SC16C550BIBS128

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SC16C550BIBS128 is a Universal Asynchronous Receiver and Transmitter (UART) in an HVQFN32 package. It supports serial data rates up to 3 Mbit/s at 5 V, 2 Mbit/s at 3.3 V, and 1 Mbit/s at 2.5 V. The device features 16-byte transmit and receive FIFOs with programmable trigger levels. It operates within the industrial temperature range (-40 °C to +85 °C) and is pin-compatible with ST16C550, TL16C550, and PC16C550 devices.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Supports 5 V, 3.3 V, and 2.5 V operation with industrial temperature range capability
• Includes 16-byte transmit and receive FIFOs for enhanced data throughput
• Provides automatic hardware flow control via auto-RTS and auto-CTS modes
• Features internal loopback capability for on-board diagnostics

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• High-speed modem interfaces requiring fast data processing
• Shared network environments needing reduced CPU bandwidth usage
• Multi-channel serial communication systems

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix matches the required package type and environmental rating. Confirm voltage compatibility with the target system logic levels. Ensure the HVQFN32 package thermal pad is properly soldered to the PCB for adequate heat dissipation and electrical grounding during assembly.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when pin compatibility with legacy 16C450/550 designs is required alongside improved FIFO performance. Consider the HVQFN32 package constraints, specifically the absence of TXRDY and RXRDY DMA signals compared to other packages. Verify that the baud rate generator can accommodate the necessary external clock frequency for the desired data rate.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This UART belongs to the SC16C550B family, designed as an upward solution to the standard 16C450. It retains register compatibility while adding 16-byte FIFOs to handle high-speed modems and shared networks more efficiently. The IB suffix indicates the HVQFN32 plastic thermal enhanced very thin quad flat package variant.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

Pin-compatible replacements include ST16C550, TL16C550, and PC16C550. Note that DMA signaling functions are not available in the HVQFN32 package, unlike the PLCC44 or LQFP48 variants.