name: 402038 function: serial multiplexer (4player adapter) package: 28 pin DIP,28 manufacturer: motorola added-by: rob comment: (?) maybe isolated ports +--()--+ vcc sense (?) | 1 28| VCC vcc (?) | 2 27| clk_out 3mHz p4s_in | 3 26| clk2_in 3mHz p3s_in | 4 25| vcc (?) p2s_in | 5 24| n.c. (?) p1s_out (master) | 6 23| vcc (?) p4s_out | 7 22| p3s_clk p3s_out | 8 21| p4s_clk p2s_out | 9 20| p2s_clk p1s_in (master) |10 19| p1s_clk (master) gnd (?) |11 18| vcc (?) gnd (?) |12 17| vcc (?) gnd (?) |13 16| vcc (?) GND |14 15| vcc (?) +------+ This information was added by a third party and may be incorrect. This pinout came from the Chipdir: http://www.chipdir.org/