IS41C4405
X
IS41LV4405
X
S
ERIES
4M x 4 (16-MBIT) DYNAMIC RAM
WITH FAST PAGE MODE
FEATURES
• Fast Page Mode Access Cycle
• TTL compatible inputs and outputs
• Refresh Interval:
-- 2,048 cycles/32 ms
-- 4,096 cycles/64 ms
• Refresh Mode:
RAS-Only,
CAS-before-RAS
(CBR), and Hidden
• Single power supply:
5V±10% or 3.3V ± 10%
• Byte Write and Byte Read operation via two
CAS
• Industrial temperature range -40°C to 85°C
ISSI
JUNE 2001
DESCRIPTION
®
The
ISSI
4405x Series is a 4,194,304 x 4-bit high-performance
CMOS Dynamic Random Access Memory. The Fast
Page Mode allows 2,048 or 4096 random accesses within
a single row with access cycle time as short as 20 ns per
4-bit word.
These features make the 4405x Series ideally suited for
high-bandwidth graphics, digital signal processing,
high-performance computing systems, and peripheral
applications.
The 4405x Series is packaged in a 24-pin 300-mil SOJ
with JEDEC standard pinouts.
PRODUCT SERIES OVERVIEW
Part No.
IS41C44052
IS41C44054
IS41LV44052
IS41LV44054
Refresh
2K
4K
2K
4K
Voltage
5V ± 10%
5V ± 10%
3.3V ± 10%
3.3V ± 10%
KEY TIMING PARAMETERS
Parameter
RAS
Access Time (t
RAC
)
CAS
Access Time (t
CAC
)
Column Address Access Time (t
AA
)
Fast Page Mode Cycle Time (t
PC
)
Read/Write Cycle Time (t
RC
)
-50
50
13
25
20
84
-60
60
15
30
25
104
Unit
ns
ns
ns
ns
ns
PIN CONFIGURATION
24 (26) Pin SOJ
PIN DESCRIPTIONS
A0-A11
VCC
I/O0
I/O1
WE
RAS
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
GND
I/O3
I/O2
CAS
OE
A9
A8
A7
A6
A5
A4
GND
Address Inputs (4K Refresh)
Address Inputs (2K Refresh)
Data Inputs/Outputs
Write Enable
Output Enable
Row Address Strobe
Column Address Strobe
Power
Ground
No Connection
A0-A10
I/O0-3
WE
OE
RAS
CAS
Vcc
GND
NC
*A11(NC)
A10
A0
A1
A2
A3
VCC
* A11 is NC for 2K Refresh devices.
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 2001, Integrated Silicon Solution, Inc.
Integrated Silicon Solution, Inc. — 1-800-379-4774
Rev. C
06/24/01
1
ISSI [ INTEGRATED SILICON SOLUTION, INC ]
