IS42S32400D-6BL ISSI, Integrated Silicon Solution Inc, IS42S32400D-6BL Datasheet - Page 2
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IS42S32400D-6BL
Manufacturer Part Number
IS42S32400D-6BL
Description
IC SDRAM 128MBIT 166MHZ 90FBGA
Manufacturer
ISSI, Integrated Silicon Solution Inc
Datasheet
1.IS42S32400D-7TL.pdf
(60 pages)
Specifications of IS42S32400D-6BL
Format - Memory
RAM
Memory Type
SDRAM
Memory Size
128M (4Mx32)
Speed
166MHz
Interface
Parallel
Voltage - Supply
3 V ~ 3.6 V
Operating Temperature
0°C ~ 70°C
Package / Case
90-FBGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
IS42S32400D-6BL
Manufacturer:
DALLAS
Quantity:
49
Part Number:
IS42S32400D-6BL
Manufacturer:
ICSI
Quantity:
20 000
IS42S32400D
DEVICE OVERVIEW
The 128Mb SDRAM is a high speed CMOS, dynamic
random-access memory designed to operate in 3.3V V
and 3.3V V
bits. Internally configured as a quad-bank DRAM with a
synchronous interface. Each 33,554,432-bit bank is orga-
nized as 4,096 rows by 256 columns by 32 bits.
The 128Mb 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 128Mb 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.
FUNCTIONAL BLOCK DIAGRAM (FOR 1MX32X4 BANKS)
2
CKE
RAS
CAS
A10
CLK
BA0
BA1
A11
WE
CS
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
DDQ
memory systems containing 134,217,728
GENERATOR
COMMAND
DECODER
12
CLOCK
&
ADDRESS
LATCH
ROW
8
ADDRESS BUFFER
BURST COUNTER
ADDRESS LATCH
REGISTER
MODE
COLUMN
COLUMN
12
12
CONTROLLER
REFRESH
COUNTER
REFRESH
CONTROLLER
REFRESH
ADDRESS
BUFFER
SELF
DD
ROW
A self-timed row precharge initiated at the end of the burst
sequence is available with the AUTO PRECHARGE func-
tion 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 num-
ber of locations in a programmed sequence. The registra-
tion 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.
BANK CONTROL LOGIC
Integrated Silicon Solution, Inc. — www.issi.com
12
4096
32
32
4096
4096
4096
DATA OUT
BUFFER
BUFFER
8
DATA IN
(x 32)
COLUMN DECODER
256
SENSE AMP I/O GATE
MEMORY CELL
BANK 0
32
32
ARRAY
4
DQM0 - DQM3
DQ 0-31
V
V
DD
ss
/V
/V
ss
DDQ
Q
03/03/09
Rev. F