MCM6728B Datasheet, PDF (1/8 Pages) Motorola, Inc – 256K x 4 Bit Fast Static Random Access Memory

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
256K x 4 Bit Fast Static Random
Access Memory
The MCM6728B is a 1,048,576 bit static random access memory organized
as 262,144 words of 4 bits. This device is fabricated using high performance sili-
con–gate BiCMOS technology. Static design eliminates the need for external
clocks or timing strobes.
This device meets JEDEC standards for functionality and revolutionary pinout,
and is available in a 400 mil plastic small–outline J–leaded package.
• Single 5 V ± 10% Power Supply
• Fully Static — No Clock or Timing Strobes Necessary
• All Inputs and Outputs Are TTL Compatible
• Three State Outputs
• Fast Access Times: 8, 10, 12 ns
• Center Power and I/O Pins for Reduced Noise
BLOCK DIAGRAM
A
A
VCC
VSS
A
A
MEMORY
A
ROW
MATRIX
DECODER
512 ROWS x 512 x 4
A
COLUMNS
A
A
A
DQ0
COLUMN I/O
INPUT
DATA
COLUMN DECODER
CONTROL
DQ3
A A A A AAA A A
E
W
Order this document
by MCM6728B/D
MCM6728B
WJ PACKAGE
400 MIL SOJ
CASE 810–03
PIN ASSIGNMENT
A1
A2
A3
A4
E5
DQ0 ₆
VCC ₇
VSS ₈
DQ1 ₉
W ₁₀
A ₁₁
A ₁₂
A ₁₃
A ₁₄
28 ^A
27 ^A
26 ^A
25 ^A
24 ^A
23 ^DQ3
22 ^VSS
21 ^VCC
20 ^DQ2
19 ^A
18 ^A
17 ^A
16 ^A
15 ^A
PIN NAMES
A0 – A17 . . . . . . . . . . . . . Address Input
E . . . . . . . . . . . . . . . . . . . . . . Chip Enable
W . . . . . . . . . . . . . . . . . . . . Write Enable
DQ0 – DQ3 . . . . . . . . Data Input/Output
VCC . . . . . . . . . . . . + 5 V Power Supply
VSS . . . . . . . . . . . . . . . . . . . . . . . Ground
NC . . . . . . . . . . . . . . . . . No Connection
REV 2
5/95
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MCM6728B
1