other parts : 74HC646
GENERAL DESCRIPTIONThe 74HC/HCT646 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A.
FEATURES• Independent register for A and B buses• Multiplexed real-time and stored data• Output capability: bus driver• ICC category: MSI