Overview
The PCA9535PWR, produced by Texas Instruments, is a remote 16-bit I2C and SMBus low-power I/O expander. This integrated circuit is designed to expand the I/O capabilities of a microcontroller or other I2C/SMBus master device. It features a low standby current consumption, making it suitable for power-sensitive applications. The device includes configuration registers, input and output ports, and an interrupt output, allowing for flexible and efficient I/O management.
Key Specifications
| Parameter | Value | Description |
|---|---|---|
| Number of I/O | 16 | Total number of input/output pins |
| Interface | I2C, SMBus | Communication interfaces supported |
| Clock Frequency | 400 kHz | Maximum clock frequency for I2C/SMBus operations |
| Supply Voltage | 2.3 V to 5.5 V | Operating voltage range |
| Operating Temperature | -40°C to +85°C | Temperature range for operation |
| Package/Case | 24-TSSOP | Package type and pin count |
| Output Type | PUSH-PULL | Type of output configuration |
| Output Current | 10 mA, 25 mA | Source and sink current capabilities |
| Interrupt Output | Yes | Presence of an interrupt output |
| Power-On Reset | Yes | Presence of a power-on reset feature |
Key Features
- Low Power Consumption: The PCA9535PWR has a low standby current consumption of 1 μA max, making it suitable for power-sensitive applications.
- I2C and SMBus Interface: Supports both I2C and SMBus communication protocols with a clock frequency up to 400 kHz.
- Interrupt Output: Features an open-drain active-low interrupt output that is activated when any input state differs from its corresponding Input Port register state.
- Configuration Registers: Includes configuration, input port, output port, and polarity inversion registers for flexible I/O management.
- Power-On Reset: The device has a power-on reset feature that initializes the registers and I2C/SMBus state machine to their default states upon power-up.
- Addressing Capability: Allows up to eight devices to share the same I2C bus or SMBus using three hardware pins (A0, A1, and A2) for address programming).
Applications
- Industrial Automation: Suitable for expanding I/O capabilities in industrial control systems and automation equipment.
- Consumer Electronics: Used in various consumer electronics to manage and expand I/O functions efficiently.
- Medical Devices: Can be used in medical devices where low power consumption and reliable I/O expansion are critical.
- Automotive Systems: Applicable in automotive systems for I/O expansion and management within the vehicle's electronic control units.
- Embedded Systems: Ideal for embedded systems requiring additional I/O ports with low power consumption.
Q & A
- What is the PCA9535PWR used for?
The PCA9535PWR is used to expand the I/O capabilities of a microcontroller or other I2C/SMBus master device.
- What communication protocols does the PCA9535PWR support?
The PCA9535PWR supports both I2C and SMBus communication protocols.
- What is the maximum clock frequency for the PCA9535PWR?
The maximum clock frequency is 400 kHz.
- What is the operating voltage range for the PCA9535PWR?
The operating voltage range is from 2.3 V to 5.5 V.
- Does the PCA9535PWR have an interrupt output?
Yes, it features an open-drain active-low interrupt output.
- How many devices can share the same I2C bus or SMBus?
Up to eight devices can share the same I2C bus or SMBus using the address programming pins (A0, A1, and A2).
- What is the power consumption of the PCA9535PWR in standby mode?
The standby current consumption is 1 μA max.
- What type of package does the PCA9535PWR come in?
The PCA9535PWR comes in a 24-TSSOP package.
- Does the PCA9535PWR have a power-on reset feature?
Yes, it has a power-on reset feature that initializes the registers and I2C/SMBus state machine to their default states upon power-up.
- What is the operating temperature range for the PCA9535PWR?
The operating temperature range is from -40°C to +85°C.
