Mitsubishi IC date codes.

From: Nigel Tout
Email: nigeltout@madasafish.com


Does anyone know how to decypher the date codes on Mitsubishi integrated circuits. For example, a Teal TL-2M (late 1960s - early 1970s) has ICs (date codes in brackets) MA8149(8075), MA8150 (8070), MA8151 (8161), MA8152 (8130), MA8153 (8107), and MA8154 (8062). And a Sanyo CX-2103 has ICs MA8603 (0631), MA8604-05 (9061), MA8605B (1232), and M58602-81 (0426). Any suggestions will be very welcome. Nigel