CS61574A Datasheet, PDF (1/44 Pages) Cirrus Logic – T1/E1 LINE INTERFACE

CS61574A
CS61575
T1/E1 Line Interface
Features
• Provides Analog Transmission Line
Interface for T1 and E1 Applications
• Provides Line Driver, Jitter Attenuator
and Clock Recovery Functions
• Fully Compliant with AT&T 62411
Stratum 4 Jitter Requirements
• Low Power Consumption
(typically 175 mW)
• ^{B8ZS/HDB3/AMI Encoder/Decoder}
• ^{14 dB of Transmitter Return Loss}
General Description
The CS61574A and CS61575 combine 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. Both devices support processor-
based or stand-alone operation and interface 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
CS61574A has a receiver jitter attenuator optimized for
minimum delay in switching and transmission applica-
tions, while the CS61575 attenuator is optimized for
CPE applications subject to AT&T 62411 requirements.
The transmitter features internal pulse shaping and a
matched, constant impedance output stage to insure
signal quality on mismatched, poorly terminated lines.
Applications
• Interfacing Network Equipment such as DACS and
Channel Banks to a DSX-1 Cross Connect
• Interfacing Customer Premises Equipment to a
CSU
• Building Channel Service Units
ORDERING INFORMATION - See page 26.
( ) = Pin Function in Host Mode
[ ] = Pin Function in Extended Hardware Mode
(CLKE) (INT) (SDI) (SDO)
MODE _{TAOS LEN0 LEN1 LEN2} TGND TV+
2
TCLK
3
TPOS
[TDATA]
TNEG ⁴
[TCODE]
8
RCLK
7
RPOS
[RDATA]
RNEG ⁶
[BPV]
R
E
M
O
T
AMI,
E
B8ZS,
HDB3,
CODER
L
O
O
P
B
A
C
K
JITTER
ATTENUATOR
26
9
10
1
RLOOP XTALIN XTALOUT ACLKI
(CS)
5
L
O
28
23 24 25
14 15
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
18
MONITOR
11
27 12
21
22
LLOOP
(SCLK)
LOS
RV+ RGND
TTIP
TRING
RTIP
RRING
MTIP
[RCODE]
MRING
[PCS]
DPM
[AIS]
Crystal Semiconductor Corporation
P. O. Box 17847, Austin, Texas, 78760
[phone] FAX:[phone]
Copyright © Crystal Semiconductor Corporation 1996
(All Rights Reserved)
MAY ’96
DS154F2
1