IC41C16256
IC41LV16256
256K x 16 (4-MBIT) DYNAMIC RAM
WITH EDO PAGE MODE
FEATURES
Extended Data-Out (EDO) Page Mode access cycle
TTL compatible inputs and outputs; tristate I/O
Refresh Interval: 512 cycles /8 ms
Refresh Mode:
RAS-Only, CAS-before-RAS
(CBR),
Hidden
• Single power supply:
5V ± 10% (IC41C16256)
3.3V ± 10% (IC41LV16256)
• Byte Write and Byte Read operation via two
CAS
• Industrail Temperature Range -40
o
C to 85
o
C
•
Pb-free package is available
•
•
•
•
DESCRIPTION
The
ICSI
IC41C16256 and IC41LV16256 is a 262,144 x 16-
bit high-performance CMOS Dynamic Random Access Memo-
ries. The IC41C16256 offer an accelerated cycle access
called EDO Page Mode. EDO Page Mode allows 512 random
accesses within a single row with access cycle time as short
as 10 ns per 16-bit word. The Byte Write control, of upper and
lower byte, makes the IC41C16256 ideal for use in
16-, 32-bit wide data bus systems.
These features make the IC41C16256and IC41LV16256 ideally
suited for high-bandwidth graphics, digital signal processing,
high-performance computing systems, and peripheral
applications.
The IC41C16256 is packaged in a 40-pin 400mil SOJ and
400mil TSOP-2.
KEY TIMING PARAMETERS
Parameter
Max.
RAS
Access Time (t
RAC
)
Max.
CAS
Access Time (t
CAC
)
Max. Column Address Access Time (t
AA
)
Min. EDO Page Mode Cycle Time (t
PC
)
Min. Read/Write Cycle Time (t
RC
)
-25(5V)
25
8
12
10
45
-35
35
10
18
12
60
-50
50
14
25
20
90
-60
60
15
30
25
110
Unit
ns
ns
ns
ns
ns
PIN CONFIGURATIONS
40-Pin TSOP-2
VCC
I/O0
I/O1
I/O2
I/O3
VCC
I/O4
I/O5
I/O6
I/O7
1
2
3
4
5
6
7
8
9
10
40
39
38
37
36
35
34
33
32
31
GND
I/O15
I/O14
I/O13
I/O12
GND
I/O11
I/O10
I/O9
I/O8
40-Pin SOJ
VCC
I/O0
I/O1
I/O2
I/O3
VCC
I/O4
I/O5
I/O6
I/O7
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
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
PIN DESCRIPTIONS
A0-A8
I/O0-15
WE
OE
RAS
UCAS
LCAS
Vcc
GND
NC
Address Inputs
Data Inputs/Outputs
Write Enable
Output Enable
Row Address Strobe
Upper Column Address Strobe
Lower Column Address Strobe
Power
Ground
No Connection
NC
NC
WE
RAS
NC
A0
A1
A2
A3
VCC
11
12
13
14
15
16
17
18
19
20
30
29
28
27
26
25
24
23
22
21
NC
LCAS
UCAS
OE
A8
A7
A6
A5
A4
GND
NC
WE
RAS
NC
A0
A1
A2
A3
VCC
ICSI [ INTEGRATED CIRCUIT SOLUTION INC ]
