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LXT6155

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 -Stand-alone; hardware mode` No external crystal required. A 19.44 MHz crystal is optional` Low power consumption (less than 760 mW typical...

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SeekIC No. : 004403649 Detail

LXT6155: 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 -Stand-alone; hardware mode` No externa...

LXT6155 Data Sheet

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Part Number:
LXT6155
Supply Ability:
5000

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Product Details

Description



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
   -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


Application

` 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
` 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


Pinout

Connection Diagram


Specifications

Parameter Sym Min Max Unit
DC supply (reference to GND) Vcc   4.0 V
Input voltage, TTL pins Vin (TTL) GND -0.3 5.5 V
Input voltage, other pins Vin GND -0.3 VCC +0.3 V
Input current, any pin Iin -10 25 mA
Storage temperature Tstg -65 150 °C

CAUTION:
  - Operating at or beyond these limits may result in damage to the device.
  - Normal operation not guaranteed at these extremes.




Description

The LXT6155 is a front-end transceiver designed for 155 Mbps OC3/STM1/ATM transmission applications. Table 2 lists the standards with which the LXT 6155 is compliant.

The LXT6155 interfaces to either a fiber transceiver or a coax cable on the line side, and on the system side, to an SDH/SONET Overhead Terminator or an ATM UNI. The LXT 6155 can function in Hardware stand-alone mode, or in Software mode controlled through an industry standard Motorola compatible 4-wire serial microprocessor interface.

The LXT6155 can be set to operate in either CMI mode for the 75Ω coax interface or NRZ mode for the optical transceiver interface. The operating mode can be set in either hardware mode by using the MODE pin, or software mode by using Primary Control Register, bit 0.




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