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Analog Devices Inc. HMC544ETR
- Part No.:
- HMC544ETR
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF Switches
- Package:
- SOT-23-6
- Datasheet:
-
HMC544ETR.pdf
- Description:
- IC RF SWITCH SPDT 4GHZ SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,483
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Product details
Overview
HMC544ETR from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC SPDT T/R switch for DC–4 GHz RF front-end signal routing in cellular infrastructure and wireless radios. It delivers 0.2 dB insertion loss at 1.0 GHz, +39 dBm input P1dB, and +55 dBm IP3 under +3 V control, with reflective-open "Off" states at RF1/RF2 and positive 0/+3 V or 0/+5 V logic control.
For engineers reviewing the HMC544ETR datasheet, HMC544ETR pinout, HMC544ETR application, or HMC544ETR equivalent, this page provides verified package mapping (SOT-26), functional truth table, thermal limits (−40°C to +85°C), RF port DC blocking requirements, and real-world linearity performance across temperature and voltage.
Technical Context
The HMC544ETR implements a monolithic GaAs pHEMT architecture optimized for transmit-receive switching in FDD systems, supporting bidirectional RF path selection between RFC and either RF1 or RF2. Its on-chip bias network enables low-current positive control (≤2 µA at +5 V) without external level-shifting circuitry.
RF ports are DC-coupled and require external blocking capacitors; all ground leads (pins 1, 3, 5) must be soldered directly to PCB RF ground per layout guidelines. Isolation between RFC and RF1/RF2 exceeds 12 dB up to 4 GHz, while RF1–RF2 isolation remains >8 dB across full band.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Range | DC to 4.0 GHz - supports 450/900/1900/2300/2700 MHz bands with <0.5 dB insertion loss. |
| Insertion Loss (Typ.) | 0.2 dB @ 1.0 GHz - minimizes signal attenuation in high-gain receiver paths. |
| Input P1dB (Typ.) | +39 dBm @ 0/+5 V - handles medium-power transmit signals without compression in basestation TR modules. |
| Input IP3 (Typ.) | +55 dBm - ensures low intermodulation distortion in multi-carrier 3G/4G/WiMAX baseband environments. |
| Isolation (Min.) | 12 dB @ 4.0 GHz - prevents RF leakage between active and inactive paths during switching. |
| Switching Time | 70 ns tRISE/tFALL - enables fast TDD frame transitions in time-division duplex systems. |
| Operating Temp. | −40°C to +85°C - qualified for outdoor macrocell and repeater deployments. |
Pinout & Package
Package: RoHS-compliant SOT-26 (6-lead), matte tin finish, MSL1 rating, max reflow 260°C. Ground leads (pins 1, 3, 5) must be soldered to RF ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RF2 | RF output port; reflective open when "Off"; requires DC blocking capacitor. |
| 2 | GND | RF/DC ground reference; must connect directly to PCB ground plane. |
| 3 | RF1 | RF output port; reflective open when "Off"; requires DC blocking capacitor. |
| 4 | B | Logic control input; 0 V = Low, +3/+5 V = High; drives internal GaAs switch core. |
| 5 | RFC | Common RF port; connects to antenna or transceiver; requires DC blocking capacitor. |
| 6 | A | Logic control input; complements B per truth table; enables RFC↔RF1 or RFC↔RF2 path selection. |
Key Features
| Feature | Design Value |
|---|---|
| Positive Control Interface | 0/+3 V or 0/+5 V logic compatible - eliminates need for negative bias or level shifters in CMOS/TTL-driven systems. |
| Reflective-Open Off-State | RF1 and RF2 present high-impedance open circuits when inactive - simplifies matching network design in shared-antenna architectures. |
| Low DC Power Consumption | ≤2 µA at +5 V control - reduces system standby current in battery-backed or energy-constrained repeaters. |
| Thermal Robustness | 140 °C/W θJA, 150 °C max channel temperature - supports continuous operation in sealed outdoor enclosures. |
| ESD Protection | HBM Class 1A (≥250 V) - meets handling requirements for automated SMT assembly lines. |
Applications
| Cellular Basestation TR Module | WiMAX Fixed Wireless Radio |
|---|---|
Use Scenario: Dual-path FDD transceiver sharing single antenna between Tx and Rx chains in 2.3–2.7 GHz band. IC Role / Device Role / Timing Role: SPDT T/R switch routing RF between power amplifier output and LNA input via common antenna port. Use Value: 0.2 dB insertion loss preserves Rx sensitivity; +39 dBm P1dB avoids Tx compression; reflective-off state prevents LNA desense during transmission. |
Use Scenario: Outdoor customer premise equipment (CPE) operating in 3.5 GHz WiMAX band with integrated Tx/Rx front-end. IC Role / Device Role / Timing Role: Antenna interface switch enabling time-synchronized Tx burst and Rx listening windows. Use Value: 70 ns switching speed aligns with WiMAX frame timing; +55 dBm IP3 maintains EVM under multi-tone interference. |
| PCS Band Repeater | WLAN Access Point Front-End |
Use Scenario: In-building signal booster amplifying 1850–1990 MHz PCS uplink/downlink with shared antenna. IC Role / Device Role / Timing Role: Bidirectional RF path selector isolating Tx and Rx paths to prevent self-interference. Use Value: 12 dB isolation at 1.9 GHz suppresses Tx leakage into Rx chain; −40°C to +85°C rating supports attic-mounted deployment. |
Use Scenario: Dual-band 2.4/5 GHz AP using single antenna for concurrent 802.11n/ac operation with MIMO diversity. IC Role / Device Role / Timing Role: RF path switch enabling antenna sharing between 2.4 GHz and 5 GHz transceivers. Use Value: DC–4 GHz bandwidth covers both ISM bands; compact SOT-26 footprint saves PCB area in space-constrained AP modules. |
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 QM11036 | Higher frequency range (DC–6 GHz); slightly higher insertion loss (0.35 dB @ 2.4 GHz); requires negative control voltage (−2.5 V). | Better suited for 5 GHz WLAN and 6 GHz WiGig; incompatible with positive-only logic interfaces. | Select QM11036 only if 6 GHz coverage is required and negative bias generation is available. |
| Skyworks SKY13370-374LF | Lower P1dB (+33 dBm); lower IP3 (+48 dBm); same SOT-26 package; 0/+3 V control compatible. | Targeted at lower-power portable devices; insufficient linearity for macro basestation Tx paths. | Choose SKY13370-374LF for cost-sensitive consumer-grade repeaters where +39 dBm P1dB is not required. |
Compared with QM11036 and SKY13370-374LF, the HMC544ETR uniquely balances +39 dBm P1dB, +55 dBm IP3, and 0/+3 V control in a legacy-compatible SOT-26 footprint-making it optimal for medium-power infrastructure where thermal headroom and linearity are critical.
Availability
HMC544ETR is available at Aetrix Electronics and suitable for cellular basestation TR modules, WiMAX fixed wireless radios, and PCS band repeaters requiring stable component supply across extended temperature ranges and high linearity performance.
Supply support for HMC544ETR 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 and continues its high-frequency RF IC portfolio, specializing in GaAs, SiGe, and RF SOI solutions for communications infrastructure.
The HMC544ETR belongs to Hittite's legacy GaAs MMIC SPDT switch family, engineered specifically for FDD-based cellular and broadband wireless infrastructure demanding low loss, high linearity, and robust thermal performance.
FAQ
What is the maximum RF input power the HMC544ETR can handle without damage?
The HMC544ETR has an absolute maximum RF input power rating of +39 dBm under 0/+5 V control conditions. This limit applies regardless of duty cycle and assumes proper DC blocking at all RF ports (RFC, RF1, RF2) and adherence to thermal derating above 85°C ambient. Exceeding this level risks permanent GaAs device degradation.
Does the HMC544ETR require external DC blocking capacitors on all RF ports?
Yes, the HMC544ETR requires external DC blocking capacitors on RFC, RF1, and RF2 because all three RF ports are DC-coupled. Capacitor value determines the low-frequency cutoff-330 pF (as used on Hittite's eval board 101675) supports operation down to ~450 MHz. Failure to include these capacitors may cause bias disruption or damage.
Can the HMC544ETR operate with only +3 V control, or is +5 V required for full performance?
The HMC544ETR operates fully with +3 V control: P1dB is +36 dBm and IP3 remains +55 dBm at 0/+3 V. While +5 V raises P1dB to +39 dBm, the +3 V configuration is sufficient for most repeater and small-cell applications and reduces system power supply complexity.
What is the meaning of "reflective open" for RF1 and RF2 in the HMC544ETR datasheet?
"Reflective open" means that when RF1 or RF2 is in the "Off" state, its port presents a high-impedance, non-absorptive termination-essentially an open circuit that reflects incident RF energy rather than dissipating it. This simplifies impedance matching but requires careful system-level isolation design to manage reflected signals.
Is the HMC544ETR pin-compatible with the standard SOT-26 footprint used by other RF switches?
Yes, the HMC544ETR uses the industry-standard 6-lead SOT-26 package with 0.95 mm lead pitch and defined mechanical dimensions per its outline drawing. Pin numbering and functions (RFC, RF1, RF2, GND, A, B) match the JEDEC MO-178 variant, enabling direct PCB footprint reuse across compatible SPDT switches.
HMC544ETR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- RF Type:
- General Purpose
- Topology:
- Reflective
- Circuit:
- SPDT
- Frequency Range:
- 0Hz ~ 4GHz
- Isolation:
- 12dB
- Insertion Loss:
- 0.7dB
- Test Frequency:
- 4GHz
- P1dB:
- 36dBm
- IIP3:
- 55dBm
- Features:
- -
- Impedance:
- 50Ohm
- Voltage - Supply:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
HMC544ETR FAQ
1.How can I place an order for HMC544ETR through Aetrix?
Please submit a Request for Quotation (RFQ) for HMC544ETR 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 HMC544ETR reliable?
The price and inventory of HMC544ETR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HMC544ETR is usually 5 days.
3.What payment methods are accepted for HMC544ETR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HMC544ETR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HMC544ETR?
HMC544ETR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HMC544ETR 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 HMC544ETR?
For technical support, including HMC544ETR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HMC544ETR requirements.
6.How does Aetrix verify that HMC544ETR is sourced from the original manufacturer or authorized distributors?
All HMC544ETR 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 HMC544ETR meets industry standards.
7.What is the process for return or replacement of HMC544ETR?
All HMC544ETR units undergo pre-shipment inspection (PSI). If there is an issue with HMC544ETR, 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 HMC544ETR part is unused and in its original packaging.
Return procedure for HMC544ETR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HMC544ETR Tags
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