AK532256AW_09 Datasheet, PDF (1/2 Pages) ACCUTEK MICROCIRCUIT CORPORATION – Dynamic Random Access Memory

ACCUTEK
MICROCIRCUIT CORPORATION
AK532256AW
262,144 Word by 32 Bit CMOS
Dynamic Random Access Memory
DESCRIPTION
The Accutek AK532256AW high density memory module is a
CMOS dynamic RAM organized in 265K x 32 bit words. The module
consists of two standard 256K x 16 bits DRAMs in plastic SOJ pack-
ages. The assembly has 2 DRAMs mounted on the front side of a
+
+
printed circuit board in a 72 pad leadless SIM configuration.
This configuration allows socket-mounting of large quantities of
1
72
memory in applications where high density and ease of inserting ad-
ditional memory are important.
The operation of the AK532256AW is identical to eight 256K x 4
Drams. There are four CAS lines and two RAS lines. On each bank
of 256K x 32, independent byte control is accomplished by four CAS
lines. Each seperate CAS line controls one byte of the 256K x 16
Dram.
FEATURES
· 262,144 x 32 bit organization
· 72 pad Single In-Line Module
· CAS-before-RAS, RAS-only or hidden refresh
· Operating free air temperature 0^oC to 70^oC
· Single 5 Volt Power Supply
· 1024 Refresh Cycles, 16 mSEC
· Available in Fast Page Mode
· Power: 2.090 Watt Max Active (50 nS)
1.870 Watt Max Active (60 nS)
1.760 Watt Max Active (70 nS)
22 mW Max Standby
· Available in Fast Page Mode or EDO
· Upward compatible with AK532512W, AK5321024W,
AK5322048W, AK5324096W and AK5328192W
ADDITIONAL OPTIONS AVAILABLE
· 256K x 36 version, AK536256W
· 512K x 32 version, AK532512W
· 512K x 36 version, AK536512W
PIN NOMENCLATURE
PIN ASSIGNMENT
DQ0 - DQ31
A0 - A8
CAS0 - CAS3
RAS0, RAS2
WE
PD1 - PD4
Vcc
Vss
NC
Data In/Data Out
Address Inputs
Column Address Strobe
Row Address Strobe
Write Enable
Presence Detect
5v Supply
Ground
No Connect
MODULE OPTIONS
Leadless SIM: AK532256AW
Leaded ZIP: AK532256AZ
PIN #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
SYMBOL
Vss
DQ0
DQ16
DQ1
DDQ17
DQ2
DQ18
DQ3
DQ19
Vcc
NC
A0
A1
A2
A3
A4
A5
A6
Presence Detect -
-60
PD1
Vss
PD2
NC
PD3
NC
PD4
NC
PIN #
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
-70
Vss
NC
Vss
NC
SYMBOL
NC
DQ4
DQ20
DQ5
DQ21
DQ6
DQ22
DQ7
DQ23
A7
NC
Vcc
A8
NC
NC
RAS2
NC
NC
-80
Vss
NC
NC
Vss
PIN #
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
SYMBOL
NC
NC
Vss
CAS0
CAS2
CAS3
CAS1
RAS0
NC
NC
WE
NC
DQ8
DQ24
DQ9
DQ25
DQ10
DQ26
PIN #
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
SYMBOL
DQ11
DQ27
DQ12
DQ28
Vcc
DQ29
DQ13
DQ30
DQ14
DQ31
DQ15
NC
PD1
PD2
PD3
PD4
NC
Vss