Renesas 11500R-5000

Overview

11500R-5000 from Echelon is a Pyxos FT network communication IC embedding deterministic TDMA protocol and twisted-pair transceiver functionality in a 20-pin QFN 5mm × 5mm package. It enables self-organizing, polarity-insensitive control networks at 312.5 kbps with ≤25 ms scan time for up to 32 nodes, supporting direct digital I/O or SPI interface to microcontrollers in sensor/actuator endpoints.

For engineers reviewing the 11500R-5000 datasheet, 11500R-5000 pinout, 11500R-5000 application, or 11500R-5000 equivalent, key selection considerations include deterministic response time, Link Power capability over twisted pair, built-in 18-bit CRC + FEC error correction, ±40V common-mode immunity (non-isolated), and RoHS-compliant industrial temperature operation (–40°C to +85°C).

Technical Context

The 11500R-5000 implements a deterministic TDMA-based MAC layer with automatic retries on CRC failure and supports up to 128 four-byte Pyxos Network Variables (PNVs) per node. Its transceiver operates on unshielded twisted pair (e.g., CAT-5 or Belden 8471) with free topology wiring and integrated bias voltage generation (VBIAS pin).

It delivers high noise immunity via multiple coupling options - including transformer-isolated mode (277 VAC common-mode range) - and meets EN61000-4-2 Level 4 ESD (8 kV HBM on NET_A/NET_B), EN61000-4-4 Level 4 fast transient, and EN61000-4-6 Level 3 conducted RF immunity standards.

Key Specifications

Pinout & Package

20-pin QFN package, 5 mm × 5 mm, 0.5 mm pitch, exposed thermal pad grounded. Pin 7, 10, 14, 17, and 18 are GND; dual VDD3 pins (12 & 16) support low-impedance power routing.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar embedded deterministic control networking applications.

Compared with FTT-10A-1 and PLT-22, the 11500R-5000 integrates both MAC and PHY in one chip, delivers guaranteed ≤25 ms response, and supports Link Power - making it optimal for new sensor/actuator designs requiring compact size, low wiring cost, and deterministic behavior.

Availability

11500R-5000 is available at Aetrix Electronics and suitable for HVAC systems, industrial safety devices, elevator control systems, and office automation equipment requiring stable component supply, long lifecycle support, and RoHS-compliant industrial-grade operation.

Supply support for 11500R-5000 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Echelon Corporation was a pioneer in control networking, developing LonWorks and Pyxos platforms for interoperable, self-configuring distributed systems before its assets were acquired by Adesto Technologies (now part of Dialog Semiconductor).

The 11500R-5000 belongs to the Pyxos FT family, designed specifically for deterministic, low-cost, self-organizing embedded control networks inside machines, sensors, and actuators - targeting industrial automation, building systems, and transportation equipment.

FAQ

What is the primary function of the 11500R-5000 in a control network?

The 11500R-5000 serves as a complete Pyxos FT Point - integrating both the deterministic TDMA protocol stack and the twisted-pair transceiver in a single IC. It enables self-organizing, polarity-insensitive networking for sensors and actuators without requiring an external microcontroller for basic operation. The 11500R-5000 supports direct digital I/O or SPI interface, making it suitable for ultra-compact smart endpoints in industrial and building automation systems.

Does the 11500R-5000 require an external crystal oscillator?

Yes, the 11500R-5000 requires an external crystal oscillator connected between XIN (Pin 8) and XOUT (Pin 9). The datasheet specifies standard 3.6864 MHz or 7.3728 MHz crystals for precise timing alignment across the Pyxos FT network. No internal oscillator is provided; timing accuracy depends entirely on the external crystal's stability and load capacitance matching.

Can the 11500R-5000 operate without Link Power?

Yes, the 11500R-5000 can operate from local 3.3 V supply only, independent of Link Power. Its VDD3 pins (12 and 16) accept regulated 3.3 V ±10%, and all logic/I/O functions remain fully operational. Link Power is an optional feature that delivers up to 100 mA at 3.3 V DC over the same twisted pair used for communication - useful for simplifying wiring in distributed endpoints, but not mandatory for basic operation of the 11500R-5000.

How does the 11500R-5000 achieve polarity-insensitive wiring?

The 11500R-5000 achieves polarity-insensitive wiring through internal differential receiver circuitry and automatic signal polarity detection on the NET_A and NET_B pins. During network initialization, the device identifies correct signal orientation and adapts accordingly - eliminating the need for consistent cable termination or color-coding in field installations. This behavior is inherent to the transceiver design and requires no configuration or external components to enable.

Is the 11500R-5000 compatible with existing LonWorks networks?

Yes, the 11500R-5000 interfaces with LonWorks networks via a Pyxos Pilot, which acts as a gateway supporting both ShortStack (62 NVs) and MIP (4096 NVs) configurations. While the 11500R-5000 itself operates on the Pyxos FT protocol, its published API and data type definitions match those of LonWorks, enabling seamless integration. The 11500R-5000 does not replace LonWorks transceivers but extends their reach into high-performance sensor/actuator layers.