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PDF MRF24J40ME Data sheet ( Hoja de datos )
| Número de pieza | MRF24J40ME | |
| Descripción | RF Transceiver Module | |
| Fabricantes | Microchip | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MRF24J40ME (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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MRF24J40MD/ME
2.4 GHz IEEE Std. 802.15.4™
RF Transceiver Module with PA/LNA
Features:
• IEEE Std. 802.15.4™ Compliant RF Transceiver
• Supports ZigBee®, MiWi™ Development
Environment Proprietary Wireless Networking
Protocols
• 4-Wire Serial Peripheral Interface (SPI) with
Interrupt
• Small size: 0.9" x 1.3" (22.9 mm x 33.0 mm),
Surface Mountable: Pin Compatible with
MRF24J40MB and MRF24J40MC
• Integrated Crystal, Internal Voltage Regulator,
Matching Circuitry, Power Amplifier, Low Noise
Amplifier
• PCB Antenna (MRF24J40MD), External Antenna
Connector (MRF24J40ME): Ultra Miniature
Coaxial (U.FL), 50Ω
• Easy Integration into Final Product: Minimize
Product Development, Quicker Time to Market
• Compliance:
- Modular Certified for the United States (FCC)
and Canada (IC)
- European R&TTE Directive Assessed Radio
Module
- Australia/New Zealand
• Compatible with Microchip microcontroller
families (PIC16, PIC18, PIC24, dsPIC33 and
PIC32)
• Range up to 4000 ft
Pin Diagram:
Operational:
• Operating Voltage: 3.0V-3.6V (3.3V typical)
• Temperature Range: -40°C to +85°C Industrial
• Low-Current Consumption:
- Rx Mode: 32 mA (typical)
- Tx Mode: 140 mA (typical)
- Sleep: 10 A (typical)
RF/Analog Features:
• ISM Band 2.405 GHz-2.475 GHz Operation
• Data Rate: 250 kbps
• -104 dBm Typical Sensitivity with -23 dBm
Maximum Input Level
• +19 dBm Typical Output Power with 45 dB Tx
Power Control Range
• 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 RSSI Dynamic Range
MAC/Baseband Features:
• Hardware CSMA-CA Mechanism, Automatic ACK
Response and FCS Check
• Independent Beacon, Transmit and GTS FIFO
• Supports all CCA modes and RSS/LQI
• Automatic Packet Retransmit Capable
• Hardware Security Engine (AES-128) with CTR,
CCM and CBC-MAC modes
• Supports Encryption and Decryption for MAC Sub
layer and Upper Layer
GND
RESET
WAKE
INT
SDI
SCK
1
2
3
4
5
6
12 GND
11 GND
10 VIN
9 NC
8 CS
7 SDO
2014 Microchip Technology Inc.
Advance Information
DS70005173A-page 1
1 page  
1.2 Mounting Details
The MRF24J40MD/ME is a surface mountable mod-
ule. Module dimensions are shown in Figure 1-3. The
module Printed Circuit Board (PCB) is 0.032" thick
with castellated mounting points on the edge.
Figure 1-4 is a recommended host PCB footprint for
the MRF24J40MD/ME.
The MRF24J40MD has an integrated PCB antenna.
For the best performance, follow the mounting details
shown in Figure 1-5. It is recommended that the mod-
ule be mounted on the edge of the host PCB, and an
area around the antenna, approximately 1.2", be kept
clear of metal objects. A host PCB ground plane
around the MRF24J40MD acts as a counterpoise to
the PCB antenna. It is recommended to extend the
ground plane at least 0.4" around the module.
MRF24J40MD/ME
The MRF24J40ME has 50Ω ultra miniature coaxial
(U.FL) connector.
Caution: The U.FL connector is fragile and can only
tolerate very limited number of insertions.
1.3 Soldering Recommendations
The MRF24J40MD/ME module was assembled using
a standard lead-free reflow profile. The module is com-
patible with standard lead-free solder reflow profiles. To
avoid damaging the module, the following recommen-
dations are given:
• Refer to the solder paste data sheet for specific
reflow profile recommendations
• Use no-clean flux solder paste
• Do not wash as moisture can be trapped under
the shield
• Use only one flow. If the PCB requires multiple
flows, apply the module on the last flow
FIGURE 1-3:
MODULE DETAILS
2014 Microchip Technology Inc.
Advance Information
DS70005173A-page 5
5 Page 
MRF24J40MD/ME
2.0 CIRCUIT DESCRIPTION
The MRF24J40MD/ME is a 2.4 GHz IEEE
Std. 802.15.4™ compliant surface mount module with
integrated crystal, internal voltage regulator, matching
circuitry, power amplifier, low noise amplifier with PCB
trace antenna (MRF24J40MD) and 50Ω external
antenna connector (MRF24J40ME).
The MRF24J40MD/ME module interfaces to many
popular Microchip PIC microcontrollers through a 4-wire
SPI Interface, interrupt, wake, reset, power and ground.
An example application schematic is illustrated in
Figure 2-4.
Serial communications and register definitions for the
MRF24J40MD/ME module are documented in the
“MRF24J40 Data Sheet” (DS39776). Refer to this data
sheet for specific serial interface protocol and register
definitions. Also, see Section 1.4 “Operation” for
specific register settings that are unique to the
MRF24J40MD/ME module.
2.1 PCB Antenna (MRF24J40MD)
The Printed Circuit Board (PCB) antenna is fabricated
on the top copper trace of the module PCB. The layers
below the antenna have no copper traces. The ground
and power planes under the components serve as a
counterpoise to the PCB antenna. Additional ground
plane on the host PCB will substantially enhance the
performance of the module. For best performance,
place the module on the host PCB following the recom-
mendations in Section 1.2 “Mounting Details”.
The PCB antenna was designed and simulated using
Ansoft Designer® and HFSS™ 3D full-wave solver soft-
ware by Ansoft Corporation (www.ansoft.com) and
tested in an anechoic room. The design goal was to
create a compact, low-cost antenna with the best radi-
ation pattern. Figure 2-1 shows the simulation drawing
and Figure 2-2 and Figure 2-3 show the 2D and 3D
radiation patterns, respectively. As shown by the radia-
tion patterns, the performance of the antenna is depen-
dent upon the orientation of the module. The discrete
matching circuitry matches the impedance of the
antenna with the MRF24J40 transceiver IC.
FIGURE 2-1:
PCB ANTENNA SIMULATION DRAWING
2014 Microchip Technology Inc.
Advance Information
DS70005173A-page 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MRF24J40ME.PDF ] | |
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