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? TYPES SN74LS390, SN74393, SN74LS393 SN54LS390, SN54393, SN54LS393 DUAL 4-BIT DECADE AND BINARY COUNTERS
OCTOBER 1976 REVISED DECEMBER 1983
D ual Versions o f th e Popular '9 0 A , 'L S 9 0 a n