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Analog Devices Inc. HMC545ATR
- Part No.:
- HMC545ATR
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF Switches
- Package:
- SOT-23-6
- Datasheet:
-
HMC545ATR.pdf
- Description:
- IC RF SWITCH SPDT 3GHZ SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,287
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Product details
Overview
HMC545ATR from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC SPDT RF switch operating from DC to 3 GHz, featuring 0.27 dB typical insertion loss at 1 GHz, +54 dBm input IP3 at +5 V control, and SOT-26 packaging. It serves as a high-linearity, low-loss signal path selector in cellular/3G infrastructure and WLAN front-ends.
For engineers reviewing the HMC545ATR datasheet, HMC545ATR pinout, HMC545ATR application, or HMC545ATR equivalent, key selection criteria include its CMOS/TTL-compatible positive control (0/+3V to 0/+8V), reflective-off-state architecture (RF1/RF2 short when disabled), and thermal resistance of 169°C/W for compact RF module designs.
Technical Context
The HMC545ATR implements a monolithic GaAs pHEMT-based SPDT switch with reflective termination on unselected paths-RF1 and RF2 present short circuits when off, minimizing isolation degradation at low frequencies. Its control logic uses two independent CMOS/TTL-compatible inputs (A and B) with truth-table-defined RFC-to-RF1 or RFC-to-RT2 routing.
DC blocking capacitors are mandatory at all three RF ports (RFC, RF1, RF2), and operation requires strict adherence to absolute maximum ratings: −0.2 to +12 Vdc control voltage, +34 dBm max RF input power (at 0/+8 V), and −40°C to +85°C operating temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Range | DC to 3.0 GHz - supports IF and RF switching across cellular, ISM, and WiMAX bands without harmonic filtering. |
| Insertion Loss (1 GHz) | 0.27 dB typ - enables minimal signal attenuation in receiver LNA bypass or antenna diversity paths. |
| Input IP3 (0/+5 V) | +54 dBm - ensures high linearity in multi-tone environments like base station transceivers. |
| Isolation (1 GHz) | 31 dB min - prevents crosstalk between RF1 and RF2 paths during simultaneous transmit/receive operation. |
| Control Voltage Range | 0/+3 V to 0/+8 V - allows direct interface with HC, HCT, and higher-voltage CMOS logic without level-shifting. |
| Switching Time | 70 ns tRISE/tFALL - supports fast TDD mode transitions in LTE and 5G NR time-division systems. |
| Thermal Resistance | 169°C/W - defines junction-to-case thermal performance under continuous +34 dBm hot-switch conditions. |
Pinout & Package
Package: SOT-26 (6-lead plastic, RoHS-compliant matte Sn finish, MSL1, 260°C peak reflow). Dimensions per Hittite outline drawing: 2.9 mm × 1.6 mm × 1.1 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5 | RF2 / RF1 / RFC | DC-coupled 50 Ω RF ports requiring external DC blocking capacitors; RFC is common port, RF1/RF2 are selectable outputs. |
| 2 | GND | RF/DC ground reference; must be soldered directly to PCB ground plane per RF layout best practices. |
| 4 | B | Logic control input; low/high state selects RFC→RF1 or RFC→RF2 per truth table; draws ≤14 µA at +8 V. |
| 6 | A | Logic control input; complements B to define switch state; compatible with 3–8 V CMOS/TTL drive levels. |
Key Features
| Feature | Design Value |
|---|---|
| Reflective Off-State | RF1 and RF2 present DC shorts when deselected-enables simple impedance matching and eliminates need for external termination resistors. |
| Ultra-Low Insertion Loss | 0.25 dB typical at 1 GHz reduces system noise figure impact in LNA bypass and filter bank switching applications. |
| High Input Linearity | +54 dBm IP3 at +5 V control sustains dynamic range in multi-carrier cellular base stations without distortion-induced intermodulation. |
| CMOS/TTL Compatibility | 0/+3 V to 0/+8 V control range allows direct interfacing with standard logic families-no external level shifters required. |
| Small Footprint | SOT-26 package (2.9 × 1.6 mm) saves board space in portable radios, automotive telematics modules, and compact test equipment. |
Applications
| Cellular/3G Infrastructure | WLAN/WiMAX Front-End |
|---|---|
Use Scenario: Antenna diversity switching in macrocell BTS transceivers handling multiple frequency bands and modulation schemes. IC Role / Device Role / Timing Role: SPDT RF path selector routing transmit/receive signals between dual antennas and shared transceiver chain. Use Value: 0.27 dB insertion loss preserves EVM and ACLR performance; +54 dBm IP3 prevents intermodulation in multi-carrier deployments. | Use Scenario: Dual-band 2.4/5 GHz access point RF front-end supporting concurrent 802.11n/ac operation with MIMO antenna arrays. IC Role / Device Role / Timing Role: High-isolation RF switch enabling band-selective signal routing between PA/LNA chains and antenna ports. Use Value: 31 dB isolation at 2.4 GHz suppresses cross-band interference; 70 ns switching supports fast channel hopping. |
| Automotive Telematics | Portable Radio Test Equipment |
Use Scenario: GNSS + cellular coexistence in vehicle infotainment units where GPS L1 (1.575 GHz) and LTE Band 13 (746–756 MHz) share antenna resources. IC Role / Device Role / Timing Role: Low-loss RF switch isolating GNSS receiver path from cellular transmitter during active transmission. Use Value: Reflective-off behavior simplifies matching network design; −40°C to +85°C rating ensures reliability in under-hood environments. | Use Scenario: Automated RF path calibration in benchtop vector signal analyzers requiring rapid, repeatable signal routing between DUT ports and measurement chains. IC Role / Device Role / Timing Role: Precision-controlled SPDT switch enabling traceable signal path selection without mechanical relay wear. Use Value: 0.27 dB loss stability over temperature ensures measurement repeatability; 169°C/W thermal resistance supports continuous 30 dBm test signal duty cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPDT RF switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Qorvo QM11036 | 0.35 dB IL @ 2.4 GHz; +48 dBm IP3; 2.0 × 1.6 mm DFN package; requires negative gate bias for optimal linearity. | Optimized for 5G FR1 sub-6 GHz; lower IP3 limits use in high-power macrocell base stations. | Select QM11036 when footprint size is critical and control voltage is constrained to 0/+3.3 V only. |
| Skyworks SKY13370-374LF | 0.45 dB IL @ 2.4 GHz; +50 dBm IP3; 2.0 × 2.0 mm QFN; integrated DC blocking caps on RF ports. | Designed for consumer WLAN/BT combo modules; lacks reflective-off architecture-requires external terminations. | Choose SKY13370-374LF for simplified layout in cost-sensitive portable designs where external capacitors are undesirable. |
Compared with QM11036 and SKY13370-374LF, the HMC545ATR delivers superior insertion loss and IP3 at 3 GHz while retaining reflective-off operation-making it preferred for high-performance infrastructure and test equipment where signal integrity and thermal robustness are critical.
Availability
HMC545ATR is available at Aetrix Electronics and suitable for cellular infrastructure, WLAN front-ends, and automotive telematics requiring stable component supply, consistent RF performance across temperature, and long-term lifecycle support.
Supply support for HMC545ATR 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 integrates its high-frequency RF portfolio into precision analog and RF solutions for communications, defense, and instrumentation markets.
The HMC545ATR belongs to Hittite's GaAs MMIC SPDT switch product line, engineered for ultra-low-loss, high-linearity RF path selection in infrastructure-grade wireless systems operating up to 3 GHz.
FAQ
What is the recommended DC blocking capacitor value for HMC545ATR RF ports?
Per Hittite application notes, 330 pF 0402 capacitors are used on the EV1HMC545A evaluation board and support operation down to ~100 MHz. For DC–1 GHz use, ≥1000 pF is recommended; for 2–3 GHz, 100–330 pF provides optimal impedance match and insertion loss. All RF ports (RFC, RF1, RF2) require DC blocking-no internal capacitors exist in the HMC545ATR die.
Does HMC545ATR support hot switching at +34 dBm?
Yes-the HMC545ATR is rated for +34 dBm RF input power with 0/+8 V control and +32 dBm hot-switch power level under same conditions. This capability is validated per absolute maximum ratings and enables use in high-power TDD transceivers without external attenuators or protection circuits, provided thermal management maintains junction temperature below 150°C.
What is the function of Pin 2 (GND) in HMC545ATR?
Pin 2 is the primary RF/DC ground terminal and must be soldered directly to the PCB ground plane using multiple vias. It serves as the reference for all RF ports and control inputs. Improper grounding causes degraded return loss (<17 dB at 3 GHz) and increased insertion loss due to parasitic inductance-Hittite specifies this connection as mandatory in all layouts.
How does HMC545ATR behave when both control inputs A and B are low?
When both A and B are low (0 V), the HMC545ATR enters a defined "off" state per its truth table: RFC is isolated from both RF1 and RF2. In this condition, RF1 and RF2 present reflective shorts, and RFC exhibits >26 dB return loss. This state is used for RF path shutdown or system-level power-down sequencing in battery-operated devices.
Is HMC545ATR pin-compatible with HMC545AE?
Yes-HMC545ATR and HMC545AE share identical SOT-26 pinout, electrical specifications, and functional behavior. The difference lies solely in packaging: HMC545ATR uses Sn/Pb lead finish (MSL1, 235°C peak), while HMC545AE is RoHS-compliant with 100% matte Sn (MSL1, 260°C peak). Both are drop-in replacements in legacy and new designs respecting their respective reflow profiles.
HMC545ATR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- RF Type:
- WiMax, WLAN
- Topology:
- -
- Circuit:
- SPDT
- Frequency Range:
- 0Hz ~ 3GHz
- Isolation:
- 22dB
- Insertion Loss:
- 0.4dB
- Test Frequency:
- 3GHz
- P1dB:
- 33dBm
- IIP3:
- 54dBm
- Features:
- -
- Impedance:
- 50Ohm
- Voltage - Supply:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
HMC545ATR FAQ
1.How can I place an order for HMC545ATR through Aetrix?
Please submit a Request for Quotation (RFQ) for HMC545ATR 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 HMC545ATR reliable?
The price and inventory of HMC545ATR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HMC545ATR is usually 5 days.
3.What payment methods are accepted for HMC545ATR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HMC545ATR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HMC545ATR?
HMC545ATR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HMC545ATR 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 HMC545ATR?
For technical support, including HMC545ATR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HMC545ATR requirements.
6.How does Aetrix verify that HMC545ATR is sourced from the original manufacturer or authorized distributors?
All HMC545ATR 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 HMC545ATR meets industry standards.
7.What is the process for return or replacement of HMC545ATR?
All HMC545ATR units undergo pre-shipment inspection (PSI). If there is an issue with HMC545ATR, 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 HMC545ATR part is unused and in its original packaging.
Return procedure for HMC545ATR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HMC545ATR Tags
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