155Mbps Copper Transceiver

Industry's First SFP for STM-1e Copper Interfaces
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Status Explanations for product status codes

Part Number Status
STM1E-SFP Active: In Production. See Ordering Information for details.
STM1E-SFPXX Active: In Production.


The STM-1e SFP is a small form-factor pluggable (SFP) transceiver compatible with the multisource agreement (MSA) for SFPs. The module uses Teridian Semiconductor’s latest generation of line interface units (LIUs) for 155Mbps electrical SONET/SDH interfaces (STM-1e). It also includes all the necessary components for interfacing to 75Ω telecommunications coaxial cable.

The 78P2351R physical layer IC includes clock and data recovery in both directions, an adaptive receiver equalizer, and a CMI encoder/decoder for transparent NRZ-to-CMI line code conversion. It provides receive loss-of-signal (LOS) detection and the option to disable (and three-state) the transmit driver. A serial interface provides access to an on-board EEPROM for identification information.

Data Sheet

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Key Features

  • Compatible with Multisource Agreement (MSA) for SFP Transceivers
  • 75Ω Coaxial Line Interface Compliant with ITU-T G.703/G.783 and Telcordia GR-253 for CMI Coded 155Mbps Electrical Interfaces
  • ITU-T G.783-Compatible LOS Detect
  • Transmit Power-Down Supported
  • Handles Over 12.7dB of Cable Loss
  • Extended Temperature Operation: -10°C to +85°C
  • 1.0/2.3 Coaxial Interface (Type A- or D-Coupling)
  • Low Power Dissipation (0.6W typ)


  • Telecom

Key Specifications:

STM1E/E4 Line Interface Units
Part Number Features VSUPPLY
Adaptive CMI Equalizer
Loss-of-Signal (LOS) Indicator
MSA-Compliant SFP Transceiver
Serial or LVPECL System Interface
3.3 1
See All STM1E/E4 Line Interface Units (3)

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

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Document Ref.: 19-5434 Rev 2; 2010-07-28
This page last modified: 2010-07-28