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Multichannel clock distribution circuit

The STCD22x0, STCD23x0 and STCD24x0 are 2, 3 or 4 output clock distribution circuits which accept external square wave or sine wave signals and output rail-to-rail (0 V to VTCXO) square wave signals. They are used to provide a common frequency clock to multimode mobile RF applications. They can also be used for those baseband peripheral applications in mobile phones such as WLAN, Bluetooth, GPS and DVB-H as the clock reference. The STCD22x0, STCD23x0 and STCD24x0 isolate each device driven by their clock outputs and minimize interference between the devices. Each of the clock buffers can be disabled to lower the power consumption whenever the connected device does not need the clock. The STCD22x0, STCD23x0 and STCD24x0 accept commonly used mobile master clock frequencies ranging from 10 MHz to 52 MHz.

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Errata Sheet
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Key Features

  • 2, 3 or 4 output buffered clock distribution
  • Single-ended square wave (or sine wave) clock input
  • Rail-to-rail (0 V to VTCXO) square wave output
  • Individual enable pin for each output
  • 1.8 V, high PSRR LDO for external clock source voltage supply (VTCXO)
  • No AC coupling capacitor needed
  • Ultra-low phase noise and standby current
  • Common system clock request, open drain, active low
  • Clock enable signal polarities factory programmable (STCD23x0)
  • Option pins allow clock enable polarities to be user configurable (STCD22x0 and STCD24x0)
  • High isolation output-to-output & output-to-input
  • 2.5 V to 5.1 V battery supply voltage
  • 40 pF max load driving capability per output
  • Available in chip scale package (CSP)
  • Operating temperature : –20 °C to 85 °C

Circuit Diagram

Design Resources


Technical Documentation

Product Specifications

Description Version Size
DS6104: Multichannel clock distribution circuit
2.0 1,942 KB

HW Model & CAD Libraries

HW Model & CAD Libraries

Description Version Size
STCD2400 IBIS model
1.0.0 24 KB

Sample & Buy

Part Number Marketing StatusPackagePacking TypeAutomotive GradeOrder From STUnit Price (US$)*
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STCD2400F35FNRNDChip Scale Package 0.4mm pitchTape And Reel_-No availability reported, please contact our Sales officeEcopack2-

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
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