Datasheet > AD6438-2

AD6438-2

更新时间： 2024-01-09 22:18:25

品牌	Logo	应用领域
亚德诺 - ADI		ATM 异步传输模式电信电信集成电路
页数	文件大小	规格书
28页	185K
描述
IC ATM NETWORK INTERFACE, PQFP144, LQFP-144, ATM/SONET/SDH IC

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技术参数
数据手册

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AD6438-2 技术参数

生命周期：	Obsolete	零件包装代码：	QFP
包装说明：	LFQFP,	针数：	144
Reach Compliance Code：	unknown	HTS代码：	8542.39.00.01
风险等级：	5.82	JESD-30 代码：	S-PQFP-G144
长度：	20 mm	功能数量：	1
端子数量：	144	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	LFQFP	封装形状：	SQUARE
封装形式：	FLATPACK, LOW PROFILE, FINE PITCH	认证状态：	Not Qualified
座面最大高度：	1.6 mm	标称供电电压：	3.3 V
表面贴装：	YES	电信集成电路类型：	ATM/SONET/SDH NETWORK INTERFACE
温度等级：	INDUSTRIAL	端子形式：	GULL WING
端子节距：	0.5 mm	端子位置：	QUAD
宽度：	20 mm	Base Number Matches：	1

AD6438-2 数据手册

ATM Interface and Framer IC

for ADSL Chipsets

AD6438-2

FEATURES

GENERAL DESCRIPTION

Component in Analog Devices’ AD20msp918 ADSL

Chipset

Suitable for CO (Central Office) or Residence (ATU-R

and ATU-C)

Designed to ANSI T1.413 Issue 2, ETSI TR238, ITU

G.992.1 and G.992.2 Standards

ATM Operation and Functionality as Defined by Issue 2

ATM Mode and ADSL Forum

Optional Serial Interface to Access the PMD Sublayer,

Available on the AD6438-2, Not Available on the AD6438

UTOPIA Level 1 and Level 2 Physical Interface

Byte-Parallel or “Multi-PHY” for Dual Latency

Implements Both Issue 1 and Issue 2 ADSL Framing

Structure (Reduced Overhead)

The AD6438-2 Interface and Framer IC is part of Analog Devices’

AD20msp918 chipset, a flexible standards-based solution for

creating high-performance, ATM-based, ADSL modems. The

AD6438-2 is interoperable with the AD20msp910 ADSL chipset.

The AD6438-2 interfaces an ADSL modem to an external sys-

tem, at either CO (Central Office) or RT (Remote Terminal)

modem, using a standard UTOPIA 1- or 2-port (byte-wide, Cell

or Byte Mode). It inserts ATM cells into an ADSL line, with

functions that correspond to the Transmission Convergence

(TC) sublayer in the BISDN protocol reference model (per

ITU-T I.432 and T1.413 Issue 2). These include cell delinea-

tion, HEC generation, and cell-rate adaption, as defined by the

ATM working group of the ADSL Forum and the RBB working

group of the ATM Forum.

144-Lead LQFP

The AD6438-2 implements both standard and reduced-overhead

framing per ANSI T1.413 Issue 2, and includes FEC (Forward

Error-Correcting) Code and interleaving.

–40؇C to +85؇C, 3.3 V Operation

FUNCTIONAL BLOCK DIAGRAM

35MHz SYSTEM

AD6438-2

TIMING

OFFSET

NTR

8kHz

NTR

FAST

ADSL

FRAMER

ATM

UTOPIA 1/2

INTERFACE

FEC

AD6439-2

INTLV

ISSUE

1, 2

ADDR

CONTROL

ADDRESS

CONTROL

ADTSP-2183

INTERLEAVE RAM

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.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

World Wide Web Site: http://www.analog.com

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