Tx/Rx Split 4431 Rev B1 TRx Te

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Lead Time 3 weeks
Unit Price:$58.82
Minumum Qty: 1
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Silicon Laboratories’ Si4430/31/32 devices are highly integrated, single chip wireless ISM transceivers. The high-performance EZRadioPRO® family includes a complete line of transmitters, receivers, and transceivers allowing the RF system designer to choose the optimal wireless part for their application.

The Si4430/31/32’s high level of integration offers reduced BOM cost while simplifying the overall system design. The extremely low receive sensitivity (–121 dBm) coupled with industry leading +20 dBm output power ensures extended range and improved link performance. Built-in antenna diversity and support for frequency hopping can be used to further extend range and enhance performance.

The Si4430/31/32 offers advanced radio features including continuous frequency coverage from 240–960 MHz in 156 Hz or 312 Hz steps allowing precise tuning control. Additional system features such as an automatic wake-up timer, low battery detector, 64 byte TX/RX FIFOs, automatic packet handling, and preamble detection reduce overall current consumption and allow the use of lower-cost system MCUs. An integrated temperature sensor, general purpose ADC, poweron-reset (POR), and GPIOs further reduce overall system cost and size.

The Si4430/31/32’s digital receive architecture features a high-performance ADC and DSP based modem which performs demodulation, filtering, and packet handling for increased flexibility and performance. The direct digital transmit modulation and automatic PA power ramping ensure precise transmit modulation and reduced spectral spreading ensuring compliance with global regulations including FCC, ETSI, ARIB, and 802.15.4d regulations.

An easy-to-use calculator is provided to quickly configure the radio settings, simplifying customer's system design and reducing time to market.


• Remote control
• Home security & alarm
• Telemetry
• Personal data logging
• Toy control
• Tire pressure monitoring
• Wireless PC peripherals
• Remote meter reading
• Remote keyless entry
• Home automation
• Industrial control
• Sensor networks
• Health monitors
• Tag readers

Symmetry Electronics is an authorized Silicon Labs distributor.


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Frequency Range
240930 MHz (Si4431/32)
900960 MHz (Si4430)
Sensitivity = 121 dBm
Output power range
+20 dBm Max (Si4432)
+13 dBm Max (Si4430/31)
Low Power Consumption
18.5 mA receive
30 mA @ +13 dBm transmit
85 mA @ +20 dBm transmit
Data Rate = 0.123 to 256 kbps
FSK, GFSK, and OOK modulation
Power Supply = 1.8 to 3.6 V
Ultra low power shutdown mode
Digital RSSI
Wake-up timer
Auto-frequency calibration (AFC)
Power-on-reset (POR)
Antenna diversity and TR switch control
Configurable packet handler
Preamble detector
TX and RX 64 byte FIFOs
Low battery detector
Temperature sensor and 8-bit ADC
40 to +85 C temperature range
Integrated voltage regulators
Frequency hopping capability
On-chip crystal tuning
20-Pin QFN package


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Tx/Rx Split 4431 Rev B1 TRx Te
Part #: 4431-T-B1_B_434
Tx/Rx Split 4431 Rev B1 TRx Te