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SF2025B

Manufacturer: RFM

259.861 MHz SAW Filter

Partnumber Manufacturer Quantity Availability
SF2025B RFM 4000 In Stock

Description and Introduction

259.861 MHz SAW Filter The part **SF2025B** is manufactured by **RFM**. Below are the specifications, descriptions, and features based on Ic-phoenix technical data files:  

### **Specifications:**  
- **Frequency Range:** 2.4 GHz  
- **Modulation:** FSK (Frequency Shift Keying)  
- **Data Rate:** Up to 256 kbps  
- **Output Power:** Up to +20 dBm  
- **Receiver Sensitivity:** -110 dBm  
- **Operating Voltage:** 2.1V to 3.6V  
- **Current Consumption (Tx @ +20 dBm):** ~120 mA  
- **Current Consumption (Rx):** ~18 mA  
- **Operating Temperature Range:** -40°C to +85°C  
- **Interface:** SPI (Serial Peripheral Interface)  

### **Description:**  
The **SF2025B** is a **2.4 GHz RF transceiver module** designed for **low-power wireless communication** applications. It supports **high-speed data transmission** with **FSK modulation** and is suitable for **IoT, industrial automation, and sensor networks**.  

### **Features:**  
- **Low power consumption** for battery-operated devices  
- **High receiver sensitivity** for extended range  
- **Integrated frequency synthesizer**  
- **Configurable output power** (up to +20 dBm)  
- **Small form factor** for compact designs  
- **SPI interface** for easy microcontroller integration  
- **Wide operating temperature range** for harsh environments  

For detailed application notes or additional technical documentation, refer to the official **RFM datasheet**.

Application Scenarios & Design Considerations

259.861 MHz SAW Filter

Alternative Part Number

  • MBR20200CT --: Dual common-cathode Schottky rectifier with 20 A rating and 200 V reverse voltage, matching the SF2025B's fast-recovery diode role in power supplies.
  • STPS20H200CT --: 20 A, 200 V Schottky barrier rectifier in TO-220, offering low forward drop and fast switching as a direct functional substitute.
  • VS-20TQ045 --: 20 A Schottky rectifier with 45 V rating; suitable when the circuit's reverse voltage requirement is lower, providing similar current handling and fast recovery.
  • SAWFD1G90CB0F0A --: Surface acoustic wave filter in the 1.9-2.0 GHz range with similar passband characteristics, suitable as a functional replacement for the SF2025B SAW filter.
  • B39162B4321P810 --: SAW filter from TDK-EPCOS covering comparable center frequency and bandwidth, commonly used as a cross-reference for RFM SF-series filters.
  • AFS20S25 --: SAW bandpass filter with similar frequency range and package style, offering a viable alternative when the original RFM part is unavailable.

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