Wired Remote Controller

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The MAX11041 wired remote controller converts up to 30 different pushbuttons into an I²C register. Together with low-cost pushbutton switches and 1% resistors, the MAX11041 is a total solution over a single-wire interface. A wired remote controller easily piggybacks to a standard 3.5mm headphone jack using a fourth contact or one of the audio signals.

To conserve battery life, the MAX11041 consumes only 5µA (typ) while reading keypresses in real time without microprocessor (µP) polling. The device sends the debounced keypress along with key duration to the application processor over the I²C interface. An 8-word FIFO buffer records up to four keypress events to allow plenty of time for the application processor to respond to the MAX11041.

The MAX11041 includes ±15kV ESD protection devices on the FORCE and SENSE inputs to ensure IEC 61000-4-2 compliance without any external ESD devices.

The MAX11041 is available in a 12-pin TQFN package. The device is specified over the extended temperature range (-40°C to +85°C).
MAX11041, MAX11042: Functional Diagram MAX11041, MAX11042: Functional Diagram Enlarge+

Key Features

  • Detect Up to 30 Different Keys and Jack Insertion/Removal
  • Works with Either 32Ω or 16Ω Headphones
  • Adds Remote-Control Functionality to Devices Using a Simple Resistor and Switch Array
  • Low-Power Operation Consuming a Supply Current of Only 5µA (typ)
  • Works with Standard 2.5mm or 3.5mm 4-Pin Headphone Jacks
  • Supports Hold Function to Lockout Keys
  • 100kHz/400kHz I²C Interface
  • Single 1.6V to 3.6V Supply Voltage Range
  • ±15kV ESD Protection (IEC 61000-4-2)


  • Digital Still Cameras
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  • MP3, CD, DVD Players
  • Multimedia Controls for Multimedia-Enabled Cell Phones
  • Multimedia Desktop Speakers
  • PDA Accessory Keyboards
  • PDAs
  • Portable Game Consoles
  • Portable Media Players
Part NumberInterfaceKeysI2C I/F Volt.ISUPPLY
Interr. OutKey Scan I2C Slave IDsVSUPPLY
maxtyptypSee Notes
MAX11041 I2C 100kbit/400kbit301.6 to 3.651Yes41.6 to 3.6
$1.65 @1k
See All Keyswitch Controllers (4)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Quality and Environmental Data

Request Reliability Report for: MAX11041 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX11041ETC
  • MAX11041ETC+
  • MAX11041ETC+T
  • MAX11041ETC-T
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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