My Inquiry
My Account
NXP Semiconductors BB174LXYL
- Part No.:
- BB174LXYL
- Manufacturer:
- NXP Semiconductors
- Package:
- SOD-882D
- Datasheet:
-
BB174LXYL.pdf
- Description:
- DIODE VHF VAR CAP 32V SOD2
- Quantity:
- Payment:
- Shipping:
Inventory:9,218
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BB174LX from NXP Semiconductors is a VHF variable capacitance diode (varactor) fabricated in planar technology, operating as a voltage-controlled capacitor in RF tuning circuits with Cd(1V) = 20.25 pF (typ), Cd(28V) = 2.1 pF (typ), and Cd(1V)/Cd(28V) ratio = 9 - optimized for Voltage Controlled Oscillators up to 300 MHz.
For engineers reviewing the BB174LX datasheet, BB174LX pinout, BB174LX application, or BB174LX equivalent, key selection criteria include reverse voltage range (0–28 V), low series resistance (0.65 Ω at 470 MHz), ultra-small DFN1006D-2 package footprint, and linearity performance in VCO tuning loops.
Technical Context
The BB174LX functions as a reverse-biased junction varactor, where applied DC bias modulates depletion-layer width to achieve continuous capacitance variation from 21.3 pF (1 V) down to 1.95 pF (28 V). Its planar silicon structure ensures stable C–V characteristics across temperature (−55 °C to +125 °C).
Designed specifically for VHF band operation, it delivers low Rs (0.65 Ω typ at 470 MHz) and minimal capacitance hysteresis, enabling high-Q resonant tank performance in compact tunable filters and synthesizer PLL loop filters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cd(1V) | 20.25 pF typical - sets maximum tank capacitance for low-frequency VCO tuning range |
| Cd(28V) | 2.1 pF typical - defines minimum capacitance for high-frequency VCO endpoint |
| Cd(1V)/Cd(28V) ratio | 9:1 - enables >1.5-octave frequency tuning range in LC oscillators |
| rs (series resistance) | 0.65 Ω at 470 MHz - preserves Q-factor >150 in 100–300 MHz resonant circuits |
| VR (max reverse voltage) | 30 V - supports wide bias range for fine-grained VCO frequency resolution |
| IR (reverse leakage) | ≤10 nA at VR = 30 V, 25 °C - minimizes bias network loading and drift |
| Package | DFN1006D-2 (SOD882D) - 1.0 × 0.6 × 0.4 mm body, 0.25 mm pitch, cathode-marked top side |
Pinout & Package
BB174LX uses the SOD882D (DFN1006D-2) ultra-small leadless plastic package: 2-terminal, bottom-terminated, 1.0 mm × 0.6 mm × 0.4 mm body height, with cathode indicated by a marking bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | cathode | DC bias input node; connects to negative/ground side of tuning voltage source in standard VCO configuration |
| 2 | anode | RF signal node; connects to inductor or resonant tank; reverse-biased during operation |
Key Features
| Feature | Design Value |
|---|---|
| Capacitance linearity | Typical Cd(1V)/Cd(2V) = 1.27 - reduces harmonic distortion in analog tuning applications |
| Ultra-small footprint | 0.6 mm² board area - enables dense RF layout in space-constrained IoT transceivers and wearables |
| Low series resistance | 0.65 Ω at 470 MHz - maintains tank Q >150 even at 250 MHz, critical for phase noise performance |
| VHF-optimized C–V curve | Cd(1V)/Cd(28V) = 9 with monotonic decrease - supports stable, predictable frequency sweep in PLLs |
| Thermal stability | Cd temperature coefficient <10⁻⁴ K⁻¹ above 5 V - limits VCO drift over −40 °C to +85 °C ambient |
Applications
| Voltage-Controlled Oscillator (VCO) | Phase-Locked Loop (PLL) Tuning |
|---|---|
|
Use Scenario: Tuning element in a 100–300 MHz discrete VCO for UHF ISM-band transmitters. IC Role / Device Role / Timing Role: Voltage-variable capacitor forming resonant LC tank with fixed inductor. Use Value: 9:1 capacitance ratio enables 1.6-octave frequency coverage without switching banks. |
Use Scenario: Fine-tuning capacitor in the loop filter of a fractional-N synthesizer for Bluetooth LE radios. IC Role / Device Role / Timing Role: Bias-controlled reactance adjusting VCO gain (KVCO) and loop bandwidth. Use Value: Low rs (0.65 Ω) prevents Q degradation and phase noise increase at 2.4 GHz reference harmonics. |
| RF Front-End Impedance Matching | FM Modulator Core |
|
Use Scenario: Dynamic matching network component in a multi-band LTE PA output stage. IC Role / Device Role / Timing Role: Bias-adjustable shunt capacitance compensating antenna impedance shifts. Use Value: 21.3 pF max capacitance provides sufficient reactance swing to cover 700–2600 MHz bands. |
Use Scenario: Direct FM modulation core in a low-power VHF transmitter for telemetry links. IC Role / Device Role / Timing Role: Audio-voltage-controlled oscillator element generating frequency deviation. Use Value: Excellent C–V linearity (Cd(1V)/Cd(2V) = 1.27) minimizes harmonic distortion in ±75 kHz deviation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar varactor diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BBY52-02W | Cd(1V) = 22.5 pF, Cd(28V) = 2.5 pF, ratio = 9; rs = 0.8 Ω at 470 MHz; same SOD882D package | Slightly higher capacitance spread but lower Q due to higher rs - suitable for less demanding VCOs | Select BBY52-02W if wider initial C range is needed and phase noise budget allows +0.15 Ω rs penalty |
| SMV1232-011 | Cd(1V) = 18.5 pF, Cd(28V) = 1.7 pF, ratio = 10.9; rs = 0.55 Ω; SOD-323 package (1.7 × 1.3 mm) | Higher ratio and lower rs, but 3.7× larger footprint - impacts RF layout density | Choose SMV1232-011 only when >10:1 tuning range is mandatory and board area permits larger package |
Compared with BBY52-02W and SMV1232-011, the BB174LX delivers optimal balance of tuning range (9:1), ultra-compact size (1.0 × 0.6 mm), and proven VHF Q-performance - making it preferred for miniaturized, battery-powered VCO designs where layout area and phase noise are co-constrained.
Availability
BB174LX is available at Aetrix Electronics and suitable for Voltage Controlled Oscillators, PLL frequency synthesizers, and RF impedance matching networks requiring stable component supply, consistent parametric performance, and long-term manufacturability in high-volume consumer and industrial wireless modules.
Supply support for BB174LX 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 IoT applications.
The BB174LX belongs to NXP's RF varactor diode product line, engineered specifically for high-linearity, low-loss voltage-controlled tuning in VHF/UHF radio systems - emphasizing miniaturization, thermal stability, and repeatable C–V behavior.
FAQ
What is the maximum reverse voltage rating for BB174LX?
The BB174LX has an absolute maximum reverse voltage (VR) rating of 30 V, per IEC 60134 limiting values. Operation up to 28 V is specified in characterization tables for capacitance and ratio metrics; sustained bias beyond 28 V may reduce long-term reliability and is not recommended for production designs using BB174LX.
Does BB174LX support operation at temperatures above 85 °C?
Yes, BB174LX is rated for junction temperatures up to +125 °C and storage temperatures up to +150 °C. Reverse leakage current increases to ≤200 nA at VR = 30 V and Tj = 85 °C, confirming functional operation in extended-temperature industrial environments where BB174LX remains within specification.
Is BB174LX pin-compatible with other SOD882D varactors like BBY52-02W?
Yes, BB174LX shares the identical SOD882D (DFN1006D-2) package outline and pin assignment (Pin 1 = cathode, Pin 2 = anode) with BBY52-02W, enabling direct PCB footprint reuse. However, capacitance values and series resistance differ, so circuit recalibration is required when substituting BB174LX for BBY52-02W or vice versa.
What is the typical capacitance temperature coefficient of BB174LX?
The BB174LX exhibits a capacitance temperature coefficient (TCCd) of less than 10⁻⁴ K⁻¹ above 5 V reverse bias, as shown in Figure 5 of the datasheet. This low drift supports stable VCO center frequency over −40 °C to +85 °C ambient, a key requirement for BB174LX in unregulated outdoor RF modules.
Can BB174LX be used in 500 MHz applications?
No - BB174LX is characterized and specified for VHF operation (30–300 MHz). While its series resistance is measured at 470 MHz, the capacitance roll-off and Q degradation above 300 MHz make BB174LX unsuitable for reliable 500 MHz VCO or filter use; NXP positions BB174LX explicitly as a VHF varactor, not an L-band device.
BB174LXYL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- SOD-882D
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Capacitance @ Vr, F:
- 2.22pF @ 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:
- SOD882D
BB174LXYL FAQ
1.How can I place an order for BB174LXYL through Aetrix?
Please submit a Request for Quotation (RFQ) for BB174LXYL 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 BB174LXYL reliable?
The price and inventory of BB174LXYL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BB174LXYL is usually 5 days.
3.What payment methods are accepted for BB174LXYL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BB174LXYL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BB174LXYL?
BB174LXYL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BB174LXYL 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 BB174LXYL?
For technical support, including BB174LXYL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BB174LXYL requirements.
6.How does Aetrix verify that BB174LXYL is sourced from the original manufacturer or authorized distributors?
All BB174LXYL 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 BB174LXYL meets industry standards.
7.What is the process for return or replacement of BB174LXYL?
All BB174LXYL units undergo pre-shipment inspection (PSI). If there is an issue with BB174LXYL, 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 BB174LXYL part is unused and in its original packaging.
Return procedure for BB174LXYL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BB174LXYL 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…
