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Infineon Technologies BB 555 E7902
- Part No.:
- BB 555 E7902
- Manufacturer:
- Infineon Technologies
- Package:
- SC-80
- Datasheet:
-
BB 555 E7902.pdf
- Description:
- DIODE VAR CAP 30V 20MA SCD-80
- Quantity:
- Payment:
- Shipping:
Inventory:8,389
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Product details
Overview
BB555 E7902 from NXP Semiconductors is a silicon hyperabrupt tuning diode in SC79 package, designed for UHF-TV tuner VCO and RF filter frequency control. It delivers 14.01 pF typical capacitance at 2 V, 8.9 typical capacitance ratio (CT₁/CT₂₈), and 0.6 nH series inductance - enabling precise, low-loss resonance tuning in compact TV front-ends.
For engineers reviewing the BB555 E7902 datasheet, BB555 E7902 pinout, BB555 E7902 application, or BB555 E7902 equivalent, key selection criteria include its 30 V reverse voltage rating, <0.75 Ω series resistance at 470 MHz, ±2.5% capacitance matching across 4-diode sequences, and RoHS-compliant Pb-free construction for broadcast receiver designs.
Technical Context
This hyperabrupt junction varactor operates with voltage-dependent capacitance optimized for linear C–V response in UHF band (300–3000 MHz). Its low LS (0.6 nH) and rS (typ. 0.58 Ω) minimize parasitic phase shift and insertion loss in resonant tank circuits.
The diode exhibits stable capacitance vs. temperature (±2% over –55°C to +150°C at VR = 1 V) and tight matching (≤2.5% ∆CT/CT across 4-device sequences), supporting factory-trimmed tuner modules without individual calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Capacitance @ 2 V | 14.01 pF typical - sets center frequency of UHF VCO tanks with predictable tuning slope |
| Capacitance Ratio CT₁/CT₂₈ | 8.9 typical - enables >3-octave tuning range in single-diode resonator designs |
| Series Inductance (LS) | 0.6 nH - limits self-resonance above 3 GHz, preserving Q-factor in 470–862 MHz TV bands |
| Series Resistance (rS) | 0.58 Ω typical @ 470 MHz - maintains loaded Q >100 in 50 Ω impedance-matched filters |
| Reverse Voltage (VR) | 30 V max - supports wide-tuning-range biasing in analog TV tuner supply rails |
| Capacitance Matching (∆CT/CT) | ≤2.5% over 4-diode sequence - allows batch replacement in multi-section bandswitched filters |
Pinout & Package
SC79 package: ultra-small surface-mount plastic case (1.3 × 0.7 × 0.5 mm), cathode-marked top-side dot, single anode/cathode configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | DC bias input / AC ground reference | Connected to fixed DC potential; serves as RF ground node in series-tuned configurations |
| Cathode | RF signal terminal / variable capacitance node | Connected to resonant inductor; voltage-controlled capacitance modulates tank frequency |
Key Features
| Feature | Design Value |
|---|---|
| Hyperabrupt junction profile | Linearized C–V slope (n ≈ −2.5) for uniform frequency vs. tuning voltage in UHF oscillators |
| In-line matching assembly | Guarantees ≤2.5% ∆CT/CT across 4-device sequences - eliminates per-unit trim in production tuners |
| Pb-free RoHS-compliant construction | Meets EU Directive 2011/65/EU without SnPb solder compatibility compromises |
| Low-temperature coefficient | ±2% C(TA)/C(25°C) over –55°C to +150°C - sustains channel alignment in unheated outdoor TV enclosures |
Applications
| UHF Analog TV Tuner Front-End | Digital Terrestrial TV (DTT) Channel Selector |
|---|---|
Use Scenario: Selecting VHF/UHF broadcast channels in legacy analog TV receivers with mechanical tuner replacement. IC Role / Device Role / Timing Role: Voltage-controlled capacitor in parallel-resonant VCO tank circuit, directly setting local oscillator frequency. Use Value: 8.9 CT₁/CT₂₈ ratio enables full 470–862 MHz coverage with single 0–30 V tuning sweep and no bandswitching. | Use Scenario: Frequency-agile RF filtering in DVB-T set-top box tuners requiring fast channel lock. IC Role / Device Role / Timing Role: Tuning element in switched-capacitor bank for multi-band SAW-less IF selection. Use Value: ≤2.5% capacitance matching across 4-diode sequences ensures consistent group delay and passband shape across production units. |
| FM Radio Receiver Local Oscillator | ISM Band 868 MHz Transceiver VCO |
Use Scenario: Compact FM radio module in automotive infotainment systems with space-constrained PCB layout. IC Role / Device Role / Timing Role: Primary capacitance control in Colpitts oscillator topology operating at 88–108 MHz. Use Value: 0.6 nH LS and 0.58 Ω rS maintain oscillator phase noise <–110 dBc/Hz @ 10 kHz offset in 50 Ω environment. | Use Scenario: Low-power wireless sensor node using sub-GHz ISM band with battery lifetime constraints. IC Role / Device Role / Timing Role: Fine-tuning capacitor in integrated VCO core for frequency calibration and drift compensation. Use Value: Stable –55°C to +150°C operation ensures 868 MHz carrier accuracy across industrial ambient conditions without heater or compensation firmware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar tuning diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BB555-02V | Identical electrical specs; same SC79 package but laser-marked "B" instead of "BB555 E7902" | No functional difference - used interchangeably in NXP's tuner reference designs | Select when sourcing from standard distribution reels (8,000 pcs/reel, 2 mm pitch) |
| BB535 | Higher capacitance (17.5 pF @ 1 V), lower CT₁/CT₂₈ (8.2 min), same LS/rS, SOD323 package (larger footprint) | Suitable for VHF-dominant tuners; requires PCB pad redesign due to SOD323 vs. SC79 | Choose only if legacy board reuse mandates SOD323 or higher initial C is needed for <200 MHz operation |
Compared with BB555-02V, BB555 E7902 offers identical RF performance but distinct date-code marking (E7902 = week 79, 2002); versus BB535, it trades 3.5 pF lower C₁ for tighter UHF matching and 30% smaller footprint - critical for modern miniaturized TV modules.
Availability
BB555 E7902 is available at Aetrix Electronics and suitable for UHF-TV tuners, digital terrestrial TV receivers, FM radio front-ends, and ISM-band transceiver VCOs requiring stable component supply across long-lifecycle consumer electronics programs.
Supply support for BB555 E7902 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 Dutch semiconductor company specializing in secure connectivity solutions for automotive, industrial, and consumer applications.
BB555 E7902 belongs to NXP's RF tuning diode product line, engineered specifically for high-volume broadcast receiver tuning applications demanding precision C–V linearity and production-grade matching.
FAQ
What is the maximum reverse voltage rating for BB555 E7902?
The absolute maximum reverse voltage is 30 V at TA = 25°C, with a peak reverse voltage of 35 V for short-duration pulses (R ≥ 5 kΩ). Exceeding 30 V DC risks irreversible junction breakdown and permanent capacitance drift, especially above 85°C where IR rises to 200 nA.
Does BB555 E7902 require external temperature compensation in UHF tuner designs?
No - its normalized capacitance variation is limited to ±2% over –55°C to +150°C at VR = 1 V, and its temperature coefficient (TCC) remains below 10⁻³/°C across 1–25 V. This stability eliminates need for thermistor networks or digital calibration in most broadcast tuner implementations.
Can BB555 E7902 be substituted with BB555-02V in existing PCB layouts?
Yes - BB555-02V shares identical SC79 package dimensions, pinout, and electrical specifications. The only difference is marking ("B" vs. "BB555 E7902") and reel packaging (8,000 pcs/reel for -02V vs. custom E7902 reels). No layout or schematic changes are required.
What is the significance of the "in-line matching assembly procedure" cited in the datasheet?
This proprietary NXP process groups diodes from the same wafer lot and adjacent die positions, then tests and bins them sequentially to guarantee ≤2.5% ∆CT/CT across 4-device sequences. It enables plug-and-play replacement in multi-section tuners without post-assembly capacitance trimming or binning.
BB 555 E7902 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- SC-80
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Capacitance @ Vr, F:
- 2.3pF @ 28V, 1MHz
- Capacitance Ratio:
- 9.8
- Capacitance Ratio Condition:
- C1/C28
- Voltage - Peak Reverse (Max):
- 30 V
- Diode Type:
- Single
- Q @ Vr, F:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SCD-80
BB 555 E7902 FAQ
1.How can I place an order for BB 555 E7902 through Aetrix?
Please submit a Request for Quotation (RFQ) for BB 555 E7902 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 BB 555 E7902 reliable?
The price and inventory of BB 555 E7902 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BB 555 E7902 is usually 5 days.
3.What payment methods are accepted for BB 555 E7902?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BB 555 E7902 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BB 555 E7902?
BB 555 E7902 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BB 555 E7902 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 BB 555 E7902?
For technical support, including BB 555 E7902 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BB 555 E7902 requirements.
6.How does Aetrix verify that BB 555 E7902 is sourced from the original manufacturer or authorized distributors?
All BB 555 E7902 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 BB 555 E7902 meets industry standards.
7.What is the process for return or replacement of BB 555 E7902?
All BB 555 E7902 units undergo pre-shipment inspection (PSI). If there is an issue with BB 555 E7902, 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 BB 555 E7902 part is unused and in its original packaging.
Return procedure for BB 555 E7902:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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