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FAN3240 Arkusz danych(PDF) 5 Page - ON Semiconductor |
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FAN3240 Arkusz danych(HTML) 5 Page - ON Semiconductor |
5 / 21 page © 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN3240 • Rev. 1.0.2 4 Configurations The FAN324x products are set at the factory with the following configurations. tQUAL tMAX OUT Mode FAN3240 15 ms 150 ms tOUT = tIN FAN3241 1 ms 30 ms tOUT = tMAX Contact your Fairchild sales representatives for additional configurations. The parameter tQUAL can be configured between 128 µs and 20 ms and tMAX can be programmed between 1 ms and 350 ms. where: tQUAL: Qualification Time. The minimum input pulse width duration recognized as a valid input command. tMAX: Maximum Output Pulse Width. Output pulses are terminated after this time interval even if the input pulse is longer or held in a HIGH state continuously. OUT Mode: Output Mode. TheFAN324x offers two fundamentally different output pulse generation methods: tOUT = tIN < tMAX. In this mode, the output pulse duration (tOUT) replicates the length of the input pulse (tIN) up to tMAX. tOUT = tMAX. The output is on for a fixed time interval of tMAX, regardless of the input pulse width. The mode of operation has no impact on the qualification requirements or on the maximum output pulse width limiting. In both output operating modes, the qualification requirement must be met (tIN > tQUAL) to produce an output pulse. Output Logic (7) EN IN1 IN2 OUT1 OUT2 0 0 0 H H 0 0 1 H H 0 1 0 H H 0 1 1 H H 1 0 0 H H 1 0 1 H L 1 1 0 L H 1 1 1 H H Note: 7. Inputs and EN are defined as logic signals (positive logic; 1 is active), outputs are defined as HIGH or LOW impedance due to the open-drain output structures. Low output impedance is needed to energize the relay coil. |
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