1. Products
  2. RF and Microwave
  3. Attenuators
  4. Digital Step Attenuators
  5. HMC424ALP3E


Features and Benefits

  • Attenuation range: 0.5 dB (LSB) steps to 31.5 dB
    • ±0.5 dB typical step error
  • Low insertion loss: 2.8 dB at 4 GHz
  • High linearity at VEE = −3 V
    • Input P0.1dB: 22 dBm typical
    • Input IP3: 45 dBm typical
  • High RF input power handling: 25 dBm maximum
  • Low relative phase: 30° typical at 6.0 GHz
  • Single-supply operation: −3 V to −5 V
  • 16-lead, 3 mm × 3 mm LFCSP package

Product Details

The HMC424ALP3E is a broadband, 6-bit, gallium arsenide (GaAs), digital attenuator in low cost, leadless surface-mount package with a 31.5 dB attenuation control range in 0.5 dB steps.

The HMC424ALP3E offers excellent attenuation accuracy of ±(0.2 dB + 4% of attenuation state) and high input linearity with a typical insertion loss of less than 4 dB over the specified frequency range from 0.1 GHz to 13.0 GHz. The attenuator bit values are 0.5 dB (LSB), 1 dB, 2 dB, 4 dB, 8 dB, and 16 dB for a total attenuation of 31.5 dB with a ±0.5 dB typical step error.

The device allows a user to program the attenuation state via six parallel control inputs toggled between 0 V and VEE.

The HMC424ALP3E operates with a single negative supply voltage from −3 V to −5 V, and requires an external level shifter to interface with a CMOS/transistor to transistor logic (TTL) interface.

The HMC424ALP3E comes in a RoHS compliant, compact, 3 mm × 3 mm, 16-lead lead frame chip scale package (LFCSP).


  • Cellular infrastructure
  • Microwave radios and very small aperture terminals (VSATs)
  • Test equipment and sensors
  • Intermediate frequency (IF) and RF designs
  • Military and space

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

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Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
HMC424ALP3E Material Declaration Reliability Data 16-Lead LFCSP (3mm x 3mm x 0.85mm)
HMC424ALP3ETR Material Declaration Reliability Data 16-Lead LFCSP (3mm x 3mm x 0.85mm)
Wafer Fabrication Data

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.