PCA9552BS
16-bit I2C LED drivers with blinker functionality in compact HVQFN packages
Manufacturer： nxp
series introduction
# PCA9552BS Product Series Introduction
## 1. Overview
The PCA9552BS is a highly versatile and feature - rich product series offered by NXP Semiconductors. It belongs to the family of I2C - based general - purpose input/output (GPIO) expanders. These devices are designed to provide additional input and output capabilities to microcontrollers and other host devices, especially when the number of available GPIO pins on the main device is limited.
## 2. Key Features
### 2.1 I2C Interface
- **High - speed Communication**: The PCA9552BS uses the widely adopted I2C (Inter - Integrated Circuit) bus protocol. It supports a standard mode with a data transfer rate of up to 100 kbps and a fast mode with a rate of up to 400 kbps. This allows for efficient and reliable communication between the PCA9552BS and the host device, enabling quick data exchange and control.
- **Addressing Flexibility**: It has a programmable I2C slave address. With three address pins (A0, A1, A2), up to 8 different devices can be connected to the same I2C bus, providing a simple and effective way to expand the number of GPIO ports in a system.
### 2.2 GPIO Configuration
- **16 - bit GPIO Expansion**: Each PCA9552BS device offers 16 general - purpose input/output pins. These pins can be individually configured as either inputs or outputs, providing great flexibility in system design. For example, in a home automation system, some pins can be used to read the status of sensors (input mode), while others can be used to control relays or LEDs (output mode).
- **Polarity Inversion**: The device supports polarity inversion for input pins. This feature is useful when dealing with sensors or other devices that output signals in an inverted logic level. By enabling polarity inversion, the host device can receive the signals in the desired logic state without the need for additional external circuitry.
### 2.3 Interrupt Functionality
- **Interrupt Output Pin**: The PCA9552BS is equipped with an interrupt output pin (INT). This pin can be configured to generate an interrupt signal to the host device when there is a change in the input state of any of the configured input pins. This feature is crucial in applications where real - time monitoring of input changes is required, such as in security systems or industrial control applications.
- **Interrupt Masking**: It also provides an interrupt masking function. This allows the user to selectively enable or disable the interrupt generation for specific input pins. For example, in a system where only a few input pins are critical for real - time monitoring, the user can mask the interrupts from the non - critical pins to reduce the interrupt load on the host device.
### 2.4 Power Management
- **Low - Power Operation**: The PCA9552BS is designed to operate with low power consumption. This makes it suitable for battery - powered applications, such as portable devices or wireless sensor nodes. In standby mode, the power consumption is further reduced, helping to extend the battery life of the system.
- **Wide Supply Voltage Range**: It can operate with a supply voltage ranging from 2.3 V to 5.5 V. This wide voltage range allows the device to be used in a variety of systems with different power supply requirements.
## 3. Applications
### 3.1 Consumer Electronics
- **Smart Home Devices**: In smart home systems, the PCA9552BS can be used to expand the GPIO capabilities of a microcontroller. It can be used to interface with various sensors such as door/window sensors, motion sensors, and temperature sensors. Additionally, it can control smart switches, LED lights
Images for reference
24-HVQFN,SOT616
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