ISL88011
5 Ld Voltage Supervisors with Adjustable Power-On Reset, Dual Voltage Monitoring or Watchdog Timer Capability

Key Features

• Single/Dual Voltage Monitoring Supervisors
• Fixed-Voltage Options Allow Precise Monitoring of
  +2.5V, +3.0V, +3.3V, and +5.0V Power Supplies
• Dual Supervisor Has One Fixed Voltage Input and Another That is User-Adjustable Down to 0.6V.
• Both RST and RST Outputs Available
• Adjustable POR Timeout Delay Options
• Watchdog Timer With 1.6s Normal and 51s Start-up Timeout Durations
• Manual Reset Input on All Devices
• Reset Signal Valid Down to V_DD = 1V
• Accurate ±1.5% Voltage Threshold
• Immune to Power-Supply Transients
• Ultra Low 5.5µA Supply Current
• Small 5 Ld SOT-23 Pb-Free Package
• Pb-Free (RoHS Compliant)

Description

The ISL88011 through ISL88015 family of devices offer both fixed and/or adjustable voltage-monitoring that combine popular functions such as Power-On Reset control, Watchdog Timer, Supply Voltage Supervision, and Manual Reset assertion in a small 5 Ld SOT-23 package.

Unique features on the ISL88013 and ISL88015 include a watchdog timer with a 51s start-up timeout and a 1.6s normal timeout duration. On the ISL88011 and ISL88014, users can increase the nominal 200ms Power-On Reset timeout delay by adding an external capacitor to the C_POR pin. Both fixed and adjustable voltage monitors are provided by the ISL88012. Complementary active-low and active-high reset outputs are available on the ISL88011, ISL88012 and ISL88013 devices. All devices provide manual reset capability.

Seven preprogrammed reset threshold voltages accurate to ±1.5% over temperature are offered. The ISL88012, ISL88014 and ISL88015 have a user-adjustable voltage input available for custom monitoring of any voltage down to 0.6V. All parts are specifically designed for low power consumption and high threshold accuracy.

Applications

• Process Control Systems
• Intelligent Instruments
• Embedded Control Systems
• Computer Systems
• Critical µP and µC Power Monitoring
• Portable/Battery-Powered Equipment
• PDA and Handheld PC Devices