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參數資料
| 型號： | AD6435 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 通信及網絡 |
| 英文描述： | ADSL（Asymmetric digital Subscriber Line）Chipset(非對稱數字用戶鏈路芯片組) |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PQFP128 |
| 封裝： | PLASTIC, TQFP-128 |
| 文件頁數： | 1/12頁 |
| 文件大?。?/td> | 89K |
| 代理商： | AD6435 |
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
AD6435
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
Analog Devices, Inc., 1997
ADSL Chipset
FUNCT IONAL BLOCK DIAGRAM
BYPASS PORT
ELASTIC STORE,
FRAMING,
BYTE–STUFF/ROB
DIGITAL LOGIC,
FEC, CRC
INTERLEAVING
RECEIVE
CONTROL
TO ADTSP2183
DUPLEX_TX
DUPLEX_RX
SIMPLEX_TX
(ATU-C)
SIMPLEX_RX
(ATU-R)
INTERLEAVE RAM
TO AD6436/AD6439
FROM AD6436/AD6439
AD6435
TRANSMIT
FEATURES
Component in Analog Devices DMT ADSL Chipset—
AD20msp910
Designed to ANSI/ETSI T1.413
Suitable for CO or Residence (ATU-R and ATU-C)
Performs All Digital Interface Tasks:
Elastic Store; Byte-Stuffing/Robbing
Synchronization and EOC and AOC Insertion/Removal
CRC Generation/Detection
Scrambler and Descrambler
Forward Error Correction/Detection
Interleave/Deinterleave
Absolute Maximum Data Rate: 12 Mbps Simplex/
4 Mbps Duplex
Simple Interface: Synchronous Simplex and Duplex
Streams
128-Lead TQFP
Operating Temperature Range: –40
8
C to +85
8
C
3.3 V Operation, 400 mW
GE NE RAL DE SCRIPT ION
T he AD6435 is part of the Analog Devices ADSL chipset, the
AD20msp910. It accompanies the AD6436 (DMT accelerator),
AD6437 (single-chip analog front end) and ADT SP-2183 (con-
trol and DSP). Object code is also supplied. Offering a flex-
ible, standard-based approach (designed to ANSI T 1.413,
Category 1) with low total bill of materials and high perfor-
mance, the chipset offers a straightforward approach to realizing
an ADSL modem.
T he AD6435 interfaces the ADSL modem to the external sys-
tem, at either CO or RT modem. It implements all the bit-
stuffing/robbing and elastic store operations, and all digital
processing (block and forward error correction, scrambling,
interleaving, etc.). T he AD6435 has four simple synchronous
connections, duplex in and out, simplex in (only used at
AT U-C) and simplex out (used at AT U-R), which may be
treated as the AS0 Simplex and LS0 duplex stream of the stan-
dard. T hese have “clean” clock and data, and may operate
asynchronously of one another, or of the modem itself.
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