MRF49XA-I/ST Microchip Technology, MRF49XA-I/ST Datasheet - Page 9

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

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

2.0
The MRF49XA is an integrated, single chip ISM Band
Sub-GHz Transceiver. A simplified architectural block
diagram of the MRF49XA is shown in Figure 2-1.
The frequency synthesizer is clocked by an external
10 MHz crystal and generates the 433, 868 and
915 MHz radio frequency. The receiver with a Zero-IF
architecture consists of the following components:
• Low Noise Amplifier
• Down Conversion Mixers
• Channel Filters
• Baseband Limiting Amplifiers
• Receiver Signal Strength Indicator
The transmitter with a direct conversion architecture
has a typical output power of +7 dBm. An internal
transmit/receive switch combines the transmitter and
receiver circuits into differential RFP and RFN pins.
These pins are connected to the impedance matching
circuitry (Balun) and to the external antenna connected
to the device.
The device operates in the low-voltage range of 2.2V to
3.8V, and in Sleep mode, it operates at a very low-current
state, typically 0.3 μA.
© 2009 Microchip Technology Inc.
HARDWARE DESCRIPTION
Preliminary
The quality of the data is checked or validated using the
RSSI and DQI blocks built into the transceiver. Data is
buffered in transmitter registers and receiver FIFOs. The
Automatic Frequency Control feature allows the use of a
low-accuracy and low-cost crystal. The CLKOUT is used
to clock the external controller. The transceiver is con-
trolled via a 4-wire SPI, interrupt (INT/DIO and IRO),
FSK/DATA/FSEL, RCLKOUT/FCAP/FINT and RESET
pins. See Table 2-1 for pin details.
The MRF49XA supports the following feature blocks:
• Clock Generation
• Data Filtering and Amplification
• Data Pattern Recognition and Timing
• Data Processing and Storage
• Independent Transmit and Receiver FIFO Buffers
• Registers
These features reduce the processing load, and hence,
allows the use of low-cost 8-bit microcontrollers for
data processing.
MRF49XA
DS70590B-page 7