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SI4431BDY-T1-E3
+BOMMOSFET P-CH 30V 5.7A 8SO
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ManufacturerVishay Siliconix
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Mfr. Part #SI4431BDY-T1-E3
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In Stock3289
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Specifications
| Attribute | Value |
| Supplier | Vishay Siliconix |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Series | TrenchFET® |
| Part Status | Active |
| FET Type | P-Channel |
| Technology | MOSFET (Metal Oxide) |
| Drain to Source Voltage (Vdss) | 30 V |
| Current - Continuous Drain(Id) @ 25°C | 5.7A (Ta) |
| Drive Voltage(Max Rds On Min Rds On) | 4.5V, 10V |
| Rds On(Max) @ Id Vgs | 30mOhm @ 7.5A, 10V |
| Vgs(th)(Max) @ Id | 3V @ 250µA |
| Gate Charge(Qg)(Max) @ Vgs | 20 nC @ 5 V |
| Vgs(Max) | ±20V |
| Power Dissipation (Max) | 1.5W (Ta) |
| Operating Temperature | -55°C ~ 150°C (TJ) |
| Mounting Type | Surface Mount |
| Supplier Device Package | 8-SOIC |
Overview
Description
SI4431BDY-T1-E3 is a Silicon Labs wireless RF transceiver IC intended for low‑power ISM-band applications. It integrates a programmable frequency synthesizer, RF front end, and baseband/packet handling, and is controlled via SPI by a microcontroller. It supports modulation schemes such as FSK/GFSK and OOK/ASK, and is designed for sub‑GHz ISM bands (exact frequency range depends on variant). It provides RX/TX paths, RSSI, and configurable data rates. Typical designs require an external RF matching network (balun, filters), a regulator, and an MCU to load configuration over SPI. Packaging is a compact surface-mount option; T1‑E3 denotes a specific package/temperature grade and tape‑and‑reel option. Common applications include remote controls, wireless sensors, metering, and home/industrial IoT. For exact specs—frequency range, transmit power, data rate, current consumption, and pinout—consult the official datasheet and application notes.
Equivalent
SI4431BDY-T1-E3 (Si4431) equivalents:
- Silicon Labs Si446x family (Si4461/Si4463) — modern direct replacements
- TI CC1101 — popular sub‑GHz FSK/OOK transceiver
- Semtech SX1231/SX1232 — FSK/OOK sub‑GHz transceivers
- Modules built on these chips (HopeRF RFM22B/RFM69, EBYTE E22/E32) for plug‑in swaps
Always verify frequency range, pinout, power, and modem features before substituting.
- Silicon Labs Si446x family (Si4461/Si4463) — modern direct replacements
- TI CC1101 — popular sub‑GHz FSK/OOK transceiver
- Semtech SX1231/SX1232 — FSK/OOK sub‑GHz transceivers
- Modules built on these chips (HopeRF RFM22B/RFM69, EBYTE E22/E32) for plug‑in swaps
Always verify frequency range, pinout, power, and modem features before substituting.
Features
Here are the typical features of SI4431BDY-T1-E3 (Si4431 family) transceiver:
- Highly integrated sub-1 GHz RF transceiver with on-chip VCO/PLL and RF front-end.
- Broad tunability across common ISM sub-GHz bands (frequency programmable via the PLL).
- Modulation support: GFSK (FSK), and OOK/ASK.
- Programmable data rates (up to hundreds of kbps) and adjustable frequency deviation.
- TX power and RX sensitivity adjustable for power/performance trade-offs.
- 50-ohm RF port with on-chip impedance matching.
- Built-in RF front-end: LNA, mixer, PA (power amplifier), and IF handling.
- Packet-oriented operation: CRC, address filtering, length fields, FIFO for TX/RX.
- RSSI, AFC, and other RF measurement/monitoring features.
- SPI control Interface with IRQs for packet events; wake/ sleep modes.
- Low-power operation with multiple power modes and fast wake-up.
- Small package (QFN) with industrial temperature range.
Note: exact numbers (bands, data rates, current/power ranges) are in the official datasheet for the T1-E3 variant.
- Highly integrated sub-1 GHz RF transceiver with on-chip VCO/PLL and RF front-end.
- Broad tunability across common ISM sub-GHz bands (frequency programmable via the PLL).
- Modulation support: GFSK (FSK), and OOK/ASK.
- Programmable data rates (up to hundreds of kbps) and adjustable frequency deviation.
- TX power and RX sensitivity adjustable for power/performance trade-offs.
- 50-ohm RF port with on-chip impedance matching.
- Built-in RF front-end: LNA, mixer, PA (power amplifier), and IF handling.
- Packet-oriented operation: CRC, address filtering, length fields, FIFO for TX/RX.
- RSSI, AFC, and other RF measurement/monitoring features.
- SPI control Interface with IRQs for packet events; wake/ sleep modes.
- Low-power operation with multiple power modes and fast wake-up.
- Small package (QFN) with industrial temperature range.
Note: exact numbers (bands, data rates, current/power ranges) are in the official datasheet for the T1-E3 variant.
Pinout
Si4431BDY-T1-E3 is supplied in a 20-pin package. Key pin functions (see datasheet for exact pin numbering):
- RF: single RF I/O/antenna pin for TX/RX (RFIO/ANT)
- Power: VDD (supply) and GND pins
- SPI control: SDI (MOSI), SDO (MISO), SCLK, nSEL (chip select)
- Control/status: nIRQ (interrupt), SDN (shutdown/power-down)
- GPIOs: up to four programmable GPIO pins (GPIO0–GPIO3)
- Clock/XTAL: crystal or clock input/outputs (XTAL/CLK) as required by the radio core
- NC/Reserved: several no-connect or reserved pins for factory/test use
For the full pin-out, exact pin numbers and electrical characteristics, consult the official Si4431 datasheet.
- RF: single RF I/O/antenna pin for TX/RX (RFIO/ANT)
- Power: VDD (supply) and GND pins
- SPI control: SDI (MOSI), SDO (MISO), SCLK, nSEL (chip select)
- Control/status: nIRQ (interrupt), SDN (shutdown/power-down)
- GPIOs: up to four programmable GPIO pins (GPIO0–GPIO3)
- Clock/XTAL: crystal or clock input/outputs (XTAL/CLK) as required by the radio core
- NC/Reserved: several no-connect or reserved pins for factory/test use
For the full pin-out, exact pin numbers and electrical characteristics, consult the official Si4431 datasheet.
Manufacturer
Manufacturer: Silicon Labs (Silicon Laboratories).
Type of company: A fabless semiconductor company that designs and markets mixed-signal integrated circuits, including wireless RF transceivers and microcontrollers.
Type of company: A fabless semiconductor company that designs and markets mixed-signal integrated circuits, including wireless RF transceivers and microcontrollers.
Application
Typical application areas for SI4431BDY-T1-E3:
- Sub-GHz ISM wireless links for low-power devices
- Wireless sensor networks (industrial and environmental)
- Smart metering and utility telemetry
- Home/building automation (security, lighting, HVAC)
- Remote control and actuator interfaces
- Industrial automation and process control
- Asset tracking and logistics
- Portable medical/fitness devices needing robust low-power wireless links
- Sub-GHz ISM wireless links for low-power devices
- Wireless sensor networks (industrial and environmental)
- Smart metering and utility telemetry
- Home/building automation (security, lighting, HVAC)
- Remote control and actuator interfaces
- Industrial automation and process control
- Asset tracking and logistics
- Portable medical/fitness devices needing robust low-power wireless links
Package
The SI4431BDY-T1-E3 is supplied in a 20-pin QFN (DFN-20) package, 4.0 mm × 4.0 mm.
