The TC246CYM is a frame interline transfer CCD image sensor designed for use in single-chip color NTSC TV, computer, and special-purpose applications requiring low noise, high sensitivity, high speed and low smear. The TC246CYM is a new device of the IMPACTRONTM family of very-low noise, high sensitivity, high speed and low smear sensors that multiply charge directly in the charge domain before conversion to voltage. The charge carrier multiplication (CCM) is achieved by using a low-noise single-carrier, impact ionization process that occurs during repeated carrier transfers through high field regions. Applying multiplication pulses to specially designed gates activates the CCM. Multiplication gain is variable by adjusting the amplitude of the multiplication pulses. The device function resembles the function of an image intensifier implemented in solid state.