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Fujitsu Microelectronics America Introduces New Spread Spectrum Clock Generators

Strategic Insights

— 1 min read

Fujitsu Microelectronics America, Inc. has introduced a new series of spread spectrum clock generators (SSCGs) that reduce Electro Magnetic Interference (EMI) in high-frequency electronic devices. The MB88150 series includes various SSCGs that modulate clock frequencies to minimize peak emissions in products such as computers, printers, MP3 players, cell phones, and other devices operating at increasingly higher frequencies.

The new SSCGs can be used independently or in conjunction with shields, capacitors, and chip coils to reduce EMI observed at both main clock frequencies and harmonic spurious frequencies. According to Fujitsu, the SSCGs exhibit excellent noise reduction, making them a cost-effective and space-efficient solution for EMI noise management in high-frequency devices.

Key Takeaways:

  • The MB88150 series includes four different SSCGs: MB88151, MB88152, MB88153, and MB88154, each with unique features and capabilities.
  • The SSCGs modulate clock frequencies to attenuate peak emissions and reduce EMI noise in high-frequency devices.
  • The MB88151 has a built-in frequency multiplier and provides an output frequency of 8.3 MHz up to 133.4 MHz.
  • The MB88152 and MB88153 feature a power-down pin and external clock input, providing input and output frequencies of 20 MHz to 134 MHz.
  • The MB88154 provides a reference clock output and input and output frequencies of 20 MHz to 67 MHz.
  • The SSCGs use digital PLL circuit technology to control clock frequency modulation with high precision, enabling a record 19dB reduction in EMI noise.
  • The new SSCGs eliminate the need for additional EMI noise-reduction components used in conventional clock generators.
  • Pricing for the SSCGs starts at $1.29 each in 1,000-unit quantities for the 8-pin small outline (SO) package.

Statistics:

  • The MB88150 series includes four different SSCGs.
  • The SSCGs can operate at frequencies up to 133.4 MHz (MB88151) and 134 MHz (MB88152 and MB88153).
  • The SSCGs provide a 19dB reduction in EMI noise.
  • The SSCGs require a power supply voltage of 3.3V.
  • The SSCGs have a supply current of 5mA at 24 MHz.
  • Pricing starts at $1.29 each in 1,000-unit quantities.

Sources:

  • Fujitsu Microelectronics America, Inc. press release, March 8.
  • http://www.fma.fujitsu.com/sscg
  • "FMA's new SSCGs reduce EMI noise in high-frequency devices," Emi Igarashi, Fujitsu Microelectronics America, Inc., +1-408-737-5647, or eigarash@fma.fujitsu.com.

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