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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

onsemi 2SC5490-TL-E

Name: 2SC5490-TL-E
Brand: onsemi
SKU: 2SC5490-TL-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SC5490-TL-E

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: -

Datasheet:: 2SC5490-TL-E.pdf

Description:: BIP NPN 30MA 10V FT=8G

Quantity:: RFQ Add To RFQ list

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Inventory:72,000

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Product details

Overview

2SC5490-TL-E from onsemi is an NPN RF transistor optimized for low-noise, high-frequency amplification in 1–2 GHz wireless front-ends, featuring f_T = 8 GHz typ, V_CEO = 10 V, I_C = 30 mA, and NF = 0.9 dB typ at 1 GHz. It operates at low voltage (V_CE = 1 V) and delivers |S₂₁|² = 10 dB typ at 1.5 GHz under standard bias.

For engineers reviewing the 2SC5490-TL-E datasheet, pinout, applications, or equivalent options, this page provides verified package mapping (SSFP/SC-81), confirmed noise performance, gain-bandwidth behavior across bias conditions, and validated alternatives for legacy design support and obsolescence mitigation.

Technical Context

This device employs a planar epitaxial NPN structure with gold-metallized emitter bonding, enabling stable high-frequency operation up to 2 GHz in common-emitter configuration. Its ultrasmall SSFP package (1.4 mm × 0.8 mm × 0.6 mm) minimizes parasitic inductance and capacitance, supporting broadband S-parameter performance including |S₂₁| = 16.5 dB at 200 MHz (V_CE = 5 V, I_C = 10 mA).

Low-noise operation is achieved via optimized base doping and thin base width, yielding NF = 1.4 dB typ at 1.5 GHz (V_CE = 5 V, I_C = 5 mA) and Cre = 0.3 pF max. The transistor supports dual-bias optimization: high-gain mode (V_CE = 5 V, I_C = 10 mA) and ultra-low-power mode (V_CE = 1 V, I_C = 1 mA, f_T = 3.5 GHz typ).

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	10 V - Maximum collector-emitter voltage before breakdown; sets safe operating range for 3.3 V and 5 V RF amplifier stages.
f_T	8 GHz typ (V_CE = 5 V, I_C = 10 mA) - Gain-bandwidth product confirming suitability for L-band and lower S-band amplification.
NF	0.9 dB typ at 1 GHz (V_CE = 2 V, I_C = 3 mA) - Enables high-sensitivity receiver front-ends in GPS, ISM, and Bluetooth modules.
\|S₂₁\|²	10 dB typ at 1.5 GHz (V_CE = 5 V, I_C = 10 mA) - Delivers usable small-signal power gain without external matching complexity.
C_ob	0.45–0.7 pF (V_CB = 10 V, f = 1 MHz) - Low output capacitance reduces Miller effect and eases impedance matching above 1 GHz.
h_FE	90–200 (V_CE = 5 V, I_C = 10 mA) - Supports stable DC biasing and temperature-compensated current mirror designs.
P_C	100 mW - Thermal limit compatible with passive PCB heat dissipation in compact RF modules.

Pinout & Package

2SC5490-TL-E uses the SSFP (Small Slim Flat-lead Package), standardized as JEITA SC-81 and JEDEC SOT-323 variant, with 1.4 mm × 0.8 mm footprint and 0.6 mm height. This halogen-free, Pb-free package enables high-density RF layout and automated reflow assembly.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control electrode for forward-active bias; requires series resistor for stability in narrowband amplifiers.
2	Emitter	Common reference node; must be low-inductance grounded for optimal NF and S-parameter repeatability.
3	Collector	RF output node; connects to matching network or next-stage input; sensitive to trace inductance above 500 MHz.

Key Features

Feature	Design Value
Low-noise amplification	NF = 0.9 dB typ at 1 GHz enables sub-2 dB system noise figure in GPS L1-band receivers.
Ultrasmall flat-lead package	1.4 mm × 0.8 mm × 0.6 mm footprint reduces parasitic coupling and supports <1.5 mm pitch RF routing.
High f_T with low-voltage operation	f_T = 3.5 GHz typ at V_CE = 1 V / I_C = 1 mA allows battery-powered IoT transceivers to maintain gain at 1.8 V supply.
Halogen-free construction	Complies with IEC 61249-2-21 and JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) for lead-free reflow.
ESD immunity	Machine Model ESD rating < 200 V mandates handling with grounded wrist straps and static-dissipative work surfaces.

Applications

GPS L1-Band LNA	ISM Band 2.4 GHz Transmitter Driver
Use Scenario: Front-end low-noise amplifier in compact GPS modules for automotive navigation and asset tracking. IC Role / Device Role / Timing Role: NPN RF transistor configured as common-emitter amplifier with 50 Ω input/output matching. Use Value: NF = 0.9 dB typ at 1 GHz directly contributes to improved C/N₀ ratio and faster TTFF (Time-To-First-Fix) under weak-signal conditions.	Use Scenario: Final-stage driver in 2.4 GHz ISM-band transmitters for wireless sensors and remote controls. IC Role / Device Role / Timing Role: Class-A linear amplifier delivering 10 dB small-signal gain before PA stage. Use Value: \|S₂₁\|² = 10 dB typ at 1.5 GHz ensures sufficient drive level while maintaining harmonic suppression per FCC Part 15.247.
Bluetooth LE Receiver IF Amplifier	UWB Pulse Amplifier Stage
Use Scenario: Intermediate-frequency amplifier in Bluetooth 5.0 receivers operating at 2 MHz IF after quadrature downconversion. IC Role / Device Role / Timing Role: High-h_FE (90–200) NPN transistor used in cascode or degenerated CE topology. Use Value: h_FE stability over temperature enables consistent gain control without active bias compensation circuitry.	Use Scenario: Pulse-amplifying stage in 3.1–4.8 GHz UWB systems for radar-based presence detection. IC Role / Device Role / Timing Role: Fast-switching NPN transistor biased in forward-active region for nanosecond rise-time pulse shaping. Use Value: f_T = 8 GHz typ supports ≤300 ps rise time, meeting IEEE 802.15.4a pulse fidelity requirements.

GPS L1-Band LNA

ISM Band 2.4 GHz Transmitter Driver

Use Scenario: Front-end low-noise amplifier in compact GPS modules for automotive navigation and asset tracking.

IC Role / Device Role / Timing Role: NPN RF transistor configured as common-emitter amplifier with 50 Ω input/output matching.

Use Value: NF = 0.9 dB typ at 1 GHz directly contributes to improved C/N₀ ratio and faster TTFF (Time-To-First-Fix) under weak-signal conditions.

Use Scenario: Final-stage driver in 2.4 GHz ISM-band transmitters for wireless sensors and remote controls.

IC Role / Device Role / Timing Role: Class-A linear amplifier delivering 10 dB small-signal gain before PA stage.

Use Value: |S₂₁|² = 10 dB typ at 1.5 GHz ensures sufficient drive level while maintaining harmonic suppression per FCC Part 15.247.

Bluetooth LE Receiver IF Amplifier

UWB Pulse Amplifier Stage

Use Scenario: Intermediate-frequency amplifier in Bluetooth 5.0 receivers operating at 2 MHz IF after quadrature downconversion.

IC Role / Device Role / Timing Role: High-h_FE (90–200) NPN transistor used in cascode or degenerated CE topology.

Use Value: h_FE stability over temperature enables consistent gain control without active bias compensation circuitry.

Use Scenario: Pulse-amplifying stage in 3.1–4.8 GHz UWB systems for radar-based presence detection.

IC Role / Device Role / Timing Role: Fast-switching NPN transistor biased in forward-active region for nanosecond rise-time pulse shaping.

Use Value: f_T = 8 GHz typ supports ≤300 ps rise time, meeting IEEE 802.15.4a pulse fidelity requirements.

Equivalent & Alternatives

The following parts are listed as comparable options for similar RF transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
NE68133	f_T = 7 GHz typ, NF = 1.2 dB typ at 1 GHz, same SC-81 package but higher V_CEO = 12 V.	Better voltage headroom for 5 V systems; slightly higher noise limits use in ultra-low-SNR GPS.	Preferred when designing for 5 V supply rails and moderate noise floor tolerance.
MCH4010	f_T = 9 GHz typ, NF = 0.8 dB typ at 1 GHz, same SSFP package but rated for I_C = 40 mA and P_C = 150 mW.	Higher power handling enables higher output swing in driver stages; tighter NF spec improves weak-signal reception.	Recommended for new designs requiring extended frequency margin or improved thermal robustness.

Compared with 2SC5490-TL-E, NE68133 offers higher voltage tolerance but marginally higher noise, while MCH4010 delivers superior f_T and NF at increased power capability-both require validation of bias network stability due to differing S-parameter phase response.

Availability

2SC5490-TL-E is available at Aetrix Electronics and suitable for GPS module manufacturing, ISM-band transmitter development, and Bluetooth LE receiver design requiring stable component supply amid industrial obsolescence transitions.

Supply support for 2SC5490-TL-E includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient silicon and SiC solutions for automotive, industrial, cloud, and IoT applications.

The 2SC5490-TL-E belongs to onsemi's RF bipolar transistor family engineered for low-noise, high-frequency amplification in portable wireless infrastructure and consumer RF front-ends.

FAQ

What is the maximum operating frequency supported by the 2SC5490-TL-E?

The 2SC5490-TL-E has a typical gain-bandwidth product (f_T) of 8 GHz at V_CE = 5 V and I_C = 10 mA, indicating effective small-signal amplification up to ~2 GHz in practical common-emitter configurations. Measured |S₂₁| remains >3 dB through 2 GHz under standard bias, confirming usability in L-band and lower S-band applications.

Is the 2SC5490-TL-E pin-compatible with other SC-81 transistors like the MCH4010?

No documented pin-to-pin compatibility exists between the 2SC5490-TL-E and MCH4010. Although both use SC-81 (SSFP) packages with identical 3-pin terminal assignment (1=Base, 2=Emitter, 3=Collector), differences in internal doping profiles and S-parameter phase response require full circuit revalidation-including stability analysis and matching network adjustment-before substitution.

What is the recommended bias condition for lowest noise figure in the 2SC5490-TL-E?

The lowest published noise figure for the 2SC5490-TL-E is 0.9 dB typ at 1 GHz, achieved under V_CE = 2 V and I_C = 3 mA. This condition balances base resistance contribution and shot noise, and requires careful emitter degeneration and base bias network design to maintain stability across temperature.

Does the 2SC5490-TL-E meet RoHS and halogen-free compliance standards?

Yes, the 2SC5490-TL-E is explicitly marked halogen-free and Pb-free in its official ordering information and package documentation. It complies with JEDEC JS709E and IEC 61249-2-21 requirements, and carries MSL1 rating per J-STD-020 for lead-free reflow compatibility.

Why is the 2SC5490-TL-E marked "Not Recommended for New Design"?

onsemi discontinued the 2SC5490-TL-E and issued a "Not Recommended for New Design" notice due to process migration and portfolio rationalization. While existing inventory remains functional and supported, long-term supply continuity is not guaranteed; Aetrix Electronics provides last-time-buy planning and drop-in alternative evaluation for legacy program sustainment.

2SC5490-TL-E Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Transistor Type:: -

Current - Collector (Ic) (Max):: -

Voltage - Collector Emitter Breakdown (Max):: -

Vce Saturation (Max) @ Ib, Ic:: -

Current - Collector Cutoff (Max):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: -

Power - Max:: -

Frequency - Transition:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

2SC5490-TL-E FAQ

1.How can I place an order for 2SC5490-TL-E through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SC5490-TL-E on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 2SC5490-TL-E reliable?

The price and inventory of 2SC5490-TL-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SC5490-TL-E is usually 5 days.

3.What payment methods are accepted for 2SC5490-TL-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SC5490-TL-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SC5490-TL-E?

2SC5490-TL-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SC5490-TL-E order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 2SC5490-TL-E?

For technical support, including 2SC5490-TL-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SC5490-TL-E requirements.

6.How does Aetrix verify that 2SC5490-TL-E is sourced from the original manufacturer or authorized distributors?

All 2SC5490-TL-E products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 2SC5490-TL-E meets industry standards.

7.What is the process for return or replacement of 2SC5490-TL-E?

All 2SC5490-TL-E units undergo pre-shipment inspection (PSI). If there is an issue with 2SC5490-TL-E, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 2SC5490-TL-E part is unused and in its original packaging.

Return procedure for 2SC5490-TL-E:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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