| Produttore elettronici | Il numero della parte | Scheda tecnica | Spiegazioni elettronici |
National Semiconductor ... | MM54C90 | 
124Kb/6P | 4-Bit Decade, Binary Counter |
| MM54C901 |
136Kb/6P | Hex Inverting TTL, Non-Inverting TTL, Inverting CMOS, Non-Inverting CMOS Buffer |
| MM54C902 |
136Kb/6P | Hex Inverting TTL, Non-Inverting TTL, Inverting CMOS, Non-Inverting CMOS Buffer |
| MM54C903 |
136Kb/6P | Hex Inverting TTL, Non-Inverting TTL, Inverting CMOS, Non-Inverting CMOS Buffer |
| MM54C904 |
136Kb/6P | Hex Inverting TTL, Non-Inverting TTL, Inverting CMOS, Non-Inverting CMOS Buffer |
| MM54C906 |
106Kb/4P | Hex Open Drain N, P-Channel Buffers |
| MM54C907 |
106Kb/4P | Hex Open Drain N, P-Channel Buffers |
| MM54C909 |
322Kb/5P | QUAD COMPARATOR |
| MM54C909J |
322Kb/5P | QUAD COMPARATOR |
| MM54C909N |
322Kb/5P | QUAD COMPARATOR |
| MM54C90J |
124Kb/6P | 4-Bit Decade, Binary Counter |
| MM54C90N |
124Kb/6P | 4-Bit Decade, Binary Counter |
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