Overview
The PCA9502BS,157 is an 8-bit I/O expander produced by NXP USA Inc., designed with both I2C-bus and SPI host interfaces. This device is particularly suited for hand-held and battery-operated applications due to its compact HVQFN24 package. It offers the flexibility of operating at either 3.3 V or 2.5 V and supports a wide industrial temperature range of -40°C to +85°C. The PCA9502 also features a software reset capability, allowing the host to reset the device independently of the hardware reset signal.
Key Specifications
| Parameter | Description |
|---|---|
| Interface | Selectable I2C-bus or SPI |
| Operating Voltage | 3.3 V or 2.5 V |
| Temperature Range | -40°C to +85°C |
| I/O Pins | Eight programmable I/O pins |
| Package | HVQFN24 |
| I2C-bus Speed | Up to 400 kbit/s (Fast-mode) |
| SPI Speed | Up to 15 Mbit/s |
| Slave Addresses | 16 hardware-selectable slave addresses |
Key Features
- Selectable I2C-bus or SPI interface
- Software reset capability
- Eight programmable I/O pins
- Noise filter on SCL/SDA inputs for I2C-bus
- Compliant with I2C-bus Fast-mode and SPI Mode 0
- Industrial and commercial temperature ranges
- 16 hardware-selectable slave addresses
Applications
- Factory automation and process control
- Portable and battery-operated devices
- Cellular data devices
Q & A
- What interfaces does the PCA9502 support?
The PCA9502 supports both I2C-bus and SPI interfaces.
- What are the operating voltage options for the PCA9502?
The PCA9502 can operate at either 3.3 V or 2.5 V.
- What is the temperature range of the PCA9502?
The PCA9502 operates within a temperature range of -40°C to +85°C.
- How many programmable I/O pins does the PCA9502 have?
The PCA9502 has eight programmable I/O pins.
- What package type is the PCA9502 available in?
The PCA9502 is available in the HVQFN24 package.
- What is the maximum speed of the I2C-bus interface on the PCA9502?
The maximum speed of the I2C-bus interface is 400 kbit/s (Fast-mode).
- What is the maximum speed of the SPI interface on the PCA9502?
The maximum speed of the SPI interface is 15 Mbit/s.
- Does the PCA9502 support software reset?
Yes, the PCA9502 supports software reset, allowing the host to reset the device independently of the hardware reset signal.
- How many hardware-selectable slave addresses does the PCA9502 have?
The PCA9502 has 16 hardware-selectable slave addresses.
- What are some common applications of the PCA9502?
The PCA9502 is commonly used in factory automation, portable and battery-operated devices, and cellular data devices.
