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Signetics 8051Siemens microprocessors
AMD Fujitsu
Intel P8051AH OKI M80C51-57
Siemens Signetics SCN8051H CCN40 / SCN8051HCCN40
USSR KR1816VE51

Signetics 8051Siemens microprocessors
Siemens SAB8051A-10-P-T40/110 Siemens SAB8051A-12-P-T40/85
Siemens SAB8051A-16-N Siemens SAB8051A-16-P
Siemens SAB8051A-N Siemens SAB8051A-P
Siemens SAB80C51-P

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