14250R-300

14250R-300 Features

• Combines an ANSI/CEA 709.3-1999 compliant free topology twisted pairtransceiver with a Neuron 3120 or Neuron 3150 network processor core
• Supports polarity insensitive free topology star, daisy chain, bus, loop, ormixed topology wiring
• 78 kilobits per second bit rate for distances up to 500 metersin free topology or 2700 meters in bus topology with double terminations
• High performance Neuron network processor core enables concurrent pro-cessing of application code and networkpackets (40MHz maximum for FT 3120 smart transceiver, 20MHz maximumfor FT 3150 smart transceiver)
• 4Kbytes of embedded EEPROM for application code and configuration dataon the FT 3120 smart transceiver and 0.5Kbytes of embedded EEPROM forconfiguration data on the FT 3150 smart transceiver
• Interface for external memory for devices with larger memory requirements(FT 3150 smart transceiver only)
• 2Kbytes of embedded RAM for buffering network data and network variables
• 11 I/O pins with 34 programmable standard I/O modes minimizing external in-terface circuitry
• Unique 48-bit Neuron ID in every device for network installation and manage-ment
• Compact external transformer with patent pendingarchitecture providing exceptional immunity from magnetic interference andhigh frequency common mode noise
• Compatible with TP/FT-10 channels using FTT-10 and/or FTT-10A Free Topol-ogy Transceivers and, with suitable DC blocking capacitors, LPT-10 LinkPower Transceivers
• Communications parameters preprogrammed for the TP/FT-10 channel at10MHz
• 5V operation with low power consumption
• -40 to +85°C operating temperature range[3, 4FT 3120 transceiver in a 44-pin TQFPpackage[1]

14250R-300 Description

The FT 3120 and FT 3150 Free TopologySmart Transceiversintegrate a Neuron® 3120 or Neuron 3150network processor core, respectively, with afree topology twisted pair transceiver tocreate a low cost, smart transceiver on achip. Combined with Echelon's high per-formance FT-X1 or FT-X2 CommunicationTransformer, the FT 3120 and FT 3150smart transceivers set new benchmarks forperformance, robustness, and low cost.Ideal for use in LonWorks® devices destinedfor building, industrial, transportation,home, and utility automation applications,the FT 3120 and FT 3150 Free TopologySmart Transceivers can be used in bothnew product designs and as a means ofcost reducing existing nodes.The integral transceiver is fully compatiblewith the TP/FT-10 channel and can commu-nicate with devices using Echelon'sFTT-10A Free Topology Transceiver, and,when used with suitable DC isolation ca-pacitors, the LPT-11 Link Power Transceiver.The free topology transceiver supports po-larity insensitive cabling using a star, bus,daisy-chain, loop, or combination topology(see Figure 1)—freeing the installer from theneed to adhere to a strict set of wiringrules. Free topology wiring reduces thetime and expense of node installation by al-lowing the wiring to be installed in themost expeditious and cost-effective man-ner. It also simplifies network expansion byeliminating restrictions on wire routing,splicing, and node placement.The FT 3120 Free Topology Smart Trans-ceiver is a complete system-on-a-chip thatis targeted at cost-sensitive and small formfactor designs with a need for up to4Kbytes of application code. The Neuron3120 core operates at up to 40MHz[2], andincludes 4Kbytes of EEPROM and 2Kbytesof RAM. The Neuron firmware is pre-pro-grammed in an on-chip ROM. The applica-tion code is stored in the embeddedEEPROM memory and may be updatedover the network. The FT 3120 smart trans-ceiver is offered in a 32-lead SOIC packageas well as a compact 44-lead TQFP pack-age.The FT 3150 Free Topology Smart Trans-ceiver includes a 20MHz Neuron 3150 core,0.5Kbytes of EEPROM, and 2Kbytes ofRAM. Through its external memory bus, theFT 3150 smart transceiver can address upto 58Kbytes of external memory, of which16Kbytes of external nonvolatile memory isdedicated to the Neuron firmware. The FT3150 transceiver is supplied in a 64-leadTQFP package.The embedded EEPROM may be writtenup to 10,000 times with no data loss. Datastored in the EEPROM will be retained forat least 10 years.[3]Three different versions of the FT 3120 andFT 3150 Free Topology Smart Transceiversare available to meet a wide range of appli-cations and packaging requirements. SeeFT 3120 and FT 3150 Free Topology SmartTransceiver Ordering Information below forproduct offerings and descriptions.The FT-X1 is a through-hole communicationtransformer while the FT-X2 is a surfacemount transformer. Either transformer canbe used with the FT 3120 or FT 3150 FreeTopology Smart Transceivers. the FT-X1 andFT-X2 transformers have similar noise im-munity and performance characteristics.Models 14212R-500, 14222R-800, 14230R-450, 14240R, and 14250R-300 are compli-ant with the European Directive2002/95/EC on the restriction of the use ofcertain hazardous substances (RoHS) inelectrical and electronic equipment.