AK584096BS Datasheet, PDF (1/2 Pages) ACCUTEK MICROCIRCUIT CORPORATION – 4,194,304 Word by 8 Bit CMOS Dynamic Random Access Memory

Accutek
Microcircuit
Corporation
DESCRIPTION
The Accutek AK584096 high density memory module is a CMOS
dynamic RAM organized in 4 Meg x 8 bit words. The assembly con-
sists of two 4 Meg x 4 DRAMS, mounted on the front side of a printed
circuit board in 30 pad SIM (leadless) or 30 pin SIP (leaded) configu-
ration with JEDEC-standard pinouts. Designed especially for
low-height applications such as VMEbus boards, this low profile
module is 0.550 inch high.
The operation is identical to eight 4 Meg x 1 DRAMs. The data in-
put/output is brought out separately for each bit, with common RAS ,
CAS and WE control. This common I/O feature dictates the use of
early-write cycles to prevent contention of Data In and Data Out.
Since the Write-Enable (WE) signal must always go low before CAS
in a write cycle, Read-Write and Read-Modify-Write operation is not
possible.
FEATURES
· 4,194,304 x 8 bit organization
· Low Profile 30 pad (SIM) Single In-Line Memory
· Low Profile 30 pin (SIP) Single In-Line package
· JEDEC standard pinout
· Common CAS and RAS control for eight common DQ Lines
· CAS-before-RAS refresh
· Refresh cycle 2048 cycles in 32 mSEC
AK584096BS / AK584096BG
4,194,304 Word by 8 Bit CMOS
Dynamic Random Access Memory
Front View
30-Pin SIM
+
+
30-Pin SIP
+
+
1
· Power
0.095 Watt Max Active, 70 nSEC
1.060 Watt Max Active, 60 nSEC
11.0 mWatt Max Standy
· Operating free air temperature 0⁰C to 70⁰C
· Downward compatible with AK581024 and AK58256
· Upward compatible with AK5816384
· Fast Page Mode and Static Column Mode versions available,
nibble mode is not possible
PIN NOMENCLATURE
PIN ASSIGNMENT
A₀ - A₁₀
Address Inputs
RAS₀
Row Address Strobe
1
Vcc
16
CAS
WE
Column Address Strobe ²
3
Write Enable
4
CAS
17
DQ1
18
A0
19
OE
DQ₁ - DQ₈
Vcc
Output Enable
Data In/Data Out
5v Supply
5
A1
20
6
DQ2
21
7
A2
22
8
A3
23
Vss
Ground
NC
No Connect
9
Vss
24
10
DQ3
25
11
A4
26
12
A5
27
MODULE OPTIONS
13
DQ4
28
14
A6
29
Leadless SIM: AK584096BS
15
A7
30
Leaded SIP: AK584096BG
DQ5
A8
A9
A10
DQ6
WE
Vss
DQ7
NC
DQ8
NC
RAS0
NC
NC
Vcc
FUNCTIONAL DIAGRAM