BUY B57656 https://www.utsource.net/itm/p/1089873.html

The B57656 is a 68-pin plastic leaded chip carrier (PLCC) from Siemens. It is a surface mount device with a square body and a flat bottom. It has a 0.8mm lead pitch and is designed for use in high-density applications. The B57656 is a low-power, low-cost, low-voltage, high-speed CMOS logic device. It is designed to provide logic functions such as AND, OR, NAND, NOR, XOR, and XNOR. It is suitable for use in a variety of applications including logic circuits, memory circuits, and interface circuits. It is also suitable for use in automotive, industrial, and consumer applications. (For reference only)