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Product Detailed Parameters
- Description：RF TRANS NPN 20V 700MHZ TO-92
- Series：-
- Mfr：onsemi
- Package：Bulk
- Transistor Type：NPN
- Voltage - Collector Emitter Breakdown (Max)：20V
- Frequency - Transition：700MHz
- Noise Figure (dB Typ @ f)：3dB @ 200MHz
- Gain：-
- Power - Max：625mW
- DC Current Gain (hFE) (Min) @ Ic, Vce：40 @ 20mA, 10V
- Current - Collector (Ic) (Max)：100mA
- Operating Temperature：-55°C ~ 150°C (TJ)
- Mounting Type：Through Hole
- Package / Case：TO-226-3, TO-92-3 Long Body
- Supplier Device Package：TO-92 (TO-226)
- Grade：-
- Qualification：-
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Overview
The BF959G is an NPN silicon VHF transistor manufactured by onsemi, designed for linear broadband amplifier stages and SAW filter driver applications in TV tuners. It operates within a collector-emitter voltage range of 20 Vdc and supports a continuous collector current of 100 mAdc. The device features a DC current gain (hFE) between 35 and 40 at 5.0 mAdc, with a current-gain bandwidth product (fT) reaching up to 700 MHz at 20 mAdc. Packaged in a TO-92 (CASE 29) housing, it maintains a junction temperature range from -55°C to +150°C.
Feature Summary
- Optimized for linear broadband VHF amplifier stages
- Designed specifically for SAW filter driver applications in TV tuners
- Provides high current-gain bandwidth product suitable for VHF frequencies
Applications
- Linear broadband VHF amplifier stages
- SAW filter driver applications in TV tuners
Procurement Notes
Verify the specific ordering suffix against the official datasheet to confirm package type and shipping quantity. The BF959G designation indicates a lead-free TO-92 package supplied in bulk boxes of 5000 units. Confirm that Style 21 pinout configuration matches the target circuit design before finalizing procurement orders.
Selection Notes
Select this component when designing circuits requiring a silicon NPN transistor optimized for VHF frequency ranges. Ensure the application stays within the 20 Vdc collector-emitter voltage limit and 100 mAdc continuous current rating. Verify thermal management requirements against the specified junction-to-ambient thermal resistance values for the chosen mounting style.
Part Context
This part belongs to the BF959 series of NPN silicon transistors intended for VHF applications. The 'G' suffix denotes compliance with lead-free manufacturing standards. It serves as a specialized discrete semiconductor component for analog signal processing within television tuner architectures.
Replacement Considerations
BF959ZL1G: Lead-free version in an ammo pack containing 2000 units per package.
FAQ
What is the maximum operating junction temperature for the BF959G?
The maximum operating and storage junction temperature range is -55°C to +150°C.
How is the pinout configured for the BF959G in the TO-92 package?
The standard pinout configuration (Style 21) assigns Pin 1 to Collector, Pin 2 to Emitter, and Pin 3 to Base.
What is the typical noise figure at 200 MHz?
The typical noise figure is 3.0 dB when measured at IC = 4.0 mA, VCE = 10 V, and RS = 50 Ω.
