GENERAL DEscriptION

The SGM824 is a complete microprocessor supervisory device which combines reset and watchdog functions in a SOT-23-5 package. System reliability is significantly improved by such integration compared to the designs with individual ICs or discrete components. The SGM824 also features an excellent transient immunity to ignore fast VCC transients.

This device has an active-low push-pull reset output (nRESET) that is activated by a watchdog expiry event or due to a low VCC voltage. The nRESET output can still be in the correct logic state even if VCC is lower than 1V. The SGM824 is offered in four fixed VCC reset threshold voltages.

The SGM824 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 SGM824-L

  3.08V for SGM824-T

  2.93V for SGM824-S

  2.63V for SGM824-R

• Guaranteed Reset Valid at VCC = 1V

• Two Reset Output Options

  Push-Pull nRESET

  Push-Pull RESET

• Reset Pulse Width: 200ms (TYP)

• Debounced TTL/CMOS-Compatible

• 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