View mc74hc147 datasheet:

MOTOROLA SEMICONDUCTOR TECHNICAL DATA MC74HC147 Decimal-to-BCD Encoder High–Performance Silicon–Gate CMOS The MC74HC147 is identical in pinout to the LS147. The device inputs are N SUFFIX compatible with standard CMOS outputs; with pullup resistors, they are PLASTIC PACKAGE 16 compatible with LSTTL outputs. CASE 648–08 This device encodes nine active–low data inputs to four active–low BCD 1 Address Outputs, ensuring that only the highest order active data line is encoded. The implied decimal zero condition is encoded when all nine data D SUFFIX inputs are at a high level (inactive). 16 SOIC PACKAGE • Output Drive Capability: 10 LSTTL Loads CASE 751B–05 1 • Outputs Directly Interface to CMOS, NMOS, and TTL • Operating Voltage Range: 2 to 6 V ORDERING INFORMATION • Lo