CALIFORNIA WARNING: This product can expose you to chemicals, including lead and DEHP, which are known to the State of California to cause cancer and birth defects, or other reproductive harm. For more information, go to https://www.p65warnings.ca.gov.
28 pin DIP 1 Mhz. Programmable TImer Module integrated circuit.
Reference:
68A40
6840
HD6340
HD6840
MC68A40P
Stern SB-300 sound card component