© 2000 Scenix Semiconductor, Inc. All rights reserved. - 43 - www.scenix.com SX18AC/SX20AC/SX28AC/SX18AC75/SX20AC75/SX28AC75 17.5    AC Characteristics SX18/20/28AC75 (Temp Range: 0°C <= Ta <= +70°C) Note:Data in the Typical (“TYP”) column is at 5V, 25°C unless otherwise stated. 17.6    Comparator DC and AC Specifications Symbol Parameter Min Typ Max Units Conditions Fosc External CLKIN Frequency DC 75 MHz HS1/HS2/HS3 Oscillator Frequency DC - 75 MHz HS1/HS2/HS3 Tosc External CLKIN Period 13.3 - - ns HS1/HS2/HS3 Oscillator Period 13.3 - - ns HS1/HS2/HS3 TosL, TosH Clock in (OSC1) Low or High Time 8.0 - - ns HS1/HS2/HS3 TosR, TosF Clock in (OSC1) Rise or Fall Time - - 25 ns HS1/HS2/HS3 Parameter Conditions Min Typ Max Units Input Offset Voltage 0.4V < Vin < Vdd – 1.5V +/- 10 +/- 25 mV Input Common Mode Voltage Range 0.4 Vcc – 1.3 V Voltage Gain 300k V/V DC Supply Current (enabled) Vdd = 5.5V 120 µA Response Time Voverdrive = 25mV 250 ns