Datasheet > SK70725APE

SK70725APE

更新时间： 2024-09-28 21:17:47

品牌	Logo	应用领域
LevelOne		电信电信集成电路
页数	文件大小	规格书
76页	1149K
描述
Line Driver/Receiver, CMOS, PQCC44

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SK70725APE 数据手册

DATA SHEET

APRIL 2000

Revision2.0

SK70725A/SK70721

Enhanced Multi-Rate DSL Data Pump Chip Set

General Description

Features

The Enhanced Multi-Rate DSL Data Pump (EMDP) is a

variable-rate transceiver that provides symmetric full-

duplex communication on one twisted wire pair using a

2B1Q line code with echo-cancellation. The EMDP

operates in either framed or Transparent modes and

supports channelized, cell and packet applications.

Symmetrical line rates may be at any speed between 272

and 1,168 kbps. Performance is specified at 272, 400, 528

784 and 1,168 kbps for payloads of 4, 6, 8, 12 or 18

channels at 64 kbps and 16 kbps of overhead. The EMDP

chip set consists of two devices:

• Fully integrated, 2-chip transceiver. Compliant with

the following standards:

• ITU G.991.1

• ANSI Committee T1E1.4-TR28 (T1E1.4/96-006)

• ETSI ETR-152

• Integrated line drivers, filters and hybrid circuits

reduce the number of external components required

• Multiple framing modes: Transparent, T1 standard,

E1 standard

• Independent transmit and receive clocks for minimum

delay

• Tolerance for extended signal interruptions

• Single +5V supply

• SK70725A-EnhancedDigitalSignalProcessor(EDSP)

• SK70721- Integrated Analog Front-End (IAFE)

• Supports processor directed rate selection driven by

The IAFE is a fully integrated CMOS analog front-end

which includes D/A converter, filters, and transmit line

drivers. Receiver functions include analog echo canceller,

AGC, A/D converter modulator and VCXO functions. The

EDSP incorporates all digital signal processing required

for A/D conversion, echo-cancellation, data scrambling

and adaptive equalization as well as transceiver activation

state machine control.

receive signal level and noise margin

• Continuously adaptive echo canceller and equalizers

maintain excellent transmission performance with

changing noise and line characteristics

• Typical noise-free transmission range:

• 272 kbps

25.3 kft (7.7 km) on 24 AWG (0.5 mm) wire

17.1 kft (5.2 km) on 26 AWG (0.4 mm) wire

• 784 kbps

Applications

19.8 kft (6.0 km) on 24 AWG (0.5 mm) wire

• High speed symmetrical Internet access

• Extended range fractional T1/E1 transport

• Digital pairgain systems from 4 to 18 channels

• Wireless base station access

13.7 kft (4.2 km) on 26 AWG (0.4 mm) wire

• 1,168 kbps

17.1 kft (5.2 km) on 24 AWG (0.5 mm) wire

12.3 kft (3.7 km) on 26 AWG (0.4 mm) wire

• WAN access for 10BaseT and ATM LANs

• Video Conferencing Systems

SK70725A/SK70721

Block Diagram

IAFE

EDSP

TX_CLK

Line

MASTER_CLK

Driver

TTIP

Data

Fltr

DATA

AND

Select

Framer

2B1Q

TSGN

TMAG

Encoder

Scrambler

TRING

CLOCK

Activation

Control

Logic

Echo

Control

VREF

Canceller

MODE

DFE

CONTROL

FFE

DAGC

AGC

Tap

Deci

mator

Decision

Circuit

AD0

AD1

Back

End

RTIP

BRING

RRING

STATUS

INDICATORS

AGC

Logic

AGC_SET

VCO_CLK

BTIP

Phase

Detector

I/F

VPLL

VCO

Serial

I/F

To Various

Blocks

SRCTL_FS

SER_CTL

Refer to www.level1.com for most current information.

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与SK70725APE相关器件

型号	品牌	获取价格	描述	数据表
SK70725PE	LevelOne	获取价格	Digital SLIC, 1-Func, PQCC44, PLASTIC, LCC-44
SK70744HE	INTEL	获取价格	Framer, CMOS, PQFP100, MO-112, QFP-100
SK70B	SEMIKRON	获取价格	Bridge Rectifier
SK70B07TD1E1	SEMIKRON	获取价格	Bridge Rectifier Diode,
SK70B08	SEMIKRON	获取价格	Bridge Rectifier
SK70B12	SEMIKRON	获取价格	Bridge Rectifier
SK70B16	SEMIKRON	获取价格	Bridge Rectifier
SK70D	SEMIKRON	获取价格	Bridge Rectifier
SK70D08	SEMIKRON	获取价格	Bridge Rectifier
SK70D12	SEMIKRON	获取价格	Bridge Rectifier

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