MRF49XA-I/ST Microchip Technology, MRF49XA-I/ST Datasheet - Page 45

IC RF TXRX 433/868/915 16-TSSOP

MRF49XA-I/ST

Manufacturer Part Number
MRF49XA-I/ST
Description
IC RF TXRX 433/868/915 16-TSSOP
Manufacturer
Microchip Technology
Datasheet

Specifications of MRF49XA-I/ST

Package / Case
16-TSSOP
Frequency
433MHz, 868MHz, 915MHz
Data Rate - Maximum
256kbps
Modulation Or Protocol
FHSS, FSK
Applications
Home / Industrial Automation, Remote Access, Security Alarms
Power - Output
7dbm
Sensitivity
-110dBm
Voltage - Supply
2.2 V ~ 3.8 V
Current - Receiving
11mA
Current - Transmitting
15mA
Data Interface
PCB, Surface Mount
Antenna Connector
PCB, Surface Mount
Operating Temperature
-40°C ~ 85°C
Number Of Receivers
1
Number Of Transmitters
2
Wireless Frequency
433 MHz to 915 MHz
Output Power
+ 7 dBm
Operating Supply Voltage
2.5 V, 3.3 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Modulation
FHSS, FSK
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Memory Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
579-MRF49XA-1/ST

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MRF49XA-I/ST
Manufacturer:
IR
Quantity:
450
Part Number:
MRF49XA-I/ST
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
3.0
The MRF49XA is a low-power, Zero-IF, multi-channel
FSK transceiver which operates in the 433, 868 and
915 MHz frequency bands. All the RF and baseband
functions and processes are integrated in the
MRF49XA. The device for its operation requires only a
single, 10 MHz crystal as a reference source and an
external, low-cost host microcontroller. The MRF49XA
supports the following functions:
• Reset
• Power Amplifier and Low Noise Amplifier
• Synthesizer (PLL, VCO and Oscillator)
• I/Q Mixers and Demodulators
• Baseband Filters and Amplifiers
• Received Signal Strength Indicator
• Low Battery Detector
• Wake-up Timer/Low Duty Cycle Mode
• Data Quality Indicator
The MRF49XA is the best option for Frequency Hopping
Spread
frequency agility to meet FCC, IC or ETSI requirements.
The communication link can be created by just using the
MRF49XA along with a low-cost microcontroller. The
device uses the different power-saving modes to reduce
the overall current consumption, and thereby, extends
the battery life of the system or application.
FIGURE 3-1:
© 2009 Microchip Technology Inc.
FUNCTIONAL DESCRIPTION
Spectrum
(Pin 10)
RESET
Output
(FHSS)
POWER-ON RESET EXAMPLE
1.6V
V
H
L
DD
applications
Voltage (600 mV)
Reset Threshold
requiring
Preliminary
The device stays in Reset when V
(even if the voltage difference is smaller
than the Reset threshold).
3.1
The MRF49XA supports four types of Reset:
• Power-on Reset
• Power Glitch Reset
• Software Reset
• Reset Pin
3.1.1
The MRF49XA has a built-in Power-on Reset circuitry
which automatically resets all control registers when
power is applied. A delay of 100 ms is recommended
after a power-up sequence in order to allow the V
reach the correct voltage level and to get stabilized to
recognize an active-low Reset. In Reset mode, the
device does not accept the control commands through
the SPI.
After power-up, the supply voltage starts to rise above
0V. The Reset block has an internal ramping voltage
reference level (Reset ramp signal) which rises at a
100 mV/ms (typical) rate. The device remains in the
Reset state until the voltage difference between the
actual V
than the Reset threshold voltage level (typically
600 mV). The device remains in Reset mode as long as
the V
irrespective of the voltage difference between the V
and the internal ramp signal. Figure 3-1 graphically
shows the POR example for V
conditions.
(100 mV/ms)
Reset Ramp
DD
Line
DD
Reset
voltage level is less than 1.6V (typical),
and the internal Reset ramp signal is higher
POWER-ON RESET
Time
MRF49XA
DD
DD
< 1.6V
with respect to time
DS70590B-page 43
DD
DD
to

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