Overview
The PCF8574ADWRG4 is an I/O expander integrated circuit (IC) manufactured by Texas Instruments. This product is designed to provide remote I/O expansion for most microcontroller families via the I²C-bus interface. It is particularly useful in applications where additional I/O ports are required without increasing the microcontroller's pin count. The PCF8574ADWRG4 is targeted at designers and engineers working on industrial control systems, consumer electronics, and embedded systems, offering a cost-effective and space-saving solution for I/O expansion. Its unique selling points include its simplicity of integration, low power consumption, and compatibility with a wide range of microcontrollers.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Supply Voltage | 2.5 to 6 | V | |
| Operating Temperature | -40 to 85 | °C | |
| I/O Ports | 8 | Quasi-bidirectional | |
| I²C-bus Interface | Yes | Up to 100 kHz | |
| Package | SOIC | 16-pin | |
| Power Consumption | Low | Typical standby current 2.5 µA |
Key Features
- Simple I²C-bus interface allows for easy integration with microcontrollers.
- Eight quasi-bidirectional I/O ports that can be independently configured.
- Low standby current consumption enhances energy efficiency.
- Wide operating voltage range supports compatibility with various logic levels.
- Latch-up performance exceeds 100 mA per JESD 78, Class II.
Applications
The PCF8574ADWRG4 is widely used in various applications including industrial automation, where it facilitates the control and monitoring of machinery and processes. In consumer electronics, it is employed in devices requiring additional I/O ports for user interfaces or sensor integration. Additionally, it finds utility in automotive electronics for vehicle control systems and in embedded systems for expanding the capabilities of microcontrollers without the need for additional components.
Q & A
What is the maximum I²C-bus frequency supported by the PCF8574ADWRG4?
The PCF8574ADWRG4 supports I²C-bus frequencies up to 100 kHz.
Can the I/O ports be configured as inputs and outputs?
Yes, the I/O ports are quasi-bidirectional and can be configured as either inputs or outputs.
What is the operating voltage range of the PCF8574ADWRG4?
The operating voltage range is from 2.5V to 6V.
Is the PCF8574ADWRG4 suitable for automotive applications?
Yes, it can be used in automotive electronics, provided it is within the specified operating conditions.
How many I/O ports does the PCF8574ADWRG4 have?
It has 8 quasi-bidirectional I/O ports.
What is the package type of the PCF8574ADWRG4?
It comes in a 16-pin SOIC package.
Does the PCF8574ADWRG4 have low power consumption?
Yes, it features low power consumption with a typical standby current of 2.5 µA.
Can the PCF8574ADWRG4 operate in extreme temperatures?
Yes, it can operate in temperatures ranging from -40°C to 85°C.
Is the PCF8574ADWRG4 compatible with 3.3V microcontrollers?
Yes, it is compatible with 3.3V microcontrollers as it operates within a 2.5V to 6V range.
What is the latch-up performance of the PCF8574ADWRG4?
The latch-up performance exceeds 100 mA per JESD 78, Class II.
