CS61577 Datasheet, PDF (1/44 Pages) Cirrus Logic – T1/E1 LINE INTERFACE

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 75Ω and
120Ω E1 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+
2
TCLK
3
TPOS
[TDATA]
4
TNEG
[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
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
18
MONITOR
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
[phone] FAX:[phone]
Copyright © Crystal Semiconductor Corporation 1996
(All Rights Reserved)
MAY ’96
DS155PP2
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