A very specific request!
Every so often she would pull it out, trace a finger along the timing diagram, and listen as the chip on her bench sang that single, impossible note — a reminder that sometimes a simple link on the corner of a page could open a path to collaboration, creativity, and a little bit of wonder. a68064 datasheet link
Veswin Electronics: Offers detailed technical specs, including equivalents and schematic diagrams. A very specific request
AllDatasheet: Useful for comparing the A68064 against similar sink drivers like the A6801. 8 data registers (D0-D7) 8 address registers (A0-A7)
The Motorola 68064 boasts several key features that made it a popular choice in its time:
| Symptom | Likely Cause | Datasheet Reference | Fix | |---------|--------------|---------------------|-----| | Outputs stay off, FAULT pin low | Overcurrent or thermal shutdown | Section: "Protection Circuits" | Check load impedance; measure if >2A. Allow cooling. | | One channel works, others not | Individual channel OCP trip | Section: "OCP Blanking Time" | Increase blanking time capacitor on VREG (if external). Otherwise, reduce inrush. | | IC heats up quickly | High ( R_DS(on) ) due to insufficient gate drive | Section: "VDD vs RDS(on)" graph | Ensure VDD ≥ 4.5V for minimum resistance. | | Motor steps irregularly | PGND and LGND shared with high current | Section: "Grounding Recommendations" | Separate PGND and LGND, connect only at IC pin 2 and 8. | | FAULT triggers at startup only | Inrush current exceeding OCP threshold | Section: "OCP Response Time" | Add soft-start via PWM of ENABLE pin or add series inductor. |