Datasheet > XRT72L58

XRT72L58

更新时间： 2025-07-19 03:52:59

品牌	Logo	应用领域
艾科嘉 - EXAR		控制器
页数	文件大小	规格书
486页	5672K
描述
EIGHT CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER

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XRT72L58 数据手册

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PRELIMINARY

XRT72L58

EIGHT CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER

JANUARY 2001

REV. P1.1.2

the local terminal equipment to receive data from re-

mote terminal equipment.

GENERAL DESCRIPTION

The XRT72L58 Octal DS3/E3 Framer is designed to

accept “User Data” from the Terminal Equipment and

insert this data into the “payload” bit-fields within an

“outbound” DS3/E3 Data Stream. Further, the Framer

is also designed to receive an “inbound” DS3/E3 Data

Stream (from the Remote Terminal Equipment) and

extract out the “User Data”.

The Microprocessor Interface is used to configure the

Framer in different operating modes and monitor the

performance of the Framer.

The Performance Monitor Sections consist of a large

number of "Reset-upon-Read" and "Read-Only" reg-

isters that contain cumulative and "one-second" sta-

tistics that reflect the performance/health of the Eight

channels of the Framer/system.

The XRT72L58 DS3/E3 Framer is designed to sup-

port full-duplex data flow between Terminal Equip-

ment and an LIU (Line Interface Unit) IC. The Framer

will transmit, receive and process data in the DS3-C-

bit Parity, DS3-M13, E3-ITU-T G.751 and E3-ITU-T

G.832 Framing Formats.

FEATURES

• Transmits, Receives and Processes data in the

DS3-C-bit Parity, DS3-M13, E3-ITU-T G.751 and

E3-ITU-T G.832 Framing Formats.

The XRT72L58 DS3/E3 Framer consists of Eight

Transmit sections, Eight Receiver sections, Eight Per-

formance Monitor Sections and a Microprocessor in-

terface.

• 8 Channel HDLC Controller - Tx and Rx

• Interfaces to all Popular Microprocessors

• Integrated Framer Performance Monitor

• Available in a 388 Ball PBGA package

• 3.3V Power Supply with 5V Tolerant I/O

• Operating Temperature -40°C to +85°C

The Transmit Sections, include a Transmit Payload

Data Input Interface, a Transmit Overhead data Input

Interface Section, a Transmit HDLC Controller, a

Transmit DS3/E3 Framer block and a Transmit LIU In-

terface Block which permits the Terminal Equipment

to transmit data to a remote terminal.

APPLICATIONS

• Network Interface Units

• CSU/DSU Equipment.

• PCM Test Equipment

• Fiber Optic Terminals

• DS3/E3 Frame Relay Equipment

The Receive Sections, consist of a Receive LIU Inter-

face, a Receive DS3/E3 Framer, a Receive HDLC

Controller, a Receive Payload Data Output Interface,

and a Receive Overhead Data Interface which allows

FIGURE 1. BLOCK DIAGRAM OF THE XRT72L58

Reset

TestMode

NibbleLnTF

Typical Channel n

Where n = 0, 1, 2, 3, 4, 5, 6 & 7

TxOHInd[n:0]

TxNibFrame[n:0]

TxFrame[n:0]

TxNibClk[n:0]

TxLnClk[n:0]

TxFrameRef[n:0]

TxNib[n:0]

TxOHEnable

TxOHClk

TxOHFrame

TxAISEn

TxOH

T3/E3

Transmit

Overhead

Interface

T3/E3

transmit

Input

HDLC

controller

T3/E3 Transmit

Framer

TxOHIns

TxSer[n:0]

TxLineClk[n:0]

TxPOS[n:0]

TxNEG[n:0]

A(11:0)

D(7:0)

ALE_AS

WR_R/W

RDY_DTCK

Reset

INT

LIU

Interface/

Controller

T3 FEAC & Data

Link Controller

Performance

Monitor

Interrupt

Controller

Interface

RxLineClk[n:0]

RxPOS[n:0]

RxNEG[n:0]

ExtLOS

MOTO

RD_DS

RxClk[n:0]

RxOHEnable[n:0]

RxOHClk[n:0]

RxOH[n:0]

RxRed[n:0]

RxOHFrame[n:0]

RxOOF[n:0]

RxOHind[n:0]

RxFrame[n:0]

RxNib[n:0]

RxSer[n:0]

RxOUTClk[n:0]

T3/E3 Receive

Framer

T3/E3

Receive

Output

T3/E3

Receive

Overhead

Interface

HDLC

controller

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com

12 3 4 5 6 7...486

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与XRT72L58相关器件

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XRT7300	EXAR	获取价格	E3/DS3/STS-1 LINE INTERFACE UNIT
XRT7300	PULSE	获取价格	T3/DS3/E3/STS-1 TRANSFORMERS
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