CS61305A Datasheet, PDF (1/44 Pages) Cirrus Logic – T1/E1 LINE INTERFACE

CS61305A
T1/E1 Line Interface
Features
General Description
• Provides Analog Transmission Line
Interface for T1 and E1 Applications
• Provides Line Driver, Jitter Attenuator
and Clock Recovery Functions
• Transmit Side Jitter Attenuation
Starting at 3 Hz, with > 300 UI of Jitter
Tolerance
• ^{B8ZS/HDB3/AMI Encoders/Decoders}
• ^{Compatible with SONET, M13 , CCITT}
G.742, and Other Asynchronous Muxes
• 50 mA Transmitter Short-Circuit
Current Limiting
The CS61305A 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 CS61305A is a pin-compatible replacement for the
LXT305A in most applications.
The CS61305A provides a transmitter jitter attenuator
making it ideal for use in asynchronous multiplexor
systems with gapped transmit clocks. The transmitter
features internal pulse shaping and a low impedance
output stage allowing the use of external resistors for
transmitter impedance matching. The receiver uses a
digital Delay-Locked-Loop clock and data recovery cir-
cuit which is continuously calibrated from a crystal
reference to provide excellent stability and jitter toler-
ance.
Applications
• Interfacing network transmission equipment such as
SONET multiplexor and M13 to a DSX-1 cross con-
nect.
• Interfacing customer premises equipment to a CSU.
ORDERING INFORMATION
CS61305A-IP1 28 Pin Plastic DIP
CS61305A-IL1 28 Pin Plastic PLCC
[ ] = Pin Function in Extended Hardware Mode
( ) = Pin Function in Host Mode
XTALIN XTALOUT
9
10
TCLK
TPOS
[TDATA]
TNEG
[TCODE]
RCLK
RPOS
[RDATA]
RNEG
[BPV]
2
3
4 AMI,
B8ZS,
8 HDB3
CODER
7
6
LOOP
BACK
JITTER
ATTENUATOR
27
26
LLOOP RLOOP
(SCLK) (CS)
(CLKE) (INT) (SDI) (SDO)
MODE TAOS LEN0 LEN1 LEN2 TGND TV+
5
28 23 24 25
14 15
CONTROL
PULSE
SHAPER
CLOCK &
DATA
RECOVERY
13 _TTIP
16
LINE DRIVER
LINE RECEIVER
19
TRING
RTIP
20 _RRING
SIGNAL
QUALITY
MONITOR
1
12
21
DRIVER
MONITOR
22
17 _MTIP
[RCODE]
18 _MRING
[PCS]
11 _DPM
[AIS]
ACLKI LOS
RV+ RGND
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
DS157PP3
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