MCM6729B Просмотр технического описания (PDF) - Motorola => Freescale
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MCM6729B Datasheet PDF : 7 Pages
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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
256K x 4 Bit Fast Static Random
Access Memory
The MCM6729B is a 1,048,576 bit static random access memory organized
as 262,144 words of 4 bits. Static design eliminates the need for external clocks
or timing strobes.
Output enable (G) is a special control feature that provides increased system
flexibility and eliminates bus contention problems.
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
DQ
COLUMN I/O
INPUT
DATA
COLUMN DECODER
CONTROL
DQ
A A A A AAA AA
E
W
G
Order this document
by MCM6729B/D
MCM6729B
WJ PACKAGE
400 MIL SOJ
CASE 857A–02
PIN ASSIGNMENT
NC 1
A2
A3
A4
A5
E6
DQ 7
VCC 8
VSS 9
DQ 10
W 11
A 12
A 13
A 14
A 15
NC 16
32 A
31 A
30 A
29 A
28 A
27 G
26 DQ
25 VSS
24 VCC
23 DQ
22 A
21 A
20 A
19 A
18 A
17 NC
PIN NAMES
A . . . . . . . . . . . . . . . . . . . . . Address Input
E . . . . . . . . . . . . . . . . . . . . . . Chip Enable
W . . . . . . . . . . . . . . . . . . . . Write Enable
G . . . . . . . . . . . . . . . . . . . Output Enable
DQ . . . . . . . . . . . . . . . Data Input/Output
VCC . . . . . . . . . . . . + 5 V Power Supply
VSS . . . . . . . . . . . . . . . . . . . . . . . Ground
NC . . . . . . . . . . . . . . . . . . No Connection
REV 4
4/7/97
M© OMoTtoOroRla,OInLc.A19F97AST SRAM
MCM6729B
1
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