My Inquiry
My Account
NXP Semiconductors BB179,335
- Part No.:
- BB179,335
- Manufacturer:
- NXP Semiconductors
- Package:
- SC-79, SOD-523
- Datasheet:
-
BB179,335.pdf
- Description:
- DIODE UHF VAR CAP 30V SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:4,085
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BB179,335 from NXP Semiconductors is a planar variable capacitance diode (varactor) in SOD523 (SC-79) ultra-small SMD package, designed for UHF tuning applications. It delivers Cd(1V) = 19.7 pF (typ), Cd(28V) = 2.1 pF (typ), capacitance ratio Cd(1V)/Cd(28V) = 9 (typ), series resistance rs = 0.6–0.75 Ω at 470 MHz, and 2% gliding matching accuracy via Direct Matching Assembly (DMA).
For engineers reviewing the BB179,335 datasheet, BB179,335 pinout, BB179,335 application, or BB179,335 equivalent, key selection criteria include reverse voltage range (0–30 V), low series resistance for high-Q VCOs, tight capacitance matching across diode pairs, and thermal stability of capacitance over −55 °C to +125 °C junction temperature.
Technical Context
The BB179,335 operates as a voltage-controlled capacitor in reverse-biased mode, with capacitance varying from 19.7 pF at 1 V to 2.1 pF at 28 V. Its planar silicon structure enables precise doping gradients for linear C–V response and stable temperature coefficient.
Designed for UHF band tuning, it supports operation up to 470 MHz with rs ≤ 0.75 Ω and IR ≤ 10 nA at VR = 30 V and Tj = 25 °C. The DMA process ensures matched capacitance variation across sequences of 10 diodes, critical for balanced VCO tank circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cd(1V) | 19.7 pF typical - sets minimum tank capacitance for UHF oscillator center frequency |
| Cd(28V) | 2.1 pF typical - defines maximum tuning range endpoint in VCO designs |
| Cd(1V)/Cd(28V) ratio | 9:1 typical - enables >1.5-octave frequency tuning range in resonant circuits |
| rs @ 470 MHz | 0.6–0.75 Ω - maintains high Q-factor (>100 at 470 MHz) for low-phase-noise oscillators |
| Reverse voltage range | 0–30 V - compatible with standard analog tuning voltage rails and DAC outputs |
| Capacitance matching | ≤2% over 10-diode sequence - ensures amplitude and phase balance in differential VCO topologies |
| IR @ VR=30 V, Tj=25°C | ≤10 nA - minimizes leakage-induced tuning drift and power loss in battery-powered tuners |
Pinout & Package
SOD523 (SC-79) ultra-small plastic surface-mount package: 1.25 × 0.85 × 0.58 mm body, 2-terminal configuration, cathode marked by bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to higher-potential node in reverse-biased varactor configuration; marking bar identifies this terminal |
| 2 | Anode | Connected to lower-potential node (e.g., RF ground or bias return); forms depletion region with cathode under reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| Excellent linearity | C–V curve optimized for minimal second-harmonic distortion in wide-tuning-range VCOs |
| 2% DMA matching | Enables direct substitution of matched diode pairs without individual calibration in production |
| Ultra-small SOD523 footprint | Reduces PCB area by >50% vs. SOD323; supports high-density RF module layouts |
| Low series resistance | Preserves loaded Q in LC tanks - critical for phase noise performance below −110 dBc/Hz @ 100 kHz offset |
| Stable C–V over temperature | TCd < ±100 ppm/K across 0–85 °C - limits center-frequency drift in ambient-varying environments |
Applications
| UHF Television Tuners | Voltage-Controlled Oscillators (VCOs) |
|---|---|
Use Scenario: Channel selection in terrestrial digital TV receivers operating in 470–862 MHz band. IC Role / Device Role / Timing Role: Varactor diode forming voltage-variable element of YIG- or LC-based tuning circuit. Use Value: 9:1 capacitance ratio enables full-band coverage with single VCO core; 2% matching ensures consistent channel lock time across units. |
Use Scenario: Local oscillator generation in RF transceivers for ISM-band wireless systems (e.g., 868/915 MHz). IC Role / Device Role / Timing Role: Tuning element in Colpitts or Clapp oscillator topology, controlled by PLL DAC output. Use Value: 0.65 Ω typical series resistance sustains Q > 120 at 900 MHz, directly improving phase noise by ≥3 dB versus higher-rs alternatives. |
| RF Front-End Calibration | Differential Tuning Modules |
Use Scenario: Factory calibration of antenna impedance matching networks in handheld radios. IC Role / Device Role / Timing Role: Adjustable shunt capacitance element in Pi-network tuner, adjusted via precision voltage ramp. Use Value: Tight 2% matching allows batch calibration using single reference voltage sweep, reducing test time by 40%. |
Use Scenario: Symmetric tuning in quadrature VCOs for zero-IF transmitters. IC Role / Device Role / Timing Role: Paired BB179,335 diodes placed in complementary legs of differential LC tank. Use Value: Gliding DMA matching ensures <0.5° phase skew across 100–900 MHz, preserving image rejection >45 dB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar varactor diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BBY52,315 | Cd(1V)=22 pF, Cd(28V)=2.5 pF, ratio=8.8; rs=0.8 Ω; SOD523 package | Higher capacitance baseline shifts VCO center frequency upward; slightly lower Q at UHF | Preferred when wider absolute tuning range needed at lower frequencies (e.g., VHF/UHF hybrid tuners) |
| SMV1232-011 | Cd(1V)=20.5 pF, Cd(28V)=2.3 pF, ratio=8.9; rs=0.55 Ω; SOD-323 package | Lower rs improves Q but larger SOD-323 footprint increases parasitic inductance in dense layouts | Selected for ultra-low-phase-noise VCOs where board space permits larger package |
Compared with BB179,335, BBY52,315 offers marginally higher baseline capacitance but reduced tuning ratio and Q, while SMV1232-011 achieves lower series resistance at the cost of larger footprint and no DMA matching - making BB179,335 optimal for space-constrained, production-calibrated UHF VCOs requiring matched pairs.
Availability
BB179,335 is available at Aetrix Electronics and suitable for UHF television tuners, voltage-controlled oscillators, RF front-end calibration systems, and differential tuning modules requiring stable component supply with tight parametric consistency across production lots.
Supply support for BB179,335 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 BB179,335 belongs to NXP's RF varactor diode product line, engineered specifically for high-linearity, high-matching UHF tuning in broadcast and wireless infrastructure - emphasizing manufacturability, thermal stability, and production-ready matching.
FAQ
What is the maximum reverse voltage rating for BB179,335?
The BB179,335 has an absolute maximum reverse voltage (VR) rating of 30 V and a peak reverse voltage (VRM) of 35 V when used with a 10 kΩ series resistor. Operation beyond 30 V DC reverse bias risks permanent junction damage per IEC 60134 limiting values. For reliable long-term use in VCOs, design within 28 V to maintain specified Cd(28V) = 2.1 pF and avoid accelerated aging.
How does the 2% DMA matching of BB179,335 benefit production VCO assembly?
The 2% DMA (Direct Matching Assembly) matching of BB179,335 ensures capacitance variation remains ≤2% across sequences of 10 diodes under identical bias conditions. This eliminates per-unit VCO trim during manufacturing, reduces test time, and guarantees consistent tuning slope and center frequency across batches - critical for high-volume UHF tuner modules where calibration cost must be minimized.
Can BB179,335 be used in differential VCO topologies?
Yes, BB179,335 is explicitly suited for differential VCOs due to its gliding matching capability and symmetric SOD523 package. When paired in complementary tank legs, matched BB179,335 diodes maintain phase coherence and suppress even-order harmonics. The 2% matching tolerance ensures <0.5° phase skew across 100–900 MHz, preserving image rejection in zero-IF architectures.
What is the typical series resistance of BB179,335 and why does it matter?
The BB179,335 exhibits a typical series resistance (rs) of 0.6–0.75 Ω measured at 470 MHz. This low rs directly determines the Q-factor of LC tank circuits: Q ≈ 1/(2πf·rs·C). At 900 MHz with Cd = 2.1 pF, rs = 0.65 Ω yields Q > 120 - essential for achieving phase noise below −110 dBc/Hz at 100 kHz offset in high-performance VCOs.
Is BB179,335 qualified for automotive applications?
No, BB179,335 is not automotive-qualified. Per NXP's legal disclaimers, it is neither tested nor warranted for automotive use, including AEC-Q200 stress testing or temperature cycling across −40 °C to +125 °C. Its specified junction temperature range is −55 °C to +125 °C, but reliability data and qualification reports for automotive environments are not provided. Use in automotive systems requires customer validation and assumes full liability.
BB179,335 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Capacitance @ Vr, F:
- 2.225pF @ 28V, 1MHz
- Capacitance Ratio:
- 10.9
- Capacitance Ratio Condition:
- C1/C28
- Voltage - Peak Reverse (Max):
- 30 V
- Diode Type:
- Single
- Q @ Vr, F:
- -
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BB179,335 FAQ
1.How can I place an order for BB179,335 through Aetrix?
Please submit a Request for Quotation (RFQ) for BB179,335 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 BB179,335 reliable?
The price and inventory of BB179,335 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BB179,335 is usually 5 days.
3.What payment methods are accepted for BB179,335?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BB179,335 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BB179,335?
BB179,335 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BB179,335 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 BB179,335?
For technical support, including BB179,335 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BB179,335 requirements.
6.How does Aetrix verify that BB179,335 is sourced from the original manufacturer or authorized distributors?
All BB179,335 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 BB179,335 meets industry standards.
7.What is the process for return or replacement of BB179,335?
All BB179,335 units undergo pre-shipment inspection (PSI). If there is an issue with BB179,335, 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 BB179,335 part is unused and in its original packaging.
Return procedure for BB179,335:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BB179,335 Tags
-
BBY5702VH6327XTSA1
Infineon Technologies
-
BBY5602VH6327XTSA1
Infineon Technologies
-
SMV1405-040LF
Skyworks Solutions Inc.
-
BBY6502VH6327XTSA1
Infineon Technologies
-
BBY6602VH6327XTSA1
Infineon Technologies
-
BBY5802VH6327XTSA1
Infineon Technologies
.jpg)
-
BB175X
NXP Semiconductors
-
SMV1430-040LF
Skyworks Solutions Inc.
-
SMV1273-079LF
Skyworks Solutions Inc.
-
SMV1255-079LF
Skyworks Solutions Inc.
-
SMV1213-079LF
Skyworks Solutions Inc.
-
SMV1247-079LF
Skyworks Solutions Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
