Overview
The PCA9564BS,118 is an integrated circuit designed by NXP USA Inc. to serve as an interface between standard parallel-bus microcontrollers/microprocessors and the serial I2C-bus. This device, fabricated in CMOS technology, enables bi-directional communication between the parallel bus system and the I2C-bus, operating as either a master or a slave. It is particularly useful for adding I2C-bus ports to controllers or processors that do not have one, or for expanding the number of I2C-bus ports in existing systems.
Key Specifications
| Parameter | Description |
|---|---|
| Package Type | 20-HVQFN (5x5) |
| Operating Supply Voltage | 2.3 V to 3.6 V |
| I2C-bus Compatibility | Standard and Fast mode (up to 400 kHz), compatible with SMBus |
| ESD Protection | Exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101 |
| Latch-up Testing | Exceeds 100 mA per JEDEC Standard JESD78 |
| Internal Oscillator | 9 MHz internal oscillator |
| I/O Pins | 8 bits of parallel data converted to serial data stream |
Key Features
- Parallel-bus to I2C-bus protocol converter and interface
- Multi-master capability
- Internal 9 MHz oscillator reduces external components
- 5 V tolerant I/Os
- Communication with the I2C-bus on a byte-wise basis using interrupt or polled handshake
- Active-LOW reset (RESET) input pin resets device to power-up default state
- Interrupt request (INT) output pin is active-LOW and open-drain
- Low standby current
- Operating temperature range: -40 °C to +85 °C
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 PCA9564BS,118?
The PCA9564BS,118 serves as an interface between standard parallel-bus microcontrollers/microprocessors and the serial I2C-bus, enabling bi-directional communication.
- What are the operating supply voltage ranges for the PCA9564BS,118?
The device operates within a supply voltage range of 2.3 V to 3.6 V.
- Is the PCA9564BS,118 compatible with SMBus?
Yes, it is compatible with both Standard and Fast mode I2C-bus and SMBus.
- What type of oscillator does the PCA9564BS,118 use?
The device uses a 9 MHz internal oscillator.
- What is the purpose of the internal oscillator?
The internal oscillator reduces the need for external timing elements.
- What is the temperature range for the PCA9564BS,118?
The operating temperature range is -40 °C to +85 °C.
- How does the PCA9564BS,118 handle ESD protection?
The device exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101.
- What is the role of the RESET pin in the PCA9564BS,118?
The RESET pin, when set to LOW, clears internal registers and resets the I2C state machine.
- Can the PCA9564BS,118 operate as both master and slave?
Yes, the device can operate as both master and slave on the I2C-bus.
- What is the significance of the INT pin in the PCA9564BS,118?
The INT pin is an active-LOW, open-drain output that requires a pull-up device and is used for interrupt requests.
