SC16C554IB80,551

Overview

The SC16C554IB80,551 is a quad Universal Asynchronous Receiver and Transmitter (QUART) manufactured by NXP Semiconductors. It operates at supply voltages of 5 V, 3.3 V, and 2.5 V within the industrial temperature range. The device supports data rates up to 5 Mbit/s at 5 V and 3.3 V, and up to 3 Mbit/s at 2.5 V. It features 16-byte transmit and receive FIFOs with error flags, automatic hardware or software flow control, and an infrared encoder/decoder interface. The component is housed in an LQFP80 plastic low profile quad flat package.

Feature Summary

• Quad UART architecture supporting serial data communications with parallel-to-serial conversion capabilities.
• Integrated 16-byte transmit and receive FIFOs designed to reduce external processor bandwidth requirements.
• Automatic hardware and software flow control mechanisms utilizing RTS, CTS, and programmable Xon/Xoff characters.
• Built-in infrared (IrDA) encoder and decoder for specialized communication interfaces.

Applications

• High-speed modem connections requiring fast data processing times.
• Shared network environments demanding efficient multi-channel serial data handling.
• Industrial systems operating within standard asynchronous error and framing bit protocols.

Procurement Notes

Verify the specific ordering suffix against current NXP documentation to confirm package type and operational parameters. Confirm that the LQFP80 variant matches the required pin configuration for the target design. Check for any discontinued status notifications as this product family has historical manufacturing records. Ensure compatibility with the intended bus interface mode selection before finalizing procurement.

Selection Notes

Select this component when a quad UART solution with integrated FIFOs is required for space-constrained designs. The LQFP80 package provides additional address pins compared to smaller footprints, facilitating complex bus decoding. Consider the 5 V, 3.3 V, and 2.5 V voltage options to match system power rails. Evaluate the need for IrDA support versus standard modem interface requirements during the initial design phase.

Part Context

This part belongs to the SC16C554/554D series, which offers upward compatibility with the 16C454/554 while adding enhanced FIFO and flow control features. It is pin-compatible with industry-standard ST16C554 and TL16C554 devices. The series supports both Intel-style 16-bit and Motorola-style 68-bit bus interfaces depending on the package and mode selection.

Replacement Considerations

The SC16C554IB80 is functionally equivalent to the SC16C554DIB80. Direct pin-compatible replacements include the ST16C554 and TL16C554, though these lack the advanced FIFO and flow control features. Verify that substitute components support the required LQFP80 package and voltage specifications.