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NXP Semiconductors BB156,115
- Part No.:
- BB156,115
- Manufacturer:
- NXP Semiconductors
- Package:
- SC-76, SOD-323
- Datasheet:
-
BB156,115.pdf
- Description:
- DIODE VAR CAP 10V 20MA SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:4,362
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Product details
Overview
BB156,115 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 a tuning element in compact RF voltage-controlled oscillators.
For engineers reviewing the BB156,115 datasheet, BB156,115 pinout, BB156,115 application, or BB156,115 equivalent, key selection factors include its linearity over 1–7.5 V bias range, ultra-low series resistance for high-Q resonant circuits, SOD323 footprint compatibility with space-constrained layouts, and temperature-stable capacitance behavior up to +125 °C junction temperature.
Technical Context
The BB156,115 employs planar silicon technology to achieve precise C-V linearity and low parasitic resistance. Its capacitance varies from 14.4–17.6 pF at 1 V to 4.2–5.4 pF at 7.5 V reverse bias, enabling wide-range frequency tuning in VCOs.
Designed for low-voltage operation, it supports stable performance from −55 °C to +125 °C junction temperature, with reverse leakage limited to 10 nA at 10 V/25 °C and 200 nA at 10 V/85 °C - critical for battery-powered RF modules requiring low standby current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Capacitance @ 7.5 V | 4.8 pF typical - sets center frequency and tuning range in VCO tank circuits |
| Capacitance Ratio | 3.3 (1 V / 7.5 V) - enables >1.7× frequency tuning ratio in LC oscillators |
| Series Resistance rs | 0.4 Ω typical at 470 MHz - minimizes Q degradation in high-frequency resonators |
| Max Reverse Voltage VR | 10 V - defines safe tuning voltage headroom in low-voltage RF systems |
| Reverse Leakage IR | 10 nA max at 10 V/25 °C - ensures minimal bias current draw in portable applications |
| Junction Temp Range | −55 °C to +125 °C - supports industrial and extended-temperature wireless transceivers |
Pinout & Package
Package: SOD323 (SC-76), 2-lead surface-mount plastic package; dimensions 1.6 × 1.35 × 0.95 mm; cathode marked by bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to RF ground or fixed bias node; polarity must be observed to avoid forward conduction |
| 2 | Anode | Connected to tuning voltage source; reverse-biased operation required for varactor function |
Key Features
| Feature | Design Value |
|---|---|
| Excellent C-V linearity | Enables predictable, monotonic frequency vs. control voltage response in PLL synthesizers |
| Very low series resistance | Preserves high Q-factor (>100 at 470 MHz) in resonant tank networks |
| SOD323 ultra-small footprint | Reduces PCB area by >50% vs. SOD123; compatible with 0402-class layout automation |
| Low leakage at elevated temperature | Stable tuning bias point maintained across automotive cabin temperature ranges |
Applications
| Wireless Remote Keyless Entry (RKE) | ISM Band Transceivers (315/433 MHz) |
|---|---|
Use Scenario: Compact 433 MHz ASK/OOK transmitter module operating from 3.3 V supply with minimal board space. IC Role / Device Role / Timing Role: Varactor tuning element in Colpitts VCO, adjusting oscillator frequency via microcontroller DAC output. Use Value: 0.4 Ω series resistance maintains >85 dBc phase noise at 100 kHz offset; SOD323 footprint allows integration into <8 mm² module. | Use Scenario: Low-cost 315 MHz sensor node transmitter with ±200 kHz channel spacing requirement. IC Role / Device Role / Timing Role: Capacitance control device in LC tank, enabling precise frequency calibration during production test. Use Value: 3.3 capacitance ratio provides sufficient tuning margin to compensate for ±5% inductor tolerance and PCB parasitics. |
| Bluetooth LE Peripheral Clock Reference | UWB Impulse Radio Tuning |
Use Scenario: Wearable BLE beacon using integrated SoC with external VCO for improved frequency stability. IC Role / Device Role / Timing Role: Fine-tuning capacitor in VCXO front-end, correcting crystal pullability drift due to temperature and aging. Use Value: 10 nA max reverse leakage prevents DAC loading errors in ultra-low-power sleep modes (<1 µA system current). | Use Scenario: 3.1–10.6 GHz UWB pulse generator requiring rapid frequency agility across sub-bands. IC Role / Device Role / Timing Role: Bias-controlled capacitance shunt in switched-capacitor bank for fast band selection. Use Value: Linear C-V response ensures monotonic sub-band switching without frequency hysteresis or dead zones. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar varactor diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BB204,115 | Higher capacitance (22 pF @ 1 V), lower ratio (2.5), rs = 0.6 Ω | Better for low-frequency VCOs (<100 MHz); less suitable for narrowband high-Q designs | Select when wider absolute capacitance range needed over linearity or Q |
| SMV1232-011 | Higher VR (20 V), higher C (15.5 pF @ 1 V), rs = 0.8 Ω, SOD-523 | Supports higher tuning voltages; smaller package but higher series loss | Prefer for 5 V–12 V bias systems where SOD-523 layout compatibility exists |
Compared with BB156,115, BB204,115 trades linearity and Q for greater low-voltage capacitance, while SMV1232-011 extends voltage range at the cost of series resistance and thermal stability - making BB156,115 optimal for compact, low-voltage, high-Q 300–900 MHz VCOs.
Availability
BB156,115 is available at Aetrix Electronics and suitable for wireless remote keyless entry (RKE), ISM band transceivers, and Bluetooth LE peripheral clock reference applications requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for BB156,115 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 specializing in high-performance RF, analog, power management, and secure interface solutions for automotive, industrial, and consumer markets.
The BB156,115 belongs to NXP's discrete varactor diode product line, engineered specifically for miniaturized, low-voltage RF tuning applications where linearity, low loss, and thermal stability are critical.
FAQ
What is the maximum reverse voltage rating for BB156,115?
The BB156,115 has a maximum continuous reverse voltage (VR) rating of 10 V, as specified in the Absolute Maximum Ratings table. Exceeding this voltage risks permanent damage. The device is optimized for low-voltage tuning applications - typical operating range is 1 V to 7.5 V reverse bias - and must remain reverse-biased to function as a varactor. Forward conduction must be avoided in circuit design.
How does the capacitance of BB156,115 vary with reverse voltage?
The BB156,115 exhibits a controlled capacitance decrease with increasing reverse voltage: 14.4–17.6 pF at 1 V, 7.6–9.6 pF at 4 V, and 4.2–5.4 pF at 7.5 V (all measured at 1 MHz). Its typical capacitance ratio Cd(1 V)/Cd(7.5 V) is 3.3, confirming strong linearity across the tuning range - a key parameter verified in Figure 2 of the official NXP datasheet for BB156,115.
What is the series resistance of BB156,115 and why does it matter?
The BB156,115 has a typical series resistance (rs) of 0.4 Ω at 470 MHz and Cd = 9 pF. This low value directly preserves high Q-factor in resonant tank circuits - critical for minimizing phase noise in VCOs. Higher rs would degrade oscillator spectral purity and increase power consumption; the 0.4 Ω figure makes BB156,115 especially suitable for high-frequency, low-noise RF designs.
Is BB156,115 suitable for automotive applications?
No - BB156,115 is not automotive-qualified. Per NXP's official documentation, unless explicitly stated as automotive qualified, the part is not tested or warranted for automotive use. It lacks AEC-Q200 stress testing and is rated for industrial temperature range only (−55 °C to +125 °C junction), not full automotive ambient requirements. For automotive RKE or TPMS, a qualified alternative must be selected.
What package type and marking does BB156,115 use?
BB156,115 uses the SOD323 (SC-76) plastic surface-mount package, measuring 1.6 × 1.35 × 0.95 mm. It is marked with code "PF", and the cathode is indicated by a marking bar adjacent to pin 1. Pin 1 is cathode, pin 2 is anode - correct orientation is essential to maintain reverse-bias operation and prevent forward conduction in VCO designs.
BB156,115 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
BB156,115 FAQ
1.How can I place an order for BB156,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BB156,115 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 BB156,115 reliable?
The price and inventory of BB156,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BB156,115 is usually 5 days.
3.What payment methods are accepted for BB156,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BB156,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BB156,115?
BB156,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BB156,115 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 BB156,115?
For technical support, including BB156,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BB156,115 requirements.
6.How does Aetrix verify that BB156,115 is sourced from the original manufacturer or authorized distributors?
All BB156,115 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 BB156,115 meets industry standards.
7.What is the process for return or replacement of BB156,115?
All BB156,115 units undergo pre-shipment inspection (PSI). If there is an issue with BB156,115, 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 BB156,115 part is unused and in its original packaging.
Return procedure for BB156,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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