14235R-2000

Overview

The Renesas 14235R-2000 is the FT 5000 Smart Transceiver, a LonWorks 2.0 platform component integrating a high-performance Neuron Core with a twisted-pair transceiver. It operates at 3.3V and features an internal system clock scaling up to 80MHz. The device includes 64KB RAM (44KB user-accessible), 16KB ROM, and supports external serial EEPROM or flash memory. It provides 12 bidirectional I/O pins, hardware UART with FIFOs, and JTAG support. Packaged in a 7mm x 7mm 48-pin QFN, it supports TP/FT-10 channels with polarity-insensitive free topology wiring.

Feature Summary

• Integrates a Neuron Core with an internal system clock scalable from 5MHz to 80MHz.
• Supports up to 254 Network Variables and 127 aliases for Neuron hosted devices.
• Includes a hardware UART with 16-byte receive and transmit FIFOs.
• Features 12 bidirectional I/O pins configurable in 35 standard models.

Applications

• Building automation systems requiring LONWORKS connectivity.
• Industrial control networks utilizing Free Topology or Bus Topology wiring.
• Smart network nodes needing high common-mode noise immunity.

Procurement Notes

Verify that the procurement includes the required FT-X3 Communications Transformer, as the transceiver must be implemented together with this specific transformer to maintain warranty compliance and ensure proper noise immunity. Confirm the presence of external serial memory components, as the FT 5000 lacks on-chip non-volatile memory for application storage.

Selection Notes

Select this component when migrating from Series 3100 transceivers, noting that hardware redesign is necessary due to differences in supply voltage and memory architecture. Ensure the design accommodates an external 10MHz crystal and supports either I2C or SPI interfaces for external EEPROM and optional flash memory. Verify compatibility with NodeBuilder FX Development Tool for firmware compilation.

Part Context

The 14235R-2000 is part of the Echelon Series 5000 chip family, serving as the successor to the FT 3120 and FT 3150 Smart Transceivers. It represents the next generation of LonWorks products designed to increase device capability while lowering development costs. The device is fully compliant with TP/FT-10 channels and maintains backward compatibility with previous generation transceivers.

Replacement Considerations

Public confirmed substitute part numbers: 14235R-500.