PDM41028 Datasheet, PDF (1/8 Pages) List of Unclassifed Manufacturers – 1 Megabit Static RAM 256K x 4-Bit

Features
n High speed access times
Com’l: 10, 12 and 15 ns
Ind’l: 12 and 15 ns
n Low power operation (typical)
- PDM41028SA
Active: 400 mW
Standby: 150 mW
- PDM41028LA
Active: 350 mW
Standby: 100 mW
n Single +5V (±10%) power supply
n TTL-compatible inputs and outputs
n Packages
Plastic SOJ (300 mil) - TSO
Plastic SOJ (400 mil) - SO
PDM41028
1 Megabit Static RAM
256K x 4-Bit
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Description
2 ^{The PDM41028 is a high-performance CMOS static}
RAM organized as 262,144 x 4 bits. Writing to this
device is accomplished when the write enable (WE)
and the chip enable (CE) inputs are both LOW.
3 ^{Reading is accomplished when WE remains HIGH}
and CE and OE are both LOW.
The PDM41028 operates from a single +5V power
supply and all the inputs and outputs are fully TTL-
4 ^{compatible. The PDM41028 comes in two versions,}
the standard power version PDM41028SA and a low
power version the PDM41028LA. The two versions
are functionally the same and only differ in their
power consumption.
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The PDM41028 is available in a 28-pin 300-mil SOJ,
and a 28-pin 400-mil SOJ for surface mount
applications.
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Functional Block Diagram
A₀
•
•
Addresses
•
•
•
A₁₇
I/O₀
I/O₁
I/O₂
I/O₃
Decoder
Input
Data
Control
• ^Memory
•
•
•
Matrix
•
•
•••••
Column I/O
CE
WE
OE
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8
9
10
11
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Rev. 2.2 - 4/29/98
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