050 Ambient Temperature + 10% –5% Min. Max. 2.4 0.4 2 0.3 CC –0.3V 0.8 –10 +10 –20 ...

Page 3

... These parameters are guaranteed and not 100% tested. HZCS LZCS 3 CYM1861V33 ALL INPUT PULSES 90% 10% < 1861V33-25 Max. Min. Max ...

Page 4

... WE is HIGH for read cycle. 8. Device is continuously selected and OE Address valid prior to or coincident with CS transition LOW. PRELIMINARY OHA t RC ACS t DOE t LZOE 50 CYM1861V33 DATA VALID t HZOE t HZCS HIGH IMPEDANCE DATA VALID t PD 50% 1861V33–5 ICC ISB 1861V33–6 ...

Page 5

... Data Out Read Data In Write High Z Deselect PRELIMINARY SCS PWE t SD DATA VALID t HZWE SCS PWE t SD DATA VALID t HZWE Mode 5 CYM1861V33 LZWE HIGH IMPEDANCE 1861V33– HIGH IMPEDANCE 1861V33–8 ...

Page 6

... Semiconductor products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress Semiconductor against all charges. PRELIMINARY Package Type Package Type PM48 72-Pin Plastic SIMM Module PM48 72-Pin Plastic SIMM Module 72-Pin SIMM Module PM48 CYM1861V33 Operating Range Commercial Commercial ...

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