AK532256AW Datasheet, PDF (1/2 Pages) ACCUTEK MICROCIRCUIT CORPORATION – 262,144 Word by 32 Bit CMOS Dynamic Random Access Memory

Accutek
Microcircuit
Corporation
DESCRIPTION
The Accutek AK532256AW high density memory module is a
CMOS dynamic RAM organized in 265K x 32 bit words. The mod-
ule consists of two standard 256K x 16 bits DRAMs in plastic SOJ
packages. 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
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
AK532256AW
262,144 Word by 32 Bit CMOS
Dynamic Random Access Memory
1
72
· 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
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 ASSIGNMENT
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