PI7C8952AFAE

Controllers Overview

The PI7C8952 is a PCI Dual UART I/O Bridge designed for high-performance serial communication. It integrates two fully 16C550 software-compatible UARTs, each equipped with 128-byte transmit and receive FIFOs to support data transfer rates up to 15 Mbps in asynchronous mode. The device operates as a 32-bit PCI Bus 2.3 target, featuring universal PCI bus buffers that auto-sense 3.3V or 5V operation. It supports flexible clock prescalers ranging from 4 to 46 and accommodates dual power domains: 3.3V or 5.0V for PCI I/O and 1.8V-5.0V for UART I/O. The component includes an EEPROM interface for hardware reconfiguration and general-purpose I/O capabilities.

Controllers Feature Summary

• Integrates two high-performance 950-class UARTs with 128-byte FIFOs for efficient data buffering.
• Features universal PCI bus buffers that automatically detect and adapt to 3.3V or 5V logic levels.
• Supports automated in-band flow control using programmable Xon/Xoff characters and out-of-band control via CTS#/RTS# signals.
• Includes an EEPROM interface allowing system initialization configuration through hardware pin settings or pre-programmed data.

Controllers Applications

• Remote Access Servers
• Factory Automation and Process Control Systems
• Multi-port RS-232/RS-422/RS-485 Interface Cards

Controllers Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and environmental compliance. Ensure the procurement channel is authorized to maintain product integrity and warranty coverage. Confirm that the received components match the part marking specifications outlined in the datasheet revision history.

Controllers Selection Notes

Select this component when a PCI-based solution requires dual independent serial ports with substantial FIFO depth. It is suitable for systems needing automatic voltage level translation between the host bus and peripheral devices. Consider the integrated EEPROM feature if hardware-based configuration persistence is required during system boot-up sequences.

Controllers Part Context

This device belongs to the PCI bridge and UART family manufactured by Diodes Incorporated. It serves as a specialized interface solution for legacy PCI architectures requiring robust serial connectivity. The design emphasizes software compatibility with standard 16C550 drivers while providing enhanced performance features like large FIFOs and flexible clocking options.

Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.