Datasheet > SGM821

SGM821

更新时间： 2024-09-28 11:15:51

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圣邦微 - SGMICRO		/
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描述
Nano-Power System Timer with Watchdog Function

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SGM821 数据手册

SGM821

Nano-Power System Timer

with Watchdog Function

GENERAL DESCRIPTION

FEATURES

● Supply Voltage Range: 1.8V to 5.5V

● Low Current Consumption: 35nA (TYP)

● Programmable Watchdog Time:

100ms to 8200s (TYP)

The SGM821 is an ultra-low power and programmable

watchdog timer designed for system wake-up in

duty-cycled and battery-powered applications.

The SGM821 with programmable interrupt timer

consumes only 35nA (TYP) system current. Accordingly,

the system can be placed in sleeping mode, consuming

less power, and only returning to active mode when the

device is interrupted. The SGM821 is ideal for wireless

sensor applications or other applications with smaller

batteries compared to the μC that typically costs

micro-amps of total system current. The watchdog

timer of the SGM821 can be programmed by an

external resistor of 500Ω to 180kΩ. And it provides a

corresponding time interval from 100ms to 8200s (TYP).

● Manual Reset Input

● Available in Green SOT-23-6 and TDFN-2×2-6AL

Packages

APPLICATIONS

Low Power Systems

IoT

Tamper Detectors

Smart Home Controllers

Wireless Sensors

The SGM821 is available in Green SOT-23-6 and

TDFN-2×2-6AL packages. It operates over a junction

temperature range of -40℃ to +105℃.

TYPICAL APPLICATION

R₁

R_P

VDD

VOUT

Power

Management

VDD

RSTn

SGM821

RSTn

μC

C₁

VIN

WAKE

DONE

GPIO

DELAY/

M_RST

Battery

GND

R_EXT

GND

Figure 1. Simplified Application Schematic

SG Micro Corp

APRIL2022–REV. A

www.sg-micro.com

12 3 4 5 6 7...16

中文翻译

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