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Microchip Technology SST12LF01-QDF
- Part No.:
- SST12LF01-QDF
- Manufacturer:
- Microchip Technology
- Category:
- RF Front End (LNA + PA)
- Package:
- 12-WFQFN Exposed Pad
- Datasheet:
-
SST12LF01-QDF.pdf
- Description:
- IC FRONT-END MODULE 24WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,711
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Product details
Overview
SST12LF01-QDF from Microchip Technology is a 2.4 GHz Front-End Module (FEM) integrating a GaAs PHEMT-based Low-Noise Amplifier (LNA) and an InGaP/GaAs HBT Power Amplifier (PA) in a single 24-contact WQFN package. It delivers 12 dB RX gain, 1.45 dB noise figure, 29 dB TX gain, >26.5 dBm P1dB output, and meets IEEE 802.11g/b OFDM and DSSS spectral masks up to 23 dBm - enabling compact, high-efficiency WLAN transceivers.
For engineers reviewing the SST12LF01-QDF datasheet, SST12LF01-QDF pinout, SST12LF01-QDF application, or SST12LF01-QDF equivalent, key selection criteria include its dual-chain RF performance across 2.4–2.55 GHz, ultra-low 2.5 µA shutdown current, <100 ns power-up/down timing, and integrated 50 Ω input/output matching eliminating external DC blocking capacitors.
Technical Context
The SST12LF01-QDF implements two independent RF signal paths: an LNA chain with self-biasing architecture (11 mA typical operating current, no external bias networks) and a PA chain with three-stage VCC supply (VCC_TX1, VCC_TX2, VCCb) and precision VREF-controlled enable/current regulation. Both chains operate within the same 2.4–2.55 GHz band but with distinct optimization - LNA prioritizes low noise and moderate gain, while PA emphasizes linearity (≤4% added EVM at 20 dBm) and power-added efficiency (22% @ 22 dBm for 802.11g).
Its functional block integrates DC blocking on all RF ports, eliminates need for external matching components, and supports fast TDD switching via VREF control with <200 ns total delay including driver latency. Thermal stability is maintained across –40°C to +85°C ambient, with ≤1 dB gain/power variation over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RX Frequency Range | 2.4–2.55 GHz - fully covers 802.11b/g/n and Bluetooth 2.4 GHz ISM band without tuning. |
| RX Small-Signal Gain | 12 dB typical - provides sufficient LNA boost before baseband ADC, minimizing system noise figure. |
| RX Noise Figure | 1.45 dB typical - enables high-sensitivity reception in low-SNR environments like dense indoor WLAN. |
| TX Output Power (P1dB) | >26.5 dBm - supports robust link budget margin and regulatory headroom for 802.11b/g compliance. |
| TX Power-Added Efficiency | 22% @ 22 dBm (802.11g), 26% @ 23.5 dBm (802.11b) - reduces thermal load and extends battery life in portable devices. |
| Shut-down Current | 2.5 µA typical - enables ultra-low-power sleep modes in duty-cycled IoT and mobile WLAN applications. |
| Power-Up/Down Time | <100 ns (10%–90%) - meets strict TDD timing requirements for time-division duplexed 802.11 systems. |
Pinout & Package
Package: 24-contact WQFN (4 mm × 4 mm, 0.4 mm pitch), RoHS-compliant, with exposed thermal paddle electrically connected to ground - requires PCB thermal pad connection per JEDEC MO-220J WGGD-4 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (LNAIN) | LNA RF Input | 50 Ω matched single-ended input; no external DC blocking required. |
| 4, 5 (PAOUT) | PA RF Output | Dual-output configuration enables balanced layout or diversity routing; both pins carry identical RF signal. |
| 6 (VCC_TX2) | PA 2nd-Stage Supply | Provides bias to final PA stage; separate from VCC_TX1 to optimize efficiency vs. linearity trade-off. |
| 9 (VCC_TX1) | PA 1st-Stage Supply | Bias for driver stage; decoupling critical to suppress inter-stage coupling and oscillation. |
| 10 (VREF) | PA Enable & Current Control | Analog voltage-controlled enable; <4 mA IREF allows direct MCU GPIO drive without level-shifting. |
| 11 (VCCb) | PA Bias Circuit Supply | Powers internal bias generation network; isolated to prevent supply noise from modulating PA gain. |
| 14 (PAIN) | PA RF Input | 50 Ω matched single-ended input; DC-isolated, compatible with direct connection from TR switch or transceiver output. |
| 18 (LNAOUT) | LNA RF Output | 50 Ω matched single-ended output; directly interfaces with SAW filter or mixer input without matching. |
| 22 (VDD_RX) | LNA Power Supply | Single 3.3 V supply powers entire LNA chain; self-biasing eliminates external resistors. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LNA + PA in single WQFN | Reduces PCB area by >40% vs. discrete solutions; eliminates inter-stage RF trace losses and layout sensitivity. |
| 50 Ω input/output matching on all RF ports | Removes need for external DC blocking capacitors, baluns, or impedance-matching networks - cuts BOM count and assembly cost. |
| Ultra-fast enable/disable control | VREF-driven switching with <200 ns total delay enables tight TDD guard-band timing in 802.11g/n systems. |
| Thermal-stable gain and output power | ≤1 dB variation from 0°C to +85°C ensures consistent link budget across industrial temperature range. |
| Low idle current (75 mA) | Supports always-on receive monitoring in battery-powered IoT gateways without excessive quiescent drain. |
Applications
| WLAN Access Point | Wi-Fi Client Device |
|---|---|
|
Use Scenario: Dual-band AP with concurrent 2.4 GHz client handling and backhaul. IC Role / Device Role / Timing Role: FEM handles full 2.4 GHz RX/TX path - LNA amplifies weak client signals; PA drives antenna with linear 23 dBm output meeting 802.11g mask. Use Value: Enables high-density client support with minimal EVM degradation (<4% at 20 dBm), preserving throughput under multi-user interference. |
Use Scenario: Portable laptop or tablet with integrated Wi-Fi/BT combo radio. IC Role / Device Role / Timing Role: Single-chip FEM replaces discrete LNA+PA+switch; supports rapid TDD switching between RX and TX during packet bursts. Use Value: 2.5 µA shutdown current extends battery runtime in sleep mode; 4×4 mm WQFN saves space for thin form factors. |
| Bluetooth Audio Gateway | Smart Home Hub |
|
Use Scenario: Multi-protocol hub relaying audio streams between BLE earbuds and cloud services. IC Role / Device Role / Timing Role: LNA receives low-power BLE advertising packets; PA transmits ACKs and control frames with low-latency enable timing. Use Value: 1.45 dB NF ensures reliable -90 dBm packet detection; <100 ns power-up prevents missed connection windows. |
Use Scenario: Always-on Zigbee/Wi-Fi bridge managing dozens of low-power sensors. IC Role / Device Role / Timing Role: FEM operates in burst-mode RX listening (75 mA ICQ), then transmits status updates using high-efficiency PA stage. Use Value: 22% PAE at 22 dBm minimizes heat generation in sealed enclosures; RoHS/WQFN supports automated reflow assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 2.4 GHz front-end module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST12LP14-QDF | Higher 33 dB TX gain, 2.7–3.6 V operation, 28-pin QFN - adds integrated harmonic filtering and improved ACPR at 24 dBm. | Targets higher-output access points requiring extended range; not drop-in due to pin count and VCC architecture differences. | Select when >24 dBm output and stricter spectral purity are required; verify PCB layout compatibility. |
| SKY85303-31 | 24-pin QFN, 2.4–2.5 GHz, 13 dB RX gain, 2.1 dB NF, 28 dB TX gain - uses SiGe process, lower cost, wider supply range (2.7–5.5 V). | Better suited for cost-sensitive consumer routers; slightly higher NF trades off sensitivity for manufacturability. | Prefer for high-volume, price-driven designs where 0.65 dB NF penalty is acceptable for BOM savings. |
Compared with SST12LF01-QDF, SST12LP14-QDF offers higher gain and filtering at the expense of pin compatibility and power supply complexity, while SKY85303-31 provides broader voltage tolerance and lower unit cost but with reduced noise performance - making SST12LF01-QDF optimal for balanced sensitivity, linearity, and integration in mid-tier WLAN/BT systems.
Availability
SST12LF01-QDF is available at Aetrix Electronics and suitable for WLAN access points, Wi-Fi client devices, Bluetooth audio gateways, and smart home hubs requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for SST12LF01-QDF 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
Microchip Technology is a global semiconductor company specializing in microcontrollers, analog, FPGA, and RF solutions, with leadership in embedded control and connectivity technologies.
The SST12LF01-QDF belongs to Microchip's RF Front-End Module product line, designed specifically for IEEE 802.11b/g/n and Bluetooth 2.4 GHz ISM-band applications demanding high integration, low power, and production-ready RF performance.
FAQ
What is the operating frequency range of the SST12LF01-QDF?
The SST12LF01-QDF operates across 2.4–2.55 GHz for both RX and TX chains, fully covering the 2.4 GHz ISM band used by IEEE 802.11b/g/n and Bluetooth standards. Its specified performance - including 12 dB RX gain, 1.45 dB noise figure, and 29 dB TX gain - is validated across this entire band per Tables 4 and 5 in the DS75040A datasheet.
Does the SST12LF01-QDF require external matching components?
No, the SST12LF01-QDF features fully 50 Ω matched RF ports on LNAIN, LNAOUT, PAIN, and PAOUT - confirmed in the Product Description and Pin Descriptions sections of the DS75040A datasheet. This eliminates the need for external DC blocking capacitors, baluns, or impedance-matching networks, reducing BOM count and layout complexity.
What is the shutdown current specification for SST12LF01-QDF?
The SST12LF01-QDF draws a typical shutdown current of 2.5 µA, as specified in Table 3 (DC Electrical Characteristics) of the DS75040A datasheet. This ultra-low value enables energy-efficient sleep modes in battery-powered WLAN and Bluetooth devices without compromising wake-up responsiveness.
How many power supply rails does the SST12LF01-QDF require?
The SST12LF01-QDF requires four distinct DC supplies: VDD_RX (pin 22) for the LNA chain, VCC_TX1 (pin 9) and VCC_TX2 (pin 6) for the PA driver and output stages, and VCCb (pin 11) for the PA bias circuit - all detailed in Table 1 (Pin Descriptions) and Figure 15 (Typical Schematic) of the DS75040A datasheet.
Is the SST12LF01-QDF pin-compatible with other Microchip FEMs like SST12LP14-QDF?
No, the SST12LF01-QDF is not pin-compatible with SST12LP14-QDF. While both use WQFN packages, SST12LF01-QDF has 24 contacts and dedicated VCCb/VREF control, whereas SST12LP14-QDF uses 28 pins and different power sequencing - confirmed by comparing Figures 2 and 16 in DS75040A and the SST12LP14 datasheet. PCB redesign is required for substitution.
SST12LF01-QDF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- RF Type:
- Bluetooth, WLAN
- Frequency:
- 2.4GHz
- Features:
- -
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 24-WQFN (4x4)
SST12LF01-QDF FAQ
1.How can I place an order for SST12LF01-QDF through Aetrix?
Please submit a Request for Quotation (RFQ) for SST12LF01-QDF 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 SST12LF01-QDF reliable?
The price and inventory of SST12LF01-QDF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST12LF01-QDF is usually 5 days.
3.What payment methods are accepted for SST12LF01-QDF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST12LF01-QDF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST12LF01-QDF?
SST12LF01-QDF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST12LF01-QDF 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 SST12LF01-QDF?
For technical support, including SST12LF01-QDF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST12LF01-QDF requirements.
6.How does Aetrix verify that SST12LF01-QDF is sourced from the original manufacturer or authorized distributors?
All SST12LF01-QDF 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 SST12LF01-QDF meets industry standards.
7.What is the process for return or replacement of SST12LF01-QDF?
All SST12LF01-QDF units undergo pre-shipment inspection (PSI). If there is an issue with SST12LF01-QDF, 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 SST12LF01-QDF part is unused and in its original packaging.
Return procedure for SST12LF01-QDF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST12LF01-QDF Tags
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RFX2401C
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NRF21540-QDAA-R
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NRF21540-QDAA-R7
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RFX2411N
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SE2438T-R
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SKY66118-11
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SKY85712-21
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SKY85329-11
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SKY66422-11
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SKY66119-11
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