Heathkit H9 Manual page 86

lntegrated Circuits (cont'd.)
HEX INVERTER
WITH OPEN-COLLECTOR OUTPUTS
4.BIT BINARY COUNTER
INPU TR0 il) RO( 2)
NC VCC
N C N C
444-10
444-11
444-12
256-BtT
READ-ONLY MEMORIES
T AD D AD C AD B AD A
DO l
DO 8
0 02
D 03 D0 4 D0 5
D 06 D O 7