GENERAL DEscriptION

The SGM823 is an integrated microprocessor supervisory device with watchdog and manual reset functions. Compared with the design using a single IC or discrete components, this integration design has the advantage of improving system stability and accuracy. The special design on SGM823 can ignore the fast transients on VCC.

The SGM823 has four fixed reset threshold voltages of 4.63V, 3.08V, 2.93V and 2.63V. When VCC is as low as 1V, the reset output can still operate. And it also has a low-level active manual reset nMR function.

The SGM823 is available in a Green SOT-23-5 package. It operates over an ambient temperature range of -40℃ to +125℃.

PIN CONFIGURATIONS

FEATURES

• Ultra-Low Supply Current: < 1μA (TYP)

• Precision Supply-Voltage Monitor

  4.63V for SGM823-L

  3.08V for SGM823-T

  2.93V for SGM823-S

  2.63V for SGM823-R

• Guaranteed nRESET Valid at VCC = 1V

• Push-Pull nRESET Output

• Reset Pulse Width: 200ms (TYP)

• Debounced TTL/CMOS-Compatible

• Manual Reset Input

• Watchdog Timer with 1.6s (TYP) Timeout

• Fully Specified over Temperature

• Power-Supply Transient Immunity

• Without External Components

• -40℃ to +125℃ Operating Temperature Range

• Available in a Green SOT-23-5 Package

APPLICATIONS

Computers

Portable Equipment

Automotive Equipment

Intelligent Instruments

Critical μP Power Monitoring