SX1231H
ADVANCED COMMUNICATIONS & SENSING
SX1231H Transceiver
Low Power Integrated UHF Transceiver with On-Chip +20dBm PA
DATASHEET
RFIO
VBAT1&2
VR_ANA
VR_DIG
Power Distribution System
LNA
Σ/Δ
Single to
Mixers
Modulators
Differential
RC
Oscillator
GND
VR_PA
PA0
Ramp &
Control
PA_BOOST
PA1&2
Tank
Inductor
Loop
Filter
Division by
2, 4 or 6
Frac-N PLL
Synthesizer
XO
32 MHz
RSSI
AFC
RESET
SPI
RXTX
DIO0
DIO1
DIO2
DIO3
DIO4
DIO5
XTAL
GENERAL DESCRIPTION
The SX1231H is a highly integrated RF transceiver capable
of operation over a wide frequency range, including the 433,
868 and 915 MHz license-free ISM (Industry Scientific and
Medical) frequency bands. Its highly integrated architecture
allows for a minimum of external components whilst
maintaining maximum design flexibility. All major RF
communication parameters are programmable and most of
them can be dynamically set. The SX1231H offers the
unique advantage of programmable narrow-band and wide-
band communication modes without the need to modify
external components. The SX1231H is optimized for low
power consumption while offering high RF output power and
channelized operation. TrueRF™ technology enables a low-
cost external component count (elimination of the SAW
filter) whilst still satisfying ETSI and FCC regulations.
APPLICATIONS
Automated Meter Reading
Wireless Sensor Networks
Home and Building Automation
Wireless Alarm and Security Systems
Industrial Monitoring and Control
Wireless M-BUS
GND
KEY PRODUCT FEATURES
+20 dBm - 100 mW Power Output Capability
High Sensitivity: down to -120 dBm at 1.2 kbps
High Selectivity: 16-tap FIR Channel Filter
Bullet-proof front end: IIP3 = -18 dBm, IIP2 = +35 dBm,
80 dB Blocking Immunity, no Image Frequency response
Low current: Rx = 16 mA, 100nA register retention
Programmable Pout: -18 to +20 dBm in 1dB steps
Constant RF performance over voltage range of chip
FSK Bit rates up to 300 kb/s
Fully integrated synthesizer with a resolution of 61 Hz
FSK, GFSK, MSK, GMSK and OOK modulations
Built-in Bit Synchronizer performing Clock Recovery
Incoming Sync Word Recognition
115 dB+ Dynamic Range RSSI
Automatic RF Sense with ultra-fast AFC
Packet engine with CRC-16, AES-128, 66-byte FIFO
Built-in temperature sensor
ORDERING INFORMATION
MARKETS
Europe: EN 300-220-1
North America: FCC Part 15.247, 15.249, 15.231
Part Number
SX1231HIMLTRT
Delivery
Tape & Reel
MOQ / Multiple
3000 pieces
QFN 24 Package - Operating Range [-40;+85°C]
Pb-free, Halogen free, RoHS/WEEE compliant product
Rev 1 - Oct 2011
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