®
IS41C16256
IS41LV16256
256K x 16 (4-MBIT) DYNAMIC RAM
WITH EDO PAGE MODE
ISSI
JUNE 2000
FEATURES
DESCRIPTION
• TTL compatible inputs and outputs
• Refresh Interval: 512 cycles/8 ms
TheISSI IS41C16256andIS41LV16256are262,144x16-bit
high-performanceCMOSDynamicRandomAccessMemory. Both
productsofferacceleratedcycleaccessEDOPageMode. EDO
PageModeallows512randomaccesseswithinasinglerowwith
accesscycletimeasshortas10nsper16-bitword.TheByteWrite
control, of upper and lower byte, makes the IS41C16256 and
IS41LV16256idealforusein16and32-bitwidedatabussystems.
• Refresh Mode : RAS-Only, CAS-before-RAS
(CBR), and Hidden
• JEDEC standard pinout
• Single power supply
5V ± 10% (IS41C16256)
ThesefeaturesmaketheIS41C16256andIS41LV1626 ideally
suited for high band-width graphics, digital signal processing,
high-performancecomputingsystems,andperipheralapplications.
3.3V ± 10% (IS41LV16256)
• Byte Write and Byte Read operation via two CAS
• Extended Temperature Range -30oC to 85oC
• Industrail Temperature Range -40oC to 85oC
The IS41C16256 and IS41LV16256 are packaged in 40-pin
400-mil SOJ and TSOP (Type II).
KEY TIMING PARAMETERS
Parameter
-35
-50
50
14
25
20
90
-60
60
Unit
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)
35
10
18
12
60
15
ns
30
ns
25
ns
110
ns
PIN CONFIGURATIONS
40-Pin TSOP (Type II)
40-Pin SOJ
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
I/O15
I/O14
I/O13
I/O12
GND
I/O11
I/O10
I/O9
I/O8
NC
2
PIN DESCRIPTIONS
3
4
A0-A8 Address Inputs
5
I/O0-15 Data Inputs/Outputs
6
7
WE
Write Enable
8
OE
Output Enable
9
I/O8
10
11
12
13
14
15
16
17
18
19
20
RAS
UCAS
LCAS
Vcc
Row Address Strobe
UpperColumnAddressStrobe
LowerColumnAddressStrobe
Power
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
A8
A8
A0
A7
A7
GND
NC
Ground
A1
A6
A1
A6
No Connection
A2
A5
A2
A5
A3
A4
A3
A4
VCC
GND
VCC
GND
ISSI reserves the right to make changes to its products at any time without notice in order to improve design and supply the best possible product. We assume no responsibility for any
errors which may appear in this publication. © Copyright 2000, Integrated Silicon Solution, Inc.
Integrated Silicon Solution, Inc. — 1-800-379-4774
Rev. J
1
06/29/00