Overview
The PCA9534ARGVR, produced by Texas Instruments, is an 8-bit I2C and SMBus low-power I/O expander designed for general-purpose remote I/O expansion. This device operates within a power-supply voltage range of 2.3 V to 5.5 V and is suitable for use with most microcontroller families via the I2C interface. It features low standby current consumption, making it an efficient choice for various applications. The PCA9534ARGVR is available in a 16-pin VQFN (RGV) package and is pin-to-pin and I2C address compatible with the PCF8574, although software changes may be required due to its enhanced features.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | VQFN (RGV) | - |
| Pins | 16 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Operating Power-Supply Voltage Range | 2.3 to 5.5 | V |
| I2C Bus Frequency | 400 kHz | - |
| Standby Current Consumption | 1 µA Max | - |
| Continuous Output Low Current | 50 mA | - |
| Continuous Output High Current | -50 mA | - |
| 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 (A0, A1, A2) allowing up to eight devices on the I2C/SMBus
- 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
- Latch-up performance exceeds 100 mA Per JESD 78, Class II
Applications
The PCA9534ARGVR is suitable for a variety of applications requiring remote I/O expansion, including:
- Industrial control systems
- Consumer electronics
- Automotive systems
- Medical devices
- Any system requiring additional I/O ports via an I2C interface
Q & A
- What is the operating voltage range of the PCA9534ARGVR?
The PCA9534ARGVR operates within a power-supply voltage range of 2.3 V to 5.5 V.
- What is the maximum standby current consumption of the PCA9534ARGVR?
The maximum standby current consumption is 1 µA.
- What is the I2C bus frequency supported by the PCA9534ARGVR?
The device supports a 400-kHz Fast I2C bus.
- How many devices can be connected on the same I2C/SMBus using the PCA9534ARGVR?
Up to eight devices can be connected on the same I2C/SMBus, and up to 16 devices when used in conjunction with the PCA9534A.
- What is the purpose of the interrupt output (INT) on the PCA9534ARGVR?
The interrupt output (INT) is used to inform the microcontroller if there is incoming data on its ports without having to communicate via the I2C bus.
- Does the PCA9534ARGVR have ESD protection?
- What is the package type and pin count of the PCA9534ARGVR?
The device is available in a 16-pin VQFN (RGV) package.
- Can the PCA9534ARGVR directly drive LEDs?
- Is the PCA9534ARGVR compatible with other I/O expanders?
The PCA9534ARGVR is pin-to-pin and I2C address compatible with the PCF8574, although software changes may be required.
- What is the difference between the PCA9534 and PCA9554?
The PCA9534 eliminates an internal I/O pullup resistor, which dramatically reduces power consumption in the standby mode when the I/Os are held low.
