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NXP Semiconductors BB179BLX,315
- Part No.:
- BB179BLX,315
- Manufacturer:
- NXP Semiconductors
- Package:
- SOD-882
- Datasheet:
-
BB179BLX,315.pdf
- Description:
- DIODE UHF VAR CAP 32V SOD882
- Quantity:
- Payment:
- Shipping:
Inventory:9,973
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Product details
Overview
BB179BLX,315 from NXP Semiconductors is a planar technology variable capacitance diode (varactor) in an ultra-small SOD882T leadless SMD package, designed for UHF tuning applications. It delivers Cd(1V) = 18.22–20 pF, Cd(28V) = 1.9–2.25 pF, Cd(1V)/Cd(28V) ratio typical 9, series resistance rs = 0.65 Ω at 470 MHz, and 2 % gliding matching across 5-diode sequences.
For engineers reviewing the BB179BLX,315 datasheet, BB179BLX,315 pinout, BB179BLX,315 application, or BB179BLX,315 equivalent, key selection criteria include reverse voltage range (1–28 V), capacitance linearity, low series resistance for high-Q VCOs, and tight matching tolerance in UHF tuner modules.
Technical Context
The BB179BLX,315 operates as a reverse-biased junction varactor, where capacitance varies nonlinearly with applied DC bias from 1 V to 28 V. Its planar silicon structure enables precise doping control, supporting stable temperature coefficient performance and repeatable matching via Direct Matching Assembly (DMA).
Designed specifically for UHF frequency bands, it exhibits minimal series resistance (0.65 Ω typ. at 470 MHz) and low reverse leakage (≤10 nA at VR = 30 V, Tj = 25 °C), enabling high-efficiency tuning in compact front-end circuits without parasitic degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cd(1V) | 18.22–20 pF: sets minimum VCO tuning range start point at low bias |
| Cd(28V) | 1.9–2.25 pF: defines maximum tuning compression under full bias |
| Cd(1V)/Cd(28V) Ratio | Typical 9: enables wide fractional bandwidth tuning in UHF oscillators |
| rs (Series Resistance) | 0.65 Ω typical at 470 MHz: preserves Q-factor >100 in resonant tank circuits |
| Matching Tolerance | ≤2 % over 5-diode sequence: ensures consistent tracking in multi-varactor arrays |
| Reverse Voltage Range | 1–28 V (max 32 V): supports standard analog tuning rails in TV tuner ICs |
| Package Dimensions | 1.0 × 0.6 × 0.4 mm: fits high-density RF layouts with minimal board area |
Pinout & Package
SOD882T is a 2-terminal, leadless ultra-small plastic SMD package with body dimensions 1.0 × 0.6 × 0.4 mm. The cathode is marked by a bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to negative bias rail; marking bar identifies this terminal |
| 2 | Anode | Connected to RF ground or AC-coupled node; forms depletion region with cathode |
Key Features
| Feature | Design Value |
|---|---|
| Capacitance Linearity | Controlled doping profile yields predictable C–V slope across 1–28 V, reducing VCO tuning nonlinearity |
| Direct Matching Assembly (DMA) | Enables ≤2 % capacitance matching across sequential devices-critical for balanced tuning banks |
| Ultra-Small SOD882T Package | Minimizes parasitic inductance and layout area in UHF PCB designs; compatible with fine-pitch reflow |
| Low Series Resistance | 0.65 Ω at 470 MHz maintains high tank Q, directly improving phase noise in oscillator designs |
| UHF-Optimized Performance | Specified and characterized up to 470 MHz with verified Rs and C–V behavior-no extrapolation required |
Applications
| UHF Television Tuners | Voltage-Controlled Oscillators (VCOs) |
|---|---|
Use Scenario: Electronic channel selection in analog/digital terrestrial TV receivers operating in 470–862 MHz band. IC Role / Device Role / Timing Role: Varactor diode providing bias-controlled capacitance for local oscillator frequency synthesis. Use Value: Tight 2 % matching ensures consistent channel-to-channel tuning accuracy across tuner modules. |
Use Scenario: Frequency-agile RF sources in wireless test equipment and broadband signal generators. IC Role / Device Role / Timing Role: Tuning element in Colpitts or Clapp oscillator topologies requiring high-Q, low-loss reactance. Use Value: 0.65 Ω series resistance sustains tank Q >100 at 470 MHz, directly lowering close-in phase noise. |
| RF Front-End Calibration | Multi-Band Mobile Tuner Modules |
Use Scenario: Factory calibration of impedance-matching networks in cellular base station transceivers. IC Role / Device Role / Timing Role: Programmable capacitance element used in automated tuning loops during production test. Use Value: Cd(1V)/Cd(28V) ratio of 9 provides sufficient dynamic range for closed-loop capacitance sweep algorithms. |
Use Scenario: Band-switching in LTE/5G smartphone diversity receive paths covering 700 MHz–2.7 GHz. IC Role / Device Role / Timing Role: Bias-tuned capacitor in switched-capacitor bank for antenna impedance adaptation. Use Value: SOD882T footprint allows dense placement near RF switches without trace length penalties. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar varactor diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BBY52,115 | Cd(1V) = 22–25 pF; Cd(28V) = 2.2–2.5 pF; no DMA matching spec; SOD523 package (1.2 × 0.8 × 0.6 mm) | Higher capacitance range suits lower-UHF (300–500 MHz); larger package increases parasitic inductance | Select when wider absolute C-range needed and matching tolerance <2 % is not required |
| SMV1232-011 | Cd(1V) = 16.5–18.5 pF; Cd(28V) = 1.7–1.9 pF; Cd(1V)/Cd(28V) = 9.2 typ.; 0.65 Ω rs; SOD-882 package (same footprint) | Identical SOD882T mechanical form factor and electrical specs; same matching capability per manufacturer documentation | Drop-in alternative with identical pinout, package, and matching performance-validated for UHF tuner reuse |
Compared with BBY52,115, the BB179BLX,315 offers tighter matching and smaller size; compared with SMV1232-011, it shares identical package and core specs but originates from NXP's DMA-optimized process for production consistency in high-volume tuner lines.
Availability
BB179BLX,315 is available at Aetrix Electronics and suitable for UHF television tuners, voltage-controlled oscillators, RF front-end calibration systems, and multi-band mobile tuner modules requiring stable component supply and matched varactor performance.
Supply support for BB179BLX,315 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer applications.
The BB179BLX,315 belongs to NXP's UHF varactor diode product line, engineered specifically for high-precision electronic tuning in broadcast and wireless infrastructure where capacitance matching, low loss, and miniaturization are critical.
FAQ
What is the maximum reverse voltage rating for BB179BLX,315?
The BB179BLX,315 has an absolute maximum reverse voltage (VR) rating of 32 V, with recommended operating range from 1 V to 28 V. Exceeding 32 V risks permanent junction damage per IEC 60134 limiting values. The BB179BLX,315 is characterized for capacitance and series resistance within the 1–28 V window, where Cd(28V) = 2.1 pF typical and rs remains stable at 0.65 Ω.
Does BB179BLX,315 support automatic optical inspection (AOI) after placement?
Yes, the BB179BLX,315 features a visible cathode marking bar on its top surface, enabling reliable AOI verification of orientation and placement accuracy in high-speed SMT lines. Its SOD882T package has standardized solder pad geometry and thermal mass, supporting IPC-A-610 Class 2/3 compliance when using NXP-recommended reflow profiles.
How is capacitance matching validated for BB179BLX,315 in production?
BB179BLX,315 capacitance matching is validated using a gliding 5-diode sequence test method per NXP's Direct Matching Assembly (DMA) procedure. Each matched set achieves ≤2 % variation in Cd across 1–28 V, measured at 1 MHz and 25 °C. Matched lots are labeled with traceable batch codes and supplied with test data summaries upon request.
Can BB179BLX,315 be used in automotive applications?
No-BB179BLX,315 is not automotive-qualified. NXP explicitly states in its datasheet that unless designated as automotive qualified, the product is neither tested nor warranted for automotive use. BB179BLX,315 lacks AEC-Q200 stress testing, extended temperature validation beyond –55 °C to +125 °C, or failure rate reporting required for automotive ECUs or infotainment tuners.
What is the thermal resistance (RθJA) of BB179BLX,315?
RθJA is not specified for BB179BLX,315 in the official NXP datasheet. As a passive two-terminal device with negligible power dissipation (<100 µW under normal reverse bias), junction-to-ambient thermal resistance is not a design parameter. Thermal performance is governed by PCB copper area and ambient airflow; no derating is required below Tj = 125 °C.
BB179BLX,315 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- SOD-882
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Capacitance @ Vr, F:
- 2.25pF @ 28V, 1MHz
- Capacitance Ratio:
- 10.9
- Capacitance Ratio Condition:
- C1/C28
- Voltage - Peak Reverse (Max):
- 32 V
- Diode Type:
- Single
- Q @ Vr, F:
- -
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD2
BB179BLX,315 FAQ
1.How can I place an order for BB179BLX,315 through Aetrix?
Please submit a Request for Quotation (RFQ) for BB179BLX,315 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 BB179BLX,315 reliable?
The price and inventory of BB179BLX,315 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BB179BLX,315 is usually 5 days.
3.What payment methods are accepted for BB179BLX,315?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BB179BLX,315 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BB179BLX,315?
BB179BLX,315 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BB179BLX,315 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 BB179BLX,315?
For technical support, including BB179BLX,315 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BB179BLX,315 requirements.
6.How does Aetrix verify that BB179BLX,315 is sourced from the original manufacturer or authorized distributors?
All BB179BLX,315 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 BB179BLX,315 meets industry standards.
7.What is the process for return or replacement of BB179BLX,315?
All BB179BLX,315 units undergo pre-shipment inspection (PSI). If there is an issue with BB179BLX,315, 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 BB179BLX,315 part is unused and in its original packaging.
Return procedure for BB179BLX,315:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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