MICRF302

Parallel Encoder

QwikRadio is a registered trademark of Micrel, Inc.

MLF and MicroLead Frame are registered trademark of Amkor Technology

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

October 2008

M9999-100908-A

General Description

The MICRF302 is a parallel encoder which works with

QwikRadio

time for RF products. The part is easy to use, provides

more communication distance, and it is extremely stable

over operating temperature and operating voltage range.

The MICRF302 Parallel Encoder makes the transmission

of encoding data simple. This device encodes data from

four input pins, which have internal pull-up resistors and

deglitching circuitry. These inputs can be connected to

switches or external circuitry.

The MICRF302 outputs

encoded data serially, and can be connected directly to

any

QwikRadio

®

transmitter

without

any

additional

components.

The MICRF302 gives communication reliability through

built-in CRC (cyclic redundancy check). The MICRF302

needs no external components for clock generation.

Unlike other encoders on the market, there is no shift in

performance

with

associated

changes

in

operating

temperature nor operating voltage. The internal clock

provides stable data operations over a wide temperature

range of -40°C to +85°C.

MICRF302 can operate from

1.8 V to 3.6 V. The MICRF302 is battery friendly, and will

work with alkaline, NiCd, NiMh, lithium ion, or lithium

batteries.

Features

• Wide operating voltage range: 1.8 V to 3.6 V

• Low current consumption: 130µA operating, 0.1µA

Standby

• On-chip clock generation requires no external

components

• Unique 20-bit internal address allows up to 1 million

combinations to differentiate from adjacent encoders.

• Selectable data rates: 0.6, 1, 3, 4.8kbps

• 8-bit industry-standard CRC provides robust data

protection

• On-chip pullup resistors

• On-chip deglitch makes it easy to use low-cost switches

Applications

• Light switches

• Appliance controls

• Christmas lights

• Fan and HVAC switches

• Remote half switches

• Garage door openers

• Remote controls

• Toys

• Lawn watering sensors

• Robust, unidirectional, low cost, low power, low data

rate communications links

_________________________________________________________________________________________________

Ordering Information

Part Number

Marking Code

Temperature Range

Package

MICRF302YML

XA02

-40ºC to +85ºC

10-pin 2.5mm × 2.5mm MLF

®

Note:

1. MLF is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.