14235R-500

Overview

The Renesas 14235R-500 is the FT 5000 Smart Transceiver, a System-on-Chip integrating a high-performance Neuron Core with a free topology twisted-pair transceiver. Designed for LONWORKS 2.0 platforms, it supports TP/FT-10 channels at 78 kbps using Differential Manchester encoding. The device operates on 3.3V power with 5V-tolerant digital I/O and features an internal system clock scalable up to 80MHz. It includes 64KB RAM (44KB user-accessible), 16KB ROM, and requires external serial EEPROM or flash for non-volatile storage. Packaged in a 48-pin QFN (7mm x 7mm), it supports polarity-insensitive wiring topologies including star, bus, daisy-chain, loop, and mixed configurations.

Feature Summary

• Integrates a Neuron Core with internal system clock scaling from 5MHz to 80MHz and hardware multiplier/divider.
• Supports up to 254 Network Variables and 127 aliases via Neuron firmware version 19.
• Features 12 bidirectional 5V-tolerant I/O pins with 35 programmable standard I/O models.
• Includes hardware UART with 16-byte receive and transmit FIFOs and user-programmable interrupts.

Applications

• Building automation systems requiring LONWORKS connectivity.
• Industrial control networks utilizing Free Topology wiring.
• Smart metering and utility infrastructure nodes.
• HVAC and lighting control systems.

Procurement Notes

Verify that the component is sourced as the FT 5000 Smart Transceiver. Confirm the package type is 48-pin QFN. Ensure compatibility with the required Neuron firmware version 19. Check for necessary external memory components, as the device lacks on-chip user-accessible non-volatile memory. Validate supply voltage requirements of 3.3V.

Selection Notes

Select this component for applications requiring high-performance LONWORKS processing with flexible network topology support. Note that it requires external serial EEPROM or flash memory for application code and configuration data storage. Ensure the design accommodates the 48-pin QFN footprint and provides a 10MHz crystal oscillator input. Verify that the host system can support the 3.3V logic levels and 5V-tolerant I/O interfaces.

Part Context

The 14235R-500 is part of the Series 5000 family, succeeding the FT 3120 and FT 3150 Smart Transceivers. It is designed to lower development costs while increasing capability within the LONWORKS ecosystem. The device is backward compatible with previous generation Neuron Core applications when recompiled with NodeBuilder FX Development Tool. It serves as a key product for next-generation smart network nodes.

Replacement Considerations

The FT 3120 and FT 3150 are previous-generation counterparts but require hardware redesign due to differences in supply voltage and memory architecture. Direct pin-for-pin replacement is not supported without board modification. Ensure any substitute maintains compatibility with TP/FT-10 channel specifications and Neuron firmware version 19.