PCA9564N,112

Controllers Overview

The PCA9564N,112 is a parallel bus to I2C-bus controller manufactured by NXP USA Inc. It operates within a supply voltage range of 2.3 V to 3.6 V and supports an operating temperature range of -40°C to +85°C. The device features 5 V tolerant I/Os and includes an internal oscillator that eliminates the need for external timing components. It supports standard and fast mode I2C communication with maximum master mode frequencies up to 360 kHz and slave mode frequencies up to 400 kHz. The component is housed in a 20-DIP package with a pin spacing of 7.62 mm (0.300 inches).

Controllers Feature Summary

• Parallel-bus to I2C-bus protocol converter and interface
• Both master and slave functions
• Multi-master capability
• Internal oscillator reduces external components

Controllers Applications

• Add I2C-bus port to controllers/processors that do not have one
• Add additional I2C-bus ports to controllers/processors that need multiple I2C-bus ports
• Higher frequency, lower voltage migration path for the PCF8584
• Converts 8 bits of parallel data to serial data stream to prevent having to run a large number of traces across the entire PC board

Controllers Procurement Notes

Verify the specific ordering suffix and package type against current manufacturer documentation, as availability may vary. Confirm that the 20-DIP form factor meets the target PCB layout requirements. Check for any updated datasheet revisions that might affect electrical characteristics or register definitions compared to legacy versions.

Controllers Selection Notes

Select this component when interfacing standard parallel bus microcontrollers with I2C devices at lower voltages than traditional 5V systems. Ensure the host processor supports the required read/write strobes and chip enable signals. Verify that the internal oscillator frequency settings align with the desired I2C bus speed constraints.

Controllers Part Context

The PCA9564 serves as an interface between standard parallel-bus microcontrollers/microprocessors and the serial I2C-bus. It allows bidirectional communication on a byte-wise basis using interrupt or polled handshake. The device controls all I2C-specific sequences, protocol, arbitration, and timing without external elements.

Controllers Replacement Considerations

The PCA9564 is not footprint compatible with the PCF8584. While it offers higher frequencies and lower voltage operation, it is not code compatible due to design differences resembling Philips standard 80C51 I2C hardware.