SC16C850IBS,151

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SC16C850IBS,151 is a single-channel Universal Asynchronous Receiver and Transmitter (UART) operating within a 2.5 V to 3.3 V supply range. It supports serial data rates up to 5 Mbit/s with an external clock or 1.5 Mbit/s using a crystal. The device features 128-byte transmit and receive FIFOs to reduce CPU bandwidth requirements. It offers selectable Intel (16-bit) or Motorola (68-bit) bus interfaces via the 16/68 pin. The component includes IrDA encoder/decoder support, modem control interface, and automatic RS-485 driver turn-around. It operates in the industrial temperature range of −40 °C to +85 °C and is housed in an HVQFN32 package.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Supports high-speed serial communication with up to 5 Mbit/s data rate capability.
• Integrates 128-byte transmit and receive FIFOs for enhanced data throughput and reduced processor load.
• Provides flexible host interface compatibility with selectable Intel or Motorola bus modes.
• Includes built-in infrared IrDA encoder/decoder and automatic RS-485 driver control.

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• High-performance serial data communications in embedded systems
• Industrial control networks requiring robust UART functionality
• Infrared communication interfaces compliant with IrDA version 1.0
• RS-485 multi-drop network applications

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure correct package type and compliance status. Confirm that the HVQFN32 package variant matches the required PCB footprint and thermal management specifications. Check for AEC-Q100 compliance if automotive qualification is necessary, as standard versions may differ from qualified variants. Ensure the selected part number aligns with the desired bus interface mode configuration.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when a single UART channel with large FIFO buffers is required to minimize CPU intervention. Choose the HVQFN32 package for space-constrained designs needing a low-profile solution. Ensure the system clock can support the desired baud rate, noting the difference between external clock and crystal operation limits. Verify that the host processor supports either the Intel or Motorola bus interface protocol required by the application.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

The SC16C850 serves as an upward-compatible successor to the SC16C650B and SC16C550B, offering increased FIFO depth from 32 bytes to 128 bytes. It maintains software compatibility with previous generations while adding advanced features like programmable interrupt trigger levels and IrDA support. The IBBS suffix indicates the HVQFN32 package variant with Intel/Motorola selectable interface, distinguishing it from the TFBGA36 EET variant.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

The SC16C650B is a backward-compatible predecessor but offers only 32-byte FIFOs. Direct replacement requires verifying that the smaller buffer size meets the application's throughput requirements. Other SC16C850 variants exist with different packages, such as the IET model in TFBGA36, which are functionally identical but require different PCB footprints.