LXT6155 Datasheet, PDF (1/50 Pages) Intel Corporation – 155 Mbps SDH/SONET/ATM Transceiver

LXT6155
155 Mbps SDH/SONET/ATM Transceiver
Datasheet
The LXT6155 is a high speed fully integrated transceiver designed for 155 Mbps SDH/SONET/
ATM transmission system applications. The LXT6155 provides a LVPECL interface for fiber
optics modules, and a CMI interface for coax cable drive. These circuits are implemented using
Level One’s proven low power 3.3V CMOS analog and digital circuits.
The transmitter incorporates a parallel-to-serial converter, a frequency multiplier PLL, CMI line
encoders, and line interfaces for both coax cable and optical fiber. The receiver incorporates an
adaptive equalizer, a clock recovery PLL, Loss of Signal (LOS) detector, CMI and NRZ
decoders, a serial-to-parallel converter, and an SDH/SONET frame byte detector/aligner. At the
system interface, the LXT6155 offers both parallel 8-bit and serial differential interfaces. The
LXT6155 also operates in either Hardware stand-alone mode or Software mode. Software mode
is controlled by a serial microprocessor (µP) to program formats and operating/test modes.
Product Features
Applications
OC3/STM1 SDH/SONET Cross Connects
OC3/STM1 SDH/SONET Add/Drop Mux
OC3/STM1 Transmission Systems
OC3/STM1 Short Haul Serial Links
OC3/STM1 ATM/WAN Transmission
Systems
OC3/STM1 ATM/WAN Access Systems
Features
Complies with:
— Bellcore SONET GR-253
— ITU-T G.703/813/958 STM1
Two line interface formats:
— Fiber LVPECL NRZ
— Coax CMI
Transmit synthesizer PLL
Receive clock recovery PLL
Adaptive CMI equalizer
Analog circuitry for transformer drive
Programmable LOS function
CMI encoder and decoder
Serial/Parallel and Parallel/Serial
conversion
Byte alignment for SDH/SONET frames
Two modes of operation:
— Microprocessor controlled; software
mode
— Stand-alone; hardware mode
No external crystal required. A 19.44 MHz
crystal is optional
Low power consumption (less than 760
mW typical)
Operates from a single 3.3 V supply
64 pin LQFP package
Order Number: 249612-001
January 2001