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Analog Devices Inc. HMC446ETR
- Part No.:
- HMC446ETR
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF Switches
- Package:
- SOT-23-6
- Datasheet:
-
HMC446ETR.pdf
- Description:
- IC RF SWITCH SPDT 894MHZ SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,199
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Product details
Overview
HMC446ETR from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC SPDT T/R switch in SOT-26 package, operating from 824–894 MHz with 0.6 dB typical Tx insertion loss, +40 dBm P0.1dB on Tx, and +65 dBm IIP3 - designed for high-power cellular booster and automotive telematics transmit-receive path switching.
For engineers reviewing the HMC446ETR datasheet, HMC446ETR pinout, HMC446ETR application, or HMC446ETR equivalent, key selection criteria include its 10W RF handling capability, positive 0/+8 V control logic, reflective open-Tx / short-Rx off-state behavior, and requirement for external DC blocking capacitors and RF chokes per application circuit.
Technical Context
The HMC446ETR integrates GaAs pHEMT switching elements with on-chip bias control to enable single-supply (+5 to +8 V) operation and low DC current draw. Its architecture delivers asymmetric RF path performance: Tx port supports +40 dBm P0.1dB and +65 dBm IIP3, while Rx port is rated for +30 dBm P0.1dB and +52 dBm IIP3 at 824–894 MHz.
Switching is controlled by a single TTL/CMOS-compatible Vctl input (0/+8 V), with tON/tOFF of 90 ns and tRISE/tFALL of 4 ns. The device requires external 330 pF DC blocking capacitors at RFC, Tx, and Rx ports, plus series inductors (22 nH on Tx–RFC, 8.2 nH on Rx–RFC) for proper biasing and isolation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Range | 824–894 MHz - optimized for North American cellular bands (PCS, Cellular) |
| Insertion Loss (Tx–RFC) | 0.6 dB typ - enables minimal signal attenuation in high-power transmit paths |
| P0.1dB Input Power (Tx) | +40 dBm (10 W) - supports high-efficiency PA output coupling without compression |
| IIP3 (Tx) | +65 dBm - ensures low intermodulation distortion in multi-tone cellular signals |
| Isolation (Tx–RFC) | 22 dB min @ 824–849 MHz - prevents Tx leakage into receive chain during transmission |
| Control Voltage | 0/+8 V - compatible with standard logic drivers without level-shifting circuitry |
| Switching Time | 90 ns tON/tOFF - suitable for TDMA-based burst-mode systems (e.g., GSM, LTE TDD) |
Pinout & Package
Package: SOT-26 (RoHS-compliant, matte Sn lead finish, MSL1, 260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Tx) | Transmit RF port | DC-coupled 50 Ω port; reflective open when OFF; handles +40 dBm continuous |
| 2 (GND) | RF ground terminal | Must be soldered directly to PCB RF ground plane with multiple vias |
| 3 (Vctl) | Logic control input | 0 V = Tx ON / Rx OFF; +8 V = Tx OFF / Rx ON; ±0.2 V tolerance |
| 4 (Rx) | Receive RF port | DC-coupled 50 Ω port; reflective short when OFF; rated for +30 dBm P0.1dB |
| 5 (Vdd) | Positive supply rail | +5.0 to +8.0 V DC; supplies internal bias circuitry; requires local decoupling |
| 6 (RFC) | Common RF port | DC-coupled 50 Ω antenna interface; connects to Tx or Rx based on Vctl state |
Key Features
| Feature | Design Value |
|---|---|
| High-Power T/R Switching | Supports 10W transmit power with +40 dBm P0.1dB and +65 dBm IIP3 - eliminates need for external circulators in compact boosters |
| Asymmetric Off-State Termination | Tx port presents reflective open, Rx port presents reflective short - improves isolation and return loss in respective states |
| Single Positive Supply Control | Operates from +5 to +8 V Vdd with 0/+8 V Vctl - simplifies system-level logic interface and reduces BOM count |
| Ultra-Small SOT-26 Footprint | 2.9 × 2.8 × 1.3 mm body - enables integration into space-constrained portable and automotive modules |
| Robust Absolute Ratings | 41 dBm max Tx input, -40 to +85 °C operating range, ESD-sensitive handling required - validated for industrial telematics environments |
Applications
| Cellular Signal Booster | Automotive Telematics Unit |
|---|---|
Use Scenario: Bi-directional amplification of cellular uplink/downlink in vehicle-mounted repeaters. IC Role / Device Role / Timing Role: SPDT T/R switch routing antenna between high-power PA and low-noise LNA under TDMA timing control. Use Value: Enables full-duplex-like operation using single antenna with >22 dB Tx–Rx isolation and <0.6 dB Tx loss - critical for preventing PA self-oscillation and receiver desense. | Use Scenario: Integrated cellular/V2X module in automotive infotainment or ADAS gateway. IC Role / Device Role / Timing Role: Antenna sharing switch between LTE modem and GNSS receiver or DSRC/WAVE transceiver. Use Value: Provides +40 dBm Tx handling and +52 dBm Rx IIP3 within same 6-pin SOT-26 footprint - reduces layer count and improves thermal management vs. discrete switch solutions. |
| ISM Band Portable Radio | Public Safety Mobile Radio |
Use Scenario: Handheld two-way radios operating in 824–894 MHz ISM or licensed bands. IC Role / Device Role / Timing Role: Transmit/receive path selector synchronized with PTT signal and PA enable. Use Value: Delivers 90 ns switching time and 4 ns edge rate - meets fast PTT response requirements while maintaining >13 dB return loss across temperature (-40 to +85 °C). | Use Scenario: Ruggedized mobile radios for first responders requiring high reliability and RF robustness. IC Role / Device Role / Timing Role: High-isolation antenna switch protecting sensitive receiver front-end from 10W transmit bursts. Use Value: With 35 dB Rx–RFC isolation and reflective short-off Rx termination, suppresses Tx leakage-induced front-end saturation - extends LNA MTBF in mission-critical deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPDT T/R switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Qorvo QM11025 | Wider band (700–2700 MHz), lower P0.1dB (+33 dBm Tx), uses 3.3 V control | Targets multi-band LTE/5G handsets; not optimized for 824–894 MHz 10W fixed-band use | Choose for frequency flexibility and lower voltage control; avoid if +40 dBm Tx linearity is mandatory |
| Skyworks SKY13372-378LF | Same SOT-26 package, +36 dBm Tx P0.1dB, +58 dBm Tx IIP3, 0/+5 V control | Designed for smartphone front-end modules; lower power handling than HMC446ETR | Choose for cost-sensitive consumer designs with <5W Tx requirement; verify isolation specs at 849 MHz before substitution |
Compared with QM11025 and SKY13372-378LF, the HMC446ETR provides superior +40 dBm P0.1dB and +65 dBm IIP3 specifically in the 824–894 MHz band, making it uniquely suited for high-linearity, high-power cellular booster and automotive telematics where spectral purity and PA protection are critical.
Availability
HMC446ETR is available at Aetrix Electronics and suitable for cellular signal boosters, automotive telematics units, public safety mobile radios, and ISM band portable radios requiring stable component supply and proven high-power RF switching performance.
Supply support for HMC446ETR 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
Analog Devices (acquired Hittite Microwave in 2014) is a global leader in high-performance analog, mixed-signal, and RF ICs for communications, industrial, and aerospace applications.
The HMC446ETR belongs to Hittite's legacy GaAs MMIC switch product line, engineered specifically for high-linearity, high-power T/R switching in licensed and ISM cellular infrastructure and mobile equipment.
FAQ
What is the maximum RF input power rating for the HMC446ETR Tx port?
The HMC446ETR Tx port has an absolute maximum RF input power rating of +41 dBm (12.6 W) at Vdd = +8 V and Vctl = 0/+8 V. Its typical P0.1dB compression point is +40 dBm (10 W) at 849 MHz, confirming reliable 10W continuous operation. Exceeding +41 dBm risks permanent damage, and continuous operation above +40 dBm is not recommended per datasheet guidance.
Does the HMC446ETR require external DC blocking capacitors?
Yes, the HMC446ETR requires external 330 pF DC blocking capacitors at all three RF ports (RFC, Tx, and Rx) as specified in the application circuit. These capacitors prevent DC bias from propagating into connected components (e.g., PA, LNA, antenna) and ensure proper RF matching. Omission results in degraded return loss, increased insertion loss, and potential damage to downstream devices.
What is the off-state impedance behavior of the HMC446ETR Tx and Rx ports?
When the HMC446ETR is in the OFF state, the Tx port presents a reflective open circuit and the Rx port presents a reflective short circuit. This asymmetry enhances isolation: Tx–RFC isolation reaches 22 dB min, while RFC–Rx isolation reaches 35 dB min. The behavior is intrinsic to the GaAs pHEMT design and does not require external tuning components.
Can the HMC446ETR operate outside the 824–894 MHz band?
Yes - the HMC446ETR can operate in other frequency bands by adjusting external component values (e.g., DC blocking capacitors and series inductors). The datasheet explicitly states that "external component values can be adjusted to enable HMC446 to operate in other frequency bands" and recommends contacting Analog Devices with specific requirements for optimized matching networks.
What is the recommended PCB layout practice for the HMC446ETR ground connections?
All ground leads (Pin 2) of the HMC446ETR must be soldered directly to the PCB RF ground plane using multiple low-inductance vias. The evaluation PCB uses Rogers 4350 substrate with controlled 50 Ω impedance traces and dense via stitching between top and bottom ground planes - this minimizes ground inductance and preserves RF performance, especially isolation and return loss across -40 to +85 °C.
HMC446ETR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- RF Type:
- ISM
- Topology:
- Reflective
- Circuit:
- SPDT
- Frequency Range:
- -
- Isolation:
- -
- Insertion Loss:
- -
- Test Frequency:
- -
- P1dB:
- -
- IIP3:
- 65dBm (typ)
- Features:
- -
- Impedance:
- 50Ohm
- Voltage - Supply:
- 5V ~ 8V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
HMC446ETR FAQ
1.How can I place an order for HMC446ETR through Aetrix?
Please submit a Request for Quotation (RFQ) for HMC446ETR 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 HMC446ETR reliable?
The price and inventory of HMC446ETR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HMC446ETR is usually 5 days.
3.What payment methods are accepted for HMC446ETR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HMC446ETR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HMC446ETR?
HMC446ETR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HMC446ETR 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 HMC446ETR?
For technical support, including HMC446ETR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HMC446ETR requirements.
6.How does Aetrix verify that HMC446ETR is sourced from the original manufacturer or authorized distributors?
All HMC446ETR 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 HMC446ETR meets industry standards.
7.What is the process for return or replacement of HMC446ETR?
All HMC446ETR units undergo pre-shipment inspection (PSI). If there is an issue with HMC446ETR, 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 HMC446ETR part is unused and in its original packaging.
Return procedure for HMC446ETR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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