PCA9547 8-Channel I2C-Bus Multiplexer with Reset with I2C Interface

PCA9547 8-Channel I2C-Bus Multiplexer with Reset with I2C Interface
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  • NCD-PR12-17
  • PR12-17
This I2C Multiplexer is an ideal solution for speaking to our entire range of Mini Modules and... more
Product information "PCA9547 8-Channel I2C-Bus Multiplexer with Reset with I2C Interface"

This I2C Multiplexer is an ideal solution for speaking to our entire range of Mini Modules and I2C devices, effectively converting a single I2C port into 8 I2C ports.  On-board high-power driver is capable of delivering up to 5 Amps of current to be shared across all 8 I2C ports.  This device offers enough current drive several of our spotlight I2C mini modules with no problem.  Gas sensors also require a tremendous amount of current, making this a necessary add-on for many applications.

The PCA9547 is an octal bidirectional translation multiplexer controlled by the I2C-bus.  The SCL/SDA upstream pair fans out to eight downstream pairs, or channels. The device powers up with Channel 0 connected, allowing immediate communication between the master and downstream devices on that channel. An active LOW reset input allows the PCA9547 to recover from a situation where one of the downstream I2C-buses is stuck in a LOW state.

What is the NCD I2C Interface?

NCD is the creator of plug and play modular hardware using the NCD I2C Interface connector standard.  NCD I2C devices allow you to chain together several devices on the I2C bus, and communicate to each device individually at high speed (subject to the limitations of I2C).  The NCD I2C Interface uses a standard 4-Pin I2C Input and I2C Output connector.  NCD I2C devices communicate 5V I2C data and provides 5V DC power through this connector.  NCD I2C devices use standard I2C communications for all data transport, which is supported by nearly every microcontroller in production today.  The NCD I2C Interface is strictly a 5V standard, which is ideal for transport across longer cables.  NCD I2C devices always include a 6″ (152mm) 4-conductor I2C cable.  NCD I2C Mini Modules always include a 3″ (76mm) 4-conductor I2C cable.  Cables and connectors are available separately for designers who would like to include their own NCD I2C Interface into their designs.

Plug and Play Connectivity

NCD I2C devices will plug in to any available NCD I2C Output.  This includes just about everything we make in the NCD IoT Category, including all NCD IoT devices.  We also manufacture a wide range of I2C adapters that make it easy to plug NCD I2C Devices directly into most computing platforms.  The NCD I2C Interface adapters are available for Arduino, Banana Pi, BeagleBone, Bluz, C.H.I.P., ESP8266, Onion Omega, Particle Photon and Electron, PyCom, Raspberry Pi, 2, 3, and Zero, and Windows.  We are always working to add new platform support for NCD I2C devices.  NCD I2C Interface devices are compatible with just about everything in the microcontroller industry.

Unlimited I2C Expansion

Based on our plug-and-play I2C interface standard, all NCD I2C devices are equipped with a I2C output port, making it easy to expand to a wide variety of sensors, current monitors, relay controllers, PWM controllers, and much more!  We are always designing new expansions for our modular plug-and-play I2C framework.  We are dedicated to building a product line of interconnected devices to simplify all forms of automation.  Re-use or upgrade your hardware in seconds by selecting the modules that best fit your needs, and chaining them together using the included I2C expansion cables!

Powering NCD I2C Interface Devices

Some NCD I2C devices require a external power supply, others may be powered through the 4-Pin I2C bus connector at 5VDC, and other devices are jumper selectable between external and I2C bus power.  All I2C mini modules are powered through the 5V I2C bus connector, greatly simplifying connectivity.

Features

  • I2C 8 Channel Multiplexer
  • 3 Address Pins Allowing Up to 8 Devices on the I2C Bus
  • No Glitch on Power Up
  • 0 Hz to 400 kHz Clock Frequency
  • High Power I2C Multiplexer Max Current up to 6 Amp
  • 0x70 I2C Start Address
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