DATASHEET ISL88021, ISL88022 FN8226 Rev 1.00 Triple Voltage Monitor with Adjustable Power-On-Reset and September 18, 2006 Undervoltage/Overvoltage Monitoring Capability The ISL88021 and ISL88022 family of devices are Features customizable triple voltage-monitoring supervisors that Triple Voltage Monitor and Reset Assertion assert a reset if any of the monitored voltages becomes non-compliant. They offer popular functions such as Low V Detection and Reset Assertion DD Power-On-Reset timing control with both RESET and - Adjustable Reset Threshold Voltages RESET outputs, Supply Voltage Supervision, both under or - 0.6V 6mV Over -40C to +85C overvoltage detection, and Manual Reset assertion. By - Reset Signal Valid to V = 1V DD offering these features in a small 8 Ld MSOP package, the 140ms Minimum Reset Pulse Delay that is Customizable ISL88021 and ISL88022 can lower system cost, reduce Using an External Capacitor board space requirements and increase the reliability of systems. Both RST and RST Outputs Available Applying a voltage to V activates the Power-On-Reset Undervoltage/Overvoltage Monitoring Capability DD circuit which holds RESET low for an adjustable period of Low 20A Consumption time. This allows the power supply and system oscillator to Small 8 Ld MSOP Package stabilize before the processor can execute code. Pb-Free Plus Anneal Available (RoHS Compliant) Low V detection circuitry protects the users system from DD low voltage conditions, resetting the system when V falls DD Applications below its minimum preset voltage threshold V . Reset TH1 remains asserted until V returns to its proper operating Process Control Systems DD level and stabilizes. Two additional voltage monitoring Intelligent Instruments inputs, V2MON (preset) and V3MON (adjustable), monitor Embedded Control Systems other supplies to provide reliable system operation. Computer Systems The ISL88021 V3MON input monitors for undervoltage (UV) conditions whereas the ISL88022 V3MON input allows Portable/Battery-Powered Equipment monitoring for overvoltage (OV) conditions. The monitored Multi-Voltage Systems voltage on V3MON on either device is compared via a resistor divider to a 600mV internal reference. Hence, any Pinout voltage more or less positive than this reference can be ISL88021, ISL88022 accurately monitored to meet specific system level (8 LD MSOP) requirements or to fine-tune the threshold for applications TOP VIEW requiring higher precision. These devices also let users increase the Power-On-Reset 8 1 MR RST time-out delay by connecting a capacitor between C and POR 7 V 2 DD RST ground. This lengthens the period of an internal clock counter thereby increasing the time between voltage 6 V2MON 3 C POR compliance and reset outputs signaling. 5 GND 4 V3MON A manual reset input provides debounce circuitry for minimum reset component count. FN8226 Rev 1.00 Page 1 of 8 September 18, 2006ISL88021, ISL88022 Ordering Information (See Notes) Ordering Information (See Notes) (Continued) PART PART V V2MO V3MON PART PART V V2MO V3MON DD DD NUMBER MARKING V V TYPE PACKAGE NUMBER MARKING V V TYPE PACKAGE TRIP1 TRIP2 TRIP1 TRIP2 ISL88021IU8FAZ ANM 3.09V 1.69V UV 8 Ld MSOP ISL88022IU8HAZ 4.64V 1.69V OV 8 Ld MSOP ISL88021IU8FCZ ANL 3.09V 2.32V UV 8 Ld MSOP ISL88022IU8HCZ 4.64V 2.32V OV 8 Ld MSOP ISL88021IU8FEZ 3.09V 2.92V UV 8 Ld MSOP ISL88022IU8HEZ ANO 4.64V 2.92V OV 8 Ld MSOP ISL88021IU8FFZ 3.09V 3.09V UV 8 Ld MSOP ISL88022IU8HFZ ANN 4.64V 3.09V OV 8 Ld MSOP ISL88021IU8HAZ 4.64V 1.69V UV 8 Ld MSOP NOTES: 1. Standard versions are shown in bold. For non-standard versions, ISL88021IU8HCZ 4.64V 2.32V UV 8 Ld MSOP please contact factory for availability. ISL88021IU8HEZ ANK 4.64V 2.92V UV 8 Ld MSOP 2. Add -TK suffix for Tape and Reel. ISL88021IU8HFZ ANJ 4.64V 3.09V UV 8 Ld MSOP 3. Intersil Pb-free plus anneal products employ special Pb-free material sets molding compounds/die attach materials and 100% ISL88022IU8FAZ ANQ 3.09V 1.69V OV 8 Ld MSOP matte tin plate termination finish, which are RoHS compliant and ISL88022IU8FCZ ANP 3.09V 2.32V OV 8 Ld MSOP compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow ISL88022IU8FEZ 3.09V 2.92V OV 8 Ld MSOP temperatures that meet or exceed the Pb-free requirements of ISL88022IU8FFZ 3.09V 3.09V OV 8 Ld MSOP IPC/JEDEC J STD-020. Block Diagrams V V DD DD RST RST RST RST POR POR V2MON V2MON C C POR POR MR MR V3MON V3MON PB PB V V REF REF GND GND ISL88022 ISL88021 Pin Descriptions ISL88021 ISL88022 NAME FUNCTION 11 MR Active-Low Open Drain Manual Reset Input 22 V Power Supply Input DD 3 3 V2MON Second Undervoltage Monitor Input 4 4 GND Ground 5 V3MON Undervoltage Monitor Input 5 V3MON Overvoltage Monitor Input 66 C Set Power-On-Reset Timeout Delay POR 77 RST Active-Low Open Drain Reset Output 8 8 RST Active-High Push-Pull Reset Output FN8226 Rev 1.00 Page 2 of 8 September 18, 2006