HMC939LP4E Analog Devices Integrated Circuit (Quad Flat No-Lead) In Stock
HMC939LP4E is a 6-bit digital attenuator by Analog Devices with 31 dB attenuation range and operation up to 33 GHz. Key specs: 50 Ω characteristic impedance, 7.5 dB maximum insertion loss, and 25 dBm CW input power handling. In stock with worldwide shipping.
- Manufacturer
- Analog Devices
- Package
- Quad Flat No-Lead
- Pin Count
- 24
- Lifecycle
- OBSOLETE
- Datasheet
- HMC939LP4E Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of HMC939LP4E?
- 31 dB attenuation range in 6-bit steps covering DC to 33 GHz in a 24-lead QFN package for wideband RF systems
- 50 Ω characteristic impedance with maximum 7.5 dB insertion loss maintains signal integrity across microwave frequency bands
- Handles up to 25 dBm CW input power, enabling use in high-power RF transmit paths without external attenuation pads
What is HMC939LP4E used for?
The HMC939LP4E is designed for wideband RF and microwave systems including 5G mmWave base stations, phased-array radar, and test-and-measurement instruments where programmable gain control from DC to 33 GHz is required. Its 31 dB digital attenuation range and 50 Ω impedance make it suitable for automatic level control (ALC) loops and calibration circuits in satellite communication ground equipment. The compact 24-lead QFN package supports high-density RF module integration in defense and commercial wireless front-end designs.
What are the specifications of HMC939LP4E?
| Pbfree Code | No |
| Manufacturer Package Code | HCP-24-2 |
| YTEOL | 0 |
| Attenuation-Nom | 31dB |
| Characteristic Impedance | 50Ω |
| Construction | COMPONENT |
| Input Power-Max (CW) | 25.05dBm |
| Insertion Loss-Max | 7.5dB |
| JESD-609 Code | e3 |
| Operating Frequency-Max | 33000MHz |
| Operating Frequency-Min | 100MHz |
| RF/Microwave Device Type | VARIABLE ATTENUATOR |
| Terminal Finish | Matte Tin (Sn) - with Nickel (Ni) barrier |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
Where can I find the HMC939LP4E datasheet?
HMC939LP4E Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for HMC939LP4E?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the frequency range and attenuation capability of the HMC939LP4E for wideband radar designs?
The HMC939LP4E operates from DC to 33 GHz with a 31 dB attenuation range in 6-bit digitally controlled steps of approximately 0.5 dB each. This broad frequency coverage and fine-step resolution make it well-suited for wideband radar systems and electronic warfare applications requiring precise signal level control across multiple GHz bands.
How does the HMC939LP4E handle high input power levels in a 5G mmWave transmit chain?
The HMC939LP4E supports up to 25 dBm CW input power with a 50 Ω characteristic impedance, which accommodates typical 5G mmWave transmit signal levels without saturating the attenuator. This power handling capability allows the device to be placed early in a transmit chain for automatic gain control, reducing the need for additional power handling circuits at 28 GHz or 39 GHz bands.
What is the insertion loss of the HMC939LP4E at minimum attenuation and why does it matter for system noise figure?
The HMC939LP4E has a maximum insertion loss of 7.5 dB at minimum attenuation (0 dB setting). In a receiver chain, this loss directly adds to the system noise figure by up to 7.5 dB, so the device is typically placed after a low-noise amplifier (LNA) to avoid degrading receiver sensitivity in microwave and mmWave front-end designs.
Which package does the HMC939LP4E use and how does it integrate into an RF PCB layout?
The HMC939LP4E comes in a 24-lead QFN (Quad Flat No-Lead) package with a compact footprint suitable for RF PCB layouts using microstrip or coplanar waveguide transmission lines at up to 33 GHz. The exposed paddle on the bottom provides a low-inductance ground connection and thermal path, which is essential for maintaining consistent 50 Ω impedance matching and managing heat dissipation in high-frequency RF boards.
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Why Buy from FindMyChip
About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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