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part number : 7457
Description : Frequency divider.Can generate one second timing pulses from 60 Hz.Two '57 devices may be interconnected to give frequency division of 3600 to 1,1800 to 1, 900 to 1, etc. Features a reset pin that is common to all three counters.
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CLKB| 1 8| QC
VCC| 2 7| QB
QA| 3 6| RST
GND| 4 5| CLKA
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