Found Integrated Circuits
A small compendium of old silicon chips
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BCD
National Semiconductor DM74192N Synchronous Up/Down Counters with Dual Clock
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Texas Instruments SN7442NV 4-Line BCD to 10-Line Decimal Decoders
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National Semiconductor DM74LS47N BCD-to-7-Segment Decoders/Driver
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National Semiconductor DM8842N (SN7442N) 4-Line BCD to 10-Line Decimal Decoders
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