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Analog Devices Inc. 101675-HMC221A
- Part No.:
- 101675-HMC221A
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF, RFID, Wireless Evaluation Boards
- Package:
- Datasheet:
-
101675-HMC221A.pdf
- Description:
- BOARD EVAL SWITCH SPDT HMC221A
- Quantity:
- Payment:
- Shipping:
Inventory:4,688
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Product details
Overview
HMC221A from Hittite Microwave Corporation is a GaAs MMIC SPDT RF switch in SOT26 package, operating from DC to 3 GHz with 0.4 dB typical insertion loss at 1 GHz, +45 dBm input IP3, and positive 0/+3 V control logic. It serves as a reflective RF path selector in ISM-band front-ends, PCMCIA wireless cards, and cellular transceiver modules.
For engineers reviewing the HMC221A datasheet, HMC221A pinout, HMC221A application, or HMC221A equivalent, key selection criteria include its SOT26 footprint, 0/+3 V CMOS/TTL-compatible control, sub-1 dB loss up to 2.5 GHz, and reflective OFF-state behavior at RF1/RF2 ports.
Technical Context
The HMC221A implements a monolithic GaAs MMIC architecture with two reflective SPDT paths controlled by complementary 0/+3 V logic inputs. Its design enables simultaneous low-loss signal routing and high isolation (28 dB @ 1 GHz) without external bias networks.
Control voltage tolerance is ±0.2 Vdc; switching speed is 3 ns rise/fall and 10 ns ON/OFF delay. RF ports require DC blocking capacitors, and operation above +31 dBm at Vctl = +5 Vdc is prohibited per absolute maximum ratings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Range | DC to 3 GHz - supports full ISM bands (900 MHz, 2.4 GHz) and cellular bands (1.8–2.2 GHz) |
| Insertion Loss | 0.4 dB typ @ 1 GHz - enables minimal signal attenuation in receiver filter switching paths |
| Isolation | 28 dB typ @ 1 GHz - ensures strong suppression of leakage between RF1 and RF2 when off |
| Input IP3 | +45 dBm typ @ 900 MHz - maintains linearity under multi-tone interference in baseband-coupled systems |
| Control Logic | 0/+3 V @ 3 µA - directly interfaces with HC/HCT logic families without level-shifting circuitry |
| Switching Speed | tRISE/tFALL = 3 ns - supports fast TDD mode transitions in time-division duplexed radios |
| Operating Temp | −40 °C to +105 °C - qualified for industrial and extended-temperature wireless infrastructure use |
Pinout & Package
SOT26 plastic package (3.0 × 1.7 × 1.3 mm), RoHS-compliant (HMC221AE variant), MSL1, Sn/Pb lead finish for HMC221A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A) | Control Input A | Active-high enable for RF→RF1 path; 0/+3 V logic compatible |
| 2 (GND) | Ground | RF and DC ground reference; must be soldered to PCB ground plane |
| 3 (RF1) | RF Output 1 | Reflective OFF-state port; requires DC blocking capacitor |
| 4 (RFC) | RF Common Input | Single-pole input shared by both switched paths |
| 5 (RF2) | RF Output 2 | Reflective OFF-state port; requires DC blocking capacitor |
| 6 (B) | Control Input B | Complementary to A; 0/+3 V logic determines RF→RF2 path activation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low insertion loss | 0.4 dB typ @ 1 GHz - reduces cascaded noise figure in LNA/filter chains |
| Reflective OFF-state architecture | RF1 and RF2 present short circuits when inactive - eliminates need for termination resistors |
| CMOS/TTL-compatible control | 3 µA max control current at 0/+3 V - enables direct drive from microcontroller GPIOs |
| Small-footprint SOT26 package | 3.0 × 1.7 mm body - fits dense RF layouts in PCMCIA cards and compact IoT modules |
| High linearity | +45 dBm IP3 @ 900 MHz - preserves signal integrity in multi-carrier ISM applications |
Applications
| ISM Band Transceivers | PCMCIA Wireless Cards |
|---|---|
Use Scenario: Dual-band (900 MHz / 2.4 GHz) ISM transceiver requiring antenna switching between TX/RX paths and band-select filters. IC Role / Device Role / Timing Role: Reflective SPDT RF switch selecting between antenna and filter banks with <1 dB loss up to 2.5 GHz. Use Value: Enables single-antenna dual-band operation while maintaining ETSI/FCC spectral mask compliance via low-loss, high-isolation path separation. | Use Scenario: Mini-PCI wireless adapter needing compact RF path reconfiguration for diversity receive and transmit power control. IC Role / Device Role / Timing Role: Low-power SPDT switch routing RF between main/diversity antennas and PA/LNA stages. Use Value: Reduces board area by 40% vs. larger SOIC switches while delivering 28 dB isolation to suppress cross-talk in MIMO configurations. |
| Cellular Handset Front-Ends | Industrial Wireless Sensors |
Use Scenario: 1.8–2.2 GHz LTE handset front-end requiring fast TDD switching between transmit and receive chains. IC Role / Device Role / Timing Role: High-speed SPDT switch enabling sub-10 ns path transition during UL/DL guard intervals. Use Value: Achieves 3 ns rise time and 10 ns ON/OFF delay - meets LTE TDD timing budget without added driver circuitry. | Use Scenario: Battery-powered LPWAN sensor node using 900 MHz ISM band, requiring ultra-low standby current and robust ESD protection. IC Role / Device Role / Timing Role: RF path selector with Class 1A HBM ESD rating and 3 µA control current for energy-efficient duty-cycled operation. Use Value: Extends battery life by minimizing control-side quiescent draw while surviving >2 kV ESD events common in factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPDT RF switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HMC197AE | Different SOT26 pinout (non-interchangeable); identical electrical specs and performance | Requires PCB layout revision due to swapped RF1/RF2 and control pin locations | Select HMC197AE only when redesigning for alternate routing or legacy compatibility |
| Qorvo QM11035 | Higher P1dB (+33 dBm vs. +30 dBm @ 1.9 GHz); same SOT26 footprint but different control voltage range (0/+2.7 V) | Better suited for higher-power IoT gateways; incompatible with 0/+3 V logic without level shift | Choose QM11035 when system demands >+30 dBm handling and can support 0/+2.7 V control interface |
Compared with HMC197AE and QM11035, the HMC221A offers optimal balance of low-loss switching, TTL/CMOS compatibility, and proven reliability in space-constrained ISM designs-without requiring layout changes or voltage translation.
Availability
HMC221A is available at Aetrix Electronics and suitable for ISM band transceivers, PCMCIA wireless cards, and cellular handset front-ends requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for HMC221A 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
Hittite Microwave Corporation was a U.S.-based RF/microwave semiconductor company specializing in high-performance GaAs and SiGe MMICs before its acquisition by Analog Devices in 2014.
The HMC221A belongs to Hittite's SPDT GaAs MMIC switch product line, engineered for low-loss, high-isolation RF path selection in compact wireless infrastructure and portable radio systems.
FAQ
What is the maximum RF input power the HMC221A can handle without compression?
The HMC221A delivers +30 dBm input power for 1 dB compression at 1.9 GHz when Vctl = +5 Vdc. At 900 MHz, it achieves +30 dBm P1dB under the same condition. Operation above +31 dBm at +5 Vdc violates absolute maximum ratings and risks permanent damage. Always apply DC blocking capacitors at RFC, RF1, and RF2 ports per datasheet guidance.
Does the HMC221A require external bias components or matching networks?
No, the HMC221A is a fully integrated GaAs MMIC switch with internal biasing. It requires only DC blocking capacitors at all three RF ports (RFC, RF1, RF2) and proper grounding of all package leads to the PCB ground plane. No external inductors, resistors, or matching networks are needed for basic operation across DC–3 GHz.
Is the HMC221A pin-compatible with the HMC221AE variant?
Yes, the HMC221A and HMC221AE share identical pinout, electrical specifications, and mechanical outline. The only difference is RoHS compliance: HMC221A uses Sn/Pb lead finish (MSL1, 235 °C peak reflow), while HMC221AE uses 100% matte tin (MSL1, 260 °C peak reflow). Both are drop-in replacements in compatible assembly processes.
What is the OFF-state behavior of RF1 and RF2 on the HMC221A?
When disabled, both RF1 and RF2 present reflective short circuits-not 50 Ω terminations. This eliminates the need for external termination resistors but requires careful system-level impedance management. The reflective nature is confirmed in the functional diagram and truth table, where "OFF" states show RF1 and RF2 isolated from RFC with no DC path.
Can the HMC221A be driven directly by a 3.3 V microcontroller GPIO?
Yes, the HMC221A accepts 0/+3 V control logic with ±0.2 V tolerance and draws only 3 µA per control input. A standard 3.3 V MCU GPIO (with VOH ≥ 2.8 V and VOL ≤ 0.4 V) meets these requirements without level-shifting circuitry, making it ideal for direct integration into embedded wireless modules.
101675-HMC221A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Bag
- Product Status:
- Obsolete
- Type:
- Switch, SPDT
- Frequency:
- 0Hz ~ 3GHz
- Contents:
- Board(s)
- Utilized IC / Part:
- HMC221A
101675-HMC221A FAQ
1.How can I place an order for 101675-HMC221A through Aetrix?
Please submit a Request for Quotation (RFQ) for 101675-HMC221A 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 101675-HMC221A reliable?
The price and inventory of 101675-HMC221A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 101675-HMC221A is usually 5 days.
3.What payment methods are accepted for 101675-HMC221A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 101675-HMC221A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 101675-HMC221A?
101675-HMC221A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 101675-HMC221A 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 101675-HMC221A?
For technical support, including 101675-HMC221A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 101675-HMC221A requirements.
6.How does Aetrix verify that 101675-HMC221A is sourced from the original manufacturer or authorized distributors?
All 101675-HMC221A 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 101675-HMC221A meets industry standards.
7.What is the process for return or replacement of 101675-HMC221A?
All 101675-HMC221A units undergo pre-shipment inspection (PSI). If there is an issue with 101675-HMC221A, 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 101675-HMC221A part is unused and in its original packaging.
Return procedure for 101675-HMC221A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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