3/3.3/4.0V µP Supervisor Circuits

– Low supply current

– Watchdog timer

– Brownout detection

The IMP706P/R/S/T/J and IMP708R/S/T/J CMOS supervisor circuits monitor power-supply and battery voltage level, and µP/µC operation. A reset is generated when the supply drops below 2.63V (IMP706P/R, IMP708R), 2.93V (IMP706S, IMP708S), 3.08V (IMP706T, IMP708T) or 4.00 (IMP706J, IMP708J).

The family offers several functional options. Each device generates a reset signal during power-up, power-down and during brownout conditions.

Key Features

◆ Lower power, pin compatible replacements for Maxim MAX706P/R/S/T, MAX708R/S/T

   – 30% lower supply current:140µA vs. 200µA

◆ Precision power supply monitor

   – 2.63V threshold (IMP706P/R, IMP708R)

   – 2.93V threshold (IMP706S, IMP708S)

   – 3.08V threshold (IMP706T, IMP708T)

   – New 4.00V threshold (IMP706J, IMP708J)

◆ Debounced manual reset input

◆ Auxiliary voltage monitor comparator

   – 1.25V threshold

   – Battery monitor/auxiliary supply monitor

◆ Watchdog timer (IMP706P/R/S/T/J)

   – Watchdog can be disabled by floating WDI

◆ 200ms reset time delay

◆ Three reset signal options

   – Active HIGH: IMP706P

   – Active LOW: IMP706R/S/T/J

   – Active HIGH & LOW outputs: IMP708R/S/T/J

◆ DIP, SO and MicroSO packages

◆ Guaranteed RESET assertion to VCC = 1.1V

Applications

◆ Computers and controllers

◆ CTI applications

◆ Embedded controllers

◆ Battery operated systems

◆ Intelligent instruments

◆ Wireless communication systems

◆ PDAs and handheld equipment