PCA9665D,118

Controllers Overview

The PCA9665D,118 is an Fm+ parallel bus to I2C-bus controller manufactured by NXP Semiconductors. It serves as an interface between standard parallel-bus microcontrollers and the serial I2C-bus, supporting bidirectional communication in master or slave modes. The device operates within a supply voltage range of 2.3 V to 3.6 V and supports transmission speeds up to 1 MHz (Fast-mode Plus). It features a 68-byte data buffer, an internal oscillator trimmed to 15% accuracy, and 5 V tolerant I/Os. The component is housed in a 20-lead SOIC package (SOT163-1) and functions across a temperature range of -40 °C to +85 °C.

Controllers Feature Summary

• Parallel-bus to I2C-bus protocol converter enabling communication for controllers lacking native I2C interfaces
• Supports both master and slave functions 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 an internal oscillator eliminating the need for external timing elements

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 ordering suffix '118' corresponds to the specific tape-and-reel packaging configuration defined in the official datasheet. Confirm the package type matches the SO20 designation (SOT163-1) required for the target PCB footprint. Ensure the operating voltage requirements align with the specified 2.3 V to 3.6 V range before integration.

Controllers Selection Notes

Select this component when a system requires hardware-based I2C protocol handling to offload CPU resources from parallel bus architectures. The PCA9665D is suitable for applications needing Fast-mode Plus speeds up to 1 MHz. Consider the PCA9665A variant if 'glitch-free' restart capabilities are necessary for use with buffer drivers, as it differs in internal oscillator frequency and delay characteristics.

Controllers Part Context

The PCA9665D belongs to the PCA9665/PCA9665A family of Fm+ parallel bus to I2C-bus controllers. It shares the same footprint as the PCA9564 but offers enhanced features such as higher transmission speeds and increased drive capability. This series is designed to bridge legacy parallel systems with modern serial I2C peripherals efficiently.

Controllers Replacement Considerations

The PCA9665A is functionally compatible with the same footprint but offers different oscillator characteristics and glitch-free restart features. Verify register programming compatibility regarding oscillator frequencies before substitution.