IS42S32800D Datasheet, PDF (1/60 Pages) Integrated Silicon Solution, Inc – 8M x 32 256Mb SYNCHRONOUS DRAM

IS42S32800D
IS45S32800D
8M x 32
256Mb SYNCHRONOUS DRAM
APRIL 2009
FEATURES
• Clock frequency: 166, 143 MHz
• Fully synchronous; all signals referenced to a
positive clock edge
• Internal bank for hiding row access/precharge
• Single Power supply: 3.3V + 0.3V
• LVTTL interface
• Programmable burst length
– (1, 2, 4, 8, full page)
• Programmable burst sequence:
Sequential/Interleave
• Auto Refresh (CBR)
• Self Refresh
• 4096 refresh cycles every 16ms (A2 grade) or
64 ms (Commercial, Industrial, A1 grade)
• Random column address every clock cycle
• Programmable CAS latency (2, 3 clocks)
• Burst read/write and burst read/single write
operations capability
• Burst termination by burst stop and precharge
command
OPTIONS
• Package:
86-pin TSOP-II
90-ball TF-BGA
• Operating Temperature Range:
Commercial (0^oC to +70^oC)
Industrial (-40^oC to +85^oC)
Automotive Grade, A1 (-40^oC to +85^oC)
Automotive Grade, A2 (-40^oC to +105^oC)
• Die Revision: D
OVERVIEW
ISSI's 256Mb Synchronous DRAMachieves high-speed
data transfer using pipeline architecture. All inputs and
outputs signals refer to the rising edge of the clock input.
The 256Mb SDRAM is organized in 2Meg x 32 bit x 4
Banks.
KEY TIMING PARAMETERS
Parameter
Clk Cycle Time
CAS Latency = 3
CAS Latency = 2
Clk Frequency
CAS Latency = 3
CAS Latency = 2
Access Timefrom Clock
CAS Latency = 3
CAS Latency = 2
-6
-7
6
7
10
10
166 143
100 100
5.4
5.4
6.5
6.5
-75E Unit
— ns
7.5 ns
— Mhz
133 Mhz
— ns
5.5 ns
ADDRESS TABLE
Parameter
8M x 32
Configuration
2M x 32 x 4 banks
Refresh Count Com./Ind. 4K / 64ms
A1
4K / 64ms
A2
4K / 16ms
Row Addresses
A0 – A11
Column
Addresses
A0 – A8
Bank Address
Pins
BA0, BA1
Autoprecharge
Pins
A10/AP
Copyright © 2006 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at any time with-
out 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. - www.issi.com
1
Rev.  B
03/27/09