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TYPES SN54190, SN54191, SN54LS190, SN54LS191, SN74190, SN74191, SN74LS190, SN74LS191 SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL
DECEMBER 1 9 7 2 - R E V IS E D D E C E M B E R 1983
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