SC16C550IB48,128

Overview

The SC16C550IB48,128 is a Universal Asynchronous Receiver/Transmitter (UART) manufactured by NXP USA Inc. It features 16-byte transmit and receive FIFOs with error flags and an integrated infrared encoder/decoder. The device supports 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. It operates within an industrial temperature range of -40 °C to +85 °C. The component is housed in a 48-lead LQFP package (7x7x1.4 mm) and maintains pin compatibility with industry-standard ST16C550, TL16C550, and PC16C550 devices.

Feature Summary

• Integrated 16-byte transmit and receive FIFOs with selectable trigger levels for DMA mode transfers
• Built-in infrared (IrDA) encoder and decoder interface capabilities
• Programmable automatic hardware flow control using RTS and CTS signals
• Software-selectable Xon/Xoff characters for software flow control

Applications

• Serial data communications requiring high throughput and low CPU overhead
• Infrared communication interfaces utilizing SIR protocols
• Systems requiring pin-compatible upgrades from legacy 16C450 UART designs

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm package type and temperature grade. Ensure that any requested substitutions maintain functional equivalence regarding FIFO depth and IrDA support. Confirm RoHS compliance status through current datasheets prior to procurement.

Selection Notes

Select this component when system requirements include 16-byte buffering and infrared encoding. Verify voltage supply constraints match the 2.5 V, 3.3 V, or 5 V operational ranges. Ensure the LQFP48 package fits the PCB layout. Check if auto-flow control features are necessary to reduce software interrupt loads compared to standard 16C450 implementations.

Part Context

This part belongs to the SC16C550 family of UARTs, which are designed as upward solutions to the 16C450. It provides enhanced performance through larger FIFOs and additional control registers. The IB48 designation specifically identifies the LQFP48 plastic low profile quad flat package variant suitable for surface mount applications.

Replacement Considerations

The SC16C550IB48 is functionally equivalent to the ST16C550, TL16C550, and PC16C550 in terms of pinout and basic operation. Substitutions must verify identical FIFO sizes and IrDA support. Direct replacements include other manufacturers' 16C550 variants that meet the same electrical and timing specifications.