Overview
The PCA9555DGVR, produced by Texas Instruments, is a low-voltage 16-bit I²C-bus I/O port expander designed for general-purpose remote I/O expansion. It operates within a voltage range of 2.3 V to 5.5 V, making it compatible with a wide range of microcontrollers and microprocessors. This device is particularly useful in applications where additional I/Os are needed without increasing the interconnections, thus simplifying system design.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage Range | 2.3 V to 5.5 V | V |
| Standby Current Consumption | 1 μA (max) | μA |
| I/O Configuration | 16-bit, configurable as inputs or outputs | |
| Interrupt Output | Open-drain active-low | |
| I²C Bus Speed | Up to 400 kHz | kHz |
| Address Pins | A0, A1, A2 (allowing up to 8 devices on the same bus) | |
| Package Options | SSOP (24), TVSOP (24), SOIC (24), VQFN (24) | |
| Operating Temperature Range | -40°C to 85°C | °C |
Key Features
- I²C-bus to parallel port expander
- Ultra-low standby current consumption of 1 μA (max)
- Schmitt-trigger action on SCL and SDA inputs for better noise immunity
- Noise filter on SCL and SDA inputs
- 5 V tolerant I/Os
- Weak pull-up resistors on I/O pins
- Open-drain active-low interrupt output
- Configurable input/output polarity inversion
Applications
- Routers and telecom switching equipment
- Personal computers and personal electronics
- Industrial automation equipment
- Products with GPIO-limited processors
- ACPI power switches, sensors, push buttons, LEDs, fan control, etc.
Q & A
- What is the operating voltage range of the PCA9555DGVR?
The PCA9555DGVR operates within a voltage range of 2.3 V to 5.5 V. - What is the standby current consumption of the PCA9555DGVR?
The standby current consumption is 1 μA (max). - How many I/O pins does the PCA9555DGVR have?
The PCA9555DGVR has 16 I/O pins. - What type of interrupt output does the PCA9555DGVR have?
The PCA9555DGVR has an open-drain active-low interrupt output. - What is the maximum I²C bus speed supported by the PCA9555DGVR?
The PCA9555DGVR supports up to 400 kHz I²C bus speed. - How many devices can share the same I²C bus using the PCA9555DGVR?
Up to 8 devices can share the same I²C bus using the address pins A0, A1, and A2. - What are the package options available for the PCA9555DGVR?
The package options include SSOP (24), TVSOP (24), SOIC (24), and VQFN (24). - What is the operating temperature range of the PCA9555DGVR?
The operating temperature range is -40°C to 85°C. - What type of action is used on the SCL and SDA inputs for noise immunity?
Schmitt-trigger action is used on the SCL and SDA inputs for better noise immunity. - Are the I/O pins 5 V tolerant?
Yes, the I/O pins are 5 V tolerant.
