SC28L198A1A,512

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SC28L198A1A,512 is an octal universal asynchronous receiver and transmitter (UART) designed for 3.3 V and 5 V supply voltages. It integrates eight full-duplex asynchronous channels, each equipped with 16-byte transmit and receive FIFOs to minimize interrupt overhead and prevent data overrun. The device supports a synchronous host interface with a 30 ns data bus release time and a 125 ns bus cycle time. Baud rates are generated via a fixed baud rate generator offering 22 standard rates or two programmable counters for non-standard speeds up to 500 Kbps. Each channel features independent receiver and transmitter clock selection, allowing dual-speed operation. The component includes automatic address detection in multi-drop mode, programmable Xon/Xoff flow control, and a watchdog timer for each receiver.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Eight independent full-duplex UART channels with 16-byte FIFOs for both transmission and reception.
• Synchronous host interface supporting burst mode access with fast data bus release times.
• Flexible baud rate generation using a fixed generator for standard rates or programmable counters for custom speeds.
• Integrated power-down mode that halts the oscillator while maintaining register contents.

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Statistical multiplexers
• Data concentrators
• Process control systems
• Terminal servers
• Computer-Printer/Plotter links

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix against the manufacturer's current product status documentation. Confirm the package type matches the required PCB footprint, as the device is available in 84-pin PLCC and 100-pin LQFP configurations. Ensure the voltage supply requirements align with the selected industrial temperature range variant before finalizing procurement.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when multiple serial communication channels are required on a single integrated circuit. The choice between 3.3 V and 5 V operation depends on the system power architecture. Consider the 16-byte FIFO depth for applications requiring reduced CPU interrupt handling. Verify that the host interface timing constraints are compatible with the system clock frequency.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This part belongs to the Philips/NXP Octal UART family, specifically the SC28L198 series. It serves as a high-density serial communication controller, superseding earlier versions from January 1999. The device is fabricated using 1.0 micron CMOS technology, balancing low cost with high integration density and low power consumption for embedded communication tasks.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

The SC28L198 is functionally and software compatible with the SC28L198 OCTAL UART. Designers should verify pinout compatibility if substituting with other octal UART variants, ensuring that FIFO depths and interrupt arbitration logic meet the application requirements.