MRF24J40MD Datasheet, PDF (5/34 Pages) Microchip Technology – 2.4 GHz IEEE Std. 802.15.4™ RF Transceiver Module with PA/LNA

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