DATASHEET ISL88042 FN6655 Rev 2.00 Quadruple Voltage Monitor July 26, 2010 The ISL88042 is a Quadruple voltage-monitoring supervisor Features combining competitive reset threshold accuracy and low Quadruple Voltage Monitoring power consumption. This device combines popular functions such as Power-On Reset, Undervoltage Supply Supervision, Fixed-Voltage Options Allow Precise Monitoring of +5.0V reset signaling and Manual Reset. Monitoring four different and +3.3V Power Supplies supplies in a 8 Ld 2x3 TDFN package, the ISL88042 devices Two Adjustable Voltage Inputs Monitor Voltages > 0.6V can help to lower system cost, reduce board space 95ms Nominal Reset Pulse Width requirements, and increase the reliability of multi-voltage systems. Manual Reset Capability Low V detection circuitry protects the users system from DD Reset Signals Valid Down to V = 1V DD low voltage conditions, resetting the system when V or DD Immune to Power-Supply Transients any of the other monitored power supply voltages fall below their respective minimum voltage thresholds. The reset Low 22A Maximum Supply Current at 5V signal remains asserted until all of these voltages return to Pb-Free (RoHS Compliant) proper operating levels and stabilize. Applications Two of the four voltage monitors have preset thresholds for either dual 3.3V or one each for one 5V and one 3.3V Telecom and Datacom Systems supplies. Users can adjust the threshold voltages of the third Routers and Servers and fourth voltage monitors in order to meet specific system level requirements. Access Concentrators Cable/Satellite Applications Pinout Desktop and Notebook Computer Systems ISL88042 (8 LD TDFN) Data Storage Equipment TOP VIEW Set-Top Boxes 1 8 MR RST Industrial Equipment EPAD V 2 7 V DD DDA Multi-Voltage Systems V2MON 3 6 V4MON (GND) GND 4 5 V3MON Ordering Information PACKAGE PART NUMBER PART V V TEMP RANGE Tape & Reel PKG. TH1 TH2 (Notes 1, 2) MARKING (V) (V) (C) (Pb-free) DWG. ISL88042IRTHFZ-T 4P6 4.60 3.09 -40 to +85 8 Ld TDFN L8.2x3A ISL88042IRTHFZ-TK 4P6 4.60 3.09 -40 to +85 8 Ld TDFN L8.2x3A ISL88042IRTEEZ-T 2P9 2.87 2.95 -40 to +85 8 Ld TDFN L8.2x3A ISL88042IRTEEZ-TK 2P9 2.87 2.95 -40 to +85 8 Ld TDFN L8.2x3A ISL88042IRTJJZ-T 2P8 2.78 2.86 -40 to +85 8 Ld TDFN L8.2x3A ISL88042IRTJJZ-TK 2P8 2.78 2.86 -40 to +85 8 Ld TDFN L8.2x3A NOTES: 1. Please refer to TB347 for details on reel specifications. 2. 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. FN6655 Rev 2.00 Page 1 of 8 July 26, 2010ISL88042 Pin Descriptions ISL88042 PIN NUMBER PIN NAME FUNCTION 1MR Active-Low open drain manual reset input with internal pull-up resistor 2V Chip Bias Input and primary integrated preset undervoltage monitor DD 3 V2MON Secondary integrated preset undervoltage monitor input 4 GND Ground 5 V3MON Adjustable undervoltage monitor input 6 V4MON Adjustable undervoltage monitor input 7V Must be tied to V for proper operation DDA DD 8RST Active-low open drain reset output Functional Block Diagram V DD MR POR PB V REF RST t POR V2MON V4MON V V REF REF V3MON GND V REF FN6655 Rev 2.00 Page 2 of 8 July 26, 2010