General Description

The MAX16997/MAX16998 are microprocessor (µP) supervisory circuits for high-input-voltage and low-quiescent-current applications. These devices detect downstream circuit failures and provide switchover to redundant circuitry. See the Selector Guide for the different versions of this product family.

The MAX16997/MAX16998 family has four independent inputs for reset and watchdog functions. SWT and SRT inputs independently set the timeout periods of watch dog and reset timers through external capacitors. RESETIN/EN monitor voltages at respective inputs. A resistive voltage-divider sets the reset threshold.

Features

♦ Wide 5V to 40V Input Voltage Range

♦ 18µA Quiescent Current (Typical at +125°C)

♦ Capacitor-Adjustable Timeout Period for Watchdog and Reset

♦ Windowed Watchdog Timer Options (MAX16998B/D)

♦ External Voltage Monitoring (RESETIN for the MAX16998A/B/D and EN for the MAX16997A)

♦ Car Battery-Compatible EN Input

♦ TTL- and CMOS-Compatible Open-Drain Outputs

♦ 18V Maximum Open-Drain Reset Output Voltage

♦ 28V Maximum Open-Drain Enable Output Voltage

♦ Power-On/Power-Off Reset Functionality (MAX16998A/B/D Only)

♦ AECQ-100 Qualified

♦ -40°C to +125°C Operating Temperature Range

♦ Small (3mm x 3mm) µMAX Package

♦ WDI Narrow Pulse Immunity

Applications

  Automotive

  Industrial