Overview
The PCA9535HFHP is a 16-bit I2C-bus and SMBus I/O expander produced by NXP USA Inc. This component is designed to provide additional I/O ports for microcontrollers and other ICs, enhancing the overall system's capability to interact with external devices. The PCA9535HFHP is particularly noted for its low power consumption and robust feature set, making it suitable for a wide range of applications, including industrial, automotive, and consumer electronics.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | HWQFN24: plastic thermal enhanced very very thin quad flat package; no leads; 24 terminals; 0.5 mm pitch, 4 mm x 4 mm x 0.75 mm body |
| Number of I/Os | 16-bit |
| Interface | I2C-bus and SMBus |
| Power Supply Voltage | 1.65 V to 5.5 V |
| Standby Current | 1 μA Max |
| Operating Temperature | -40°C to 85°C |
| Interrupt Output | Open-drain active-low interrupt output |
Key Features
- Low standby-current consumption of 1 μA Max
- I2C to Parallel port expander
- Configurable I/Os as inputs or outputs
- Polarity Inversion register for active-high or active-low operation
- Open-drain active-low interrupt output to indicate input state changes
- Power-on reset feature to initialize registers and I2C/SMBus state machine
Applications
The PCA9535HFHP is versatile and can be used in various applications, including:
- Industrial automation and control systems
- Automotive systems for expanding I/O capabilities
- Consumer electronics for enhancing microcontroller functionality
- Medical devices requiring low power and reliable I/O expansion
Q & A
- What is the PCA9535HFHP used for? The PCA9535HFHP is used as an I2C-bus and SMBus I/O expander to provide additional I/O ports for microcontrollers and other ICs.
- What is the package type of the PCA9535HFHP? The package type is HWQFN24, a plastic thermal enhanced very very thin quad flat package with 24 terminals and a 0.5 mm pitch.
- What is the power supply voltage range for the PCA9535HFHP? The power supply voltage range is from 1.65 V to 5.5 V.
- What is the standby current consumption of the PCA9535HFHP? The standby current consumption is 1 μA Max.
- Can the I/Os be configured as inputs or outputs? Yes, the I/Os can be configured as either inputs or outputs by writing to the I/O configuration bits.
- What is the purpose of the interrupt output on the PCA9535HFHP? The open-drain active-low interrupt output is used to indicate to the system master that an input state has changed.
- How does the power-on reset feature work? The power-on reset feature initializes the registers and I2C/SMBus state machine when power is applied and VCC reaches the power-on reset voltage.
- What are some common applications of the PCA9535HFHP? Common applications include industrial automation, automotive systems, consumer electronics, and medical devices.
- What is the operating temperature range of the PCA9535HFHP? The operating temperature range is from -40°C to 85°C.
- Can the polarity of the input port be inverted? Yes, the polarity of the Input Port register can be inverted using the Polarity Inversion register.
