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MAX6841FUKD0 Datasheet(PDF) 7 Page - Maxim Integrated Products |
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MAX6841FUKD0 Datasheet(HTML) 7 Page - Maxim Integrated Products |
7 / 9 page Using the MAX6842/MAX6845 Open-Drain RESET Output with Multiple Supplies Generally, the pullup connected to the MAX6842/ MAX6845 connects to the supply voltage being moni- tored at the IC’s VCC pin. However, some systems use the open-drain output to level-shift from the monitored supply to reset circuitry powered by some other supply (Figure 5). Note that as the MAX6842/MAX6845’s VCC decreases, so does the IC’s ability to sink current at RESET. Also, with any pullup, RESET is pulled high as VCC decays toward 0. The voltage where this occurs depends on the pullup resistor value and the voltage to which it is connected. Chip Information TRANSISTOR COUNT: 788 PROCESS: BiCMOS Ultra-Low-Voltage µP Reset Circuits and Voltage Detectors _______________________________________________________________________________________ 7 Table 1. Threshold Suffix Guide MAX6842 MAX6845 VCC RESET GND VCC RESET GND RPULLUP 0.9V µP +5.0V Figure 5. Using the MAX6842/MAX6845 Open-Drain RESET Output with Multiple Supplies SUFFIX RESET THRESHOLD (V) I 1.388 H 1.313 G 1.110 F 1.050 E 0.833 D 0.788 Table 2. Active Timeout Period Guide RESET ACTIVE TIMEOUT PERIOD (ms) SUFFIX MIN TYP MAX D0 — 0.15 — D1 1 1.5 2 D2 20 30 40 D3 140 210 280 D4 1120 1680 2240 Table 3. Standard Versions DEVICE TOP MARK MAX6841HUKD0 AEDR MAX6841HUKD3 AEDS MAX6841FUKD0 AEDP MAX6841FUKD3 AEDQ MAX6841DUKD0 AEDN MAX6841DUKD3 AEDO MAX6842HUKD0 AEDX MAX6842HUKD3 AEDY MAX6842FUKD0 AEDV MAX6842FUKD3 AEDW MAX6842DUKD0 AEDT MAX6842DUKD3 AEDU MAX6843UKD0 AEDZ MAX6843UKD3 AEAV MAX6844UKD0 AEEB MAX6844UKD3 AEEC MAX6845UKD0 AEAX MAX6845UKD3 AEAY |
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