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CS61577 Datasheet(PDF) 1 Page - Cirrus Logic

Part No. CS61577
Description  T1/E1 LINE INTERFACE
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Maker  CIRRUS [Cirrus Logic]
Homepage  http://www.cirrus.com
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Features
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
-
Software Selection Between 75
Ω and
120
Ω E1 Output Options
-
Internally Controlled E1 Pulse Width
-
B8ZS/HDB3/AMI Encoder/Decoder
General Description
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
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
MAY ’96
DS155PP2
1
Crystal Semiconductor Corporation
P. O. Box 17847, Austin, Texas, 78760
(512) 445-7222
FAX:(512) 445-7581
T1/E1 Line Interface
TTIP
TCLK
7
RRING
RTIP
TRING
TGND
14
CONTROL
LINE RECEIVER
LINE DRIVER
15
3
2
6
4
RCLK
8
27
LLOOP
(SCLK)
25
24
(INT)
LEN0
(SDI)
LEN1
(SDO)
LEN2
28
23
(CLKE)
TAOS
5
MODE
TPOS
[TDATA]
RPOS
[RDATA]
RNEG
[BPV]
TNEG
[TCODE]
MTIP
[RCODE]
DPM
[AIS]
LOS
12
21
RV+
22
RGND
13
19
20
17
11
18
16
MRING
[PCS]
XTALIN
9
XTALOUT
10
ACLKI
1
( ) = Pin Function in
Host Mode
[ ] = Pin Function in
Extended Hardware Mode
26
RLOOP
(CS)
R
E
M
O
T
E
L
O
O
P
B
A
C
K
AMI,
B8ZS,
HDB3,
CODER
JITTER
ATTENUATOR
PULSE
SHAPER
CLOCK &
DATA
RECOVERY
SIGNAL
QUALITY
MONITOR
DRIVER
MONITOR
TV+
L
O
C
A
L
L
O
O
P
B
A
C
K
Copyright
© Crystal Semiconductor Corporation 1996
(All Rights Reserved)
CS61577
This document contains information for a new product. Crystal
Semiconductor reserves the right to modify this product without notice.
Preliminary Product Information




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