Overview
The PCA9534PWR, produced by Texas Instruments, is an 8-bit I2C and SMBus low-power I/O expander. This component is designed to provide general-purpose remote I/O expansion for most microcontroller families via the I2C interface. It operates within a power-supply voltage range of 2.3 V to 5.5 V, making it versatile for various applications. The PCA9534PWR is notable for its low standby current consumption, high-current drive capability, and robust ESD protection, making it a reliable choice for a wide range of electronic systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 2.3 to 5.5 | V |
| Standby Current Consumption | 1 | μA |
| I2C Bus Speed | 400 kHz | |
| Number of GPIOs | 8 | |
| Operating Temperature Range | -40 to 85 | °C |
| Package Type | TSSOP (PW) | |
| Number of Pins | 16 | |
| ESD Protection | 2000-V Human-body model, 200-V Machine model, 1000-V Charged-device Model |
Key Features
- Low standby current consumption of 1 μA Max
- I2C to Parallel port expander
- Open-drain active-low interrupt output
- 5-V Tolerant I/O ports
- 400-kHz Fast I2C bus
- Three hardware address pins allowing up to eight devices on the I2C/SMBus
- Allows up to 16 devices on the I2C/SMBus when used in conjunction with the PCA9534A
- Input/output configuration register and polarity inversion register
- Internal power-on reset and power-up with all channels configured as inputs
- No glitch on power up and noise filter on SCL/SDA inputs
- Latched outputs with high-current drive capability for directly driving LEDs
- Robust ESD protection exceeding JESD 22 standards
Applications
The PCA9534PWR is suitable for a variety of applications requiring remote I/O expansion, such as:
- Industrial automation systems
- Consumer electronics
- Medical devices
- Automotive systems
- Smart home devices
Its low power consumption and high reliability make it an ideal choice for battery-powered devices and systems requiring minimal power usage.
Q & A
- What is the operating voltage range of the PCA9534PWR?
The PCA9534PWR operates within a power-supply voltage range of 2.3 V to 5.5 V.
- What is the standby current consumption of the PCA9534PWR?
The standby current consumption is 1 μA Max.
- What is the speed of the I2C bus supported by the PCA9534PWR?
The PCA9534PWR supports a 400-kHz Fast I2C bus.
- How many GPIOs does the PCA9534PWR provide?
The PCA9534PWR provides 8 GPIOs.
- What is the package type and number of pins for the PCA9534PWR?
The PCA9534PWR comes in a TSSOP (PW) package with 16 pins.
- What kind of ESD protection does the PCA9534PWR offer?
The PCA9534PWR offers robust ESD protection exceeding JESD 22 standards, including 2000-V Human-body model, 200-V Machine model, and 1000-V Charged-device Model.
- Can multiple PCA9534PWR devices be connected on the same I2C bus?
Yes, up to eight PCA9534PWR devices can be connected on the same I2C bus using the three hardware address pins. When used in conjunction with the PCA9534A, up to 16 devices can be connected.
- What is the purpose of the interrupt output on the PCA9534PWR?
The interrupt output allows the remote I/O to inform the microcontroller of incoming data on its ports without needing to communicate via the I2C bus.
- Does the PCA9534PWR have any noise filtering capabilities?
Yes, the PCA9534PWR includes noise filters on the SCL/SDA inputs.
- Can the PCA9534PWR directly drive LEDs?
Yes, the PCA9534PWR has latched outputs with high-current drive capability for directly driving LEDs.
