1
White Electronic Designs Corporation (508) 366-5151 www.whiteedc.com
EDI8L32256C
NOT
RECOMMENDED
FOR
NEW
DESIGN
Features
256Kx32, 5V Static Ram
The EDI8L32256C is a high speed, 5V, 8 megabit SRAM.
The device is available with access times of 15, 17, 20 and
25ns, allowing the creation of a no wait state DSP memory
solution.
The device can be configured as a 256Kx32 and used to
create a single chip external data memory solution for
Texas Instruments' TMS320C30/31 (figure 3), TMS
320C32 (figure 4) or TMS320C4x (figure 5), Motorola's
DSP96002 and Analog Device's SHARC
TM
DSP (figure 6).
Alternatively the device's chip enables can be used to
configure it as a 512Kx16. A 512Kx48 program memory
array for Analog's SHARC
TM
DSP is created using three
devices (figure 7). If this memory is too deep, two 256Kx24s
(EDI8L24256C) can be used to create a 256Kx48 array or
two 128Kx24s (EDI8L24128C) can be used to create a
128Kx48 array.
The device provides a 32% space savings when com-
pared to two monolithic 256Kx16, 44 pin SOJs.
The device provides a memory upgrade of the
EDI8L32128C (128Kx32) and the EDI8L3265C (64Kx32).
For more memory the device can be upgraded to the
EDI8L32512C (512Kx32). For additional upgrade infor-
mation see figure 8.
256Kx32 bit CMOS Static
DSP Memory Solution
Texas Instruments TMS320C3x, TMS320C4x
Analog SHARC
TM
DSP
Motorola DSP96002
Random Access Memory Array
Fast Access Times: 15, 17, 20 and 25ns
Individual Byte Enables
User Configurable Organization
with Minimal Additional Logic
Master Output Enable and Write Control
TTL Compatible Inputs and Outputs
Fully Static, No Clocks
Surface Mount Package
68 Lead PLCC, No. 99, JEDEC MO-47AE
Small Footprint, 0.990 Sq. In.
Multiple Ground Pins for Maximum
Noise Immunity
Single +5V (5%) Supply Operation
Pin Names
A-A17
Address Inputs
E-E1
Chip Enables (One per Word)
BS-BS3
Byte Selects (One per Byte)
W
Master Write Enable
G
Master Output Enable
DQ-DQ31
Common Data Input/Output
VCC
Power (+5V5%)
VSS
Ground
N C
No Connection
Pin Configurations and Block Diagram
NOTE: Solder Reflow temperature should not exceed 230C for 10 seconds.
Note: For memory upgrade information refer to page 8,
Figure 8 "EDI MCM-L upgrade path".
February 1999 Rev. 5
ECO# 11254
2
White Electronic Designs Corporation (508) 366-5151 www.whiteedc.com
EDI8L32256C
Recommended DC Operating Conditions
Parameter Sym Min Typ Max Units
Supply Voltage VCC 4.75 5.0 5.25 V
Supply Voltage VSS 0 0 0 V
Input High Voltage VIH 2.2 -- VCC+0.5 V
Input Low Voltage VIL -0.3 -- 0.8 V
DC Electrical Characteristics
Parameter
Sym
Conditions
Min
Max
Units
15/17
20/25
Operating Power Supply Current
ICC1
W= VIL, II/O = 0mA,
575
480
mA
Min Cycle
Standby (TTL) Supply Current
ICC2
E VIH, VIN VIL or
120
120
mA
VIN VIH, f=MHz
Full StandbySupply Current
ICC3
E VCC-0.2V
20
20
mA
VIN VCC-0.2V or
VIN 0.2V
Input Leakage Current
ILI
VIN = 0V to VCC
10
A
Output Leakage Current
ILO
V I/O = 0V to VCC
10
A
Output High Volltage
VOH
IOH = -4.0mA
2.4
V
Output Low Voltage
VOL
IOL = 8.0mA
0.4V
Capacitance
(f=1.0MHz, VIN=VCC or VSS)
Parameter
Sym
Max
Unit
Address Lines
CA
20
pF
Data Lines
CD/Q
10
pF
Write & Output Enable Lines W, G
6
pF
Chip Enable Lines/Byte Select E, BS
9
pF
E W G BS-3 Mode Output Power
H X X
X Standby High Z ICC2, ICC3,
L H H
X Output Disable High Z ICC1
L X X
H Output Disable High Z ICC1
L H L
L
Read DOUT ICC1
L L X
L
Write DIN ICC1
X Means Don't Care
Absolute Maximum Ratings*
Voltage on any pin relative to VSS -0.5V to 7.0V
Operating Temperature TA (Ambient)
Commercial 0C to + 70C
Industrial -40C to +85C
Storage Temperature -55C to +125C
Power Dissipation 3 Watts
Output Current. 20 mA
Junction Temperature, TJ 175C
*Stress greater than those listed under "Absolute Maximum Ratings" may cause permanent
damage to the device. This is a stress rating only and functional operation of the device at
these or any other conditions greater than those indicated in the operational sections of this
specification is not implied. Exposure to absolute maximum rating conditions for extended
periods may affect reliability.
AC Test Conditions
(note: For TEHQZ,TGHQZ and TWLQZ, CL = 5pF)
Input Pulse Levels
VSS to 3.0V
Input Rise and Fall Times
5ns
Input and Output Timing Levels
1.5V
Output Load
Figure 1
Truth Table
3
White Electronic Designs Corporation (508) 366-5151 www.whiteedc.com
EDI8L32256C
AC Characteristics Read Cycle
Symbol
15ns
17ns
20ns
25ns
Parameter
JEDEC
Alt.
Min Max
Min Max
Min Max
Min Max
Units
Read Cycle Time
TAVAV TRC
15
17
20
25
ns
Address Access Time
TAVQV TAA
15
17
20
25
ns
Chip Enable Access Time
TELQV TACS
15
17
20
25
ns
Byte Select Access Time
TBLQX TBLZ
15
17
20
25
ns
Chip Enable to Output in Low Z (1)
TELQX TCLZ
3
3
3
3
ns
Byte Select to Output in Low Z
TBLQX TBLZ
3
3
3
3
ns
Chip Disable to Output in High Z (1)
TEHQZ TCHZ
8
8
10
10
ns
Byte Select to Output in High Z
TBHQZ TBHZ
8
8
10
10
ns
Output Hold from Address Change
TAVQX TOH
3
3
3
3
ns
Output Enable to Output Valid
TGLQV
TOE
6
8
10
10
ns
Output Enable to Output in Low Z (1)
TGLQX TOLZ
2
2
2
2
ns
Output Disable to Output in High Z(1)
TGHQZ TOHZ
5
6
8
10
ns
Read Cycle 2 - W High
Read Cycle 1 - W High, G, E Low
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White Electronic Designs Corporation (508) 366-5151 www.whiteedc.com
EDI8L32256C
AC Characteristics Write Cycle
Note 1: Parameter guaranteed, but not tested.
Write Cycle 1 - W Controlled
Symbol
15ns
17ns
20ns
25ns
Parameter
JEDEC
Alt.
Min Max Min Max Min Max Min Max Units
Write Cycle Time
TAVAV
TWC
15
17
20
25
ns
Chip Enable to End of Write
TELWH
TCW
9
10
15
20
ns
TELEH
TCW
9
10
15
20
ns
Byte Select to End of Write
TBLWH
TBW
9
10
15
20
ns
Address Setup Time
TAVWL
TAS
0
0
0
0
ns
TAVEL
TAS
0
0
0
0
ns
Address Valid to End of Write
TAVWH
TAW
10
12
15
15
ns
TAVEH
TAW
10
12
15
15
ns
Write Pulse Width
TWLWH TWP
10
12
15
15
ns
TWLEH
TWP
10
12
15
15
ns
Write Recovery Time
TWHAX
TWR
0
0
0
0
ns
TEHAX
TWR
0
0
0
0
ns
Data Hold Time
TWHDX
TDH
0
0
0
0
ns
TEHDX
TDH
0
0
0
0
ns
Write to Output in High Z (1)
TWLQZ TWHZ
0
6
0
7
0
7
0
10 ns
Data to Write Time
TDVWH
TDW
6
8
8
12
ns
TDVEH
TDW
6
8
8
12
ns
Output Active from End of Write (1)
TWHQX TWLZ
2
2
2
2
ns
5
White Electronic Designs Corporation (508) 366-5151 www.whiteedc.com
EDI8L32256C
NOT
RECOMMENDED
FOR
NEW
DESIGN
Write Cycle 2 - E Controlled
Ordering Information
Commercial (0C to 70C)
Industrial (-40C to +85C)
Part Number
Speed
Package
(ns)
No.
EDI8L32256C15AC
15
99
EDI8L32256C17AC
17
99
EDI8L32256C20AC
20
99
EDI8L32256C25AC
25
99
Part Number
Speed
Package
(ns)
No.
EDI8L32256C17AI
17
99
EDI8L32256C20AI
20
99
EDI8L32256C25AI
25
99
Package Description
Package No. 99
68 Lead FLCC
JEDEC MO-47 AE
Weight = 4.2g
Theta J
A
= 40 C/W
Theta J
C
= 15 C/W
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