ISL88707

Features:

•Fixed-Voltage Options Allow Precise Monitoring of +3.0V,
+3.3V, and +5.0V Power Supplies
•Additional Voltage Monitor for Power-Fail Detection or Low-Battery Warning
-Monitors Voltages Down to 1.25V
-Adjustable Power-Fail Input Threshold
•Watchdog Timer Capability With 1.6s Time-out
•Both RST and RSTOutputs Available
•140ms Minimum Reset Pulse Width with Option to Customize Using an External Capacitor
•Manual Reset Input On All Devices
•Reset Signal Valid Down to VDD = 1V
•Accurate ±1.8% Voltage Threshold
•Immune to Power-Supply Transients
•Ultra Low 10µA Maximum Supply Current at 3V
•Pb-Free Plus Anneal Available (RoHS Compliant)




Application

•Portable/Battery Powered Equipment
•Notebook/Desktop Computer Systems
•Designs Using DSPs, Microcontrollers or Microprocessors
•Controllers
•Intelligent Instruments
•Communications Systems
•Industrial Equipment




Pinout

Specifications

Temperature Under Bias . . . . . . . . . . . . . . . . . . . . .-40°C to +125°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . -65°C to +150°C
Voltage on any Pin with Respect to GND . . . . . . . . . . . .-1.0V to +7V
DC Output Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA
Lead Temperature (Soldering, 10s). . . . . . . . . . . . . . . . . . . . .300°C
ESD Classification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .2.0kV HBM
200V MM
1kV CDM
Temperature Range (Industrial). . . . . . . . . . . . . . . . .-40°C to 85°C

Description

Designed with high reset threshold accuracy and low power consumption, the ISL88705, ISL88706, ISL88707, ISL88708, ISL88716 and ISL88813 devices are microprocessor supervisors that are designed to monitor power-supply and battery functions in microprocessor systems. They can help to lower system cost, reduce board space requirements and increase the reliability of systems. These devices provide essential functions such as supply voltage supervision by asserting a reset output during power-up and power-down as well as during brownout conditions. An auxiliary voltage monitor is provided for detecting power failures warning the system of low battery conditions or presence detection. In addition, an independent watchdog timer helps to monitor microprocessor activity every 1.6s (typical). An active-low manual reset is offered and reset signals remain asserted until VDD returns to proper operating levels. Users can increase the nominal 200ms power-on reset time-out delay by adding an external capacitor to the CPOR pin on the ISL88707 and ISL88708.