IC41C16256
IC41LV16256
256K x 16 (4-MBIT) DYNAMIC RAM
WITH EDO PAGE MODE
DESCRIPTION
FEATURES
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.
• 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)
These features make the IC41C16256and IC41LV16256 ideally
suited for high-bandwidth graphics, digital signal processing,
high-performance computing systems, and peripheral
applications.
• Byte Write and Byte Read operation via two CAS
• Industrail Temperature Range -40oC to 85oC
• Pb-free package is available
The IC41C16256 is packaged in a 40-pin 400mil SOJ and
400mil TSOP-2.
KEY TIMING PARAMETERS
Parameter
-25(5V)
-35
35
10
18
12
60
-50
50
14
25
20
90
-60
60
15
30
25
Unit
ns
ns
ns
ns
Max. RAS Access Time (tRAC)
Max. CAS Access Time (tCAC)
Max. Column Address Access Time (tAA)
Min. EDO Page Mode Cycle Time (tPC)
Min. Read/Write Cycle Time (tRC)
25
8
12
10
45
110
ns
PIN CONFIGURATIONS
40-Pin TSOP-2
40-Pin SOJ
PIN DESCRIPTIONS
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
VCC
I/O0
I/O1
I/O2
I/O3
VCC
I/O4
I/O5
I/O6
I/O7
NC
1
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
GND
A0-A8
Address Inputs
2
I/O15
I/O14
I/O13
I/O12
GND
I/O11
I/O10
I/O9
I/O8
NC
I/O0-15 Data Inputs/Outputs
3
4
WE
Write Enable
5
OE
Output Enable
6
7
RAS
UCAS
LCAS
Vcc
Row Address Strobe
Upper Column Address Strobe
Lower Column Address Strobe
Power
8
9
I/O8
10
11
12
13
14
15
16
17
18
19
20
NC
NC
WE
RAS
NC
A0
11
12
13
14
15
16
17
18
19
20
30
29
28
27
26
25
24
23
22
21
NC
NC
LCAS
UCAS
OE
LCAS
UCAS
OE
WE
RAS
NC
GND
NC
Ground
A8
No Connection
A8
A0
A7
A7
A1
A6
A1
A6
A2
A5
A2
A5
A3
A4
A3
A4
VCC
GND
VCC
GND
ISSI [ INTEGRATED SILICON SOLUTION, INC ]
