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SN74LS90 Datasheet(PDF) 4 Page - ON Semiconductor |
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SN74LS90 Datasheet(HTML) 4 Page - ON Semiconductor |
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SN74LS90 http://onsemi.com 4 LS90 MODE SELECTION RESET / SET INPUTS OUTPUTS MR1 MR2 MS1 MS2 Q0 Q1 Q2 Q3 H H X L X L X H H X X L X L L X H L X X L L L H L L L L L L L L H Count Count Count Count X L H X L L X H = HIGH Voltage Level L = LOW Voltage Level X = Don’t Care LS92 AND LS93 MODE SELECTION RESET INPUTS OUTPUTS MR1 MR2 Q0 Q1 Q2 Q3 H L H L H H L L LL LL Count Count Count H = HIGH Voltage Level L = LOW Voltage Level X = Don’t Care LS90 BCD COUNT SEQUENCE COUNT OUTPUT Q0 Q1 Q2 Q3 0 1 2 3 4 5 6 7 8 9 L H L H L H L H L H L L H H L L H H L L L L L L H H H H L L L L L L L L L L H H NOTE: Output Q0 is connected to Input CP1 for BCD count. LS92 TRUTH TABLE COUNT OUTPUT Q0 Q1 Q2 Q3 0 1 2 3 4 5 6 7 8 9 10 11 L H L H L H L H L H L H L L H H L L L L H H L L L L L L H H L L L L H H L L L L L L H H H H H H NOTE: Output Q0 is connected to Input CP1. LS93 TRUTH TABLE COUNT OUTPUT Q0 Q1 Q2 Q3 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 L H L H L H L H L H L H L H L H L L H H L L H H L L H H L L H H L L L L H H H H L L L L H H H H L L L L L L L L H H H H H H H H NOTE: Output Q0 is connected to Input CP1. GUARANTEED OPERATING RANGES Symbol Parameter Min Typ Max Unit VCC Supply Voltage 54 74 4.5 4.75 5.0 5.0 5.5 5.25 V TA Operating Ambient Temperature Range 54 74 −55 0 25 25 125 70 °C IOH Output Current — High 54, 74 −0.4 mA IOL Output Current — Low 54 74 4.0 8.0 mA |
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