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The CD40147B CMOS encoder features priorityencoding of the inputs to ensure that only thehighest-order data line is encoded. Ten datainput lines (0-9) are encoded to four-line(8, 4, 2, 1) BCD. The highest priority line is line 9.All four output lines are logic 1 (VSS) when allinput lines are logic 0. All inputs and outputs arebuffered, and each output can drive one TTLlow-power Schottky load. The CD40147B isfunctionally similar to the TTL54/74147 if pin 15is tied low.The CD40147B types are supplied in 16-leaddual-in-line plastic packages (E suffix), 16-leadsmall-outline packages (M, M96, MT, and NSRsuffixes), and 16-lead thin shrink small-outlinepackages (PW and PWR suffixes).

Electrical characteristics :