■ Overview
The MN3674 is a high responsivity CCD color linear image sensor with 512 pixels each for R and B and 1024 G pixels, and having low dark output floating photodiodes in the photodetector region and CCD analog shift registers for read out.
It can read a 64mm-width color document with a high quality and a maximum pseudo resolution of 400dpi. In addition to being used as a color sensor, this device can also be used as a black and white sensor if only the G row is used, and in this case, it is possible to read a 64mm-width document with a full resolution of 400dpi. Since a one line delay analog memory is built in so as to compensate for the difference in the positions of reading out between the R, B rows and the G row, the configuration of the signal processing circuit becomes simpler.

■ Features
• 2048 floating photodiodes and n-channel buried type CCD shift
   registers for read out are integrated in a single chip.
• RGB primary colors type on chip color filters are used for color
   separation.
• In order to compensate for the distance between the photodiode
   rows for the R, B colors and the G color, the device has a built in
   analog memory that can store the signals of one line of the R-B
   colors row.
• All clock inputs can be driven by 5V CMOS logic.
• Use of photodiodes with a new structure has made the dark output
   voltage very low.
• Large signal output of typically 0.8V at saturation can be obtained.

■ Application
• Color graphic read out in color image scanners, color fax machines,
   etc.