SC16C554DBIA68,512

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SC16C554DBIA68,512 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 an industrial temperature range of -40 °C to +85 °C. The device supports serial 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 PLCC68 package provides pin and software compatibility with industry-standard ST16C554D devices.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Supports Intel 16-bit and Motorola 68-bit interface modes via the 16/68 pin selection
• Includes 16-byte transmit and receive FIFOs with programmable trigger levels for DMA mode transfers
• Provides automatic hardware flow control through programmable auto-RTS and auto-CTS functions
• Features internal loopback capability for on-board diagnostics and fault isolation

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• High-speed serial communication in industrial automation systems
• Multi-channel data acquisition interfaces requiring FIFO buffering
• Embedded systems utilizing Intel or Motorola microprocessor architectures

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix against current NXP documentation to confirm package type and interface configuration. Confirm that the component meets the required industrial temperature specifications for the intended application environment before finalizing procurement decisions.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when a quad UART solution with high-speed capabilities and FIFO buffering is required. Ensure the target system supports either the Intel 16-mode or Motorola 68-mode interface logic. Verify voltage requirements align with the 5 V, 3.3 V, or 2.5 V operating ranges specified in the datasheet.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This part belongs to the SC16C554B/554DB series of quad UARTs from NXP Semiconductors. It serves as an enhanced successor to legacy 16C454/554 devices, offering increased throughput through integrated FIFOs while maintaining backward compatibility with standard register sets and pinouts.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

The SC16C554BIA68 is functionally equivalent and pin-compatible with the SC16C554DBIA68. Both variants share identical electrical characteristics and feature sets, differing primarily in their internal interrupt configuration bonding.