IS41LV85125B Datasheet, PDF (1/18 Pages) Integrated Silicon Solution, Inc – 512K x 8 (4-MBIT) DYNAMIC RAM WITH FAST PAGE MODE

IS41LV85125B
512K x 8 (4-MBIT) DYNAMIC RAM
WITH FAST PAGE MODE
ISSI^®
APRIL 2005
FEATURES
• Fast access and cycle time
• TTL compatible inputs and outputs
• Refresh Interval: 1024 cycles/16 ms
• Refresh Mode: RAS-Only, CAS-before-RAS
(CBR), and Hidden
• JEDEC standard pinout
• Single power supply: 3.3V ± 10%
• Lead-free available
DESCRIPTION
The ISSI IS41LV85125B is 512,288 x 8-bit high-performance
CMOS Dynamic Random Access Memories. Fast Page
Mode allows 1024 random accesses within a single row
with access cycle time as short as 12 ns per 8-bit word.
These features make the IS41LV85125B ideally suited for
high band-width graphics, digital signal processing, high-
performance computing systems, and peripheral
applications.
The IS41LV85125B is available in a 28-pin, 400-mil SOJ
package.
KEY TIMING PARAMETERS
Parameter
Max. RAS Access Time (tRAC)
Max. CAS Access Time (tCAC)
Max. Column Address Access Time (tAA)
Min. Fast Page Mode Cycle Time (tPC)
Min. Read/Write Cycle Time (tRC)
-60 Unit
60 ns
15 ns
30 ns
40 ns
110 ns
PIN DESCRIPTIONS
A0-A9
I/O0-I/O7
WE
OE
RAS
CAS
VDD
GND
NC
Address Inputs
Data Inputs/Outputs
Write Enable
Output Enable
Row Address Strobe
Column Address Strobe
Power
Ground
No Connection
PIN CONFIGURATION
28-Pin SOJ
VDD 1
I/O0 2
I/O1 3
I/O2 4
I/O3 5
NC 6
WE 7
RAS 8
A9 9
A0 10
A1 11
A2 12
A3 13
VDD 14
28 GND
27 I/O7
26 I/O6
25 I/O5
24 I/O4
23 CAS
22 OE
21 NC
20 A8
19 A7
18 A6
17 A5
16 A4
15 GND
Copyright © 2005 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at any time
without notice. ISSI assumes no liability arising out of the application or use of any information, products or services described herein. Customers are advised to
obtain the latest version of this device specification before relying on any published information and before placing orders for products.
Integrated Silicon Solution, Inc. — 1-800-379-4774
1
Rev. B
04/19/05