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ADM8698 Datasheet(PDF) 3 Page - Analog Devices |
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ADM8698 Datasheet(HTML) 3 Page - Analog Devices |
3 / 4 page ADM8698/ADM8699 REV. 0 –3– PIN FUNCTION DESCRIPTIONS Mnemonic Function VCC +5 V Power Supply Input. GND 0 V. Ground reference for all signals. RESET Logic Output. RESET goes low whenever VCC falls below the reset voltage threshold (4.65 V typ). RESET remains low for a minimum of 140 ms after VCC returns to 5 V. RESET also goes low for a minimum of 140 ms if the watchdog timer is enabled but not serviced within its time- out period. WDI Watchdog Input. WDI is a three level input. If WDI remains either high or low for longer than the watchdog timeout period, RESET pulses low and WDO goes low. The timer resets with each transition on the WDI line. The watchdog timer may be disabled if WDI is left floating or is driven to midsupply. RESET (SOIC packages only) Logic Output. RESET is an active high output. It is the inverse of RESET. WDO (SOIC ADM8699 only) Logic Output. The Watchdog Output, WDO, goes low if WDI remains either high or low for longer than the watchdog timeout period. WDO is set high by the next transition at WDI. If WDI is unconnected or at midsupply, the watchdog timer is disabled and WDO remains high. PIN CONFIGURATIONS 8-Lead DIP & SOIC 1 2 3 4 8 7 6 5 TOP VIEW (Not to Scale) O TOP VIEW (Not to Scale) ADM8698/ ADM8699 V CC V CC GND GND GND NC (WDI) * NC *( ) ADM8699 ONLY RESET NC = NO CONNECT 16-Lead SOIC 1 2 3 4 16 15 14 13 TOP VIEW (Not to Scale) O 5 12 611 710 89 TOP VIEW (Not to Scale) ADM8698/ ADM8699 GND V CC V CC GND NC NC NC NC RESET NC NC NC (WDI) * NC GND RESET NC (WDO) * *( ) ADM8699 ONLY NC = NO CONNECT TYPICAL PERFORMANCE CURVES 10 90 100 0% 1V A4 500ms 3.36 V 1V Figure 1. RESET Output Voltage vs. VCC TEMPERATURE – °C –50 90 –30 –10 10 30 50 70 230 170 200 220 210 190 180 Figure 2. RESET Timeout Delay vs. Temperature TEMPERATURE – °C –60 –30 0 30 60 90 120 4.69 4.57 4.63 4.67 4.65 4.61 4.59 4.55 Figure 3. RESET Voltage Threshold vs. Temperature |
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