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Products > ASIC > Cell-Based IC > IP Core > Analog Core > PLL/VCO/SSCG Core >

SSCG topics

High-precision analog circuit technology: Development of core SSCGs for generating CB-90 clocks


A spread-spectrum clock generator (SSCG) core for generating clocks, is an on-chip core which generates clocks for reducing the level of electromagnetic interference (EMI) of LSI chips, and they have recently been drawing increasing attention.

Since we developed our original on-chip core*1 0.35 µm generation clock-generating core SSCG in 1998 — the world's first — NEC Electronics has contributed to improving the EMI characteristics of various types of electrical goods such as OA equipment and home appliances, amassing a wealth of technical know-how at the same time.

In addition to on-chip clock-generating core SSCGs reducing the number of components to be mounted onto a circuit board, since clock lines are enclosed in a chip, excellent EMI characteristics can be attained, and power consumption reduced.

We have used our accumulated technology to develop the cell-based IC CB-90 (90 nm generation), an on-chip clock-generating core SSCG which can support up to 400 MHz.

This clock-generating core SSCG (CB-90) has the following features.


  1. Basic performance (both high-speed operation and low power consumption)
    VCO frequency range: 200 to 400 MHz, maximum current consumption: 7.8 mA (CB-90M type)
  2. Easy-to-use on-chip core
    • Programmable settings (multiplication rate, variable frequencies, modulation degree)
    • Large modulation degree can be achieved (EMI characteristics can be greatly improved)
    • Royalty-free self-manufactured core
    • Low power consumption
    • No need for clock line wiring outside of the chip
  3. Proven track record of use
    After its release in January 2006, the CB-90 SSCG has been adopted by several corporate users, with mass production subsequently beginning two months later.

Contact an NEC Electronics sales representative for details.


Note(*)

  1. Custom LSI-specific core