MCM6708A Datasheet, PDF (1/8 Pages) Motorola, Inc – 64K x 4 Bit Static RAM

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
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by MCM6708A/D
64K x 4 Bit Static RAM
The MCM6708A is a 262,144 bit static random access memory organized as
65,536 words of 4 bits, fabricated using high–performance silicon–gate BiCMOS
technology. Static design eliminates the need for external clocks or timing
strobes.
The MCM6708A is available in a 300 mil, 24 lead plastic surface–mount SOJ
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:
MCM6708A–8 = 8 ns
MCM6708A–10 = 10 ns
MCM6708A–12 = 12 ns
BLOCK DIAGRAM
A
A
A
A
A
ROW
DECODER
MEMORY MATRIX
256 ROWS x 256 x 4
COLUMNS
A
A
A
DQ0
•••
•••
INPUT
DATA
CONTROL
COLUMN I/O
•••
COLUMN DECODER
DQ3
AA A A AAAA
E
W
MCM6708A
J PACKAGE
300 MIL SOJ
CASE 810A–02
PIN ASSIGNMENT
A0 1
A1 2
A2 3
A3 4
A4 5
A5 6
A6 7
A7 8
A8 9
A9 10
E 11
VSS 12
24 ^VCC
23 ^A15
22 ^A14
21 ^A13
20 ^A12
19 ^A11
18 ^A10
17 ^DQ0
16 ^DQ1
15 ^DQ2
14 DQ3
13 W
PIN NAMES
A0 – A15 . . . . . . . . . . . Address Inputs
W . . . . . . . . . . . . . . . . . . . Write Enable
E . . . . . . . . . . . . . . . . . . . . . Chip Enable
DQ0 – DQ3 . . . . . . . Data Input/Output
VCC . . . . . . . . . . . + 5 V Power Supply
VSS . . . . . . . . . . . . . . . . . . . . . . Ground
NC . . . . . . . . . . . . . . . . No Connection
REV 5
5/95
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MCM6708A
2–1