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4-Channel I²C Switches/Multiplexer

Product Details

Key Features

Simplified Block Diagram

Technical Docs

Data Sheet 4-Channel I²C Switches/Multiplexer Mar 13, 2009

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Key Features

  • Four-Channel, Bidirectional Bus Expansion
  • Voltage-Level Translation
  • Low 6µA (typ) Supply Current, 0.1µA (typ) Standby Current
  • Low 16Ω (typ) On-Resistance
  • Channel Selection Through I²C
  • I²C-Compatible Normal or Fast Mode
  • Device Address Selection
    • Up to Four Addresses (MAX7367)
    • Up to Eight Addresses (MAX7368/MAX7369)
  • Bus-Loading Isolation
  • Support Clock Stretch, Synchronization, and Arbitration
  • Hot Insertion
  • 2.3V to 5.5V Supply Voltage Range
  • 5V-Tolerant Inputs
  • Interrupt from Extended Buses (MAX7367/MAX7369)
  • Hardware Reset (MAX7367/MAX7368)

Applications/Uses

  • Base Stations
  • Cellular Phones
  • Multimedia Electronics
  • PCs
  • RAID
  • SAN/NAS
  • Servers

Description

The MAX7367/MAX7368/MAX7369 bidirectional, four-channel I²C switches/multiplexer expand the main I²C bus up to four extended buses. The MAX7369 1:4 multiplexer connects the main I²C bus to one channel at a time. The MAX7367/MAX7368 four-channel switches connect the main I²C bus to one or more channels at a time.

These devices isolate bus loading by extending the I²C bus onto different channels. The MAX7367/MAX7368/MAX7369 allow more devices to be interconnected to a master controller and multiple devices with the same I²C address to communicate to a master. The channels are selected through the main I²C bus by writing to the internal control register of the device.

Any device connected to an I²C bus can transmit and receive signals. The MAX7367/MAX7368/MAX7369 are transparent to signals sent and received at each channel, allowing multiple masters. These devices are compatible with the I²C protocol of clock stretch, synchronization, and arbitration in case multiple masters address the bus at the same time.

All devices are set to the default state during initial power-up. The MAX7367/MAX7368 have an active-low RESET input allowing external circuitry to set the MAX7367/MAX7368 to its default state anytime after the device has powered up. The MAX7367/MAX7369 have interrupt inputs, allowing devices on the extended bus to send an interrupt signal to the master on the main bus.

The MAX7367/MAX7369 are available in 20-pin TSSOP packages, and the MAX7368 is available in a 16-pin TSSOP package. All devices operate over the -40°C to +85°C extended temperature range.

Simplified Block Diagram

MAX7367, MAX7368, MAX7369: Typical Operating Circuit MAX7367, MAX7368, MAX7369: Typical Operating Circuit Zoom icon

Technical Docs

Data Sheet 4-Channel I²C Switches/Multiplexer Mar 13, 2009

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .