AK594096BS Datasheet, PDF (1/2 Pages) ACCUTEK MICROCIRCUIT CORPORATION – 4,194,304 Word by 9 Bit CMOS Dynamic Random Access Memory

Accutek
Microcircuit
Corporation
DESCRIPTION
The Accutek AK594096 high density memory module is a CMOS
random access memory organized in 4 Meg x 9 bit words. The as-
sembly consists of two 4 Meg x 4 and one 4 Meg x 1 DRAMs,
mounted on the front side of a printed circuit board in 30 pad SIM
(leadless) or 30 pin SIP (leaded) configuration with
JEDEC-standard pinouts. Designed especially for low-height appli-
cations such as VMEbus boards, this low profile module is 0.550
inch high.
The operation is identical to nine 4 Meg x 1 DRAMs. For the lower
eight bits, data input is tied to data output and brought out sepa-
rately for each bit, with common RAS and CAS control. This com-
mon I/O feature dictates the use of early-write cycles to prevent
contention of data In and data out. Since the Write-Enable (WE)i
signal must always go low before CAS in a write cycle, Read-Write
and Read-Modify-Write operation is not possible. For the ninth bit,
data in (D₉) and data out (Q₉) pins are brought our separately and
controlled by a separate PCAS for that bit.
FEATURES
· 4,194,304 x 9 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, RAS and WE for the lower eight bits
· CAS-before-RAS refresh
· Refresh cycle 2048 cycles in 32 mSEC
AK594096BS / AK594096BG
4,194,304 Word by 9 Bit CMOS
Dynamic Random Access Memory
Front View
30-Pin SIM
+
+
30-Pin SIP
+
+
1
· Power
1.450 Watt Max Active, 70 nSEC
1.610 Watt Max Active, 60 nSEC
16.5 mWatt Max Standy
· Operating free air temperature 0⁰C to 70⁰C
· Downward compatible with AK591024 and AK59256
· Upward compatible with AK5916384
· Fast Page Mode and Static Column Mode versions available,
nibble mode is not possible
PIN NOMENCLATURE
PIN ASSIGNMENT
FUNCTIONAL DIAGRAM
A₀ - A₁₀
RAS₀
CAS
WE
OE
Address Inputs
1
Row Address Strobe
2
Column Address Strobe
3
4
Write Enable
5
Output Enable
6
Vcc
16
DQ5
A₀ - A_{10 +}
RAS ₊
11
A₀ - A₁₀
RAS
CAS
17
A8
CAS ₊
WE +
CAS
WE
DQ1
18
A9
DQ1 +
* ^DQ1
A0
19
A10
A1
20
DQ6
DQ2 +
DQ3 +
DQ4 +
* ^DQ2
* ^DQ3
* ^DQ4
OE *
DQ2
21
WE
DQ₁ - DQ₈
D₉
Q₉
Vcc
Vss
Data In/Data Out
Data In
Data Out
5v Supply
Ground
7
A2
22
Vss
8
A3
23
DQ7
9
Vss
24
NC
10
DQ3
25
DQ8
11
A4
26
NC
12
A5
27
RAS0
13
DQ4
28
NC
DQ5 +
DQ6 +
DQ7 +
DQ8 +
A₀ - A₉
RAS
CAS
WE
* DQ1
* ^DQ2
* ^DQ3
* DQ4
OE _*
NC
No Connect
MODULE OPTIONS
14
A6
29
NC
15
A7
30
Vcc
PCAS +
A₀ - A₁₁
RAS
CAS
WE
Leadless SIM: AK594096BS
Leaded SIP: AK594096BG
D9 +
Q9 +
*D
Q