My Inquiry
My Account
Skyworks Solutions Inc. SKY65377-21
- Part No.:
- SKY65377-21
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- RF Front End (LNA + PA)
- Package:
- 28-SMD Module
- Datasheet:
-
SKY65377-21.pdf
- Description:
- FEM FRONT END MODULE 12-MCM
- Quantity:
- Payment:
- Shipping:
Inventory:2,952
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SKY65377-21 from Skyworks Solutions is a 450 MHz transmit/receive front-end module (FEM) integrating PA, T/R switch, harmonic filter, and bias/match networks in a single MCM package. It delivers +30 dBm output power with 40% PAE, analog VPC-based power control, and shutdown mode - designed for ISM-band range extenders and AMR/AMI systems.
For engineers reviewing the SKY65377-21 datasheet, SKY65377-21 pinout, SKY65377-21 application, or SKY65377-21 equivalent, key selection criteria include its 28-pin 6 × 6 mm MCM footprint, dual-mode digital control (TR/EN), internal 50 Ω matching on TX/RX/ANT ports, and verified 450–470 MHz operation with <1.0 dB receive insertion loss and –43 dBm non-harmonic spurious emission.
Technical Context
The SKY65377-21 implements a fully integrated T/R chain with a saturated PA optimized for 450–470 MHz ISM band operation, internally matched to 50 Ω at all RF ports (TX, RX, ANT), and featuring an integrated harmonic filter between PA and antenna switch. Its control logic uses two digital inputs (TR and EN) to select among transmit, receive, or shutdown modes per a defined truth table.
Transmit output power is adjusted via analog voltage (VPC = 0–3.6 V), delivering up to 50 dB of dynamic control range; receive path provides +30 dBm IIP3 and >20 dB input/output return loss. Quiescent current in shutdown mode is 0.6 μA (TX supply) and 3.6 μA (RX supply), enabling ultra-low-power sleep states in battery-operated AMR nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Range | 450–470 MHz - supports full ISM band allocation for automated meter reading and AMI infrastructure. |
| Transmit Output Power | +30 dBm at antenna port - sufficient for >1 km line-of-sight range extension without external amplification. |
| Power Added Efficiency | 40% at +30 dBm - reduces thermal load and extends battery life in portable or energy-constrained nodes. |
| Receive Insertion Loss | 0.5–1.0 dB - preserves receiver sensitivity by minimizing signal attenuation in the front-end path. |
| IIP3 (Receive) | +30 dBm - enables robust operation in dense RF environments with strong interferers near-band. |
| Output Power Control Range | 40–50 dB via VPC pin (0–3.6 V) - allows precise closed-loop transmit power management without external DAC. |
| Shutdown Current | 0.6 μA (TX supplies), 3.6 μA (RX supply) - supports multi-year battery operation in wake-on-RX applications. |
Pinout & Package
SKY65377-21 is housed in a 28-pin, 6 × 6 mm Multi-Chip Module (MCM) surface-mount package (MSL3, 260 °C reflow compatible), with exposed ground paddle for thermal and electrical performance. All RF ports (TX, RX, ANT) are internally DC-blocked and 50 Ω matched.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 6, 8–9, 11–12, 15, 19–22, 27–28 | GND | 21 dedicated ground terminals - ensure low-impedance RF return paths and minimize switching noise coupling. |
| 2 | TR | Digital control input for T/R mode selection - high = TX, low = RX; defines PA and switch state. |
| 3 | EN | Digital enable/shutdown input - low = full shutdown (sub-μA quiescent), high = active mode. |
| 5 | VPC | Analog voltage input (0–3.6 V) controlling PA output power - no external DAC required for closed-loop control. |
| 7 | ANT | Antenna common port - internally matched to 50 Ω, DC-blocked, and connected to harmonic filter output. |
| 16 | VDD1 | 3.6 V digital supply (3.0–3.8 V) powering control logic and EN/TR interface circuitry. |
| 20 | TX | Transmit input port - internally matched to 50 Ω; accepts +5 dBm max RF input before saturation. |
| 18 | RX | Receive output port - internally matched to 50 Ω; delivers low-loss path to baseband/LNA with >20 dB return loss. |
| 24–26 | VCC_TX1/2/3 | Three independent 3.6 V PA supply pins - decoupled routing minimizes supply noise coupling into RF path. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated T/R Front-End | Combines PA, T/R switch, harmonic filter, and match networks - eliminates 12+ discrete components and matching complexity. |
| High-Efficiency Saturated PA | 40% PAE at +30 dBm output - reduces heat dissipation and enables compact PCB layouts in sealed enclosures. |
| Analog Transmit Power Control | VPC pin accepts 0–3.6 V DC to adjust output over 40–50 dB range - replaces digital step attenuators and calibration tables. |
| Ultra-Low Shutdown Current | 0.6 μA on TX supplies - extends battery life in intermittent-transmit AMR endpoints beyond 10 years. |
| Internal 50 Ω Matching | All RF ports (TX, RX, ANT) are factory-matched to 50 Ω - removes need for external matching networks and layout tuning. |
| DC-Blocked RF Ports | Eliminates external DC blocking capacitors - saves board space and avoids capacitor-induced impedance discontinuities. |
Applications
| Automated Meter Reading (AMR) | Advanced Metering Infrastructure (AMI) |
|---|---|
Use Scenario: Battery-powered gas/water meters transmitting consumption data hourly via sub-GHz ISM band. IC Role / Device Role / Timing Role: Full T/R FEM handling both uplink transmission and downlink command reception in half-duplex mode. Use Value: +30 dBm output ensures reliable 1–2 km range through building walls; 0.6 μA shutdown current enables >10-year battery life. |
Use Scenario: Two-way communication node in neighborhood-area AMI mesh network with remote firmware updates. IC Role / Device Role / Timing Role: Integrated front-end enabling rapid T/R switching (<4.2 μs transition) for time-synchronized TDMA slots. Use Value: Internal harmonic filtering meets FCC Part 15.247 spectral mask without external filters; 20 dB RX return loss prevents LNA desense. |
| ISM Band Range Extender | Low-Power Sensor Network Hub |
Use Scenario: Outdoor repeater extending coverage of legacy 450 MHz SCADA radios in rural utility grids. IC Role / Device Role / Timing Role: High-linearity receive path (+30 dBm IIP3) and high-output transmit stage operating in same frequency band. Use Value: 1.0 dB receive insertion loss preserves weak signal SNR; 40% PAE minimizes solar/battery power draw during extended transmit bursts. |
Use Scenario: Gateway aggregating data from hundreds of LPWAN sensors using adaptive duty cycling. IC Role / Device Role / Timing Role: Low-quiescent-current FEM supporting wake-on-RX architecture with microsecond-level power-state transitions. Use Value: 2.6 μs power-on time enables fast response to incoming beacons; shutdown mode draws <4 μA total system current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar T/R front-end module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Qorvo QPF4559 | 450–512 MHz range; +31 dBm POUT; requires external VCO and separate LNA; 32-pin 6 × 6 mm package. | Higher frequency flexibility but lacks integrated receive path - needs companion LNA for full T/R function. | Choose QPF4559 only if extending beyond 470 MHz or requiring external LNA optimization. |
| Skyworks SKY65377-31 | Same die, different MCM variant: 32-pin 6 × 6 mm package with additional VCC and GND pins; identical RF specs and pin functions. | Offers enhanced thermal dissipation and lower ground inductance - preferred for continuous-duty industrial gateways. | Choose SKY65377-31 when board layout allows larger pad count and thermal vias are critical for >10% duty cycle operation. |
Compared with QPF4559 and SKY65377-31, the SKY65377-21 provides the most compact, self-contained 450–470 MHz T/R solution with lowest BOM count and fastest time-to-market for AMR/AMI designs - while SKY65377-31 adds thermal headroom and QPF4559 trades integration for wider frequency coverage.
Availability
SKY65377-21 is available at Aetrix Electronics and suitable for automated meter reading, advanced metering infrastructure, and ISM-band range extender applications requiring stable component supply, long-term lifecycle support, and consistent MSL3-compliant packaging.
Supply support for SKY65377-21 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
Skyworks Solutions is a global leader in high-performance analog semiconductors, specializing in RF, mobile, and infrastructure connectivity solutions with emphasis on power efficiency and integration.
The SKY65377-21 belongs to Skyworks' front-end module product line, engineered specifically for sub-GHz IoT and smart utility applications demanding high output power, ultra-low standby current, and minimal external component count.
FAQ
What is the operating frequency range of the SKY65377-21?
The SKY65377-21 operates across 450–470 MHz, covering the full unlicensed ISM band used in North American automated meter reading and AMI deployments. Its internal matching and filtering are optimized for this range, delivering +30 dBm output and <1.0 dB receive insertion loss within these limits. Performance outside this band is not characterized or guaranteed.
Does the SKY65377-21 require external matching components?
No, the SKY65377-21 does not require external matching components on its RF ports: TX, RX, and ANT are all internally matched to 50 Ω and DC-blocked. This eliminates the need for external baluns, series/shunt capacitors, or microstrip tuning - reducing bill-of-materials cost and layout sensitivity while improving first-pass yield.
How is transmit power controlled on the SKY65377-21?
Transmit power on the SKY65377-21 is controlled via the VPC pin (Pin 5), which accepts a 0–3.6 V analog voltage. A 3.6 V input yields maximum +30 dBm output; 0 V reduces output by 40–50 dB. The nominal input impedance is 50 kΩ, allowing direct connection to MCU GPIOs or DAC outputs without buffering.
What are the power supply requirements for the SKY65377-21?
The SKY65377-21 requires two distinct supply domains: a 3.0–3.8 V digital supply (VDD1, Pin 16) for control logic, and three independent 3.4–3.8 V PA supplies (VCC_TX1/2/3, Pins 24–26). Each VCC_TX pin must be individually decoupled with ≥10 μF bulk and 100 nF RF capacitors placed close to the package.
Can the SKY65377-21 be used in battery-powered applications?
Yes, the SKY65377-21 is explicitly designed for battery-powered applications: it draws only 0.6 μA from its PA supplies and 3.6 μA from its RX supply in shutdown mode, and transitions to full operation in 2.6 μs. Its 40% PAE at +30 dBm further extends operational lifetime - validated for >10-year deployment in AMR endpoints.
SKY65377-21 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Last Time Buy
- RF Type:
- ISM
- Frequency:
- 450MHz ~ 470MHz
- Features:
- -
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 28-MCM (6x6)
SKY65377-21 FAQ
1.How can I place an order for SKY65377-21 through Aetrix?
Please submit a Request for Quotation (RFQ) for SKY65377-21 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 SKY65377-21 reliable?
The price and inventory of SKY65377-21 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SKY65377-21 is usually 5 days.
3.What payment methods are accepted for SKY65377-21?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SKY65377-21 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SKY65377-21?
SKY65377-21 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SKY65377-21 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 SKY65377-21?
For technical support, including SKY65377-21 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SKY65377-21 requirements.
6.How does Aetrix verify that SKY65377-21 is sourced from the original manufacturer or authorized distributors?
All SKY65377-21 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 SKY65377-21 meets industry standards.
7.What is the process for return or replacement of SKY65377-21?
All SKY65377-21 units undergo pre-shipment inspection (PSI). If there is an issue with SKY65377-21, 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 SKY65377-21 part is unused and in its original packaging.
Return procedure for SKY65377-21:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SKY65377-21 Tags
-
RFX2401C
Skyworks Solutions Inc.
.jpg)
-
NRF21540-QDAA-R
Nordic Semiconductor ASA
-
NRF21540-QDAA-R7
Nordic Semiconductor ASA
-
RFX2411N
Skyworks Solutions Inc.
-
SE2438T-R
Skyworks Solutions Inc.
-
SKY66118-11
Skyworks Solutions Inc.
-
SKY85712-21
Skyworks Solutions Inc.
-
SKY85329-11
Skyworks Solutions Inc.
-
SKY66422-11
Skyworks Solutions Inc.
-
SKY66119-11
Skyworks Solutions Inc.
-
NJG1156PCD-TE1
Nisshinbo Micro Devices Inc.
-
SE2435L-R
Skyworks Solutions Inc.
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
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…
