Overview
The PCA9505DGGY, produced by NXP USA Inc., is a 40-bit I2C-bus I/O port expander designed for various applications requiring extensive I/O expansion. This device is part of the PCA9505/PCA9506 series, which provides a flexible and efficient way to expand the I/O capabilities of a system. The PCA9505DGGY is particularly useful in scenarios where multiple I/O lines need to be controlled or monitored through an I2C interface.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VDD) | 2.3 to 5.5 | V |
| I2C Bus Speed | Standard mode (100 kHz), Fast mode (400 kHz) | |
| Number of I/O Pins | 40 | |
| I/O Configuration | Configurable as input or output | |
| Output Current Capability | 10 mA source, 15 mA sink | |
| Package Type | 56-pin TSSOP | |
| Operating Temperature Range | -40°C to +85°C | |
| Standby Current | < 1 μA (typical) | |
| Internal Pull-up Resistors | 100 kΩ on all I/Os |
Key Features
- Standard mode (100 kHz) and Fast mode (400 kHz) compatible I2C-bus serial interface
- 2.3 V to 5.5 V operation with 5.5 V tolerant I/Os
- 40 configurable I/O pins that default to inputs at power-up
- Includes 100 kΩ internal pull-up resistors on all the I/Os
- Outputs are totem-pole, capable of sourcing 10 mA and sinking 15 mA
- Open-drain interrupt (INT) output pin for monitoring input pins
- Output Enable (OE) pin for 3-stating any I/O selected as an output
- Internal Power-On Reset (POR) or hardware reset (RESET) pin
- Three address select pins for configuring one of 8 target addresses
Applications
The PCA9505DGGY is suitable for a variety of applications, including:
- Industrial control systems requiring extensive I/O expansion
- Automotive systems where multiple I/O lines need to be controlled or monitored
- Consumer electronics such as smart home devices and appliances
- Medical devices that require precise I/O control and monitoring
- Any system needing to expand its I/O capabilities through an I2C interface
Q & A
- What is the PCA9505DGGY used for?
The PCA9505DGGY is used for expanding the I/O capabilities of a system through an I2C interface. - What is the operating voltage range of the PCA9505DGGY?
The operating voltage range is 2.3 V to 5.5 V. - How many I/O pins does the PCA9505DGGY have?
The device has 40 configurable I/O pins. - What type of I2C bus speeds does the PCA9505DGGY support?
It supports Standard mode (100 kHz) and Fast mode (400 kHz). - Does the PCA9505DGGY include internal pull-up resistors?
Yes, it includes 100 kΩ internal pull-up resistors on all the I/Os. - What is the maximum output current capability of the PCA9505DGGY?
The outputs can source 10 mA and sink 15 mA. - What is the package type of the PCA9505DGGY?
The package type is 56-pin TSSOP. - What is the operating temperature range of the PCA9505DGGY?
The operating temperature range is -40°C to +85°C. - How does the PCA9505DGGY handle interrupts?
The device has an open-drain interrupt (INT) output pin that is asserted when a change occurs in one or several input ports. - Can the PCA9505DGGY be reset?
Yes, it has an internal Power-On Reset (POR) or hardware reset (RESET) pin.
