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Cirrus Logic - T1/E1 LINE INTERFACE

Numéro de référence CDB61577
Description T1/E1 LINE INTERFACE
Fabricant Cirrus Logic 
Logo Cirrus Logic 





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CS61577
T1/E1 Line Interface
Features
General Description
Provides Analog Transmission Line
Interface for T1 and E1 Applications
Drop-in Replacement for CS61574 with
the Following Enhancements:
- Lower Power Consumption
- Transmitter Short-Circuit
Current Limiting
- Greater Transmitter Immunity
to Line Reflections
The CS61577 is a drop-in replacement for the
CS61574, and combines the complete analog transmit
and receive line interface for T1 or E1 applications in a
low power, 28-pin device operating from a +5V supply.
The CS61577 supports processor-based or stand-
alone operation and interfaces with industry standard
T1 and E1 framers.
The receiver uses a digital Delay-Locked-Loop which is
continuously calibrated from a crystal reference to pro-
vide excellent stability and jitter tolerance. The receiver
includes a jitter attenuator optimized for minimum delay
in switching and transmission applications. The trans-
mitter provides internal pulse shaping to insure
compliance with T1 and E1 pulse template specifica-
tions.
Applications
- Software Selection Between 75and
120E1 Output Options
- Internally Controlled E1 Pulse Width
- B8ZS/HDB3/AMI Encoder/Decoder
Interfacing Network Equipment such as DACS and
Channel Banks to a DSX-1 Cross Connect
Building Channel Service Units
ORDERING INFORMATION
CS61577-IP1
28 Pin Plastic DIP
CS61577-IL1
28 Pin Plastic PLCC
( ) = Pin Function in Host Mode
[ ] = Pin Function in Extended Hardware Mode
(CLKE) (INT) (SDI) (SDO)
MODE TAOS LEN0 LEN1 LEN2 TGND
TV+
TCLK
TPOS
[TDATA]
2
3
4
TNEG
[TCODE]
8
RCLK
RPOS
[RDATA]
RNEG
[BPV]
7
6
AMI,
B8ZS,
HDB3,
CODER
R
E
M
O
T
E
L
O
O
P
B
A
C
K
JITTER
ATTENUATOR
26
9 10
1
RLOOP XTALIN XTALOUT ACLKI
(CS)
5 28 23 24 25
14 15
L
O
LINE DRIVER 13
C
A
CONTROL
PULSE
SHAPER
16
L
L LINE RECEIVER 19
O CLOCK &
O DATA
P RECOVERY
20
B 17
A SIGNAL
C
K
QUALITY
MONITOR
DRIVER
MONITOR
18
11
27 12
21
22
LLOOP
(SCLK)
LOS
RV+ RGND
TTIP
TRING
RTIP
RRING
MTIP
[RCODE]
MRING
[PCS]
DPM
[AIS]
Preliminary Product Information This document contains information for a new product. Crystal
Semiconductor reserves the right to modify this product without notice.
Crystal Semiconductor Corporation
P. O. Box 17847, Austin, Texas, 78760
(512) 445-7222 FAX:(512) 445-7581
Copyright © Crystal Semiconductor Corporation 1996
(All Rights Reserved)
MAY ’96
DS155PP2
1

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