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NXP Semiconductors BB189,315
- Part No.:
- BB189,315
- Manufacturer:
- NXP Semiconductors
- Package:
- SC-79, SOD-523
- Datasheet:
-
BB189,315.pdf
- Description:
- DIODE UHF VAR CAP 32V SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:9,447
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Product details
Overview
BB189 from NXP Semiconductors is a planar technology variable capacitance diode (varactor) in an ultra-small SOD523 (SC-79) surface-mount package, designed for UHF tuning applications. It delivers Cd(2V) = 14.15–15.75 pF, Cd(25V) = 1.89–2.18 pF, Cd(2V)/Cd(25V) ≥ 6.3, series resistance rs = 0.6–0.7 Ω at 470 MHz, and capacitance matching ≤ 1.8 % via Direct Matching Assembly (DMA).
For engineers reviewing the BB189 datasheet, BB189 pinout, BB189 application, or BB189 equivalent, this varactor is selected for high-linearity, low-loss UHF voltage-controlled oscillators and electronic tuners where tight capacitance tracking and minimal parasitic resistance are critical to phase noise and tuning range performance.
Technical Context
The BB189 operates as a reverse-biased junction varactor with capacitance controlled by applied DC voltage across its anode–cathode terminals. Its planar silicon structure enables stable, repeatable C–V characteristics from 0 °C to +85 °C, with temperature coefficient of capacitance (TCCd) specified across reverse voltage range.
It is characterized at 1 MHz for capacitance and 470 MHz for series resistance, supporting UHF band operation up to ~1 GHz. The device complies with IEC 60134 absolute maximum ratings, including VR = 32 V, IF = 20 mA, and Tj = –55 °C to +125 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cd(2V) | 14.15–15.75 pF - sets minimum oscillator capacitance and defines lower tuning limit in VCO designs |
| Cd(25V) | 1.89–2.18 pF - establishes maximum tuning ratio and upper frequency boundary |
| Cd(2V)/Cd(25V) | ≥6.3 - ensures ≥6.3:1 tuning range for broadband UHF oscillator coverage |
| rs | 0.6–0.7 Ω at 470 MHz - minimizes insertion loss and Q degradation in resonant tank circuits |
| Capacitance matching | ≤1.8 % over 2–25 V (gliding DMA) - enables precise multi-varactor array tuning without calibration |
| Reverse voltage (VR) | 32 V max - supports robust bias headroom in high-dynamic-range tuner front-ends |
| Reverse current (IR) | ≤10 nA at VR = 30 V, 25 °C - reduces leakage-induced frequency drift in precision VCOs |
Pinout & Package
SOD523 (SC-79) is a 2-terminal, ultra-compact, leadless plastic surface-mount package measuring 1.25 × 0.85 × 0.65 mm (L × W × H), with cathode indicated by a marking bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to DC bias supply (reverse bias); polarity must be observed to avoid forward conduction |
| 2 | Anode | Connected to RF signal path or tank circuit node; forms variable capacitor with cathode |
Key Features
| Feature | Design Value |
|---|---|
| Excellent linearity | C–V curve optimized for minimal harmonic distortion in wide-tuning-range VCOs |
| Capacitance matching ≤1.8 % | Enables factory-matched varactor pairs for differential or push–pull tuning topologies |
| Ultra-small SOD523 package | Reduces board area and parasitic inductance for UHF layout integrity |
| Low series resistance (0.6–0.7 Ω) | Maintains high tank Q (>100 at 470 MHz), directly improving VCO phase noise |
Applications
| Voltage-Controlled Oscillator (VCO) | UHF Television Tuner |
|---|---|
Use Scenario: Used in LC-tank based VCOs for wireless transceivers operating in 400–900 MHz bands. IC Role / Device Role / Timing Role: Varactor providing voltage-dependent capacitance to tune oscillation frequency. Use Value: 6.3:1 tuning ratio and ≤1.8 % matching enable ±15 % frequency deviation with <0.5 % center-frequency drift across temperature. | Use Scenario: Integrated into RF front-end filter and local oscillator tuning stages of analog/digital TV tuners. IC Role / Device Role / Timing Role: Electronic tuning element replacing mechanical variable capacitors in UHF band (300–3000 MHz) signal selection. Use Value: Low rs and stable C–V behavior ensure consistent channel selectivity and image rejection across broadcast signal strengths. |
| FM Radio Tuning Circuit | Phase-Locked Loop (PLL) Reference Divider |
Use Scenario: Employed in low-cost portable FM radio receivers for antenna and IF stage tuning. IC Role / Device Role / Timing Role: Voltage-variable capacitor adjusting resonance in LC filters and oscillator tanks. Use Value: SOD523 footprint allows miniaturization while maintaining >60 dB adjacent-channel rejection under battery-voltage variation. | Use Scenario: Embedded in fractional-N PLL synthesizers for fine-resolution frequency stepping in communication ICs. IC Role / Device Role / Timing Role: Tuning element in loop filter or VCO core to stabilize reference division ratio against process/temperature drift. Use Value: Tight capacitance matching ensures predictable loop bandwidth and lock-time consistency across production lots. |
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(2V) = 12.5–14.5 pF; Cd(25V) = 2.0–2.4 pF; Cd(2V)/Cd(25V) ≥ 5.2; rs = 0.8 Ω | Narrower tuning ratio and higher series resistance reduce VCO tuning range and phase noise margin | Acceptable for cost-sensitive UHF tuners where 5.2:1 ratio suffices and layout allows slightly higher rs impact |
| SMV1232-011 | Cd(2V) = 15.5–17.5 pF; Cd(25V) = 2.2–2.6 pF; Cd(2V)/Cd(25V) ≥ 6.0; rs = 0.55 Ω; SOD-323 package | Larger SOD-323 footprint (1.7 × 1.3 mm) requires PCB redesign; marginally lower matching (≤2.5 %) | Preferred when lower rs is prioritized and board space permits larger package; not drop-in compatible |
Compared with BBY52,115 and SMV1232-011, the BB189 offers superior capacitance ratio and tighter matching in the smallest available footprint, making it optimal for space-constrained, high-performance UHF VCOs where tuning linearity and thermal stability are design-critical.
Availability
BB189 is available at Aetrix Electronics and suitable for UHF television tuners, voltage-controlled oscillators, FM radio front-ends, and PLL-based frequency synthesizers requiring stable component supply and traceable sourcing.
Supply support for BB189 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 BB189 belongs to NXP's RF varactor diode product line, engineered specifically for high-linearity, low-parasitic UHF tuning in broadcast and wireless infrastructure systems.
FAQ
What is the reverse voltage rating for BB189?
The BB189 has a maximum reverse voltage (VR) rating of 32 V per IEC 60134 Absolute Maximum Ratings. This allows safe operation with common 24 V bias supplies in UHF tuner modules. Exceeding 32 V risks permanent junction damage. The BB189 is rated for continuous reverse bias only; forward conduction must be avoided to preserve varactor function and reliability.
How is capacitance matching achieved in BB189?
Capacitance matching in the BB189 is achieved through a two-stage process: gliding matching across sequential diodes followed by Direct Matching Assembly (DMA). This yields ≤1.8 % ∆Cd/Cd variation over the 2–25 V range, enabling matched-pair use in differential VCOs without post-assembly calibration. The BB189's matching specification is verified per batch and documented in NXP's production test reports.
What package type does BB189 use and what are its dimensions?
The BB189 uses the SOD523 (also designated SC-79) surface-mount package - a 2-terminal, leadless plastic package measuring 1.25 × 0.85 × 0.65 mm (L × W × H). The cathode is marked by a visible bar on the top surface. This ultra-compact footprint minimizes parasitic inductance and saves PCB area, making the BB189 ideal for dense UHF RF layouts.
What is the typical series resistance of BB189 and why does it matter?
The BB189 exhibits a typical series resistance (rs) of 0.6–0.7 Ω measured at 470 MHz with Cd = 9 pF. This low rs preserves high Q-factor in resonant tank circuits, directly reducing phase noise in VCOs and improving selectivity in tunable filters. Higher rs values would degrade oscillator spectral purity and increase insertion loss - a key reason the BB189 is specified for demanding UHF applications.
Can BB189 be used in automotive-grade designs?
The BB189 is qualified for operation from –55 °C to +125 °C junction temperature and meets IEC 60134 limiting values, but it is not AEC-Q200 qualified. For automotive applications requiring qualification, designers should consult NXP's AEC-Q200-compliant varactor portfolio. The BB189 remains suitable for industrial and consumer UHF systems where extended temperature operation is needed but formal automotive certification is not mandated.
BB189,315 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:
- 2.18pF @ 25V, 1MHz
- Capacitance Ratio:
- 6.3
- Capacitance Ratio Condition:
- C2/C25
- 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:
- SOD-523
BB189,315 FAQ
1.How can I place an order for BB189,315 through Aetrix?
Please submit a Request for Quotation (RFQ) for BB189,315 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 BB189,315 reliable?
The price and inventory of BB189,315 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BB189,315 is usually 5 days.
3.What payment methods are accepted for BB189,315?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BB189,315 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BB189,315?
BB189,315 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BB189,315 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 BB189,315?
For technical support, including BB189,315 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BB189,315 requirements.
6.How does Aetrix verify that BB189,315 is sourced from the original manufacturer or authorized distributors?
All BB189,315 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 BB189,315 meets industry standards.
7.What is the process for return or replacement of BB189,315?
All BB189,315 units undergo pre-shipment inspection (PSI). If there is an issue with BB189,315, 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 BB189,315 part is unused and in its original packaging.
Return procedure for BB189,315:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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