MAX11041_08 Datasheet, PDF (1/17 Pages) Maxim Integrated Products – Wired Remote Controllers

19-3984; Rev 2; 11/08
Wired Remote Controllers
General Description
The MAX11041/MAX11042 wired remote controllers
convert up to six or 30 different pushbuttons into an I²C
register. Together with low-cost pushbutton switches
and 1% resistors, the MAX11041/MAX11042 are total
solutions 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/MAX11042
consume only 5µA (typ) while reading keypresses in
real time without microprocessor (µP) polling. The
devices send the debounced keypress along with key
duration to the application processor over the I²C inter-
face. An 8-word FIFO buffer records up to four key-
press events to allow plenty of time for the application
processor to respond to the MAX11041/MAX11042.
The MAX11041/MAX11042 include ±15kV ESD protec-
tion devices on the FORCE and SENSE inputs to ensure
IEC 61000-4-2 compliance without any external
ESD devices.
The MAX11041/MAX11042 are available in a 12-pin
TQFN package. The devices are specified over the
extended temperature range (-40°C to +85°C).
Applications
Features
♦ Detect Up to Six (MAX11042) or 30 (MAX11041)
Different Keys and Jack Insertion/Removal
♦ Work with Either 32Ω or 16Ω Headphones
♦ Add Remote-Control Functionality to Devices
Using a Simple Resistor and Switch Array
♦ Low-Power Operation Consuming a Supply
Current of Only 5µA (typ)
♦ Work with Standard 2.5mm or 3.5mm 4-Pin
Headphone Jacks
♦ Support 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)
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX11041ETC+
-40°C to +85°C
12 TQFN-EP*
MAX11042ETC+** -40°C to +85°C
12 TQFN-EP*
*EP = Exposed pad.
**Future product—contact factory for availability.
+Denotes a lead-free/RoHs-compliant package.
Multimedia Controls for
Multimedia-Enabled
Cell Phones
Keyboard Encoder for
Slider, Flip, and other
Cell Phones
Portable Media Players
MP3, CD, DVD Players
PDAs
Digital Still Cameras
PDA Accessory
Keyboards
Multimedia Desktop
Speakers
Portable Game
Consoles
Pin Configuration
TOP VIEW
9
8
7
INT 10
6 A0
V_DD 11
FORCE 12 ₊
MAX11041
MAX11042
1
2
3
5 A1
4 N.C.
THIN QFN
(4mm x 4mm x 0.6mm)
EXPOSED PAD CONNECTED TO GND.
________________________________________________________________ Maxim Integrated Products 1
For pricing delivery, and ordering information please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.