MCM6728B Motorola, MCM6728B Datasheet

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MCM6728B

Manufacturer Part Number
MCM6728B
Description
256K x 4 Bit Fast Static Random Access Memory
Manufacturer
Motorola
Datasheet
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
256K x 4 Bit Fast Static Random
Access Memory
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.
and is available in a 400 mil plastic small–outline J–leaded package.
MOTOROLA FAST SRAM
REV 2
5/95
The MCM6728B is a 1,048,576 bit static random access memory organized
This device meets JEDEC standards for functionality and revolutionary pinout,
Motorola, Inc. 1995
Single 5 V
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
E
DQ0
DQ3
W
A
A
A
A
A
A
A
A
A
10% Power Supply
DECODER
CONTROL
INPUT
DATA
ROW
BLOCK DIAGRAM
A
A
512 ROWS x 512 x 4
A
COLUMN DECODER
COLUMNS
MEMORY
MATRIX
COLUMN I/O
A
A
A
A
A
V CC
V SS
A
A0 – A17
E
W
DQ0 – DQ3
V CC
V SS
NC
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MCM6728B
. . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . .
DQ0
V CC
DQ1
V SS
W
PIN ASSIGNMENT
A
A
A
A
E
A
A
A
A
. . . . . . . . . . . . .
. . . . . . . .
PIN NAMES
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Order this document
+ 5 V Power Supply
WJ PACKAGE
Data Input/Output
CASE 810–03
400 MIL SOJ
28
27
26
25
24
23
22
21
20
19
18
17
16
15
by MCM6728B/D
No Connection
Address Input
Write Enable
MCM6728B
Chip Enable
A
A
A
A
A
DQ3
V SS
V CC
DQ2
A
A
A
A
A
Ground
1

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MCM6728B Summary of contents

Page 1

... 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 ...

Page 2

... V CC – 0.2 V) NOTES: 1. Reference AC Operating Conditions and Characteristics for input and timing ( pulse level 3.0 V). 2. All addresses transition simultaneously low (LSB) and then high (MSB). 3. Data states are all zero. MCM6728B 2 Output Cycle High–Z — ...

Page 3

... Typ Max Unit — — — 1.5 V See Figure 1A 6728B–12 Max Min Max Unit Notes — 12 — — — — 3 — ns — 3 — ns 4,5 4,5,6 TIMING LIMITS The table of timing values shows either a MCM6728B 3 ...

Page 4

... A (ADDRESS) Q (DATA OUT) PREVIOUS DATA VALID A (ADDRESS) E (CHIP ENABLE) Q (DATA OUT) MCM6728B 4 READ CYCLE 1 (See Note 7) t AVAV t AXQX t AVQV READ CYCLE 2 (See Note 8) t AVAV t ELQV t ELQX t AVQV DATA VALID t EHQZ DATA VALID MOTOROLA FAST SRAM ...

Page 5

... HIGH–Z 6728B–10 6728B–12 Max Min Max Unit Notes 10 — 12 — — 0 — — 10 — — 10 — — 6 — — 0 — 4,5,6 3 — 3 — ns 4,5,6 0 — 0 — WHAX t WHDX t WHQX MCM6728B 5 ...

Page 6

... If E goes low coincident with or after W goes low, the output will remain in a high impedance condition goes high coincident with or before W goes high, the output will remain in a high impedance condition. A (ADDRESS) E (CHIP ENABLE) W (WRITE ENABLE) D (DATA IN) Q (DATA OUT) MCM6728B 6 6728B–8 6728B–10 Symbol Min Max ...

Page 7

... MCM 6728B WJ Motorola Memory Prefix Part Number Full Part Numbers — MCM6728BWJ8 MCM6728BWJ8R Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “ ...

Page 8

... EUROPE: Motorola Ltd.; European Literature Centre; 88 Tanners Drive, Blakelands, Milton Keynes, MK14 5BP, England. JAPAN: Nippon Motorola Ltd.; 4–32–1, Nishi–Gotanda, Shinagawa–ku, Tokyo 141, Japan. ASIA PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Center, No. 2 Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong. MCM6728B 8 *MCM6728B/D* MCM6728B/D MOTOROLA FAST SRAM ...

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