© 2000 Scenix Semiconductor, Inc. All rights reserved. - 46 - www.scenix.com SX18AC/SX20AC/SX28AC/SX18AC75/SX20AC75/SX28AC75 17.7     Typical Performance Characteristics (continued) 600 500 400 300 200 100 _ _ _ _ _ _ 2 2.5 3 3.5 4 Vdd (V) 4.5 5 Active Supply Current Vs Vdd (32 kHz External Clock) 5.5 Port A/B/C Weak Pull-Up Source Current Voh (V) 160 120 80 40 _ _ _ _ 1 2 3 4 5 6 Port A/B/C Source Current Voh (V) 40 30 20 10 _ _ _ _ 1 2 3 4 5 6 Vol (V) 40 30 20 10 _ _ _ _ 0.5 1.0 Port A/B/C Sink Current