IS41C16257C Datasheet, PDF (1/20 Pages) Integrated Silicon Solution, Inc – 4Mb DRAM WITH FAST PAGE MODE

IS41C16257C
IS41LV16257C
256Kx16
4Mb DRAM WITH FAST PAGE MODE
ADVANCED INFORMATION
APRIL 2010
FEATURES
• Fast access and cycle time
• TTL compatible inputs and outputs
• Refresh Interval: 512 cycles/8 ms
• Refresh Mode: RAS-Only, CAS-before-RAS
(CBR), and Hidden
• JEDEC standard pinout
• Single power supply:
5V ± 10% (IS41C16257C)
3.3V ± 10% (IS41LV16257C)
• Byte Write and Byte Read operation via
two CAS
• Lead-free available
• Industrial temperature available
DESCRIPTION
The ISSI IS41C16257C/IS41LV16257C is 262,144 x 16-
bit high-performance CMOS Dynamic Random Access
Memories. Fast Page Mode allows 512 random accesses
within a single row with access cycle time as short as 12
ns per 16-bit word. The Byte Write control, of upper and
lower byte, makes these devices ideal for use in 16- and
32-bit wide data bus systems.
These features make the IS41C16257C /IS41LV16257C
ideally suited for high band-width graphics, digital signal
processing, high-performance computing systems, and
peripheral applications.
The IS41C16257C/IS41LV16257C are packaged in a 40-
pin, 400-mil SOJ and TSOP (Type II).
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)
-35 -60 Unit
35 60 ns
11 15 ns
18 30 ns
14 25 ns
60 110 ns
Copyright © 2010 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 lat-
est version of this device specification before relying on any published information and before placing orders for products.
Integrated Silicon Solution, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be ex-
pected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless Integrated Silicon
Solution, Inc. receives written assurance to its satisfaction, that:
a.) the risk of injury or damage has been minimized;
b.) the user assume all such risks; and
c.) potential liability of Integrated Silicon Solution, Inc is adequately protected under the circumstances
Integrated Silicon Solution, Inc.
1
Rev.  00A
04/09/2010