SC16C554BIBM,157

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SC16C554BIBM,157 is a quad Universal Asynchronous Receiver and Transmitter (QUART) manufactured by NXP USA Inc. 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 is housed in an LQFP64 package (SOT414-1) and provides pin and software compatibility with industry-standard ST16C554 and TL16C554 devices.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Quad UART architecture supporting Intel (16 mode) and Motorola (68 mode) bus interfaces
• Integrated 16-byte transmit and receive FIFOs with programmable trigger levels for DMA support
• Automatic hardware flow control via programmable auto-RTS and auto-CTS functions
• Internal loopback capability for on-board diagnostics and communications link fault isolation

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• High-speed serial data communication systems requiring multi-channel connectivity
• Industrial environments utilizing shared network protocols or high-speed modems
• Embedded systems interfacing with Intel or Motorola microprocessor architectures

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package dimensions and internal bonding configurations. Confirm that the intended application environment remains within the specified industrial temperature limits and voltage requirements. Ensure proper handling procedures are followed for the plastic low profile quad flat package during assembly.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when a system requires four independent asynchronous channels with integrated FIFO buffering to reduce CPU overhead. Verify interface compatibility with either Intel or Motorola bus standards based on the 16/68 mode selection pin. Consider the LQFP64 package constraints regarding modem pin availability compared to larger packages like PLCC68.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This part belongs to the SC16C554B/554DB family of quad UARTs designed as upward solutions to legacy 16C454/554 devices. The IBM variant specifically denotes the LQFP64 package configuration with body dimensions of 7 × 7 × 1.4 mm. It maintains functional equivalence to standard industry parts while offering enhanced throughput capabilities through its FIFO structures.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

The SC16C554BIBM is pin and software compatible with the ST16C554 and TL16C554. Designers replacing these components should verify that the substitute part supports the required 16-byte FIFO depth and operating voltage ranges.