15 2 A2 8 14 1 9 10 11 12 13 B5 GND 4 NC NC A VCC 9 NC A1 5 GND 4 NC NC A0 VCC 0 E0 NC − No internal connection TYPE ’147 ’148 ’LS147 ’LS148 TYPICAL DATA DELAY 10 ns 10 ns 15 ns 15 ns TYPICAL.