PCA9674BS,118

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Introduction

PCA9674BS,118 is a high-performance, low-power, small-in-package I/O expander designed to interface microprocessors to general-purpose I/O lines. It is suitable to use in a wide range of industrial, consumer and automotive applications. The PCA9674BS,118 can extend the I/O capability up to 118, which could save system design power and cost. This device features various features such as I2C port, 16-bit parallel interface, PWM output and wake-up/reset pins.

Features

The PCA9674BS,118 operates within a single 3.3V power supply. With the combination of the I2C interface and the 16-bit parallel interface, it enables direct connection with the microcontroller. Over 106 general I/O pins and an additional 4 for GPIO can expand a system to 118 I/O pins. Furthermore, the strong support in software allows developers to implement a complete I/O expander quickly and easily. It supports 32 channels of PWM outputs, programmable via I2C. In addition, the wake-up and reset inputs enable the device to reset itself and wake up the main system quickly without a power cycle.

Application Field

As a high-performance I/O expander, PCA9674BS,118 is suitable for a wider range of applications. The most commonly used domain is industrial automation, in which the PCA9674BS,118 can communicate with the microcontroller through I2C and replace the direct connection with the microcontroller, thus greatly reducing the number of pins on the microcontroller. In addition, the PCA9674BS,118 features low power consumption and strong programmability, making it well-suited for battery operated products, such as remote controllers and portable devices. PCA9674BS,118 can also be applied in automotive technology. The I2C interface is tailored for connecting to the vehicle\'s main microcontroller and is used for a range of functions, from control and remote monitoring to prevention from damage.

Working Principle

PCA9674BS,118 allows microcontrollers to control and monitor up to 118 external I/O channels. The well-defined system architecture supports two types of connections, one is 16-bit parallel interface, the other is single I2C interface. The PCA9674BS,118 provides an I2C slave interface for setting up and controlling the PWM outputs, GPIO lines and wake-up/reset inputs. For the parallel I/O pins, the data flow can be selected as either unidirectional from the host to the device or bi-directional mode. The data can be latched into the IO register when the latch enable input is active. The I2C interface supports 8-bit sub-addressing and supports 400kHz, 800kHz, 1MHz and 2MHz standard I2C bus speed.

Conclusion

PCA9674BS,118 is an ideal I/O expander that is suitable for a wide range of industrial, consumer and automotive applications. It is easy to implement and cost-effective. The I2C interface allows users to configure and control the device via microprocessors, while the 16-bit parallel interface enables direct connection with the microcontroller. Thanks to its features including low power consumption, reset and wake-up lines and PWM control, it helps improve system performance and reduce power consumption. All in all, the PCA9674BS,118 is a great choice when it comes to expanding I/O capability and reducing cost.

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