Specifications

77
clock (SCK), while the data will exchange through the SPI data in and out (SDI,
SDO) pins. All data communications with the module are through the SPI
interface.
Figure 35 MRF24J40MB to Microcontroller Interface (Reprinted with
permission from MicroChip®)
When operating the MRF24J40MB RF transceiver module, supplying power to
the chip is one of our biggest challenges. Making sure that the voltage to the
different parts on the chip is correct is essential. For the recommended operating
conditions of the module, Table 23 below outlines the key areas. The supply
voltage (VDD) for the RF, analog, and digital circuits, is the 2.4V – 3.6V range
typical of standard industry RF transceiver modules. The one area to be
concerned with when designing is the input high voltage, and input low voltage.
Too much or too little voltage can affect the operation of the module and
ultimately lead to failure if not properly addressed in the design phase and build
of the system.
Parameters
Min
Typ
Max
Units
Ambient
Operating
Temperature
-40
______
+ 85
ºC
Supply
Voltage for
RF, Analog
and Digital
Circuits
2.4
3.3
3.6
V
Supply
Voltage for
2.4
______
3.6
V