DATASHEET ISL88041 FN9229 Rev 2.00 Quad Voltage Monitor April 29, 2010 The ISL88041 is a quad voltage-monitoring supervisor Features designed to monitor voltages 0.7V. Low voltage detection Quad Voltage Monitoring circuitry protects the user s system from low voltage conditions, resetting the system when any of the monitored Adjustable Voltage Inputs Monitor Voltages 0.7V power supply voltages V1MON-V4MON fall below their Active-Low RST Output respective minimum voltage thresholds. The reset signal Manual Reset Capability remains asserted until all of these voltages return to proper operating levels and stabilize. Reset Signal Valid Down to V = 1V DD Each rails VMON point is independently adjustable by using Integrated 20k Pull-Up Resistor on RST an external resistor divider. The VMON inputs will ignore Glitch Immunity on Voltage Monitoring Inputs transients of less than 30s on the monitored supplies, and the RST output is guaranteed to be valid down to V = 1V. Pb-Free (RoHS Compliant) DD The RST output is open-drain to allow ORing of multiple Applications signals and interfacing to a wide range of logic levels. Also, the MR input allows the user to assert reset when this input Graphics Cards is pulled low. Multi Voltage DSPs and Processors Pinout P Voltage Monitoring ISL88041 Embedded Control Systems (8 LD SOIC) TOP VIEW Intelligent Instruments Medical Equipment V 1 8 V1MON DD Network Routers RST 2 7 V2MON Portable Battery-Powered Equipment MR 3 6 V3MON Set-Top Boxes GND 4 5 V4MON Telecommunications Systems Ordering Information PART TEMP. NUMBER PART RANGE PACKAGE PKG. (Note) MARKING (C) (Pb-Free) DWG. ISL88041IBZ* 88041 IBZ -40 to +85 8 Ld SOIC M8.15 (Pb-free) *Add -T suffix for tape and reel. Please refer to TB347 for details on reel specifications. NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. FN9229 Rev 2.00 Page 1 of 7 April 29, 2010ISL88041 Pin Descriptions ISL88041 PIN NAME FUNCTION DESCRIPTION 1V Bias IC from nominal 2.7V to 4V. DD 2RST Active-Low Open Drain Reset Output. Internal 20k pull-up resistor to V . DD 3MR Active Low Open Drain MR Input has a 10A pull-up to V . DD 4 GND Ground. 5 V4MON Fourth Adjustable Undervoltage Monitor Input 6 V3MON Third Adjustable Undervoltage Monitor Input 7 V2MON Second Adjustable Undervoltage Monitor Input 8 V1MON First Adjustable Undervoltage Monitor Input Functional Block Diagram V DD MR POR PB V1MON 30s FILTER RST V REF V2MON V4MON 30s 30s FILTER FILTER V V REF REF V3MON 30s FILTER GND V REF V = 635mV REF FN9229 Rev 2.00 Page 2 of 7 April 29, 2010