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MAX6709FUB Datasheet(PDF) 7 Page - Maxim Integrated Products |
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MAX6709FUB Datasheet(HTML) 7 Page - Maxim Integrated Products |
7 / 13 page Detailed Description The MAX6709/MAX6714 are low-power, quad voltage monitors designed for multivoltage systems. Preset voltage options for 5.0V, 3.3V, 3.0V, 2.5V, and 1.8V make these quad monitors ideal for applications such as telecommunications, desktop and notebook comput- ers, high-end printers, data storage equipment, and networking equipment. The MAX6709/MAX6714 have an internally trimmed threshold that minimizes or eliminates the need for external components. The four open-drain outputs have weak (10µA) internal pullups to VCC, allowing them to interface easily with other logic devices. The weak inter- nal pullups can be overdriven by external pullups to any voltage from 0 to 5.5V. Internal circuitry prevents current flow from the external pullup voltage to VCC. The out- puts can be wire-ORed for a single power-good signal. The MAX6709 quad voltage monitor includes an accu- rate reference, four precision comparators, and a series of internally trimmed resistor-divider networks to set the factory-fixed threshold options. The resistor net- works scale the specified IN_ reset voltages to match the internal reference/comparator voltage. Adjustable threshold options bypass the internal resistor networks and connect directly to one of the comparator inputs (an external resistor-divider network is required for threshold matching). The MAX6709 monitors power supplies with either 5% or 10% tolerance specifica- tions, depending on the selected version. Additional high-input-impedance comparator options can be used Low-Voltage, High-Accuracy Quad, Voltage Monitors in µMAX Package _______________________________________________________________________________________ 7 UNDERVOLTAGE LOCKOUT 0.62V REFERENCE PWRGD3 IN4 (ADJ) IN3 (2.5V/1.8V) IN2 (3.3V/3.0V) IN1 (ADJ) VCC MAX6709 PWRGD4 PWRGD2 PWRGD1 VCC VCC VCC VCC Figure 1. MAX6709 Functional Diagram |
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