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Product Detailed Parameters
- Description：RF TRANS NPN 12V SOT-23
- Series：-
- Mfr：Broadcom Limited
- Package：Tape & Reel (TR)
- Transistor Type：NPN
- Voltage - Collector Emitter Breakdown (Max)：12V
- Frequency - Transition：-
- Noise Figure (dB Typ @ f)：1dB ~ 1.6dB @ 900MHz ~ 2.4GHz
- Gain：9dB ~ 14.5dB
- Power - Max：225mW
- DC Current Gain (hFE) (Min) @ Ic, Vce：30 @ 5mA, 5V
- Current - Collector (Ic) (Max)：50mA
- Operating Temperature：150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：TO-236-3, SC-59, SOT-23-3
- Supplier Device Package：SOT-23
- Grade：-
- Qualification：-
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Overview
The AT-41533-TR1 is a general-purpose NPN silicon bipolar transistor housed in a 3-lead SOT-23 surface-mount package. It utilizes Agilent's 10 GHz fT Self-Aligned-Transistor process with nitride passivation and gold metalization. The device features a 14-finger interdigitated emitter geometry optimized for low noise figure and moderate power handling. At 900 MHz, it achieves a 1 dB noise figure and 14.5 dB associated gain at VCE = 5 V, IC = 5 mA. It is characterized for operation at 3, 5, and 8 volts, with typical amplifier designs yielding over 15 dB gain at 5 V bias.
Feature Summary
- General purpose NPN bipolar transistor designed for high-frequency applications
- Optimized for low noise figure and easy impedance matching near 50 ohms
- Fabricated using self-aligned-transistor process with nitride passivation
Applications
- Wireless systems as a Low Noise Amplifier (LNA)
- RF gain stages
- Buffer amplifiers
- Oscillators
- Active mixers
Procurement Notes
Verify the ordering suffix to confirm the specific reel quantity and lead-free status. The -TR1 suffix indicates a 7-inch tape-and-reel containing 3000 devices. Confirm that the 'G' suffix is appended if a lead-free option is required for the procurement order.
Selection Notes
Select this component when a general-purpose NPN transistor with excellent high-frequency performance is needed. It is particularly suitable for designs requiring a low noise figure around 900 MHz. Ensure the circuit design accommodates the specified bias voltages of 3, 5, or 8 volts for optimal performance.
Part Context
The AT-41533 shares the same die as the AT-41511 but uses a 3-lead SOT-23 package instead of the 4-lead SOT-143. Both are part of the AT-415 series fabricated using the same SAT process. The AT-41533 offers slightly lower associated gain compared to the AT-41511 due to package parasitics.
Replacement Considerations
The AT-41511 is the direct pin-compatible alternative using the SOT-143 package. Other low-noise RF transistors may require schematic redesigns due to differing pinouts or electrical characteristics.
FAQ
What is the maximum collector current?
The absolute maximum rating for collector current is 50 mA.
Is the AT-41533 available in a lead-free version?
Yes, a lead-free option is available by adding the 'G' suffix to the part number, such as AT-41533-TR1G.
What is the typical noise figure at 2.4 GHz?
At 2.4 GHz with VCE = 5 V and IC = 5 mA, the typical noise figure is 1.6 dB.
