74LS Datasheet(PDF) - National Semiconductor (TI)
74LS 191-up/down Binary Counter - HTE Babgladesh
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SN74LS191N | Texas Instruments Zähler 4-Bit Zähler LS Down Counter, Up Counter THT Binär 16-Pin PDIP 1 | RS
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74LS datasheet - Synchronous 4-bit Up/down Counter
74ls Series Logic IC, Sn74ls163n DIP-16 4-Bit Binary Counter, Circuit Board, Industrial Equipment - China Integrated Circuit, Electronic Components | Made-in-China.com
low power - Looking for a 74LS "friendly" decimal counter or BCD to decimal decoder (similar to CD4017) - Electrical Engineering Stack Exchange
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Ring Counter or Johnson Counter Circuit with 74LS164
74ls Series Logic IC, Sn74ls90n DIP-14 Decimal Counter with Two/Five Division, Decade Counter, Diode - China Electronic Components, IC | Made-in-China.com
Counter and ROM
74LS Datasheets
SN74LS163AN TEXAS INSTRUMENTS - IC: digital | 4bit,counter,presettable,synchronous; 74LS; THT; 74LS163 | TME - Electronic components (WFS)
SN74LS590N - Texas Instruments - IC, 74LS, BINARY COUNTER
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74LS Datasheet(PDF) - ON Semiconductor
50/30/100-MHz Preset Binary Counter PDIP-14 Type SN74LS197N, Grieder Elektronik Bauteile AG
sump.org: Frequency Counter and Timer
