4096-stage bucket brigade delay (BBD) with maximum delay time of 204.8ms. Direct replacement for the Panasonic MN3205. Used in many delay effects such as the BOSS® DM-2 (second version) and DM-3. The V3102D is a companion clock generator that is also found in many 3205-based circuits.
Note: The V3205D fits a standard DIP-14 footprint, but it omits the middle 3 pins on each side, so there are only 8 pins in total. Presumably the “SD” suffix stands for “special DIP” since the “D” normally refers to a standard DIP package.