68B21 PIA / 6821 (MC68B21P)

68B21 Peripheral Interface Adapter. This is the faster B version that can be used as a 6821 or 68B21 and is a better chip overall. Suggested replacement for earlier 6820 PIA. Used in all Williams, Bally, Stern and other early solid state pinball machines as well as in video games. Used in positions U10 & U11 on Bally/Stern pinball machine and shuffle alley MPU boards. Reference: 6821 6820 68B21 HD63B21P HD6321FP EF68B21P HD68B21P MC68B21P Bally E-620-29 Williams 5A-8972 Williams 5430-08972-00 Data East / Sega / Stern 100-0255-00 Motorola - MC6821P ST Microelectronics - EF68B21P Hitachi - HD468B21P Fairchild Semiconductor - 68B21P Taito 15-00004-001