micrf302yml Micrel Semiconductor, micrf302yml Datasheet

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micrf302yml

Manufacturer Part Number
micrf302yml
Description
Parallel Encoder
Manufacturer
Micrel Semiconductor
Datasheet
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.
encoded data serially, and can be connected directly to
any
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.
1.8 V to 3.6 V. The MICRF302 is battery friendly, and will
work with alkaline, NiCd, NiMh, lithium ion, or lithium
batteries.
_________________________________________________________________________________________________
Ordering Information
QwikRadio is a registered trademark of Micrel, Inc.
MLF and MicroLead Frame are registered trademark of Amkor Technology
October 2008
QwikRadio
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
Part Number
MICRF302YML
Note:
1. MLF is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
®
family radios to significantly shorten design
®
transmitter
MICRF302 can operate from
without
The MICRF302 outputs
Marking Code
any
XA02
additional
Temperature Range
-40ºC to +85ºC
Features
• Small form factor: 10-pin MLF
• Wide operating voltage range: 1.8 V to 3.6 V
• Low current consumption: 130µA operating, 0.1µA
• On-chip clock generation requires no external
• Unique 20-bit internal address allows up to 1 million
• Selectable data rates: 0.6, 1, 3, 4.8kbps
• 8-bit industry-standard CRC provides robust data
• 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
components
combinations to differentiate from adjacent encoders.
protection
rate communications links
Standby
Parallel Encoder
MICRF302
10-pin 2.5mm × 2.5mm MLF
Package
®
package
M9999-100908-A
®

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micrf302yml Summary of contents

Page 1

... NiCd, NiMh, lithium ion, or lithium batteries. _________________________________________________________________________________________________ Ordering Information Part Number MICRF302YML Note: 1. MLF is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free. QwikRadio is a registered trademark of Micrel, Inc. MLF and MicroLead Frame are registered trademark of Amkor Technology Micrel Inc. • ...

Page 2

Micrel, Inc. Typical Application D0 D1 MICRF302 D2 ENCODER D3 October 2008 DOUT TRANSMITTER TXEN Figure 1. RF Link Figure 2. MICRF302 and Micrel Transmitter 2 MICRF302 DO RECEIVER MCU M9999-100908-A ...

Page 3

Micrel, Inc. Pin Configuration Pin Description Pin Number Pin Name VSS 5 SEL0 6 SEL1 7 TXEN 8 DOUT 9 VDD 10 October 2008 ® 10-Pin MLF Package Pin Function Switch Input ...

Page 4

Micrel, Inc. Absolute Maximum Ratings Supply Voltage (V ) ……………………...…-0 Voltage on Any Pin................... VSS - 0 VDD + 0.3 V Junction Temperature ................................-55°C to +150°C Storage Temperature .................................-65°C to +150°C Lead Temperature ...

Page 5

Micrel, Inc. Functional Diagram October 2008 Figure 3. MICRF302 Parallel Encoder Functional Diagram 5 MICRF302 M9999-100908-A ...

Page 6

Micrel, Inc. Functional Description Overview The MICRF302 is an encoder that prepares data for transmission across an RF link parallel encoder, meaning that it provides multiple parallel inputs for connection to low-cost push-button switches. The MICRF302 encoder ...

Page 7

Micrel, Inc MICRF302 D2 ENCODER D3 PREAMBLE Operation Overview The Figure 4 shows the basic operation of a parallel encoder/decoder configuration. When a button is pushed (known as a push event), the MICRF302 Encoder sends packets of data ...

Page 8

Micrel, Inc. MICRF302 Parallel Encoder Features Transmit Timeout The MICRF302 implements a 25-second (nominal) transmit timeout timer user pushes an MICRF302 button and holds it down, transmission of packets (in repeated groups of four) will continue for no ...

Page 9

Micrel, Inc. Figure 9. MICRF302 Time Figure example link when a Micrel MICRF211 radio receiver is used to receive and demodulate a transmitted MICRF302 baseband signal. The MICRF302 Tester or the KEYFOB can be ...

Page 10

Micrel, Inc. Application Information Example: Four Button Transmitter using MICRF302 Encoder and MICRF112 Transmitter Device Figure 11. TX112-MICRF302 KEYFOB Evaluation Board Schematic October 2008 10 MICRF302 M9999-100908-A ...

Page 11

Micrel, Inc. MICRF302 Decoder Board Assembly MICRF302 Decoder, Figure 12 uses a QwikRadio receiver to receive the MICRF302 protocol. The data output of the receiver will Microchip PIC16F689 that has been programmed to decode the MICRF302 protocol. ...

Page 12

Micrel, Inc. Decoder and Encoder Test Configuration using a Micrel Transmitter and Receiver October 2008 Figure 13. Test Configuration 12 MICRF302 M9999-100908-A ...

Page 13

Micrel, Inc. PCB Board Layout Figure 14. TX112-MICRF302 Evaluation Board Assembly Figure 15. TX112-MICRF302 KEYFOB Evaluation Board, Top View October 2008 Figure 16. TX112-MICRF302 KEYFOB Evaluation Board, Bottom View 13 MICRF302 M9999-100908-A ...

Page 14

Micrel, Inc. Bill of Materials TX112-MICRF302 KEYFOB Evaluation Board Bill of Materials Item Quantity Reference 1 1 ANTENNA 2 1 BT1 C11 C16 8 1 ...

Page 15

Micrel, Inc. Package Information MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com The information furnished by Micrel in this data sheet is believed to be accurate and reliable. ...

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