IS41LV16257 ISSI [Integrated Silicon Solution, Inc], IS41LV16257 Datasheet - Page 2

• Manufacturer Part Number: IS41LV16257
• Description: 256K x 16 (4-MBIT) DYNAMIC RAM WITH FAST PAGE MODE
• Manufacturer: ISSI [Integrated Silicon Solution, Inc]

FUNCTIONAL BLOCK DIAGRAM
IS41C16257
IS41LV16257
PIN CONFIGURATIONS
40-Pin TSOP (Type II)
2
VCC
VCC
VCC
RAS
I/O0
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
WE
NC
NC
NC
A0
A1
A2
A3
LCAS
UCAS
A0-A8
RAS
OE
WE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
GENERATOR
GENERATOR
COUNTER
ADDRESS
REFRESH
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
BUFFERS
CLOCK
CLOCK
CAS
RAS
GND
I/O15
I/O14
I/O13
I/O12
GND
I/O11
I/O10
I/O9
I/O8
NC
LCAS
UCAS
OE
A8
A7
A6
A5
A4
GND
40-Pin SOJ
CAS
VCC
VCC
VCC
RAS
I/O0
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
WE
NC
NC
NC
A0
A1
A2
A3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
CONTROL
LOGICS
WE
COLUMN DECODERS
SENSE AMPLIFIERS
MEMORY ARRAY
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
DATA I/O BUS
262,144 x 16
GND
I/O15
I/O14
I/O13
I/O12
GND
I/O11
I/O10
I/O9
I/O8
NC
LCAS
UCAS
OE
A8
A7
A6
A5
A4
GND
Integrated Silicon Solution, Inc. — 1-800-379-4774
WE
PIN DESCRIPTIONS
A0-A8
I/O0-I/O15
WE
OE
RAS
UCAS
LCAS
Vcc
GND
NC
CONTROL
LOGIC
OE
Address Inputs
Data Inputs/Outputs
Write Enable
Output Enable
Row Address Strobe
Upper Column Address
Strobe
Lower Column Address
Strobe
Power
Ground
No Connection
I/O0-I/O15
ISSI
DR004-1B
05/24/99
®