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.
Operating Voltage Range: 1.6V to 6.5V
Single (SGM851CG) or Dual (SGM851A/BC/BG) Push-Button Inputs
Low Supply Current:
SGM851A: 100nA (TYP)
SGM851BC/BG/CG: 50nA (TYP)
Two-State Logic, User-Selectable Input Delay:
SGM851A: 7.5s and 12.5s
SGM851BC/BG/CG: 0s and 7.5s
Fixed Time Reset Pulse at nRST:
SGM851BC: 80ms (TYP)
SGM851BG/CG: 400ms (TYP)
Active-Low, Open-Drain Output
Available in a Green UTDFN-1.45×1-6AL Package
Computers
Gaming Consoles
Portable Equipment
Navigation Devices
Consumer Medical
| Part Number | Status | Package | Pins | Pb-Free | Temp Range | |
| SGM851AXUDL6G/TR | Production | UTDFN-1.45×1-6AL | 6 | Y | -40℃ to +125℃ | Samples |
| SGM851BCXUDL6G/TR | Production | UTDFN-1.45×1-6AL | 6 | Y | -40℃ to +125℃ | Samples |
| SGM851BGXUDL6G/TR | Production | UTDFN-1.45×1-6AL | 6 | Y | -40℃ to +125℃ | Samples |
| SGM851CGXUDL6G/TR | Production | UTDFN-1.45×1-6AL | 6 | Y | -40℃ to +125℃ | Samples |
