封装管脚图
产品描述
The SGM811/SGM812 supervisory circuits monitor the power supply voltage in microprocessor and digital systems. The SGM811/SGM812 is designed to monitor seven different voltages; these voltages have been selected for the effective monitoring of 2.5V, 3V, 3.3V, and 5V supply voltage levels.
They provide a reset output during power-up, power-down and brownout conditions. On power-up, an internal timer holds reset asserted for 240ms. This holds the microprocessor in a reset state until conditions have stabilized. The output remains operational with V CC as low as 1V. The SGM811 provides an active low reset signal ( ) while the SGM812 provides an active high signal (RESET) output.
The SGM811/SGM812 has a manual reset input. The manual reset function is very useful, especially if the circuit in which the SGM811/SGM812 is operating enters into a state that can only be detected by the user. Allowing the user to reset a system manually can reduce the damage or danger that could otherwise be caused by an out-of-control or locked system. The devices come in SOT-143 and SOT-23-5 packages.
产品特性
Superior Upgrade for MAX811/MAX812 and ADM811/ADM812
Specified Over Temperature
Low Power Consumption (13 μ A TYP)
Precision Voltage Monitor: 2.5V, 3V, 3.3V, 5V Options
Reset Assertion Down to 1V V CC
150ms Min Power-On Reset
Logic Low Output (SGM811)
Logic High RESET Output (SGM812)
Manual Reset Input
Green SOT-143 and SOT-23-5 Packages