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MICRF600Z Datasheet(PDF) 19 Page - Micrel Semiconductor

Part # MICRF600Z
Description  902-928MHz ISM Band Transceiver Module
PDF  21 Pages
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MICRF600Z Datasheet(HTML) 19 Page - Micrel Semiconductor

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Micrel, Inc.
MICRF600/MICRF600Z
July 2006
19
M9999-082505
Application Circuit Illustration
MICRF600
4004
LDO
MCU
Figure 11. Circuit illustration of MICRF600, LDO and MCU
Figure 11. shows a typical set-up with the MICRF600, a
Low-Drop-Out voltage regulator (LDO)
and a mikro-
controller (MCU). When the MICRF600 and the MCU runs
on the same power supply (min 2.0, max. 2.5V), the IO
can be connected directly to the MCU. If the MCU needs a
higher VDD than the max. specified VDD of the MICRF600
(2.5V), voltage dividers need to be added on the IO lines
not to override the max. input voltage.
Figure 12 shows a recommended voltage divider circuit for
a MCU running at 3.0V and the MICRF600 at 2.5V.
3k3
18k
3k3
18k
3k3
18k
15k
MICRF6xx
MCU
CS
SCLK
IO
DATAIXO
DATACLK
LD
RSSI
CS
SCLK
IO
DATAIXO
DATACLK
LD
RSSI
Figure 12. How to connect MCU600 (2.5V) and MCU (3.0V)
Assembling the MICRF600
Recommended Reflow Temperature Profile
When the MICRF600 module is being automatically
assembled to a PCB, care must be taken not to expose
the module for temperature above the maximum specified.
Figure 13 shows the recommended reflow temperature
profile.
Figure 13. Recommended Reflow Temperature Reflow
Shock/Vibration during Reflow
The module has several components inside which are
assembled in a reflow process. These components may
reflow again when the module is assembled onto a PCB. It
is therefore important that the module is not subjected to
any mechanical shock or vibration during this process.
Handassembling the MICRF600
It is recommended to use solder paste also during hand
assembling of the module. Because of the module ground
pad on the bottom side, the module will be assembled
most efficient if the heat is being subjected to the bottom
side of the PCB. The heat will be transferred trough the
PCB due the ground vias under the module (see Layout
Considerations). In addition, it is recommended to use a
solder tip on the signal and power pads, to make sure the
solder points are properly melted.



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