SC16C650AIA44,512

Overview

The SC16C650AIA44,512 is a Universal Asynchronous Receiver/Transmitter (UART) manufactured by NXP Semiconductors. It operates at supply voltages of 2.5 V, 3.3 V, and 5 V within an industrial temperature range of -40 °C to +85 °C. The device features 32-byte transmit and receive FIFOs with error flags and supports data rates up to 3 Mbit/s at 5 V. It includes automatic hardware/software flow control, IrDA encoder/decoder capabilities, and DMA signaling via RXRDY and TXRDY pins. The component is housed in a PLCC44 package.

Feature Summary

• Provides 32-byte transmit and receive FIFOs to reduce external CPU bandwidth requirements
• Supports automatic hardware flow control using RTS and CTS signals or software flow control with programmable Xon/Xoff characters
• Integrates infrared (IrDA) encoder and decoder for serial communication compliance
• Offers internal loop-back capability for on-board diagnostics and fault isolation

Applications

• Serial data communications requiring high throughput and low CPU overhead
• Systems utilizing infrared (IrDA) wireless communication protocols
• Industrial control environments operating across wide temperature ranges
• Multi-channel networking applications requiring independent FIFO trigger levels

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm package type and tape-and-reel specifications. Confirm that the PLCC44 variant matches the target PCB footprint. Ensure compatibility with existing 16C450 software drivers if migrating from legacy components. Check current product lifecycle status as availability may vary.

Selection Notes

Select this UART when 32-byte FIFO depth is required to handle burst data traffic without excessive processor intervention. Choose the PLCC44 package if the design utilizes plastic leaded chip carrier footprints. Ensure the system clock frequency supports the desired baud rate divisor calculations. Verify voltage level compatibility with the host microcontroller interface.

Part Context

The SC16C650A series serves as an enhanced successor to standard 16C450 and 16C550 UARTs. It maintains pin and register compatibility with industry standards while adding larger FIFO buffers and advanced flow control features. This positioning allows for direct upgrades in existing designs to improve data throughput and system efficiency.

Replacement Considerations

The SC16C650AIB48 offers identical functionality but utilizes an LQFP48 package instead of PLCC44. The SC16C650AIN40 provides the same electrical characteristics in a DIP40 package. Verify pinout alignment and physical dimensions before substituting these variants.