CDC3RL02 Dual-Channel Square/Sine-to-Square Wave Clock Buffer |

CDC3RL02 (ACTIVE) Dual-Channel Square/Sine-to-Square Wave Clock Buffer



The CDC3RL02 is a two-channel clock fan-out buffer and is ideal for use in portable end-equipment, such as mobile phones, that require clock buffering with minimal additive phase noise and fan-out capabilities. It buffers a single master clock, such as a temperature compensated crystal oscillator (TCXO) to multiple peripherals. The device has two clock request inputs (CLK_REQ1 and CLK_REQ2), each of which enable a single clock output.

The CDC3RL02 accepts square or sine waves at the master clock input (MCLK_IN), eliminating the need for an AC coupling capacitor. The smallest acceptable sine wave is a 0.3-V signal (peak-to-peak). CDC3RL02 has been designed to offer minimal channel-to-channel skew, additive output jitter, and additive phase noise. The adaptive clock output buffers offer controlled slew-rate over a wide capacitive loading range which minimizes EMI emissions, maintains signal integrity, and minimizes ringing caused by signal reflections on the clock distribution lines.

The CDC3RL02 has an integrated Low-Drop-Out (LDO) voltage regulator which accepts input voltages from 2.3 V to 5.5 V and outputs 1.8 V, 50 mA. This 1.8-V supply is externally available to provide regulated power to peripheral devices such as a TCXO.

The CDC3RL02 is offered in a 0.4-mm pitch wafer-level chip-scale (WCSP) package (0.8 mm × 1.6 mm) and is optimized for very low standby current consumption.


  • Low Additive Noise:
    • –149 dBc/Hz at 10-kHz Offset Phase Noise
    • 0.37 ps (RMS) Output Jitter
  • Limited Output Slew Rate for EMI Reduction
    (1- to 5-ns Rise/Fall Time for 10-pF to 50-pF Loads)
  • Adaptive Output Stage Controls Reflection
  • Regulated 1.8-V Externally Available I/O Supply
  • Ultra-Small 8-bump YFP 0.4-mm Pitch WCSP
    (0.8 mm × 1.6 mm)
  • ESD Performance Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 1000-V Charged-Device Model
      (JESD22-C101-A Level III)

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Part number Order Additive RMS jitter (Typ) (fs) Output frequency (Max) (MHz) Input type Number of outputs Output type VCC out (V) Operating temperature range (C) Rating
CDC3RL02 Order now 370     52     SINE / SQUARE     2     SQUARE     1.8     -40 to 85     Catalog    
CDC3S04 Samples not available 300     52     SINE     4     SINE     1.8     -40 to 85     Catalog