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ADM812 Datasheet(PDF) 8 Page - Analog Devices |
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ADM812 Datasheet(HTML) 8 Page - Analog Devices |
8 / 12 page ADM811/ADM812 Data Sheet Rev. G | Page 8 of 12 INTERFACING TO OTHER DEVICES OUTPUT The ADM811/ADM812 are designed to integrate with as many devices as possible. One feature of the ADM811/ADM812 is the reset output, which is directly proportional to VCC (this is guar- anteed only while VCC is greater than 1 V). This enables the part to be used with both 3 V and 5 V, or any nominal voltage within the minimum and maximum specifications for VCC. BENEFITS OF A VERY ACCURATE RESET THRESHOLD Because the ADM811/ADM812 can operate effectively even when there are large degradations of the supply voltages, the possibility of a malfunction during a power failure is greatly reduced. Another advantage of the ADM811/ADM812 is its very accurate internal voltage reference circuit. Combined, these benefits produce an exceptionally reliable microprocessor supervisory circuit. ADM811 GND VCC VCC RESET Figure 11. Ensuring a Valid RESET Output Down to VCC = 0 V ENSURING A VALID RESET/RESET OUTPUT DOWN TO VCC = 0 V When VCC falls below 0.8 V, the RESET/RESET of the ADM811/ ADM812 no longer sinks current. Therefore, a high impedance CMOS logic input connected to RESET/RESET can drift to undetermined logic levels. To eliminate this problem, a 100 kΩ resistor should be connected from RESET/RESET to ground. |
Similar Part No. - ADM812_15 |
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Similar Description - ADM812_15 |
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