SC16C554BIB80,551

Overview

The SC16C554BIB80,551 is a quad Universal Asynchronous Receiver/Transmitter (QUART) manufactured by NXP Semiconductors. It operates at supply voltages of 5 V, 3.3 V, and 2.5 V within an industrial temperature range of -40 °C to +85 °C. 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 four selectable interrupt trigger levels. The component utilizes an LQFP80 package and provides compatibility with Intel (16 mode) and Motorola (68 mode) bus interfaces.

Feature Summary

• Quad UART architecture supporting serial data communications with parallel-to-serial conversion capabilities.
• Integrated 16-byte transmit and receive FIFOs with programmable auto-RTS and auto-CTS hardware flow control.
• Dual interface modes allowing selection between Intel (16 mode) and Motorola (68 mode) bus protocols via the 16/68 pin.
• Comprehensive modem interface control including CTS, RTS, DSR, DTR, RI, and CD signals for each channel.

Applications

• High-speed serial communication systems requiring multi-channel asynchronous data transfer.
• Industrial control networks utilizing shared environments with fast data processing requirements.
• Embedded systems interfacing with high-speed modems or network equipment.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and electrical specifications. Ensure the procurement source provides valid traceability for the NXP Semiconductors brand. Confirm that the received components match the LQFP80 physical dimensions and lead configuration specified in the official datasheet.

Selection Notes

Select this component when a system requires four independent UART channels with integrated FIFO buffering to reduce CPU overhead. Choose the LQFP80 package variant if higher pin counts are necessary for individual chip selects per channel in 16 mode. Verify that the target application voltage aligns with the supported 2.5 V, 3.3 V, or 5 V operating ranges.

Part Context

This part belongs to the SC16C554B/554DB family of quad UARTs from NXP Semiconductors. It serves as an upward solution to the 16C454/554 series by adding 16-byte FIFOs. The device is designed to be pin and software compatible with industry-standard parts like the ST16C554 and TL16C554, facilitating direct replacements in existing designs.

Replacement Considerations

The SC16C554BIB80 is functionally equivalent to the SC16C554BIB80-T. It maintains pin and software compatibility with the ST16C554, TL16C554, and ST16C454/554 series devices. Designers should verify that the replacement part supports the required 16/68 mode interface selection.