Check out the datasheet for this single row CCD sensor[1]. Look at pages 2 and 6, which show the block diagram and control signal waveforms. There is a single a

Check out the datasheet for this single row CCD sensor[1]. Look at pages 2 and 6, which show the block diagram and control signal waveforms. There is a single analog output pin. To read the device the "analog shift register" is used, which is a bucket brigade device to move the charge from the photo diode to the output buffer. [1] https://www.spectralproducts.com/pdf/ToshibaTCD1304.pdf https://www.spectralproducts.com/pdf/ToshibaTCD1304.pdf