AK5916384S Datasheet, PDF (1/2 Pages) ACCUTEK MICROCIRCUIT CORPORATION – 16,777,216 Word by 9 Bit CMOS Dynamic Random Access Memory

Accutek
Microcircuit
Corporation
DESCRIPTION
The Accutek AK5916384S high density memory module is a CMOS
random access memory organized in 16 Meg x 9 bit words. The as-
sembly consists of nine 16 Meg x 1 DRAMs in plastic SOJ packages
mounted on the front side of a printed circuit board in 30 pad SIM
(leadless) or 30 pin SIP (leaded) configuration. The module is only
0.8 inch high (same height as standard 1 Meg modules), making it
ideally suited for applications with low height restrictions.
The operation of the AK5916384 is identical to nine 16 Meg x 1
dynamic RAMs. For the lower eight bits data input is tied to data
output and brought out separately for each device, with common
RAS, CAS and WE control. This common I/O feature dictates the
use of early-write cycles to prevent contention of D and Q. 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. For the ninth bit, the data input (D₉) and the data output
(Q₉) pins are brought out separately and controlled by a separate
PCAS for that bit. Bit nine is generally used for parity.
FEATURES
· 16,777,216 x 9 bit organization
· Optional 30 Pad leadless SIM (Single In-Line Module) or 30
Pin leaded SIP (Single In-Line Package)
· JEDEC standard pinout
· Common CAS and RAS control for the lower eight bits
· Separate PCAS control for D₉ and Q₉
· CAS-before-RAS refresh
AK5916384S / AK5916384G
16,777,216 Word by 9 Bit CMOS
Dynamic Random Access Memory
Front View
30-Pin SIM
1
30
30-Pin SIP
1
· Downward compatible with AK594096, AK591024, and
AK59256
· TTL-Compatible Inputs and Outputs
· RAS-Only Refresh
· 4096 Cycle Refresh every 64mSEC
· Power:
4.45 Watt Max Active (60 nS)
3.96 Watt Max Active (70 nS)
49.5 mWatt Max Standby
· Operating free air temperature 0^oC to 70^oC
· Fast Page Mode
· 8 Bit version (without parity bit) also available
PIN NOMENCLATURE
PIN ASSIGNMENT
DQ1 - DQ8
D9
Q9
Data In/Data Out
Data In
Data Out
PIN #
1
2
3
SYMBOL
Vcc
CAS
DQ1
PIN #
16
17
18
A0 - A11
Address Inputs
4
5
CAS, PCAS
Column Address Strobe
6
RAS
Row Address Strobe
7
A0
19
A1
20
DQ2
21
A2
22
WE
Write Enable
Vcc
5v Supply
Vss
Ground
8
A3
23
9
Vss
24
10
DQ3
25
11
A4
26
NC
No Connect
12
A5
27
13
DQ4
28
MODULE OPTIONS
14
A6
29
15
A7
30
Leadless SIM: AK5916384S
Leaded SIP: AK5916384G
SYMBOL
DQ5
A8
A9
A10
DQ6
WE
Vss
DQ7
A11
DQ8
Q9
RAS
PCAS
D9
Vcc
FUNCTIONAL DIAGRAM