EDI8F8512C
512Kx8 STATIC RAM CMOS, MODULE
FEATURES
DESCRIPTION
n 512Kx8 bit CMOS Static
The EDI8F8512C is a 4096K bit CMOS Static RAM based on four
128Kx8 or 256Kx4 (high speed) Static RAMs mounted on a multi-
layered epoxy laminate (FR4) substrate.
n Random Access Memory
Access Times 20 through 100ns
Data Retention Function (EDI8F8512LP)
TTL Compatible Inputs and Outputs
Fully Static, No Clocks
Functional equivalence to the monolithic four megabit Static
RAM is achieved by utilization of an on-board decoder that
interprets the higher order address(es) to select one of the128Kx8
or 256Kx4 Static RAMs.
The 32 pin DIP pinout adheres to the JEDEC standard for the four
megabit device, to ensure compatibility with future monolithics.
n High Density Packaging
36 Pin SIP, No. 63
A low power version with data retention (EDI8F8512LP) is also
available.
32 Pin DIP, JEDEC Pinout, No. 91 (55-100ns)
32 Pin DIP, JEDEC Pinout, No. 183 (20-35ns)
n Single +5V (±10%) Supply Operation
All inputs and outputs are TTL compatible and operate from a
single 5V supply. Fully asynchronous, the EDI8F8512C requires
no clocks or refreshing for operation.
FIG. 1
PIN NAMES
PIN CONFIGURATIONS AND BLOCK DIAGRAM
AØ-A18
Address Inputs
Chip Enable
E
A18
A16
A14
A12
A7
A6
A5
A4
A3
1
2
3
4
5
6
7
8
9
VCC
A15
A17
W
A13
A8
A9
A11
G
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
NC
VCC
W
DQ2
DQ3
DQ0
A1
A2
A3
A4
VSS
DQ5
A10
A11
A5
A13
A14
NC
1
2
3
4
5
6
7
8
W
Write Enable
G
Output Enable
Common Data Input/Output
Power (+5V±10%)
Ground
DQØ-DQ7
VCC
VSS
NC
A2 10
A1 11
A0 12
DQ0 13
DQ1 14
DQ2 15
VSS 16
A10
E
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
No Connection
DQ7
DQ6
DQ5
DQ4
DQ3
A
0-17
W
256K x 4
DQ0-3
G
8F8512C Pin Config
A0-16
128K x 8
W
E
256K x 4
256K x 4
256K x 4
DQ4-7
G
A15
A16
A12
A18
A6
DQ1
VSS
A0
A7
A8
A9
DQ7
DQ4
DQ6
A17
VCC
G
128K x 8
128K x 8
128K x 8
DQ0-7
20-35ns
55-100ns
20-55ns
A18
A
17-A18
DECODER
DECODER
E
E
8F8512C Pin Config.
8F8512C Blk Dia2
8F8512C Blk Dia
White Electronic Designs Corporation (508) 366-5151 www.whiteedc.com
July 2002 Rev. 13A
ECO #15405
1