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Integrated Silicon Solution Electronic Components Datasheet

IS42S16400J Datasheet

SYNCHRONOUS DYNAMIC RAM

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IS42S16400J
IS45S16400J
1 Meg Bits x 16 Bits x 4 Banks (64-MBIT)
SYNCHRONOUS DYNAMIC RAM
JULY 2014
FEATURES
Clock frequency: 200, 166, 143, 133 MHz
• Fully synchronous; all signals referenced to a
positive clock edge
• Internal bank for hiding row access/precharge
• Single 3.3V power supply
• LVTTL interface
• Programmable burst length
– (1, 2, 4, 8, full page)
• Programmable burst sequence:
Sequential/Interleave
• Self refresh modes
• Auto refresh (CBR)
• 4096 refresh cycles every 64 ms (Com, Ind, A1
grade) or 16ms (A2 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:
54-pin TSOP II
54-ball TF-BGA (8mm x 8mm)
60-ball TF-BGA (10.1mm x 6.4mm)
• Operating Temperature Range
Commercial (0oC to +70oC)
Industrial (-40oC to +85oC)
Automotive Grade A1 (-40oC to +85oC)
Automotive Grade A2 (-40oC to +105oC)
OVERVIEW
ISSI's 64Mb Synchronous DRAM is organized as 1,048,576
bits x 16-bit x 4-bank for improved performance. The
synchronous DRAMs achieve high-speed data transfer
using pipeline architecture. All inputs and outputs signals
refer to the rising edge of the clock input.
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
-5
5
7.5
200
133
4.8
5.4
-6 -7 Unit
6 7 ns
7.5 7.5 ns
166 143 Mhz
133 133 Mhz
5.4 5.4 ns
5.4 5.4 ns
ADDRESS TABLE
Parameter
4M x 16
Configuration
1M x 16 x 4
banks
Refresh Count
Com./Ind.
A1
A2
4K/64ms
4K/64ms
4K/16ms
Row Addresses
A0-A11
Column Addresses
A0-A7
Bank Address Pins
BA0, BA1
Auto Precharge Pins
A10/AP
Copyright © 2014 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. 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. — www.issi.com 1
Rev. G
7/30/2014


Integrated Silicon Solution Electronic Components Datasheet

IS42S16400J Datasheet

SYNCHRONOUS DYNAMIC RAM

No Preview Available !

IS42S16400J
IS45S16400J
GENERAL DESCRIPTION
The 64Mb SDRAM is a high speed CMOS, dynamic
random-access memory designed to operate in 3.3V
memory systems containing 67,108,864 bits. Internally
configured as a quad-bank DRAM with a synchronous
interface. Each 16,777,216-bit bank is organized as 4,096
rows by 256 columns by 16 bits.
The 64Mb SDRAM includes an AUTO REFRESH MODE,
and a power-saving, power-down mode. All signals are
registered on the positive edge of the clock signal, CLK.
All inputs and outputs are LVTTL compatible.
The 64Mb SDRAM has the ability to synchronously burst
data at a high data rate with automatic column-address
generation, the ability to interleave between internal banks
to hide precharge time and the capability to randomly
change column addresses on each clock cycle during
burst access.
A self-timed row precharge initiated at the end of the burst
sequence is available with the AUTO PRECHARGE function
enabled.  Precharge one bank while accessing one of the
other three banks will hide the precharge cycles and provide
seamless, high-speed, random-access operation.
SDRAM read and write accesses are burst oriented starting
at a selected location and continuing for a programmed
number of locations in a programmed sequence. The
registration of an ACTIVE command begins accesses,
followed by a READ or WRITE command. The ACTIVE
command in conjunction with address bits registered are
used to select the bank and row to be accessed (BA0,
BA1 select the bank; A0-A11 select the row). The READ
or WRITE commands in conjunction with address bits
registered are used to select the starting column location
for the burst access.
Programmable READ or WRITE burst lengths consist of
1, 2, 4 and 8 locations, or full page, with a burst terminate
option.
FUNCTIONAL BLOCK DIAGRAM
CLK
CKE
CS
RAS
CAS
WE
A10
A11
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
BA0
BA1
COMMAND
DECODER
&
CLOCK
GENERATOR
MODE
REGISTER
12
ROW
ADDRESS
12 LATCH
COLUMN
ADDRESS LATCH
8
BURST COUNTER
COLUMN
ADDRESS BUFFER
2
REFRESH
CONTROLLER
SELF
REFRESH
CONTROLLER
REFRESH
COUNTER
ROW
ADDRESS
BUFFER
12
DATA IN
BUFFER
16 16
DQM
DQ 0-15
DATA OUT
BUFFER
16 16
VDD/VDDQ
GND/GNDQ
4096
4096
4096
MEMORY CELL
12
4096
ARRAY
BANK 0
SENSE AMP I/O GATE
BANK CONTROL LOGIC
256K
(x 16)
COLUMN DECODER
8
Integrated Silicon Solution, Inc. — www.issi.com
Rev. G
7/30/2014


Part Number IS42S16400J
Description SYNCHRONOUS DYNAMIC RAM
Maker ISSI
Total Page 30 Pages
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