EDI8L32128V Datasheet, PDF (1/7 Pages) White Electronic Designs Corporation – 128Kx32 CMOS High Speed Static RAM

White Electronic Designs
EDI8L32128V
128Kx32 CMOS High Speed Static RAM
FEATURES
128Kx32 bit CMOS Static
Analog SHARC^TM External Memory Solution
ADSP-21060L
ADSP-21062L
Random Access Memory Array
Fast Access Times: 12, 15 and 20ns
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 3.3V (±5%) Supply Operation
DESCRIPTION
The EDI8L32128V is a high speed, 3.3V, four megabit
density Static RAM. The device is available with access
times of 12, 15 and 20ns, allowing the device to support
60MHZ DSPs with no wait states. The high speed, 3.3V
supply voltage and byte configurability make the device
ideal for interfacing with Analog Devices ADSP-21062L or
ADSP-21060L SHARC DSPs.
The device can be configured as a 128Kx32 and used to
create a single chip external data memory solution for the
SHARC (figure 1). Providing a 51% space savings when
compared to four 128Kx8, 400mil wide plastic SOJs. The
EDI8L32128V has a 10pf load on the data lines vs. 24pf for
four plastic SOJs. Memory upgrades in the same footprint
can be accomplished with the EDI8L32256V (256Kx32) or
the EDI8L32512V (512KX32). This is covered in detail in
the application report "The EDI's x32 MCM-L SRAM Family:
Integrated Memory Solution for the Analog SHARC DSP"
Alternatively the device's chip enables can configure it as a
256Kx16. A 256Kx48 program memory array for the SHARC
is created using three devices (figure 2). If this memory is
too deep, two 128Kx24's (EDI8L24128V) can be used to
create a 128Kx48 memory array.
PIN CONFIGURATIONS AND
BLOCK DIAGRAM
DQ17 10
DQ18 11
DQ19 12
VSS 13
DQ20 14
DQ21 15
DQ22 16
DQ23 17
VCC 18
DQ24 19
DQ25 20
DQ26 21
DQ27 22
VSS 23
DQ28 24
DQ29 25
DQ30 26
60 DQ14
59 DQ13
58 DQ12
57 VSS
56 DQ11
55 DQ10
54 DQ9
53 DQ8
52 VCC
51 DQ7
50 DQ6
49 DQ5
48 DQ4
47 VSS
46 DQ3
45 DQ2
44 DQ1
Note: Solder Reflow temperature should not exceed 260°C for 10 seconds
PIN NAMES
AØ-A16
EØ#-E3#
W#
G#
DQØ-DQ31
VCC
VSS
NC
Address Inputs
Chip Enables (One per Byte)
Master Write Enable
Master Output Enable
Common Data Input/Output
Power (+3.3V±10%)
Ground
No Connection
A0-A16 ₁₇
G#
W#
E0#
E1#
E2#
E3#
128Kx32
Memory
Array
DQ0-DQ7
DQ8-DQ15
DQ16-DQ23
DQ24-DQ31
Note: Pin 2 & 67 on the 64Kx32 (EDI8L3265C) and the 256Kx32 (EDI8L32256C) are
word select pins.
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
July 2004
Rev. 6
1
White Electronic Designs Corporation • [phone] • www.wedc.com