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NXP Semiconductors BB156,135
- Part No.:
- BB156,135
- Manufacturer:
- NXP Semiconductors
- Package:
- SC-76, SOD-323
- Datasheet:
-
BB156,135.pdf
- Description:
- DIODE VAR CAP 10V 20MA SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:4,563
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Product details
Overview
BB156,135 from NXP Semiconductors is a low-voltage variable capacitance diode (varactor) in SOD323 package, with typical capacitance of 4.8 pF at 7.5 V reverse bias, capacitance ratio Cd(1 V)/Cd(7.5 V) = 3.3, series resistance rs = 0.4 Ω at 470 MHz, and maximum reverse voltage VR = 10 V. It serves as tuning element in compact RF voltage-controlled oscillators.
For engineers reviewing the BB156,135 datasheet, BB156,135 pinout, BB156,135 application, or BB156,135 equivalent, key selection criteria include reverse voltage range, capacitance linearity across 1–7.5 V, low series resistance for high-Q VCO design, thermal stability of capacitance, and SOD323 footprint compatibility in space-constrained RF modules.
Technical Context
The BB156,135 operates exclusively under reverse bias, where its depletion-layer width-and thus junction capacitance-varies nonlinearly with applied voltage. Its planar silicon structure ensures stable temperature coefficient and reproducible C-V characteristics across production lots.
Designed for low-voltage tuning (≤7.5 V), it delivers optimized linearity between 1 V and 4 V reverse bias, enabling precise frequency pulling in narrowband VCOs. The 0.4 Ω typical series resistance at 470 MHz supports high resonator Q-factor when integrated with high-Q inductors and ceramic capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Capacitance @ 7.5 V | 4.8 pF typical - sets center frequency and tuning range in 800–2500 MHz VCO designs |
| Capacitance Ratio | 3.3 (1 V / 7.5 V) - enables ~50% relative frequency deviation in LC-tuned oscillators |
| Series Resistance rs | 0.4 Ω typical at 470 MHz - minimizes insertion loss and maintains oscillator phase noise performance |
| Max Reverse Voltage VR | 10 V - defines absolute tuning voltage ceiling and DC blocking capacitor rating requirement |
| Reverse Current IR | ≤10 nA at 10 V, 25 °C - ensures negligible leakage-induced drift in precision tuning circuits |
| Junction Temp Range | −55 °C to +125 °C - supports operation in industrial-grade RF front-ends and wireless sensor nodes |
Pinout & Package
BB156,135 is housed in a plastic surface-mounted SOD323 (SC-76) package measuring 1.8 × 1.35 × 0.9 mm, with cathode marked by a bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to higher-potential tuning voltage node; polarity must be observed to avoid forward conduction |
| 2 | Anode | Connected to RF ground or resonator low-impedance node; forms AC return path for tuning current |
Key Features
| Feature | Design Value |
|---|---|
| Excellent C-V linearity | Low curvature in 1–4 V range improves frequency vs. control-voltage monotonicity in PLL loop filters |
| Very low series resistance | 0.4 Ω typical at 470 MHz directly contributes to >1000 resonator Q when paired with 2.2 nH inductor |
| SOD323 ultra-small package | 1.8 × 1.35 mm footprint enables placement adjacent to IC pins in 2.4 GHz transceiver modules |
| Stable capacitance temperature coefficient | TCd ≈ −100 ppm/K near 4 V (per Fig.4) - reduces VCO drift over −40 to +85 °C ambient |
Applications
| Wireless Remote Keyless Entry (RKE) | ISM Band Sensor Transmitters |
|---|---|
Use Scenario: 315/433 MHz ASK/OOK transmitter module with integrated VCO for vehicle access fobs. IC Role / Device Role / Timing Role: Tuning element in Colpitts VCO core, adjusting output frequency within ±200 kHz tolerance. Use Value: 3.3 capacitance ratio and 4.8 pF @ 7.5 V enable full band coverage with single-inductor design and <1.5 kHz/V tuning sensitivity. | Use Scenario: Battery-powered 868 MHz telemetry node transmitting temperature/humidity data every 30 seconds. IC Role / Device Role / Timing Role: Voltage-controlled frequency adjuster in low-power LC oscillator driving OOK modulator. Use Value: 0.4 Ω series resistance preserves oscillator start-up margin at 1.8 V supply; SOD323 size fits 6 mm² PCB area budget. |
| Bluetooth LE Peripheral Clock Reference | UWB Impulse Radio Tuning |
Use Scenario: Low-cost BLE beacon using discrete VCO instead of crystal oscillator for cost-sensitive consumer wearables. IC Role / Device Role / Timing Role: Fine-frequency trim component in 2.4 GHz VCO, compensating for PCB trace inductance variation. Use Value: 14.4–17.6 pF @ 1 V allows coarse calibration; 4.2–5.4 pF @ 7.5 V enables final 20 ppm alignment without trimming capacitors. | Use Scenario: 3.1–4.8 GHz UWB pulse generator requiring sub-nanosecond timing jitter control. IC Role / Device Role / Timing Role: Capacitance-adjustable element in delay-line-based pulse shaper network. Use Value: Low rs and stable C-V slope minimize group delay distortion across 1.7 GHz bandwidth; SOD323 parasitic inductance <0.3 nH avoids resonance artifacts. |
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 | Higher capacitance (22 pF @ 1 V), lower ratio (2.5), rs = 0.6 Ω - optimized for lower-frequency VCOs (100–500 MHz) | Requires larger inductor values; less suitable for 2.4 GHz miniaturized layouts | Select BBY52,115 only when wider low-frequency tuning range is needed and board space permits larger matching components. |
| SMV1232-011 | Higher VR (15 V), tighter C tolerance (±5%), rs = 0.35 Ω - designed for cellular PA envelope tracking | Over-specified for simple VCO use; higher cost and longer lead time than BB156,135 | Choose SMV1232-011 only if system requires >10 V tuning range or MIL-STD-750 screening compliance. |
Compared with BBY52,115 and SMV1232-011, BB156,135 offers optimal balance of size, 7.5 V tuning headroom, and 3.3 ratio for compact 800–2500 MHz VCOs-making it preferred for cost-sensitive, space-constrained ISM and short-range wireless designs where 10 V absolute max rating suffices.
Availability
BB156,135 is available at Aetrix Electronics and suitable for wireless remote keyless entry (RKE), ISM-band sensor transmitters, and Bluetooth LE peripheral clock reference applications requiring stable component supply and consistent SOD323 packaging.
Supply support for BB156,135 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 delivering high-performance mixed-signal and standard products, with leadership in RF, analog, power management, and security technologies.
The BB156,135 belongs to NXP's discrete RF varactor family, engineered specifically for low-voltage, high-linearity tuning in compact wireless transceivers and frequency-agile sensor nodes.
FAQ
What is the maximum reverse voltage rating for BB156,135?
The BB156,135 has a maximum continuous reverse voltage (VR) rating of 10 V, as specified in the Absolute Maximum Ratings table. Operation beyond this voltage risks permanent junction damage. For reliable long-term tuning, NXP recommends limiting reverse bias to ≤7.5 V to maintain specified capacitance linearity and minimize leakage current drift. The BB156,135 must never be forward-biased during normal operation.
What is the typical capacitance value of BB156,135 at 1 V and 7.5 V reverse bias?
At 1 V reverse bias, BB156,135 exhibits a typical capacitance of 16 pF (range 14.4–17.6 pF); at 7.5 V, it measures 4.8 pF (range 4.2–5.4 pF). This yields a typical capacitance ratio of 3.3, defined as Cd(1 V)/Cd(7.5 V). These values are measured at 1 MHz and Tj = 25 °C per the official NXP datasheet, and form the basis for VCO frequency range calculations.
How does the series resistance of BB156,135 affect VCO phase noise performance?
The BB156,135 has a typical series resistance (rs) of 0.4 Ω at 470 MHz and Cd = 9 pF. Lower rs directly improves the quality factor (Q) of the resonant tank, reducing thermal noise contribution to close-in phase noise. In practice, this enables BB156,135-based VCOs to achieve −110 dBc/Hz at 100 kHz offset in 2.4 GHz designs-critical for Bluetooth LE and Zigbee coexistence.
Is BB156,135 suitable for automotive applications?
No, BB156,135 is not automotive-qualified. The NXP datasheet explicitly states that unless otherwise indicated, non-automotive qualified products like BB156,135 are not tested or warranted for automotive use. It lacks AEC-Q200 stress testing, extended temperature validation beyond +125 °C junction, and zero-defect manufacturing controls required for automotive ECUs or infotainment systems.
What does the marking code 'PF' indicate on BB156,135?
The marking code 'PF' laser-etched on the BB156,135 package identifies the device variant and manufacturing lot traceability per NXP's internal coding system. The bar adjacent to the marking denotes the cathode (Pin 1), confirming polarity orientation during placement. This marking is consistent across all BB156,135 units in SOD323 packaging and aligns with JEDEC SC-76 mechanical standards.
BB156,135 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Capacitance @ Vr, F:
- 5.4pF @ 7.5V, 1MHz
- Capacitance Ratio:
- 3.9
- Capacitance Ratio Condition:
- C1/C7.5
- Voltage - Peak Reverse (Max):
- 10 V
- Diode Type:
- Single
- Q @ Vr, F:
- -
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BB156,135 FAQ
1.How can I place an order for BB156,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BB156,135 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 BB156,135 reliable?
The price and inventory of BB156,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BB156,135 is usually 5 days.
3.What payment methods are accepted for BB156,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BB156,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BB156,135?
BB156,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BB156,135 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 BB156,135?
For technical support, including BB156,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BB156,135 requirements.
6.How does Aetrix verify that BB156,135 is sourced from the original manufacturer or authorized distributors?
All BB156,135 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 BB156,135 meets industry standards.
7.What is the process for return or replacement of BB156,135?
All BB156,135 units undergo pre-shipment inspection (PSI). If there is an issue with BB156,135, 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 BB156,135 part is unused and in its original packaging.
Return procedure for BB156,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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