Identified Chips in the Series 4 ECU




The following is all the information that I have been able to find about many of the IC's used in the ECU.


Hitachi HD6303 Processor

HD46508A Analog Data Acquisition Unit in PDF

40HC373 Octal tristate latch data sheet (Actually 74HC373, which is similar)

TC5517 2Kx8 SRAM

2764 8Kx8 EPROM

HD46821P, Hitachi version of Motorola MC6821 PIA

HD6840P, Hitachi version of Motorola MC6840 Timer

TC4013B, Toshiba version of the 4013B dual D flip-flop

74HC138 3 to 8 demux data sheet in PDF

74HC00 quad NAND gate data sheet in PDF

TC40H010P Triple 3-input NAND gate

TD62504P Open collector NPN transistor array data sheet in PDF