L7C108
L7C109
128K x 8 Static RAM
L7C108-109 Block Diagram
ROW SELECT
ROW
ADDRESS
9
128 K x 8
MEMORY ARRAY
CE1
WE
OE
CE2
(L7C109 only)
CONTROL
COLUMN SELECT
& COLUMN SENSE
8
I/O
7 - 0
8
COLUMN ADDRESS
T
RUTH
T
ABLE
Mode
Standby
Standby
Standby
Standby
Read
Read
Write
*
Note:
for L7C109 only
OE
X
X
X
X
L
H
X
CE1
V
IH
X
V
CC
- 0.2 V
X
L
L
L
CE2*
X
V
IL
X
G
ND
+ 0.2 V
H
H
H
WE
X
X
X
X
H
H
L
DQ
High - Z
High - Z
High - Z
High - Z
POWER
I
I
I
I
Active
High - Z
D
Active
Active
LOGIC Devices Incorporated
www.logicdevices.com
2
1M Static RAMs
Feb 17, 2012 LDS-L7C108/9-G