General Description

The MAX11041/MAX11042 wired remote controllers

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

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 12-bump

UCSP™ and 12-pin TQFN packages. 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

♦ Single 1.6V to 3.6V Supply Voltage Range

♦ ±15kV ESD Protection (IEC 61000-4-2)

Wired Remote Controllers

________________________________________________________________ Maxim Integrated Products

1

19-3984; Rev 1; 8/07

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.

12

11

10

4

5

6

12

3

98

7

FORCE

A0

A1

N.C.

MAX11041

MAX11042

INT

THIN QFN

(4mm x 4mm x 0.6mm)

TOP VIEW

EXPOSED PAD CONNECTED TO GND.

Pin Configurations

Ordering Information

UCSP is a trademark of Maxim Integrated Products, Inc.

*EP = Exposed pad.

**Future product—contact factory for availability.

Pin Configurations continued at end of data sheet.

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

PART

TEMP

RANGE

PIN-

PACKAGE

PKG

CODE

MAX11041ETC+

-40°C to +85°C 12 TQFN-EP*

T1244-4

MAX11042ETC+**

-40°C to +85°C 12 TQFN-EP*

T1244-4