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TYPES SN54490, SN54LS490, SN74490, SN74LS490 DUAL 4-BIT DECADE COUNTERS
O CTO BER 1 9 7 6 --R E V IS E D D ECEM BER 1983
Dual Versions of Popular SN 5490A, SN 54LS90, SN 7490A, and SN 74LS90 Count