This paper describes the design and performance of a very high speed, low power multi-channel hybrid overcurrent controller chip implemented using gallium arsenide (GaAs) technology. The mixed analog-digital integrated circuit uses source coupled MESFET logic for analog components and GaAs merged logic for digital components. The design of a multi-bit data acquisition circuit is based on a flash analog-to-digital converter requiring only 2 (n-1) comparators as compared to (2 n-1) comparators for a standard n-bit flash converter. The design is module oriented, thus enabling easy paralleling into multi-bit circuit. A cellular design methodology was used to give the design flexibility, which allows it to be easily cascaded into multi-bit chip. The chip was implemented with 797 GaAs devices and dissipated 236.33 milliwatts of power. The results indicate large logic swings resulting in excellent noise margins and a very high-speed operation enabling reliable multi-function operation of this chip.