MRF24J40-I/ML Microchip Technology, MRF24J40-I/ML Datasheet - Page 136

• Manufacturer Part Number: MRF24J40-I/ML
• Description: IC TXRX IEEE/ZIGBEE 2.4GHZ 40QFN
• Manufacturer: Microchip Technology

Specifications of MRF24J40-I/ML

• Package / Case: 40-QFN
• Frequency: 2.4GHz
• Data Rate - Maximum: 250kbps
• Modulation Or Protocol: 802.15.4
• Applications: ISM, ZigBee™
• Power - Output: 0dBm
• Sensitivity: -95dBm
• Voltage - Supply: 2.4 V ~ 3.6 V
• Current - Receiving: 18mA
• Current - Transmitting: 18mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Number Of Receivers: 1
• Number Of Transmitters: 1
• Wireless Frequency: 2.4 GHz
• Interface Type: 4 Wire SPI
• Noise Figure: 8 dB
• Output Power: + 0 dBm
• Operating Supply Voltage: 2.5 V, 3.3 V
• Maximum Operating Temperature: 85 C
• Mounting Style: SMD/SMT
• Maximum Supply Current: 22 mA
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

4.2
External PA, LNA and RF switches can be controlled by
the MRF24J40 internal RF state machine. Figure 4-3
shows a typical application circuit with external PA,
LNA
(0x22F<2:0>) bits to ‘111’ will configure pins, GPIO0,
GPIO1 and GPIO2, to operate according to Table 4-1.
The external PA/LNA timing diagram is shown in
Figure 4-4.
FIGURE 4-3:
DS39776C-page 136
MRF24J40
Antenna
and
External PA/LNA Control
RF
Switch
switches.
RF
EXTERNAL PA/LNA BLOCK DIAGRAM
Setting
LNA
PA
LNA
Enable
PA
Enable
TESTMODE
Switch
RF
Preliminary
TABLE 4-1:
GPIO0
GPIO1
GPIO2
Balun
GPIO
Receive
High
Low
Low
GPIO EXTERNAL PA/LNA
SIGNALING
© 2010 Microchip Technology Inc.
RFP
RFN
GPIO0
GPIO1
GPIO2
Transmit
High
High
Low
MRF24J40
Maximum
Current
Source
4 ma
1 ma
1 ma