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VG37648041AT Datasheet(PDF) 4 Page - Vanguard International Semiconductor

Part # VG37648041AT
Description  256M:x4, x8, x16 CMOS Synchronous Dynamic RAM
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Manufacturer  VML [Vanguard International Semiconductor]
Direct Link  http://www.vis.com.tw
Logo VML - Vanguard International Semiconductor

VG37648041AT Datasheet(HTML) 4 Page - Vanguard International Semiconductor

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Document : 1G5-0157
Rev.1
Page 4
VIS
Preliminary
VG37648041AT
256M:x4, x8, x16
CMOS Synchronous Dynamic RAM
FUNCTIONAL BLOCK DIAGRAM- X4 CONFIGURATION
CKE
CLK#
Generator
CLK
CS#
WE#
CAS#
RAS#
LOGIC
MODE REGISTERS
REFRESH
COUNTER
13
ROW-
ADDRESS
MUX
BANK0
ROW-
ADDRESS
LATCH
&
DECODER
8192
BANK0
MEMORY
ARRAY
(8192x1024x8)
SENSE AMPLIFIERS
BANK0
MEMORY
ARRAY
(8192x1024x8)
SENSE AMPLIFIERS
BANK1
BANK2
BANK3
13
I/O GATING
DM MASK LOGIC
COLUMN
DECODER
BANK0
COLUMN
ADDRESS
CONTROL
LOGIC
COUNTER/
LATCH
10
COL0
ADDRESS
RESGISTER
15
A0-A12
BA0-BA1
2
11
13
13
2
READ
LATCH
MUX
8
WRITE
FIFO
&
DRIVERS
8
8
4
4
ctk
out
in
ctk
CLK
DQS
GENERATOR
DRVRS
DLL
CLK
1
DOS
COL0
4
2
8
MASK
DATA
1
1
4
4
1
1
4
4
1
4
RCVRS
COL0
DO0
DQ3,DM
DQS
1
1
Note 1: This Functional Block Diagram is intended to facilitate user understanding of the operation of the
device; it does not necessarily represent an actual circuit implementation.
Note 2: DM is a unidirectional signal (input only) but is internally loaded to match the load of the bidirectional
DQ and DQS signals.
(x8)
INPUT
REGISTERS
DATA


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