PC16552DVX

Overview

The PC16552DVX is a dual universal asynchronous receiver/transmitter (DUART) fabricated in advanced M2CMOS technology. It features two independent serial channels with on-chip 16-byte transmit and receive FIFOs to reduce CPU overhead. The device operates at a single 5V supply voltage and supports data rates up to 1.5 Mbps using a 24 MHz crystal clock. It utilizes a 44-pin PLCC package and provides complete modem control capabilities, programmable baud rate generators, and a prioritized interrupt system.

Feature Summary

• Dual independent UART channels with shared CPU interface
• Integrated 16-byte FIFO buffers for both transmission and reception
• Programmable baud rate generators supporting divisors from 1 to 65535
• Complete hardware modem control signals including CTS, RTS, DSR, DTR, RI, and DCD

Applications

• Portable appliances requiring serial communication interfaces
• Telecommunication network routers and Ethernet switches
• Cellular data devices and industrial process controls

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific ordering suffix matches the required package variant. Check for RoHS compliance status as indicated in official documentation. Validate that the part number corresponds to the exact functional specification required for the design.

Selection Notes

Select this component when dual independent serial ports are required within a single integrated circuit. Ensure the system design accommodates the 44-PLCC surface mount package dimensions. Verify that the host processor can support the necessary read and write cycle times of 84 ns. Confirm compatibility with existing 16450 software drivers if legacy code reuse is intended.

Part Context

This device belongs to the National Semiconductor PC16550 family of UARTs. It serves as the dual-channel version of the PC16550D, offering identical functionality for two separate serial links. The component is designed to be pin-compatible with other industry-standard DUARTs while providing enhanced FIFO performance.

Replacement Considerations

The TL16C552AFNR is a confirmed substitute part number available from Texas Instruments. Verify pinout compatibility and register set alignment before implementation.