NXP SC16IS752IBS,151: A Dual UART with I²C/SPI Interface Bridge IC for Industrial Applications

In the architecture of modern industrial systems, seamless communication between microcontrollers with limited peripherals and numerous serial devices is a critical challenge. The NXP SC16IS752IBS,151 addresses this need as a highly integrated, dual-channel bridge IC that converts between popular control interfaces (I²C or SPI) and UART serial communication. This device effectively expands the serial port capabilities of a host processor, making it an indispensable component in space-constrained and noise-prone industrial environments.

Key Features and Functionality

At its core, the SC16IS752IBS,151 features two independent full-duplex UART channels, each capable of data rates up to 5 Mbps. This allows a single host microcontroller to communicate with two separate serial devices, such as Bluetooth modules, GPS receivers, sensors, or legacy industrial equipment, without requiring additional hardware UART ports on the MCU itself.

The bridge's primary strength lies in its flexible host interface selection. Engineers can choose to connect the IC to their main system controller via either the I²C-bus (at up to 400 kHz in Fast-mode or 3.4 MHz in High-speed mode) or the SPI interface (up to 15 MHz). This flexibility allows for easy integration into a wide variety of existing system designs, optimizing for either bus availability or required communication speed.

To ensure reliability in harsh industrial settings, the IC incorporates several robust features. These include industrial temperature range operation (-40°C to +85°C), which guarantees stable performance in environments with extreme thermal fluctuations. Furthermore, the device includes a programmable transmit and receive FIFO (64 bytes each per channel) to reduce the service overhead on the host processor and prevent data loss during high-throughput operations or interrupt latency.

Targeted Industrial Applications

The SC16IS752IBS,151 is engineered for demanding applications where reliability and interface expansion are paramount. Key use cases include:

Industrial Automation and Control: Connecting PLCs to multiple RS-232/RS-485 devices, motor drives, or HMIs.

Network Infrastructure: Adding console management ports (CLI) to routers, switches, and servers via serial communication.

Embedded Computing: Expanding the UART capabilities of single-board computers (SBCs) and application processors.

Point-of-Sale (POS) Systems: Interfacing with multiple peripherals like cash drawers, customer displays, and barcode scanners.

ICGOODFIND Summary

The NXP SC16IS752IBS,151 stands out as a robust and versatile solution for solving the serial port scarcity problem in industrial designs. Its dual UART capability, combined with the choice of I²C or SPI host interface, offers engineers exceptional design flexibility. The inclusion of features like FIFOs and industrial temperature range support makes it a reliable and high-performance bridge IC, effectively future-proofing systems and simplifying the complexity of managing multiple serial device connections.

Keywords:

Dual UART Bridge

I²C/SPI Interface

Industrial Applications

Serial Communication

Host Controller Expansion