EDI8L32128V 데이터 시트보기 (PDF) - White Electronic Designs Corporation
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EDI8L32128V Datasheet PDF : 6 Pages
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EDI8L32128V
Features
128Kx32 bit CMOS Static
Analog SHARCTM 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
Pin Configurations and
Block Diagram
128Kx32 CMOS High Speed
Static RAM
The EDI8L32128V is a high speed, 3.3 volt, 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.
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
Note: Pin 2 & 67 on the 64Kx32 (EDI8L3265C) and the 256Kx32
(EDI8L32256C) are word select pins.
April 2001 Rev. 5
ECO #8366
1
White Electronic Designs Corporation (508) 366-5151 www.whiteedc.com
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