Overview
The MMBF5484 is an N-Channel RF JFET (Junction Field-Effect Transistor) manufactured by Fairchild Semiconductor, now part of ON Semiconductor. This device is primarily designed for electronic switching applications, particularly those requiring low On Resistance analog switching. The MMBF5484 is part of a family of RF JFETs that include the MMBF5485 and MMBF5486, all of which are sourced from Process 50.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Drain-Gate Voltage (VDG) | 25 | V |
| Gate-Source Voltage (VGS) | -25 | V |
| Forward Gate Current (IGF) | 10 | mA |
| Operating and Storage Junction Temperature Range | -55 to +150 | °C |
| Continuous Drain Current (ID) | 5 | mA |
| Total Device Dissipation (PD) | 225 | mW |
| Thermal Resistance, Junction to Case (RJC) | - | °C/W |
| Thermal Resistance, Junction to Ambient (RJA) | 556 | °C/W |
| Gate-Source Breakdown Voltage (V(BR)GSS) | -25 | V |
| Zero-Gate Voltage Drain Current (IDSS) | 1.0 - 5.0 | mA |
| Forward Transfer Conductance (gfs) | 3000 - 6000 | μmhos |
Key Features
- N-Channel RF JFET designed for RF amplifier and switching applications.
- Low On Resistance, making it suitable for analog switching.
- High forward transfer conductance (gfs) for efficient signal amplification.
- Low noise figure, especially at frequencies up to 400 MHz.
- Interchangeable source and drain pins.
- ROHS compliant.
- Packaged in SOT-23 (Pb-Free) case.
Applications
The MMBF5484 is ideal for various electronic switching applications, including:
- RF amplifiers and pre-amplifiers.
- Analog switching circuits where low On Resistance is critical.
- Low noise amplifier circuits, particularly in the VHF and UHF frequency ranges.
- General-purpose RF and microwave applications.
Q & A
- What is the maximum drain-gate voltage for the MMBF5484? The maximum drain-gate voltage (VDG) is 25 V.
- What is the operating temperature range for the MMBF5484? The operating and storage junction temperature range is -55°C to +150°C.
- What is the typical forward transfer conductance of the MMBF5484? The forward transfer conductance (gfs) is typically between 3000 to 6000 μmhos.
- Is the MMBF5484 ROHS compliant? Yes, the MMBF5484 is ROHS compliant.
- What is the package type for the MMBF5484? The MMBF5484 is packaged in a SOT-23 (Pb-Free) case.
- What are the key applications of the MMBF5484? The MMBF5484 is used in RF amplifiers, analog switching circuits, and low noise amplifier circuits.
- Can the source and drain pins be interchanged? Yes, the source and drain pins of the MMBF5484 are interchangeable.
- What is the maximum continuous drain current for the MMBF5484? The maximum continuous drain current (ID) is 5 mA.
- What is the thermal resistance from junction to ambient for the MMBF5484? The thermal resistance from junction to ambient (RJA) is 556 °C/W.
- What is the noise figure of the MMBF5484 at 100 MHz? The noise figure at 100 MHz is typically 3.0 dB.
