3 units: Texas Instruments, SN74LS193N - Synchronous 4-Bit Counter (PDIP)

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TEXAS INSTRUMENTS SEMI SN74LS193N / SN74LS193N (NEW NO BOX)

Texas Instruments SN74LS193N Counter Single 4-Bit Binary UP/Down 16-Pin

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74LS170N Texas Instruments INTEGRATED CIRCUIT

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