CS61884 Datasheet, PDF (1/72 Pages) Cirrus Logic – Octal T1/E1/J1 Line Interface Unit

CS61884
Octal T1/E1/J1 Line Interface Unit
Features
Description
Industry Standard Footprint
Octal E1/T1/J1 Short-haul Line Interface Unit
Low Power
No External Component Changes for
100 Ω/120 Ω/75 Ω Operation
Pulse Shapes can be customized by the user
Internal AMI, B8ZS, or HDB3 Encoding/Decoding
LOS Detection per T1.231, ITU G.775, ETSI 300-233
G.772 Non-Intrusive Monitoring
G.703 BITS Clock Recovery
Crystal-less Jitter Attenuation
Serial/Parallel Microprocessor Control Interfaces
Transmitter Short Circuit Current Limiter (<50mA)
TX Drivers with Fast High-Z and Power Down
JTAG Boundary Scan compliant to IEEE 1149.1
144-Pin LQFP or 160-Pin BGA Package
ORDERING INFORMATION
CS61884-IQ
CS61884-IB
144-pin LQFP
160-pin FBGA
The CS61884 is a full-featured Octal E1/T1/J1 short-
haul LIU that supports both 1.544 Mbps or 2.048 Mbps
data transmission. Each channel provides crystal-less
jitter attenuation that complies with the most stringent
standards. Each channel also provides internal
AMI/B8ZS/HDB3 encoding/decoding. To support en-
hanced system diagnostics, channel zero can be
configured for G.772 non-intrusive monitoring of any of
the other 7 channels’ receive or transmit paths.
The CS61884 makes use of ultra low power matched im-
pedance transmitters and receivers to reduce power
beyond that achieved by traditional driver designs. By
achieving a more precise line match, this technique also
provides superior return loss characteristics. Additional-
ly, the internal line matching circuitry reduces the
external component count. All transmitters have controls
for independent power down and High-Z.
Each receiver provides reliable data recovery with over
12 dB of cable attenuation. The receiver also incorpo-
rates LOS detection compliant to the most recent
specifications.
Note: Click on any text in blue to go to cross-references.
LOS
RCLK
RPOS
RNEG
TCLK
TPOS
TNEG
JTAG
Serial
Port
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JTAG Interface
Host Interface
RTIP
RRING
TTIP
TRING
Host
Serial/Parallel
Port
Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
P.O. Box 17847, Austin, Texas 78760
[phone] FAX: [phone]
http://www.cirrus.com
© Copyright Cirrus Logic, Inc. 2002
(All Rights Reserved)
MAY ‘02
DS485PP4
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