Modbus TCP/IP Server Chip (IS4350)

Name: Modbus TCP/IP Server Chip (IS4350)
SKU: 38548
Price: 5.83 USD
Availability: InStock

The IS4350 integrates both Modbus TCP/IP Server stack in a single chip, it is accessible from your uC via I2C.

Designed by Inacks in Spain

2025-07-01T11:18:15.309Z-Inacks IS4350 I2C Modbus TCPIP Server Integrated Circuit.png

2025-07-24T20:05:22.298Z-Inacks IS4360 Modbus TCP Client Chip general diagram.png

2025-05-15T17:46:39.704Z-IS4350_Top_View.png

2025-05-15T17:48:50.560Z-IS4350_Bottom_View.png

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Reels available for pick'n'place. If you need a specific protocol implementation, contact us.

The IS4350 integrates both Modbus TCP/IP Server stack in a single chip, it is accessible from your uC via I2C.

Description The IS4350 is a chip that integrates a Modbus TCP/IP Slave stack. It features an internal memory of 500 Holding Registers, accessible by both a microcontroller (via I2C) and a Modbus Mast…

Description

The IS4350 is a chip that integrates a Modbus TCP/IP Slave stack. It features an internal memory of 500 Holding Registers, accessible by both a microcontroller (via I2C) and a Modbus Master device (e.g., PLC, computer, etc.).

The goal of the IS4350 is to eliminate the engineering effort typically required to implement and validate Modbus TCP/IP communication. It offers a reliable, ready-to-use solution that helps reduce development time and speed up your time-to-market (TTM).

How it Works?

The chip provides two interfaces:

An I2C interface for your microcontroller, FPGA, Arduino, Raspberry Pi, etc.
➜ This is where your system reads/writes Modbus data.
A RMII to connect your preferred Ethnernet PHY transceiver.
➜ This is the fieldbus that connects to a PLC, computer, or machine.

The internal memory is composed of 504 registers: - 500 Holding Registers for user data. - 4 Configuration Registers for communication settings.

You can use the IS4350 in two main modes:

As a Sensor → your microcontroller writes data to the chip via I2C.
As an Actuator → your microcontroller reads data from the chip via I2C.
As an Advanced Device → your microcontroller reads and writes data to and from the chip via I2C.

➡️ Just read/write the registers you need — no protocol stack required.

Default Chip Settings

Default Modbus Settings:

Modbus Slave ID: 1
IP: DHCP

Default I2C Settings:

I2C Slave Address: 0x11 (fixed)
I2C Speed: 100 kHz (when pin 7 is tied to GND)

Examples and Documentation

Hardware Examples

👉 IS4350 Schematic Example

Download Software

qModMaster: Modbus TCP/IP Master Software
🔗 Download qModMaster

Download Documentation

📘 Online Wiki: Coming soon – stay tuned! www.inacks.com
📄 Datasheet: Coming soon – stay tuned! www.inacks.com

Need an Evaluation Board?

The Kappa4350Ard is an Arduino-form-factor evaluation board that lets you prototype and play with the TCP/IP Modbus Chip IS4350 over RS485.

For more information about the Evaluation Board you can also check: www.inacks.com