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IMP706TEPA Datasheet(PDF) 5 Page - IMP, Inc |
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IMP706TEPA Datasheet(HTML) 5 Page - IMP, Inc |
5 / 8 page Pin Number IMP706P IMP706R/S/T/J IMP708R/S/T/J DIP/SO MicroSO DIP/SO MicroSO DIP/SO MicroSO Name Function Manual reset input. The active LOW input triggers a reset pulse. It is pulled HIGH by a 20k Ω pull-up 1 3 1 3 1 3 MR resistor. It is compatible with TTL/CMOS signals when VCC = 5V. It can be shorted to ground through a mechanical switch. Leave floating or connect to VCC if the function is not used. 2 424 2 4 VCC Monitored power supply input. 3 5 3 5 3 5 GND Ground Power-fail input voltage monitor. With PFI less than 4 6 4 6 4 6 PFI 1.25V, PFO goes LOW. Connect PFI to ground when not used. Power-fail output. The output is active LOW and 5 7 5 7 5 7 PFO sinks current when PFI is less than 1.25V. If not used, leave the pin unconnected. Watchdog input. WDI controls the internal watchdog timer. A HIGH or LOW signal for 1.6 sec at WDI allows the internal timer to run-out, setting WDO low. 6 868 —— WDI A rising or falling edge must occur at WDI within 1.6 seconds or WDO goes LOW. The watchdog function is disabled by floating WDI. The internal watchdog timer clears when: RESET is asserted; WDI is three-stated; or WDI sees a rising or falling edge. — ——— 6 8 NC Not connected. Active-LOW reset output. Pulses LOW for 200ms when triggered, and stays LOW whenever VCC is —— 7 1 7 1 RESET below the reset threshold. RESET remains LOW for 200ms after VCC rises above the RESET threshold or MR goes from HIGH to LOW. A watchdog timeout will not trigger RESET unless WDO is connected to MR. Watchdog output. WDO goes LOW when the 1.6 second internal watchdog timer times-out and does not go HIGH until a transition occurs at WDI. In 8 282 —— WDO addition, when VCC falls below the reset threshold, WDO goes LOW. Unlike RESET, WDO does not have a minimum pulse width and as soon as VCC exceeds the reset threshold, WDO becomes HIGH with no delay. 71 —— 8 2 RESET Active-HIGH reset output. RESET is the inverse of RESET. IMP706P/R/S/T/J, IMP708R/S/T/J IMP706P/R/S/T/J, IMP708R/S/T/J Pin Descriptions Feature Summary © 1999 IMP, Inc. 408-432-9100/www.impweb.com 5 IMP706P IMP706R IMP706S IMP706T IMP706J IMP708R IMP708S IMP708T IMP708J Power-fail detector III I I I I I I Brownout detection III I I I I I I Debounced manual RESET input III I I I I I I Power-up/down RESET III I I I I I I Watchdog timer III I I Active-HIGH RESET I Active-LOW RESET II I I Active-LOW and HIGH RESETs II I I RESET threshold 2.63V 2.63V 2.93V 3.08V 4.00V 2.63V 2.93V 3.08V 4.00V |
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