Multiple Vcc pins???

Discussion in 'General Electronics Chat' started by rrrchandu, Aug 17, 2014.

  1. rrrchandu

    Thread Starter New Member

    Aug 9, 2010
    What are the reasons to put multiple Vcc and multiple ground pins on a digital IC. Will there be the same for analog ICs also???

    Thanks in advance.
  2. paulktreg

    Distinguished Member

    Jun 2, 2008
    For clean power distribution.

    My i7 920 processor for example has approx 200 Vcc and 200 ground pins to distribute the power throughout the core. When you consider that modern processors need several tens of amps it's understandable.
    rrrchandu likes this.
  3. crutschow


    Mar 14, 2008
    Analog IC's typically don't require that much current so you seldom see multiple power or ground pins with them. The exceptions are certain analog chips that also have a digital or high power output, such as A/D converters. They may have pins for both analog and digital power and ground to help separate the noisy digital power from the (hopefully) quieter analog power.
    rrrchandu likes this.