Overview
The PCA9564PW,118 is an integrated circuit designed by NXP USA Inc. in CMOS technology, serving as an interface between most standard parallel-bus microcontrollers/microprocessors and the serial I²C-bus. This device enables bi-directional communication between the parallel bus system and the I²C-bus, operating as either a master or a slave and capable of transmitting or receiving data. It is particularly useful for adding I²C-bus ports to controllers or processors that do not have one, or for adding multiple I²C-bus ports to those that need them.
Key Specifications
| Specification | Value | Comments |
|---|---|---|
| Operating Supply Voltage | 2.3 V to 3.6 V | 5 V tolerant I/Os |
| I²C Frequency (Master Mode) | Up to 360 kHz | Faster I²C interface compared to PCF8584 |
| I²C Frequency (Slave Mode) | Up to 400 kHz | Faster I²C interface compared to PCF8584 |
| Parallel Interface Speed | Up to 50 MHz | Compatible with faster processors |
| Clock Source | Internal 9 MHz oscillator | No external timing element required |
| ESD Protection | Exceeds 2000 V HBM, 200 V MM, and 1000 V CDM | Compliant with JESD22 standards |
| Package Types | DIP20, SO20, TSSOP20, HVQFN20 | Variety of package options available |
Key Features
- Parallel-bus to I²C-bus protocol converter and interface
- Multi-master capability
- Internal oscillator reduces external components
- Standard and fast mode I²C capable and compatible with SMBus
- ESD protection exceeds industry standards
- Latch-up testing compliant with JEDEC Standard JESD78
- Bidirectional data transfer between I²C-bus and parallel-bus microcontroller on a byte-wise basis using interrupt or polled handshake
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
Q & A
- What is the primary function of the PCA9564PW,118? The PCA9564PW,118 serves as an interface between most standard parallel-bus microcontrollers/microprocessors and the serial I²C-bus.
- What are the operating supply voltage ranges for the PCA9564PW,118? The operating supply voltage ranges from 2.3 V to 3.6 V, with 5 V tolerant I/Os.
- What are the maximum I²C frequencies for master and slave modes? The maximum I²C frequency for master mode is 360 kHz, and for slave mode, it is 400 kHz.
- Does the PCA9564PW,118 have an internal clock source? Yes, it contains an internal 9 MHz oscillator.
- What types of ESD protection does the PCA9564PW,118 offer? It exceeds 2000 V HBM, 200 V MM, and 1000 V CDM, compliant with JESD22 standards.
- In what package types is the PCA9564PW,118 available? It is available in DIP20, SO20, TSSOP20, and HVQFN20 packages.
- Can the PCA9564PW,118 operate as both master and slave on the I²C-bus? Yes, it can operate as both master and slave and can be a transmitter or receiver.
- How does the PCA9564PW,118 handle data transfer between the I²C-bus and the parallel-bus microcontroller? Data transfer is carried out on a byte-wise basis using either an interrupt or polled handshake.
- What is the purpose of the internal oscillator in the PCA9564PW,118? The internal oscillator reduces the need for external timing elements and is used for all I²C timing.
- Is the PCA9564PW,118 compatible with SMBus? Yes, it is compatible with both standard and fast mode I²C and SMBus.
