STM1E-SFP08

STM1E-SFPxx 155Mbps Copper Transceiver Final Datasheet Features Compatible with the Multi-Source Agreement (MSA) for SFP transceivers 75 media interface compliant with ITU-T G.703 and Telcordia GR-253 for CMI coded 155Mbps electrical interfaces ITU-T G.783 compatible loss of signal detect Transmit power down and tri-state control Handles over 12.7dB of cable loss Extended Temperature operation: -20 C to 85 C 75 DIN 1.0/2.3 female coaxial media interface supports Type A and Type D coupling Low power dissipation (0.6 W typical) Compliant with RoHS 6/6 (lead-free) Benefits Compatible with existing OC3/STM1o line cards using the pluggable SFP form factor Provides end user flexibility on a per port basis Reduces cost to system developers for offering STM-1 electrical interfaces Eliminates risk of laser wear out for central office interconnects Description The STM1E-SFPxx is a Small Form-factor Pluggable (SFP) module compatible with the Multi Source Agreement (MSA) for SFP transceivers. The module utilizes the latest generation of Line Interface Units (LIUs) for 155 Mbit/s electrical interfaces (STM-1e, ES1) from Teridian Semiconductor Corporation (TSC). It also includes all the necessary components for interfacing to 75 telecommunications coaxial cable. The Teridian 78P2351R physical layer IC includes Clock & Data Recovery in both directions and a CMI encoder/decoder for transparent NRZ to CMI line code conversion. It provides Receive Loss of Signal (LOS) detection for electrical CMI interfaces and the option to disable (and tri-state) the transmit driver. A serial interface provides access to an on board EEPROM for identification information. STM1e Tx Disable (electrical) output signal Tx Data TERIDIAN 78P2351R STM1e Line Interface Unit Magnetics 1.0/2.3 Rx Data & Mini-coax Protection Rx LOS STM1e (electrical) MOD DEF 2:0 EEPROM XO input signal Figure 1: Transceiver Functional Diagram STM1E-SFPxx Datasheet - 1 - August 2008 v2-2 STM1E-SFPxx 155Mbps Copper Transceiver Final Datasheet Data and Control Interface The STM1E-SFPxx data I/Os accept and provide differential signals at 155.52Mbit/s. AC-coupling for both transmit and receive traces is handled internally and is thus not required on the host board. The receive data outputs (RD+/-) provide the recovered STM1/STS3 data to the host in NRZ coding. During Rx LOS of signal conditions, the receive outputs are squelched. The RD+/- traces on the host card should be of equal length and differentially terminated with 100 at the user SerDes. The transmit data inputs (TD+/-) accept STM1/STS3 NRZ data at CML or LVPECL levels. The transmit timing is recovered inside the 78P2351R LIU and used for the CMI line encoding and transmit pulse driver. The TD+/- traces on the host card should be of equal length. The physical layer IC used in the STM1E-SFPxx does not require reset or software configuration. Only an optional Transmit Disable control pin is available for enabling or powering down the transmit driver. For status monitoring, a Receive Loss of Signal indicator is provided. Loss of Signal detection for STM-1e (electrical) interfaces is inherently different from optical LOS detection. Reference Receiver Loss of Signal Condition section for more info on LOS detection criteria for STM-1e (ES1) interfaces. VccT 3.3V 78P2351R LIU VccR 4.7K Tx Disable 3.3V 82 82 TD+ 0.1uF to circuit TD- 0.1uF to circuit VCC Magnetics 130 130 & Coax I/F 75 ohm Protocol IC from circuit coax pair & SerDes VCC RD+ 20 0.1uF from circuit 100 RD- 20 0.1uF 170 170 Rx LOS MOD DEF2 EEPROM MOD DEF1 MOD DEF0 PLD / PAL STM1E-SFPxx 4.7K 4.7K 4.7K 4.7K 3.3V Figure 2: Typical Application Configuration STM1E-SFPxx Datasheet - 2 - August 2008 v2-2