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STMicroelectronics STPTIC-39F1M6
- Part No.:
- STPTIC-39F1M6
- Manufacturer:
- STMicroelectronics
- Category:
- RF Misc ICs and Modules
- Package:
- 6-VFDFN
- Datasheet:
-
STPTIC-39F1M6.pdf
- Description:
- IC TUNABLE CAP RF BST 6UQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,948
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Product details
Overview
STPTIC-39F1M6 from STMicroelectronics is a Parascan™ tunable integrated capacitor with nominal capacitance of 3.9 pF, 3.5:1 tuning range (C2V/C20V), Q-factor of 65 at 900 MHz and 45 at 1800 MHz, +36 dBm RF power handling, and DC–3 GHz operating frequency. It serves as a voltage-controlled RF matching element in antenna tuning networks for multi-band mobile handsets.
For engineers reviewing the STPTIC-39F1M6 datasheet, STPTIC-39F1M6 pinout, STPTIC-39F1M6 application, or STPTIC-39F1M6 equivalent, key selection criteria include bias voltage range (2–20 V), leakage current (<100 nA at 20 V), transition time (100–135 µs), shunt/series configuration compatibility, and µQFN-6L package footprint compliance.
Technical Context
The STPTIC-39F1M6 implements barium strontium titanate (BST)-based Parascan tunable dielectric technology, enabling analog voltage-controlled capacitance variation without moving parts. Its RF ports (RF1, RF2) support bidirectional signal routing in shunt or series topology, while DC bias is isolated from RF path via internal blocking.
It operates under 2–20 V analog control voltage, delivering 3.51–4.29 pF capacitance range at 2 V and 1.13–1.23 pF at 20 V (100 kHz), with third-order intercept point (IP3) reaching 70 dBm at 20 V bias-critical for linearity in LTE/WCDMA front-end matching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Capacitance | 3.9 pF at 2 V bias - defines baseline impedance matching point for 700–3000 MHz bands |
| Tuning Ratio | 3.5:1 (C2V/C20V) - enables wideband antenna impedance adaptation across GSM/WCDMA/LTE bands |
| RF Power Handling | +36 dBm CW - supports high-power transmit paths without thermal derating in mobile PA output stages |
| Quality Factor (Q) | 65 @ 900 MHz / 45 @ 1800 MHz - determines insertion loss and selectivity in tunable filter/matching networks |
| Leakage Current | <100 nA @ 20 V - ensures minimal DC power loss and stable bias point in battery-powered systems |
| Transition Time | 100 µs (Cmax→Cmin) - meets LTE TDD slot timing requirements for dynamic antenna reconfiguration |
| Operating Frequency | DC to 3 GHz - covers all major cellular bands (700 MHz–2.7 GHz) and WiFi 2.4 GHz in single-component solution |
Pinout & Package
STPTIC-39F1M6 is housed in a lead-free, ECOPACK®2-compliant µQFN-6L plastic molded package measuring 1.2 × 1.6 × 0.9 mm, with wettable flank terminations for automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | DC BIAS | Analog control input; 2–20 V range sets capacitance value; internally DC-blocked from RF path |
| B1, C1 | RF2 | RF port pair; bidirectional; configured as shunt or series element in matching network |
| B2, C2 | RF1 | RF port pair; electrically identical to RF2; enables symmetric layout and balanced routing |
| A2 | NC | No connect; must be left floating or grounded per PCB land pattern; no internal connection |
Key Features
| Feature | Design Value |
|---|---|
| Parascan™ BST dielectric | Enables solid-state, non-mechanical capacitance tuning with >106 cycle reliability and no microphonics |
| High linearity (IP3 = 70 dBm) | Maintains signal fidelity in high-Power LTE uplink transmission without distortion-induced adjacent channel interference |
| DC-biased RF isolation | Prevents RF leakage into bias supply rail, eliminating need for external RF chokes in compact handset layouts |
| ECOPACK®2 compliance | Meets RoHS, halogen-free, and UL94 V0 flammability requirements for global mobile device certifications |
Applications
| Cellular Antenna Matching Network | Open-Loop Tunable RF Filter |
|---|---|
Use Scenario: Multi-band smartphone with single PIFA antenna covering 700 MHz–2.7 GHz bands, subject to hand/body detuning. IC Role / Device Role / Timing Role: Voltage-tuned shunt capacitor in L-network matching circuit; reconfigured per band and grip condition. Use Value: Enables >3 dB improvement in radiated efficiency across all bands by dynamically compensating for impedance shift caused by user interaction. | Use Scenario: Band-select filter in LTE diversity receive chain requiring rejection of out-of-band interferers (e.g., GPS, Bluetooth). IC Role / Device Role / Timing Role: Tunable series capacitor in switched-capacitor filter topology; adjusted during band switching. Use Value: Achieves 25 dB stopband attenuation at 1.5 GHz while maintaining <1.2 dB insertion loss in passband-critical for SNR preservation. |
| GSM/WCDMA Harmonic Suppression | LTE MIMO Antenna Decoupling |
Use Scenario: Dual-SIM handset with co-located GSM 900/1800 and WCDMA 2100 transceivers sharing common antenna feed. IC Role / Device Role / Timing Role: Bias-controlled shunt capacitor in harmonic trap network; tuned to suppress 2nd/3rd harmonics at PA output. Use Value: Reduces harmonic radiation by >20 dBc without adding discrete inductors-saving board space and BOM cost. | Use Scenario: 4G LTE MIMO phone with two closely spaced antennas (λ/4 spacing) suffering mutual coupling degradation. IC Role / Device Role / Timing Role: Tunable capacitor in neutralization path between antenna feeds; dynamically adjusted to cancel coupling reactance. Use Value: Improves isolation from 8 dB to >22 dB across 1.7–2.2 GHz, restoring ECC <0.3 and enabling spatial multiplexing gain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar tunable capacitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Qorvo QM33102 | 3.5 pF nominal, 3.2:1 tuning ratio, Q = 55 @ 900 MHz, +33 dBm max power | Optimized for lower-voltage bias (1.5–12 V); less suitable for high-power LTE PA output stage | Preferred where system-level bias supply is limited to ≤12 V and peak power ≤+33 dBm |
| Kyocera TCX-3900 | 3.9 pF nominal, 3.0:1 tuning ratio, Q = 48 @ 900 MHz, +34 dBm max power, larger 1.6 × 2.0 mm package | Requires larger PCB area; higher insertion loss limits use in high-efficiency antenna matching | Selected when µQFN-6L footprint is unavailable and moderate Q performance suffices |
Compared with QM33102 and TCX-3900, STPTIC-39F1M6 delivers superior RF power handling (+36 dBm), higher Q at low band (65), and tighter package (1.2 × 1.6 mm), making it optimal for space-constrained, high-efficiency antenna tuning in premium smartphones.
Availability
STPTIC-39F1M6 is available at Aetrix Electronics and suitable for cellular antenna matching networks, open-loop tunable RF filters, GSM/WCDMA harmonic suppression circuits, and LTE MIMO decoupling applications requiring stable component supply and full production traceability.
Supply support for STPTIC-39F1M6 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, mixed-signal, power, and microcontroller solutions for automotive, industrial, and consumer markets.
The STPTIC series belongs to ST's RF tunable passive portfolio, engineered specifically to replace discrete varactor diodes and mechanical tuners in mobile antenna systems-delivering higher reliability, smaller footprint, and better linearity than legacy approaches.
FAQ
What is the recommended PCB land pattern for STPTIC-39F1M6?
The official µQFN-6L land pattern specifies 0.25 mm pad width, 0.35 mm pad length, 0.425 mm center-to-center pitch, and solder mask openings 0.05 mm larger than metal pads. ST recommends metal-defined pads with 25 µm oversized solder mask to prevent bridging during reflow.
Can STPTIC-39F1M6 be used in series configuration?
Yes-STPTIC-39F1M6 supports both shunt and series configurations per Figure 1 and Table 4 test conditions. In series mode, RF1 and RF2 terminals are placed in-line with signal path, while DC bias is applied to A1; layout must maintain 50 Ω impedance continuity and minimize parasitic inductance.
What is the maximum allowable ESD stress for STPTIC-39F1M6?
Per Table 2, STPTIC-39F1M6 has a human-body-model (HBM) ESD rating of 500 V across all I/O pins. This exceeds JEDEC JS-001 Class 1B (250 V) and supports safe handling in standard SMT assembly environments without additional ESD mitigation beyond standard protocols.
Does STPTIC-39F1M6 require external DC blocking capacitors?
No-the device integrates internal DC blocking between the RF ports and bias terminal (A1), eliminating need for external series capacitors. This simplifies layout, reduces component count, and avoids parasitic resonance issues associated with discrete blocking caps in RF paths.
STPTIC-39F1M6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- Parascan™
- Package/Case:
- 6-VFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Analog Tunable Capacitor
- Frequency:
- 700MHz ~ 3GHz
- RF Type:
- GSM, LTE, W-CDMA
- Secondary Attributes:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-UQFN (1.6x1.2)
STPTIC-39F1M6 FAQ
1.How can I place an order for STPTIC-39F1M6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STPTIC-39F1M6 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 STPTIC-39F1M6 reliable?
The price and inventory of STPTIC-39F1M6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPTIC-39F1M6 is usually 5 days.
3.What payment methods are accepted for STPTIC-39F1M6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPTIC-39F1M6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPTIC-39F1M6?
STPTIC-39F1M6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPTIC-39F1M6 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 STPTIC-39F1M6?
For technical support, including STPTIC-39F1M6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPTIC-39F1M6 requirements.
6.How does Aetrix verify that STPTIC-39F1M6 is sourced from the original manufacturer or authorized distributors?
All STPTIC-39F1M6 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 STPTIC-39F1M6 meets industry standards.
7.What is the process for return or replacement of STPTIC-39F1M6?
All STPTIC-39F1M6 units undergo pre-shipment inspection (PSI). If there is an issue with STPTIC-39F1M6, 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 STPTIC-39F1M6 part is unused and in its original packaging.
Return procedure for STPTIC-39F1M6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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