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  2. Clock and Timing
  3. Counters, Timers and Delay Linear
  4. Time Delays
  5. HMC856


Features and Benefits

  • Differential and single-ended operation
  • Low power consumption: 610 mW typical
  • Programmable differential
    • Output voltage swing: 500 mVp-p to 1350 mVp-p
  • Fast rise/fall time: 20 ps/18 ps
  • Supports data rates up to 28 Gbps
  • Single supply: −3.3 V
  • 5 mm × 5 mm, 32-terminal ceramic leadless chip carrier (LCC) package: 25 mm2

Product Details

The HMC856 is a wideband time delay device with a 5-bit digital control designed for timing compensation or clock skew management applications. The time delay provides nearly 100 ps (maximum) of delay range with 3 ps resolution and supports 28 Gbps data. The monotonic delay is compensated for stable operation over both power supply and temperature variation.

All differential inputs to the HMC856 are current mode logic (CML) and terminated on chip with 50 Ω to the positive supply ground, GND, and can be ac or dc-coupled. The differential CML outputs are source terminated to 50 Ω and can also be ac or dccoupled. Connect outputs directly to a 50 Ω ground terminated system or drive devices with CML logic input. The control lines, B4 to B0, are differential CML inputs terminated with 600 Ω to the positive rail, which supports lower power control options. The HMC856 features an output level control pin, VR, that allows loss compensation or signal level optimization. The HMC856 operates from a single −3.3 V supply and is available in a 5 mm × 5 mm LCC package.


  • SONET OC-192
  • High speed serial logic
  • Clock and data recovery
  • Broadband test and measurement equipment
  • Frequency synthesis
  • Matched timing

Product Categories

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

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Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
HMC856LC5 Material Declaration Reliability Data 32-Lead LCC (5mm x 5mm w/ EP)
HMC856LC5TR Material Declaration Reliability Data 32-Lead LCC (5mm x 5mm w/ EP)
HMC856LC5TR-R5 Material Declaration Reliability Data 32-Lead LCC (5mm x 5mm w/ EP)
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.