MRF24J40
Data Sheet
IEEE 802.15.4™ 2.4 GHz
RF Transceiver
©
2010 Microchip Technology Inc.
Preliminary
DS39776C
Note the following details of the code protection feature on Microchip devices:
•
•
•
Microchip products meet the specification contained in their particular Microchip Data Sheet.
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
Microchip is willing to work with the customer who is concerned about the integrity of their code.
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
•
•
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR
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Trademarks
The Microchip name and logo, the Microchip logo, dsPIC,
K
EE
L
OQ
, K
EE
L
OQ
logo, MPLAB, PIC, PICmicro, PICSTART,
PIC
32
logo, rfPIC and UNI/O are registered trademarks of
Microchip Technology Incorporated in the U.S.A. and other
countries.
FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor,
MXDEV, MXLAB, SEEVAL and The Embedded Control
Solutions Company are registered trademarks of Microchip
Technology Incorporated in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, CodeGuard,
dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN,
ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial
Programming, ICSP, Mindi, MiWi, MPASM, MPLAB Certified
logo, MPLIB, MPLINK, mTouch, Octopus, Omniscient Code
Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit,
PICtail, REAL ICE, rfLAB, Select Mode, Total Endurance,
TSHARC, UniWinDriver, WiperLock and ZENA are
trademarks of Microchip Technology Incorporated in the
U.S.A. and other countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2010, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
ISBN: 978-1-60932-459-9
Microchip received ISO/TS-16949:2002 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC
®
MCUs and dsPIC
®
DSCs, K
EE
L
OQ
®
code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
DS39776C-page 2
Preliminary
©
2010 Microchip Technology Inc.
MRF24J40
IEEE 802.15.4
™
2.4 GHz RF Transceiver
Features:
• IEEE 802.15.4™ Standard Compliant
RF Transceiver
• Supports ZigBee
®
, MiWi™, MiWi P2P and
Proprietary Wireless Networking Protocols
• Simple, 4-Wire Serial Peripheral Interface (SPI)
• Integrated 20 MHz and 32.768 kHz Crystal
Oscillator Circuitry
• Low-Current Consumption:
- RX mode: 19 mA (typical)
- TX mode: 23 mA (typical)
- Sleep: 2
μA
(typical)
• Small, 40-Pin Leadless QFN 6x6 mm
2
Package
RF/Analog Features:
• ISM Band 2.405-2.48 GHz Operation
• Data Rate: 250 kbps (IEEE 802.15.4);
625 kbps (Turbo mode)
• -95 dBm Typical Sensitivity with +5 dBm
Maximum Input Level
• +0 dBm Typical Output Power with 36 dB
TX Power Control Range
• Differential RF Input/Output with Integrated
TX/RX Switch
• Integrated Low Phase Noise VCO, Frequency
Synthesizer and PLL Loop Filter
• Digital VCO and Filter Calibration
• Integrated RSSI ADC and I/Q DACs
• Integrated LDO
• High Receiver and RSSI Dynamic Range
MAC/Baseband Features:
• Hardware CSMA-CA Mechanism, Automatic
Acknowledgement Response and FCS Check
• Independent Beacon, Transmit and GTS FIFO
• Supports all CCA modes and RSSI/ED
• Automatic Packet Retransmit Capability
• Hardware Security Engine (AES-128) with CTR,
CCM and CBC-MAC modes
• Supports Encryption and Decryption for MAC
Sublayer and Upper Layer
Pin Diagram:
LCAP
V
DD
NC
V
DD
GND
V
DD
OSC1
OSC2
V
DD
V
DD
40 39 38 37 36 35 34 33 32 31
V
DD
RFP
RFN
V
DD
V
DD
GND
GPIO0
GPIO1
GPIO5
GPIO4
1
2
3
4
5
6
7
8
9
10
30
29
28
27
26
25
24
23
22
21
NC
NC
LPOSC1
LPOSC2
NC
GND
GND
NC
GND
V
DD
40-Pin QFN
MRF24J40
11 12 13 14 15 16 17 18 19 20
GPIO2
GPIO3
RESET
GND
WAKE
INT
SDO
SDI
SCK
CS
Note:
Backside center pad is GND.
©
2010 Microchip Technology Inc.
Preliminary
DS39776C-page 3
MRF24J40
1.0 Overview ...................................................................................................................................................................................... 5
2.0 Hardware Description................................................................................................................................................................... 7
3.0 Functional Description................................................................................................................................................................ 89
4.0 Applications .............................................................................................................................................................................. 135
5.0 Electrical Characteristics .......................................................................................................................................................... 141
6.0 Packaging Information.............................................................................................................................................................. 145
Appendix A: Revision History............................................................................................................................................................. 147
Index .................................................................................................................................................................................................. 149
The Microchip Web Site ..................................................................................................................................................................... 153
Customer Change Notification Service .............................................................................................................................................. 153
Customer Support .............................................................................................................................................................................. 153
Reader Response .............................................................................................................................................................................. 154
Product Identification System............................................................................................................................................................. 155
TO OUR VALUED CUSTOMERS
It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Microchip
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DS39776C-page 4
Preliminary
©
2010 Microchip Technology Inc.
MRF24J40
1.0
OVERVIEW
The MRF24J40 is an IEEE 802.15.4™ Standard com-
pliant 2.4 GHz RF transceiver. It integrates the PHY
and MAC functionality in a single chip solution.
Figure 1-1 shows a simplified block diagram of a
MRF24J40 wireless node. The MRF24J40 creates a
low-cost, low-power, low data rate (250 or 625 kbps)
Wireless Personal Area Network (WPAN) device. The
MRF24J40 interfaces to many popular Microchip PIC
®
microcontrollers via a 4-wire serial SPI interface,
interrupt, wake and Reset pins.
The MRF24J40 provides hardware support for:
• Energy Detection
• Carrier Sense
Three CCA Modes
CSMA-CA Algorithm
Automatic Packet Retransmission
Automatic Acknowledgment
Independent Transmit, Beacon and GTS FIFO
Buffers
• Security Engine supports Encryption and
Decryption for MAC Sublayer and Upper Layer
These features reduce the processing load, allowing
the use of low-cost 8-bit microcontrollers.
The MRF24J40 is compatible with Microchip's
ZigBee
®
, MiWi™ and MiWi P2P software stacks. Each
software stack is available as a free download, includ-
ing source code, from the Microchip web site:
http://www.microchip.com/wireless.
•
•
•
•
•
FIGURE 1-1:
Antenna
WIRELESS NODE BLOCK DIAGRAM
MRF24J40
CS
Matching
Circuitry
RFP
RFN
PHY
MAC
Interface
SDI
SDO
SCK
INT
Power
Management
Memory
WAKE
RESET
PIC
®
MCU
I/O
SDO
SDI
SCK
INTx
I/O
I/O
20 MHz
Crystal
©
2010 Microchip Technology Inc.
Preliminary
DS39776C-page 5
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