MRF24J40MD Datasheet, PDF (27/34 Pages) Microchip Technology – 2.4 GHz IEEE Std. 802.15.4™ RF Transceiver Module with PA/LNA

MRF24J40MD/ME
APPENDIX A:
MIGRATING FROM
MRF24J40MB OR
MRF24J40MC TO
MRF24J40MD/ME
MODULE
A.1 Introduction
This appendix assists in migrating designs from the
MRF24J40MB or MRF24J40MC to the MRF24J40MD/
ME module.
A.2 Background
The Power Amplifier (PA) and Low-Noise Amplifier
(LNA) used in the MRF24J40MB and MRF24J40MC
modules were discontinued by the manufacturer. This
required a redesign of the modules with new compo-
nents. The MRF24J40MD/ME module was designed
with the goal of requiring minimal changes when
migrating from the MRF24J40MB or MRF24J40MC
module.
A.3 Circuit Description
The MRF24J40MD/ME module was designed with the
SST12LP17E Power Amplifier (PA) and SST12LN01
Low-Noise Amplifier (LNA). Control of the PA and LNA
by the MRF24J40 is the same for all modules. GPIO0,
GPIO1, and GPIO2 sequence the PA and LNA during
transmit and receive by the MRF24J40. Refer to
Section 1.4.1 “PA/LNA Control” for more information.
The MRF24J40MD/ME has the same physical footprint
and pin out.
The PCB trace antenna is the same for both the
MRF24J40MD and MRF24J40MB modules.
The external antenna connector, U.FL, is the same for
both the MRF24J40ME and MRF24J40MC modules.
A.4 Regulatory Approval
Due to the requirement for a redesigned module with
new RF components, new regulatory certifications for
the United States (FCC), Canada (IC) and Europe were
performed.
When migrating from the MRF24J40MB or
MRF24J40MC module to the MRF24J40MD/ME mod-
ule, the new FCC ID and IC numbers will have to be
displayed on the outside of the finished product. Refer
to Section 3.1.1 “Labeling and User Information
Requirements” for the United States and
Section 3.2.1 “Labeling and User Information
Requirements” for Canada.
For Europe, the R&TTE Directive will have to be
assessed using the new reports listed in Table 3-1.
For Australia, product certification and compliance
folder should be re-assessed.
A.5 Electrical Characteristics
Comparison
This section helps compare electrical characterization
values between modules.
TABLE A-1: CURRENT CONSUMPTION COMPARISON
TA = 25°C, VDD = 3.3V
Chip Mode
Condition
MRF24J40MB
(Typ)
MRF24J40MC
(Typ)
Sleep
Sleep Clock Disabled
210
12
Tx
At Maximum Output
130
120
Power
Rx
—
25
25
MRF24J40MD/ME
(Typ)
10
140
32
Units
uA
mA
mA
 2014 Microchip Technology Inc.
Advance Information
DS70005173A-page 27