Datasheet > XRT72L71IQ160

XRT72L71IQ160

更新时间： 2025-07-21 15:58:31

品牌	Logo	应用领域
艾科嘉 - EXAR		ATM 异步传输模式电信电信集成电路
页数	文件大小	规格书
104页	539K
描述
ATM Network Interface, 1-Func, CMOS, PQFP160, 28 X 28 MM, PLASTIC, QFP-160

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XRT72L71IQ160 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Obsolete	零件包装代码：	QFP
包装说明：	QFP, QFP160,1.2SQ	针数：	160
Reach Compliance Code：	compliant	HTS代码：	8542.39.00.01
风险等级：	5.9	Is Samacsys：	N
应用程序：	ATM	JESD-30 代码：	S-PQFP-G160
JESD-609代码：	e0	长度：	28 mm
功能数量：	1	端子数量：	160
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：	QFP
封装等效代码：	QFP160,1.2SQ	封装形状：	SQUARE
封装形式：	FLATPACK	峰值回流温度（摄氏度）：	NOT SPECIFIED
电源：	3.3 V	认证状态：	Not Qualified
座面最大高度：	4.07 mm	子类别：	ATM/SONET/SDH ICs
标称供电电压：	3.3 V	表面贴装：	YES
技术：	CMOS	电信集成电路类型：	ATM/SONET/SDH NETWORK INTERFACE
温度等级：	INDUSTRIAL	端子面层：	Tin/Lead (Sn/Pb)
端子形式：	GULL WING	端子节距：	0.65 mm
端子位置：	QUAD	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	28 mm	Base Number Matches：	1

XRT72L71IQ160 数据手册

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PRELIMINARY

XRT72L71

DS3 ATM UNI/CLEAR CHANNEL FRAMER

REV. P1.0.5

• Additionally, the Transmit DS3 Framer can transmit

path maintenance data link messages to the

Remote Terminal Equipment via the on-chip LAPD

Transmitter.

messages via the “on-chip” Receive HDLC Control-

ler block.

• The Receive Overhead Output Interface block out-

puts all overhead bits, which have been received

via the “inbound” DS3 data stream. The purpose of

the “Receive Overhead Output Interface” block is to

permit external circuitry (within the local terminal

equipment) to have access to these overhead bits,

for additional processing.

• Generates interrupts upon “Completion of Trans-

mission of LAPD and FEAC” Messages.

Note: The Transmit DS3 Framer will support either M13 or

C-bit Parity Framing Formats.

CLEAR-CHANNEL-FRAMING MODE OF OPERA-

TION

• The Receive Payload Data Output Interface block

outputs all data bits which have been received via

the XRT72L71, to the local terminal equipment.

Since the “Receive Payload Data Output Interface”

block outputs both “payload” and “overhead” data

bits, to the local terminal equipment; the “Receive

Payload Data Output Interface” block also includes

an “Overhead Indicator” output pin. This output pin

pulses “High” whenever an overhead bit is being

output via the “Receive Payload Data Output Inter-

face” block.

When the XRT72L71has been configured to operate

in the “Clear-Channel Framer” mode, it can be func-

tionally subdivided into 6 different sections.

• Receive Section

• Transmit Section

• Microprocessor Interface Section

• Performance Monitor Section

• Test and Diagnostic Section

• Line Interface Unit Scan/Drive Section.

THE TRANSMIT SECTION

The purpose of the Transmit Section of the

XRT72L71 Clear-Channel DS3 Framer is to allow a

local terminal to transmit data to a remote terminal

equipment, via a DS3 transport medium.

The features of each of the “Receive” and “Transmit”

Section (for Clear-Channel Framer applications) are

listed below.

THE RECEIVE SECTION

The Transmit Section of the XRT72L71 Clear-Chan-

nel DS3 Framer consists of the following functional

blocks.

The purpose of the Receive Section of the XRT72L71

Clear-Channel DS3 Framer is to allow a given Termi-

nal to receive data from a remote terminal, which is

being transported over a DS3 data stream.

• Transmit Payload Data Input Interface block

• Transmit Overhead Data Input Interface block

• Transmit DS3 Framer block

The Receive Section of the XRT72L71 Clear-Channel

DS3 Framer IC consists of the following functional

blocks.

It should be noted that the “Transmit DS3 Framer”

block is also active, whenever the XRT72L71 has

been configured to operate in the “ATM UNI” Mode.

• Receive DS3 Framer block

• Receive Overhead Data Output Interface block

• Receive Payload Data Output Interface block

The Transmit Section of the Clear-Channel DS3

Framer will:

It should be noted that the “Receive DS3 Framer”

block is also active, when the XRT72L71 has been

configured to operate in the “ATM UNI” Mode.

• Accept all “user” data, (which is required to be

transported to the Remote Terminal Equipment via

a DS3 data stream) via the “Transmit Payload Data

Input Interface block.

Each of these functional blocks, within the Receive

Section of the Framer will do the following.

• Optionally accepts and insert overhead bits (into

the “outbound” DS3 data-stream) via the “Transmit

Overhead Input Interface block.

• The Receive DS3 Framer block will synchronize to

the incoming DS3 data stream. All “inbound” DS3

data will be routed to the “Receive Payload Data

Output Interface” block. All overhead bits (which

are extracted from each “inbound” DS3 frame) will

be routed to the “Receive Overhead Data Output

Interface” block.

• The Transmit DS3 Framer block will accept payload

data (from the Transmit Payload Data Input Inter-

face block) and overhead data (from the Transmit

Overhead Data Input Interface block) and will cre-

ate a DS3 data stream. If no overhead data is

inserted via the “Transmit Overhead Data Input

interface” block, then the “Transmit DS3 Framer”

block will insert its own values for the overhead bits.

• The Receive DS3 Framer block can also be used to

receive FEAC (Far-End-Alarm & Control) mes-

sages and PMDL (Path Maintenance Data Link)

1 2 3 456 7 8...104

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