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CS61581-IL Datasheet(PDF) 1 Page - Cirrus Logic

Part No. CS61581-IL
Description  T1/E1 Universal Line Interface
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Maker  CIRRUS [Cirrus Logic]
Homepage  http://www.cirrus.com
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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
CS61581
T1/E1 Universal Line Interface
Features
l Provides T1 and E1, Long Haul and Short
Haul Line Interface
l Provides a QRSS Test Signal and Error
Detector
l Impedance Matching Line Driver Using a
Single Transformer
l Greater than 14 dB of Transmit Return Loss
Without Using External Resistors
l No Crystal Needed for Jitter Attenuation
l Meets AT&T 62411 and TBR 12/13 Jitter
Tolerance and Attenuation Requirements
l Meets ANSI T1.231B and ITU-T G.775
Requirements for LOS and AIS
l Meets the BS6450 Transmitter Short-Circuit
Requirements for E1 Applications
l Compliant with:
– ITU-T Recommendations: G.703, G.732,
G.775 and I.431
– American National Standards (ANSI): T1.102,
T1.105, T1.403, T1.408, and T1.231
– FCC Rules and Regulations: Part 68 and Part
15
– AT&T Publication 62411
– ETSI ETS 300 011, 300 233, TBR 12/13
– TR-NET-00499
Description
The CS61581 is a primary rate line interface unit capa-
ble of operation in both short haul (intraoffice) and long
haul applications. The CS61581 combines the com-
plete analog transmit and receive circuitry for a single,
full-duplex interface at T1 and E1 rates. The device is
pin and function compatible with the Level One LXT310
and LXT318 (the latter in the host mode only). The de-
vice can also replace LXT359 and LXT360. Enhanced
functionality is available through an extended register
set allowing short haul operation, custom pulse shape
generation, QRSS pattern generation, detection and er-
ror counting, and generation and detection of loop up
and loop down codes. The CS61581 features Crystal®
low-power impedance-matched line drivers and crystal-
less jitter attenuation.
ORDERING INFORMATION
CS61581-IL
28-pin PLCC
CS61581-IP
28-pin PDIP
DS211PP8
APR ‘00
TCLK
TDATA/TPOS
UBS/TNEG
JASEL
RCLK
RDATA/RPOS
BPV/RNEG
INT/NLOOP
LOS
2
3
4
E
N
C
O
D
E
R
11
Q
R
S
S
REMOTE
LOOPBACK
8
7
6
D
E
C
O
D
E
R
23
12
INBAND
NLOOP
& LOS
PROCESSOR
RECEIVE
CLOCK
GENERATOR
9
10
XTALIN
XTALOUT
521
22
14
15
MODE RV+
RGND TGND
TV+
JITTER
ATTEN
TIMING
& DATA
RECOVERY
LOS/
NLOOP
Clear
REGISTERS & CONTROL LOGIC
TAOS Enable
LBO Select
JITTER
ATTEN
TRANSMIT
TIMING &
CONTROL
PULSE
SHAPING
CIRCUITRY
ROM / RAM
LINE DRIVERS
SERIAL
PORT
LLOOP
Enable
LOCAL
LOOPBACK
(ANALOG)
SH/LH
EQUALIZER
CONTROL
SLICERS
& PEAK
DETECT
NOISE &
CROSSTALK
FILTERS
SH
MAGNITUDE
EQUALIZER
AGC
SH
13
16
28
26
27
24
25
18
19
20
1
TTIP
TRING
CLKE/TAOS
CS/RLOOP
SCLK/LLOOP
SDI/LBO1
SDO/LBO2
LATN
RTIP
RRING
MCLK
LOCAL
LOOPBACK
(DIGITAL)
Copyright
© Cirrus Logic, Inc. 2005
(All Rights Reserved)
http://www.cirrus.com
CS61581
T1/E1 Universal Line Interface
AUG ‘05
DS211F1




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