SC16C754IB80,528

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SC16C754IB80,528 is a quad universal asynchronous receiver/transmitter (UART) featuring four independent channels with 64-byte transmit and receive FIFOs. It supports data rates up to 5 Mbits/s at 3.3 V and 5 V operation, and up to 3 Mbits/s at 2.5 V. The device includes automatic hardware and software flow control, programmable baud rate generation via an internal divisor, and configurable interrupt systems. It operates on an 8-bit peripheral bus with address lines A0-A2 for register selection. The component is housed in an LQFP80 plastic low profile quad flat package with dimensions of 12 × 12 × 1.4 mm.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Quad UART architecture with individual 64-byte FIFOs for each channel to reduce processor overhead.
• Supports both hardware flow control (Auto-RTS/Auto-CTS) and software flow control (Xon/Xoff) mechanisms.
• Programmable trigger levels for DMA and interrupt generation allow customized buffer management.
• Integrated modem control logic provides status monitoring and control signals including CTS, RTS, DSR, DTR, RI, and CD.

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Multi-port serial communication interfaces in embedded systems
• Industrial automation controllers requiring multiple UART connections
• Modem interface circuits with hardware flow control requirements
• Data acquisition systems utilizing DMA transfers for high-speed serial data

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix IB80 corresponds to the LQFP80 package variant when sourcing components. Confirm that the voltage supply requirements align with the target system's 3.3 V or 5 V rails, as performance characteristics vary by supply voltage. Ensure compatibility with existing pin layouts if replacing legacy SC16C554 or SC16C654 designs, noting the enhanced feature register additions.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when multiple independent serial ports are required within a single integrated circuit. The choice between hardware and software flow control depends on the external modem capabilities and system latency constraints. Consider the LQFP80 package availability if surface mount assembly is preferred over the PLCC68 option. Verify that the host processor can support the 8-bit data bus interface and address decoding logic required for register access.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This part belongs to the SC16C754 family of quad UARTs, which are enhancements over the dual-channel SC16C554 and SC16C654 devices. It maintains pin compatibility with these predecessors while adding features like larger FIFOs and enhanced flow control registers. The IB80 suffix specifically denotes the LQFP80 package version, distinguishing it from the IA68 PLCC68 variant.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

The SC16C754 is pin-compatible with the SC16C654IA68 and SC16C554IA68. When substituting, ensure the design accommodates the enhanced feature register (EFR) usage, as older devices may not support these bits. Verify that the replacement part number matches the required package type, either LQFP80 or PLCC68.