PCF8584P,112

Controllers Overview

The PCF8584P,112 is an I²C-bus controller integrated circuit manufactured by NXP USA Inc., housed in a 20-lead plastic dual in-line package (DIP20). It serves as an interface between standard parallel-bus microcontrollers and the serial I²C-bus. The device supports both master and slave functions with automatic detection of 80XX or 68000-type bus interfaces. Operating supply voltage ranges from 4.5 V to 5.5 V, and the operating temperature range is −40 °C to +85 °C. Key features include multi-master capability, programmable interrupt vectors, and special modes such as monitor mode and long-distance mode.

Controllers Feature Summary

• Parallel-bus to I²C-bus protocol converter compatible with most parallel-bus microcontrollers including 8049, 8051, 6800, 68000, and Z80
• Supports both master and slave functions with automatic detection and adaptation to bus interface type
• Includes I²C-bus monitor mode for passive monitoring and long-distance mode for extended communication via four unidirectional lines

Controllers Applications

• Interface between standard parallel-bus microcontrollers/microprocessors and the serial I²C-bus
• Multi-master systems requiring bus arbitration and control
• Long-distance serial communication applications using line drivers/receivers

Controllers Procurement Notes

Verify the component authenticity by checking the marking on the DIP20 package against the official datasheet specifications. Ensure the ordering suffix matches the requested variant. Confirm that the device meets the required environmental standards for the intended application temperature range. Cross-reference the part number with the manufacturer's current product availability status before finalizing procurement decisions.

Controllers Selection Notes

Select the PCF8584P when interfacing legacy parallel buses like 8051 or Z80 with I²C peripherals. Consider the DIP20 package for through-hole mounting requirements. Evaluate the need for specific modes such as monitor or long-distance operation. Ensure the system voltage aligns with the 4.5 V to 5.5 V operating range. Verify compatibility with the target microcontroller's clock frequency and timing requirements.

Controllers Part Context

The PCF8584 is part of NXP's family of I²C-bus controllers designed to bridge parallel and serial communication protocols. It supersedes earlier data sheets from 1997 and maintains compatibility with various microcontroller architectures. The device integrates internal registers for address, clock, and interrupt vector configuration, providing a robust solution for embedded systems requiring reliable I²C connectivity.

Controllers Replacement Considerations

The PCA9564 is noted as a similar device but operates at lower voltages and higher frequencies. It is not code-compatible and lacks pin compatibility with the PCF8584. No direct drop-in replacements are confirmed in the provided documentation. Designers should evaluate voltage levels and software modifications if considering alternative controllers.