ed, Pin 6 may be left open to conserve dc power drain. 16 1 P SUFFIX PLASTIC PACKAGE CASE 648 PIN CONNECTIONS VCCO Q 1 2 3 4 5 6 7 8 (Top View) 16 VCC 15 Clock 14 VBB 13 E1 MECL 12 E2 MECL 11 E3 ME.