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DM74AS157 Arkusz danych(PDF) 3 Page - Fairchild Semiconductor |
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DM74AS157 Arkusz danych(HTML) 3 Page - Fairchild Semiconductor |
3 / 7 page 3 www.fairchildsemi.com Absolute Maximum Ratings(Note 1) Note 1: The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation. Recommended Operating Conditions Electrical Characteristics over recommended operating free air temperature range. All typical values are measured at VCC = 5V, TA = 25°C. Note 2: The output conditions have been chosen to produce a current that closely approximates one half of the true short circuit current, IOS. Supply Voltage 7V Input Voltage 7V Operating Free Air Temperature Range 0 °C to +70°C Storage Temperature Range −65°C to +150°C Typical θ JA N Package 75.0 °C/W Symbol Parameter Min Nom Max Units VCC Supply Voltage 4.5 5 5.5 V VIH HIGH Level Input Voltage 2 V VIL LOW Level Input Voltage 0.8 V IOH HIGH Level Output Current −2mA IOL LOW Level Output Current 20 mA TA Free Air Operating Temperature 0 70 °C Symbol Parameter Conditions Min Typ Max Units VIK Input Clamp Voltage VCC = 4.5V, II = −18 mA −1.2 V VOH HIGH Level VCC = 4.5V to 5.5V VCC − 2V Output Voltage IOH = −2 mA VOL LOW Level VCC = 4.5V 0.35 0.5 V Output Voltage IOL = 20 mA II Input Current at Max VCC = 5.5V Select 0.2 mA Input Voltage VIH = 7V All Others 0.1 IIH HIGH Level VCC = 5.5V Select 40 µA Input Current VIH = 2.7V All Others 20 IIL LOW Level VCC = 5.5V Select −1 mA Input Current VIL = 0.4V All Others −0.5 IO (Note 2) Output Drive Current VCC = 5.5V, VO = 2.25V −30 −112 mA ICC Supply Current VCC = 5.5V DM74AS157 17.5 28 mA DM74AS158 15.6 22.5 mA |
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