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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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L4988D датащи(PDF) 6 Page - STMicroelectronics |
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L4988D датащи(HTML) 6 Page - STMicroelectronics |
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6 / 32 page  Block diagram and pin configuration L4988 6/32 DS5334 Rev 8 Figure 2.Pins configuration Table 2. Pins description Pin name SO8(D) S020(MD) Function WEn 1 1 Watchdog Enable input If high watchdog functionality is active Gnd 2 4 Ground reference Gnd 5, 6, 15, 16 Ground. Connected these pins to a heat spreader ground Res 3 7 Reset output. It is pulled down when output voltage goes below Vo_th or frequency at Wi is too low. Vcr 4 10 Reset timing adjust. A capacitor between Vcr pin and gnd, sets the reset delay time (trd) Vcw 5 11 Watchdog timer adjust A capacitor between Vcw pin and gnd, sets the time response of the watchdog monitor. Wi 6 14 Watchdog input. If the frequency at this input pin is too low, the Reset output is activated. Vo 7 17 Voltage regulator output Block to ground with a capacitor >100nF (needed for regulator stability) Vs 8 20 Supply voltage Block to ground directly at IC pin with a capacitor N.C. 2, 3, 8, 9, 12, 13, 18, 19 Not connected |
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