SC16C2550BIA44,529

Overview

The SC16C2550BIA44,529 is a dual Universal Asynchronous Receiver and Transmitter (UART) manufactured by NXP Semiconductors. It operates at supply voltages of 5 V, 3.3 V, and 2.5 V with an industrial temperature range. The device features two independent UART channels, each equipped with 16-byte transmit and receive FIFOs to reduce external CPU bandwidth requirements. It 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. The component is housed in a PLCC44 package and includes programmable baud rate generators, modem control interfaces, and DMA mode support.

Feature Summary

• Dual channel architecture with independent transmit and receive control for each UART section
• Integrated 16-byte transmit and receive FIFOs with selectable interrupt trigger levels
• Support for DMA mode data transfer utilizing TXRDYn and RXRDYn signals
• Internal loopback capability for on-board diagnostics and fault isolation

Applications

• High-speed modem applications requiring fast data processing
• Shared network environments demanding reduced CPU servicing time
• Industrial communication systems operating within the specified voltage ranges

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and availability status. Ensure that the PLCC44 package variant matches the target PCB footprint requirements. Cross-reference the part number with official distributor catalogs to validate authenticity and revision level before procurement.

Selection Notes

Select this component when a dual UART interface with integrated FIFOs is required for parallel-to-serial conversion. It serves as a pin-compatible replacement for legacy devices like the ST16C2550 while offering enhanced throughput via DMA capabilities. Consider the 5 V tolerant input pins for interfacing with mixed-voltage logic systems without additional level shifting components.

Part Context

This component belongs to the SC16C2550B family of dual UARTs produced by NXP Semiconductors. It is functionally equivalent to the 16C2450 upon power-up but provides superior performance through its 16-byte FIFOs. The device is software compatible with the INS8250 standard, facilitating migration from older UART architectures to modern high-speed serial communication designs.

Replacement Considerations

The SC16C2550B is pin and functionally compatible with the ST16C2550. It is also software compatible with the SC16C550. Designers replacing legacy parts should verify that the target system utilizes the 16C2450 or ST16C2550 pinout to ensure direct interchangeability without schematic modifications.