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參數資料
| 型號： | CS61881 |
| 英文描述： | Octal E1 Analog Front EndLine Interface Units |
| 中文描述： | 八路素E1模擬前端底線接口單元 |
| 文件頁數： | 1/28頁 |
| 文件大小： | 461K |
| 代理商： | CS61881 |
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Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
1
Copyright
Cirrus Logic, Inc. 2000
(All Rights Reserved)
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.cirrus.com
CS61881
Octal E1 Analog Front End
Features
I
Octal E1 Line Interface Unit Compliant with G.703
I
Very Low Power <100mW per Channel
I
Single Supply 3.3 V Operation, 5 V Tolerant I/O
I
No External Component Changes for 120
/75
Operation
I
Analog LOS Detection per ITU G.775
I
Transmitter Short Circuit Current Limiter (<50mA)
I
TX Drivers with Fast Tristate and Power Down
I
Transmit Return Loss Exceeds ETS 300 166
I
JTAG Boundary Scan compliant to IEEE 1149.1
I
144 Pin LQFP or 160 BGA Package
ORDERING INFORMATION
CS61881-IQ
CS61881-IB
144-pin LQFP
160-pin BGA
Description
The CS61881contains eight analog front ends that each
provide the line interface for E1 transmission systems.
The device contains eight receivers and transmitters
supporting a 2.048 Mbps data rate compliant to ITU
G.703. This device is commonly used with external cir-
cuitry that supplies data encoding/decoding, clock
recovery, and jitter attenuation.
The CS61881 makes use of ultra low power matched im-
pedance transmitters to reduce power beyond that
achieved by traditional driver designs. By achieving a
more precise line match, this technique also provides su-
perior return loss characteristics, exceeding ETS 300
166. The internal line matching circuitry reduces the ex-
ternal component count and eliminates the need to
change components to support both 75
and 120
lines. All transmitters have controls for independent pow-
er down and tristate.
The receiver has a high noise margin, providing reliable
data recovery even with cable attenuation of over 12 dB.
It has an impedance matched front end, eliminating the
need to change components to support both 75
and
120
line impedances. The receiver also incorporates
LOS
detection
compliant
specifications.
to
the
most
recent
A five wire JTAG interface is also provided for improved
diagnostics and reduced manufacturing cost.
Driver
Peak
Detect
RPOS
RNEG
TPOS
TNEG
TCLK
LOS
Slicer
G.775
LOS
Pulse
Shaper
1
2
8
RTIP
RRING
TTIP
TRING
L
L
XOR
RCLK
R
L
JTAG
Serial
Port
JTAG Interface
APR ‘00
DS451PP3
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相關代理商/技術參數 |
參數描述 |
|---|---|
| CS61881-IB | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CS61881-IQ | 制造商:Rochester Electronics LLC 功能描述:144TQFP - Bulk |
| CS61884 | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:Octal T1/E1/J1 Line Interface Unit |
| CS61884_05 | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:Octal T1/E1/J1 Line Interface Unit |
| CS61884-IB | 功能描述:網絡控制器與處理器 IC IC Octal T1/E1/J1 Line Interface Unit RoHS:否 制造商:Micrel 產品:Controller Area Network (CAN) 收發器數量: 數據速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
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