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CDC421A106
  • CDC421A106

CDC421A106

ACTIVE

106.25-MHz fully integrated fixed frequency low-jitter crystal oscillator clock generator

Texas Instruments CDC421A106 Product Info

1 April 2026 5

Parameters

Number of outputs

1

Output type

LVPECL

Output frequency (max) (MHz)

106.25

Core supply voltage (V)

3.3

Output supply voltage (V)

3.3

Input type

LVCMOS

Operating temperature range (°C)

-40 to 85

Features

Chip-enable control pin, Signal 3.3-V supply

Rating

Catalog

Package

VQFN (RGE)-24-16 mm² 4 x 4

Features

  • Single 3.3-V Supply
  • High-Performance Clock Generator, Incorporating Crystal Oscillator Circuitry with Integrated Frequency Synthesizer
  • Low Output Jitter: As low as 380 fs (RMS integrated between 10 kHz to 20 MHz)
  • Low Phase Noise at 312.5 MHz:
    • Less than -120 dBc/Hz at 10 kHz and -147 dBc/Hz at 10-MHz offset from carrier
  • Supports Crystal or LVCMOS Input Frequencies at 31.25 MHz, 33.33 MHz, and 35.42 MHz
  • Output Frequencies: 100 MHz, 106.25 MHz, 125 MHz, 156.25 MHz, 212.5 MHz, 250 MHz, and 312.5 MHz
  • Differential Low-Voltage Positive Emitter Coupled Logic (LVPECL) Outputs
  • Fully-Integrated Voltage-Controlled Oscillator (VCO): Runs from 1.75 GHz to 2.35 GHz
  • Typical Power Consumption: 300 mW
  • Chip Enable Control Pin
  • Available in 4-mm × 4-mm QFN-24 Package
  • ESD Protection Exceeds 2 kV (HBM)
  • Industrial Temperature Range: -40°C to +85°C
  • APPLICATIONS
    • Low-Cost, Low-Jitter Frequency Multiplier

All trademarks are the property of their respective owners.

  • Single 3.3-V Supply
  • High-Performance Clock Generator, Incorporating Crystal Oscillator Circuitry with Integrated Frequency Synthesizer
  • Low Output Jitter: As low as 380 fs (RMS integrated between 10 kHz to 20 MHz)
  • Low Phase Noise at 312.5 MHz:
    • Less than -120 dBc/Hz at 10 kHz and -147 dBc/Hz at 10-MHz offset from carrier
  • Supports Crystal or LVCMOS Input Frequencies at 31.25 MHz, 33.33 MHz, and 35.42 MHz
  • Output Frequencies: 100 MHz, 106.25 MHz, 125 MHz, 156.25 MHz, 212.5 MHz, 250 MHz, and 312.5 MHz
  • Differential Low-Voltage Positive Emitter Coupled Logic (LVPECL) Outputs
  • Fully-Integrated Voltage-Controlled Oscillator (VCO): Runs from 1.75 GHz to 2.35 GHz
  • Typical Power Consumption: 300 mW
  • Chip Enable Control Pin
  • Available in 4-mm × 4-mm QFN-24 Package
  • ESD Protection Exceeds 2 kV (HBM)
  • Industrial Temperature Range: -40°C to +85°C
  • APPLICATIONS
    • Low-Cost, Low-Jitter Frequency Multiplier

All trademarks are the property of their respective owners.

Description

The CDC421Axxx is a high-performance, low-phase-noise clock generator. It has an integrated low-noise, LC-based voltage-controlled oscillator (VCO) that operates within the 1.75 GHz to 2.35 GHz frequency range. It has an integrated crystal oscillator that operates in conjunction with an external AT-cut crystal to produce a stable frequency reference for a phase-locked loop (PLL)-based frequency synthesizer. The output frequency (fOUT) is proportional to the frequency of the input crystal (fXTAL).

The device operates in 3.3-V supply environment and is characterized for operation from -40°C to +85°C. The CDC421Axxx is available in a QFN-24 4-mm × 4-mm package.

The CDC421Axxx differs from the CDC421xxx in the following ways:

  • Device Startup

    • The CDC421Axxx has an improved startup circuit to enable correct operation for all power-supply ramp times.

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