Found Integrated Circuits
A small compendium of old silicon chips
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1971
National Semiconductor DM74192N Synchronous Up/Down Counters with Dual Clock
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Texas Instruments SN7490N Asynchronous Decade Counters
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Mullard FJH131(A) TTL Quadruple 2-Input NAND Gates
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Mullard FJJ121A TTL Dual Master-Slave JK Flip-Flops
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Texas Instruments SN74107N Dual J-K Flip-Flops With Clear
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