IS42S86400B
IS42S16320B, IS45S16320B
64M x 8, 32M x 16
512Mb SYNCHRONOUS DRAM
FEATURES
• Clock frequency: 166, 143, 133 MHz
• Fully synchronous; all signals referenced to a
positive clock edge
• Internal bank for hiding row access/precharge
• Power supply
V
dd
V
ddq
IS42/45S16320B 3.3V 3.3V
IS42S86400B
• LVTTL interface
• Programmable burst length
– (1, 2, 4, 8, full page)
• Programmable burst sequence:
Sequential/Interleave
• Auto Refresh (CBR)
• Self Refresh
• 8K refresh cycles every 64 ms
• 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
• Available in 54-pin TSOP-II and 54-ball W-BGA
(x16 only)
• Operating Temperature Range:
Commercial: 0
o
C to +70
o
C
Industrial: -40
o
C to +85
o
C
Automotive, A1: -40
o
C to +85
o
C
3.3V 3.3V
SEPTEMBER 2009
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 as follows.
IS42S86400B
16Mx8x4 Banks
54-pin TSOPII
IS42/45S16320B
8M x16x4 Banks
54-pin TSOPII
54-ball W-BGA
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
-7
7
10
143
100
5.4
6
-75E
–
7.5
–
133
–
5.5
Unit
ns
ns
Mhz
Mhz
ns
ns
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
Rev. C
08/27/09
1
ISSI [ INTEGRATED SILICON SOLUTION, INC ]
