PCA9665N,112

Controllers Overview

The PCA9665N,112 is an Fm+ parallel bus to I2C-bus controller manufactured by NXP Semiconductors. It serves as a bidirectional interface between standard parallel-bus microcontrollers and the serial I2C-bus, supporting both master and slave functions with multi-master capability. The device operates on a supply voltage of 2.3 V to 3.6 V and features 5 V tolerant I/Os. It supports transmission speeds up to 1 MHz (Fast-mode Plus) with up to 25 mA drive capability on SCL/SDA lines. Key specifications include a 68-byte data buffer, an internal oscillator trimmed to 15% accuracy, and compatibility with SMBus. The component is housed in a DIP20 package.

Controllers Feature Summary

• Parallel-bus to I2C-bus protocol converter enabling communication for controllers lacking native I2C interfaces
• Supports both master and slave modes with multi-master capability and interrupt or polled handshake operations
• Includes a 68-byte data buffer and software reset functionality on the parallel bus
• Features 5 V tolerant I/Os and robust ESD protection exceeding 2000 V HBM

Controllers Applications

• Adding I2C-bus ports to controllers or processors that do not have one
• Adding additional I2C-bus ports to controllers requiring multiple I2C connections
• Converting 8 bits of parallel data to a serial data stream to reduce PCB trace requirements

Controllers Procurement Notes

Verify the part number PCA9665N,112 against official NXP documentation to confirm the DIP20 package variant. Ensure the operating environment stays within the specified 2.3 V to 3.6 V supply range. Check for RoHS compliance status if required by your manufacturing standards. Confirm that the 5 V tolerant inputs are compatible with your system's logic levels. Validate the package footprint matches your PCB design constraints.

Controllers Selection Notes

Select this component when interfacing a parallel-bus MCU with an I2C peripheral without consuming CPU cycles for bit-banging. It is suitable for systems requiring Fast-mode Plus speeds up to 1 MHz. Consider the 68-byte buffer for efficient bulk data transfers. Ensure the 2.3 V to 3.6 V supply voltage aligns with your system power rails. Verify that the DIP20 package fits your assembly process.

Controllers Part Context

The PCA9665 is part of NXP's Fm+ parallel bus to I2C-bus controller family. It shares the same footprint as the PCA9564 but offers enhanced features like higher speed and larger buffering. The 'N' suffix indicates the DIP20 plastic dual in-line package. The ',112' suffix typically denotes specific ordering or tape-and-reel packaging details, though the core electrical characteristics remain consistent with the PCA9665 specification.

Controllers Replacement Considerations

The PCA9564 is a compatible alternative with the same footprint but fewer features. No other direct public substitutes are confirmed in the provided documentation.