IS42S32160B
IS45S32160B
16M x 32
512Mb SYNCHRONOUS DRAM
DECEMBER 2009
FEATURES
• Clock frequency: 166, 143 MHz
• Fully synchronous; all signals referenced to a
positive clock edge
• Internal bank for hiding row access/precharge
OVERVIEW
ISSI's 512Mb Synchronous DRAM achieves high-speed
data transfer using pipeline architecture. All inputs and
outputs signals refer to the rising edge of the clock input.
The 512Mb SDRAM is organized in 4Meg x 32 bit x 4
Banks.
• 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
• 8192 refresh cycles every 16ms (A2 grade) or
64 ms (Commercial, Industrial, A1 grade)
• Random column address every clock cycle
KEY TIMING PARAMETERS
Parameter
Clk Cycle Time
CAS Latency = 3
CAS Latency = 2
Clk Frequency
CAS Latency = 3
CAS Latency = 2
Access Time from Clock
CAS Latency = 3
CAS Latency = 2
-6
6
10
166
100
5.4
6.5
-7
7
10
143
100
5.4
6.5
-75E Unit
—
ns
7.5
ns
—
Mhz
133 Mhz
—
ns
5.5
ns
• Programmable CAS latency (2, 3 clocks)
• Burst read/write and burst read/single write
operations capability
ADDRESS TABLE
• Burst termination by burst stop and precharge
command
Parameter
16M x 32
Configuration
4M x 32 x 4 banks
OPTIONS
Refresh Count
• Package:
86-pin TSOP-II
90-ball W-BGA
• Operating Temperature Range:
Commercial (0oC to +70oC)
Industrial (-40oC to +85oC)
Automotive Grade, A1 (-40oC to +85oC)
Automotive Grade, A2 (-40oC to +105oC)
Com./Ind.
8K / 64ms
A1
8K / 64ms
A2
8K / 16ms
Row Addresses
A0 – A12
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 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. - www.issi.com
Rev. A
11/30/09
1
