NS16C2552TVSX/NOPB

Overview

The NS16C2552TVSX/NOPB is a dual universal asynchronous receiver/transmitter (UART) integrated circuit manufactured by Texas Instruments. It features two independent UART channels, each equipped with a 16-byte transmit and receive FIFO buffer to enhance data throughput and reduce processor overhead. The device operates within a supply voltage range of 4.75 V to 5.5 V and supports data rates up to 1.8432 Mbps. It functions reliably across an industrial temperature range from -40°C to +85°C. The component is housed in a 48-lead TQFP package suitable for surface-mount technology applications.

Feature Summary

• Dual independent UART channels with dedicated 16-byte FIFO buffers for efficient data handling
• Supports standard serial communication protocols including RS-232, RS-422, and RS-485
• Integrated modem control interface supporting hardware flow control signals

Applications

• Industrial automation systems requiring reliable serial communication
• Telecommunications equipment utilizing multi-channel serial interfaces
• Embedded control systems needing high-speed UART connectivity

Procurement Notes

Verify the complete part number including the suffix /NOPB to ensure lead-free compliance and specific packaging configuration. Confirm the manufacturer is Texas Instruments, as National Semiconductor was acquired. Check the datasheet for moisture sensitivity level requirements and reflow soldering profiles appropriate for the TQFP-48 package before assembly.

Selection Notes

Select this component when dual independent serial ports with FIFO buffering are required. Ensure the system operates at 5V logic levels. Verify that the 1.8432 Mbps maximum baud rate meets application needs. Consider the 48-pin TQFP footprint for PCB layout constraints compared to other package options in the NS16C2552 family.

Part Context

This part belongs to the NS16C2552 series of dual UARTs. It is functionally compatible with industry-standard 16C552 devices but offers enhanced FIFO capabilities. The /NOPB suffix indicates a non-plumb (lead-free) product compliant with RoHS directives. It serves as a direct replacement for legacy single or dual UART solutions in modern industrial designs.

Replacement Considerations

The NS16C2552N is a pin-compatible alternative. Verify if the specific FIFO trigger levels and interrupt logic match the existing design requirements when substituting.