© 1999 Scenix Semiconductor, Inc. All rights reserved. - 39 - www.scenix.com SX18AC  / SX20AC / SX28AC 17.5 Typical Performance Characteristics Active Supply Current (External Clock) Operating Frequency (MHz) 70 60 50 40 30 20 10 _ _ _ _ _ _ _ 10 20 30 40 50 Port A/B/C Weak Pull-Up Source Current Voh (V) 400 300 200 100 _ _ _ _ 1 2 3 4 5 6 OSC2, 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 OSC2, Port A/B/C Sink Current Note: The lower voltage version of the device will be available for sampling in 99Q2 (minimum operation voltage of (2.5V). This version will also have lower supply current (both active and power down modes). The target spec
for active mode supply current is 50 mA at Vdd = 5.0V, and for power down mode it is expected to be less than
1 uA (typical).