Descripción
HP 1MM4-0001 Custom Printhead Controller and System ASIC
The HP 1MM4-0001 is a custom HP application-specific integrated circuit. Its markings are 1MM4-0001 9526307 9536 SINGAPORE. In the HP DeskJet 850C/855C printer logic system, this type of custom ASIC is associated with central printer control functions, including carriage timing, printhead pulse control and host-interface coordination.
Identification
- Manufacturer: HP
- Part number / top marking: 1MM4-0001
- Additional marking: 9526307 9536 SINGAPORE
- Package: QFP-100 surface-mount
- Era: 1995
Application
Custom printer controller ASIC for legacy printer electronics. As a specialised IC, replacement suitability depends on the exact printer board and circuit revision. Confirm the complete marking and package before ordering.

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