Rainbow Electronics MAX11042 - Manual

General Description
The MAX11041/MAX11042 wired remote controllers
convert up to six or 30 different pushbuttons into an
I
2 C* register. Together with low-cost pushbutton switch-
es 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 I
2 C 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 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
♦ 100kHz/400kHz I
2 C Interface
♦ Single 1.6V to 3.6V Supply Voltage Range
♦ ±15kV ESD Protection (IEC 61000-4-2)
MAX11041/MAX11042
Wired Remote Controllers
________________________________________________________________ Maxim Integrated Products 1
19-3984; Rev 0; 1/06
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
12
11
10
4
5
SENSE
V
DD
6
GND
SCL SHDN SDA
1 2
V DD
3
9 8 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.
*Purchase of I 2 C components from Maxim Integrated Products,
Inc., or one of its sublicensed Associated Companies, conveys
a license under the Philips I
2 C Patent Rights to use these com-
ponents in an I 2 C system, provided that the system conforms
to the I 2 C Standard Specification as defined by Philips.
*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
M AX 11041E BC - T** -40°C to +85°C
12 UCSP
(4 x 4 Array)
B16-5
MAX11042ETC** -40°C to +85°C 12 TQFN-EP* T1244-4
M AX 11042E BC - T** -40°C to +85°C
12 UCSP
(4 x 4 Array)
B16-5