SGM851

The SGM851 family is a push-button controller with configurable delay, which has the advantages of low supply current and ultra-small package size. The device has a long timing delay to reset the system as required, and enter the low-power mode after the timing delay ends. It can not only avoid the reset caused by the button closing or pressing for a short time, but also distinguish hard system reset and software interruption.

The input pins of SGM851A/BC/BG are PB1 and PB2, while the input pin of SGM851CG is PB1. The output pin of all devices is an active-low, open-drain output (nRST). For SGM851A, nRST goes low when both PB1 and PB2 remain low for the set timing delay, and nRST goes high when either a PBx input goes high. For SGM851BC/BG, nRST goes low when both PB1 and PB2 remain low for the set timing delay, and nRST goes high after a fixed time reset pulse. For SGM851CG, nRST goes low when PB1 remain low for the set timing delay, and nRST goes high after a fixed time reset pulse.

The nRST pin is an active-low, open-drain output and can be wire-ORed with other open-drain devices. All devices have the advantages of accurate reset, low supply current and ultra-small size in applications.

The SGM851 family is available in a Green UTDFN-1.45×1-6AL package. They specified over the extended -40℃ to +125℃ temperature range.