PC16550DVX/NOPB

Overview

The PC16550DVX/NOPB is a dual universal asynchronous receiver and transmitter (DUART) manufactured by Texas Instruments. This component integrates two independent UART channels within a single package, supporting standard RS-232 communication protocols. It operates with a supply voltage range typically spanning 4.5V to 5.5V. The device features full hardware handshaking capabilities including RTS, CTS, DTR, DSR, RI, and CD signals. It supports baud rates up to 1.8432 MHz when driven by appropriate clock sources. The unit utilizes a 20-pin Small Outline Package (SOIC) for surface mount assembly.

Feature Summary

• Integrates two fully independent UART channels for simultaneous serial communication tasks
• Supports complete hardware flow control via dedicated request-to-send and clear-to-send lines
• Compatible with standard asynchronous data formats including variable stop bits and parity options

Applications

• Industrial control systems requiring multiple serial interfaces
• Embedded computing platforms needing compact dual-port connectivity
• Telecommunications equipment utilizing standard RS-232 signaling

Procurement Notes

Verify the specific suffix NOPB indicates lead-free compliance and RoHS adherence according to manufacturer specifications. Confirm the DVX designation corresponds to the correct tape-and-reel packaging format intended for automated surface-mount assembly processes. Ensure compatibility with existing PCB footprints before procurement.

Selection Notes

Select this component when dual independent serial ports are required in a space-constrained design. Evaluate power consumption requirements against the specified operating voltage range. Consider the pin count and package dimensions relative to available board real estate compared to single-channel alternatives.

Part Context

This part belongs to the 16550 family of UART controllers, which are industry-standard components for serial data transmission. The PC prefix often denotes specific manufacturing or regional variants within Texas Instruments' portfolio. The NOPB suffix confirms environmental compliance, distinguishing it from older non-compliant versions while maintaining functional equivalence.

Replacement Considerations

Direct substitutes include other 16550-compatible DUARTs from various manufacturers. Verify register-level compatibility and pinout alignment before substitution. Alternative packages such as TSSOP may offer different thermal characteristics but require adapter considerations.