Matsushita / Panasonic MN3204 tapped BBD IC NOS condition year 1987 DIP8 case.
The MN3204 is a 512-stage low voltage operation (VDD=5V) low noise BBD that provides a signal delay up to 25.6ms and it is suitable for use a reverberation effect of low voltage operation audio equipment such as portable devices like cassete, guitar pedal effects and others.