MAX801L/M/N, MAX808L/M/N 19-1086 Rev 1 11/05 8-Pin P Supervisory Circuits with 1.5% Reset Accuracy General Description Features The MAX801/MAX808 microprocessor (P) supervisory Precision Voltage Monitoring, 1.5% Reset circuits monitor and control the activities of +5V Ps by Accuracy providing backup-battery switchover, low-line indica- 200ms Power-OK/Reset Time Delay tion, and P reset. Additional features include a watch- RESET Output (MAX808) dog for the MAX801 and CMOS RAM write protection RESET and RESET Outputs (MAX801) for the MAX808. Watchdog Timer (MAX801) The MAX801/MAX808 offer a choice of reset-threshold voltage (denoted by suffix letter): 4.675V (L), 4.575V On-Board Gating of Chip-Enable Signals (MAX808): (N), and 4.425V (M). These devices are available in Memory Write-Cycle Completion 8-pin DIP and SO packages. 3ns CE Gate Propagation Delay 1A Standby Current Applications Power Switching: 250mA in V Mode CC Computers 20mA in Battery-Backup Mode Controllers MaxCap/SuperCap Compatible RESET Guaranteed Valid to V = 1V CC Intelligent Instruments Low-Line Threshold 52mV Above Reset Critical P Power Monitoring Threshold MaxCap is a trademark of The Carborundum Corp. Portable/Battery-Powered Equipment SuperCap is a trademark of Baknor Industries. Embedded Systems Ordering Information PART* TEMP RANGE PIN-PACKAGE MAX801 CPA 0C to +70C 8 Plastic DIP Pin Configurations appear at end of data sheet. MAX801 CSA 0C to +70C 8 SO MAX801 EPA -40C to +85C 8 Plastic DIP MAX801 ESA -40C to +85C 8 SO Typical Operating Circuit MAX801 MJA -55C to +125C 8 CERDIP** MAX808 CPA 0C to +70C 8 Plastic DIP +5V MAX808 CSA 0C to +70C 8 SO MAX808 EPA -40C to +85C 8 Plastic DIP 0.1F 0.1F MAX808 ESA -40C to +85C 8 SO MAX808 MJA -55C to +125C 8 CERDIP** *These parts offer a choice of reset threshold voltage. From the V OUT CC POWER FOR P table below, select the suffix corresponding to the desired thresh- CMOS RAM POWER old and insert it into the blank to complete the part number. BATT LOWLINE NMI **Contact factory for availability and processing to MIL-STD-883. 0.1F Devices in PDIP, SO and MAX packages are available in both RESET RESET leaded and lead-free packaging. Specify lead free by adding the + symbol at the end of the part number when ordering. Lead free P SYSTEM not available for CERDIP package. MAX808 FROM I/O SYSTEM OR CE IN RESET THRESHOLD (V) ADDRESS DECODER SUFFIX MIN TYP MAX CE OUT TO CMOS RAM L 4.60 4.675 4.75 GND N 4.50 4.575 4.65 M 4.35 4.425 4.50 Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.8-Pin P Supervisory Circuits with 1.5% Reset Accuracy ABSOLUTE MAXIMUM RATINGS Input Voltage (with respect to GND) OUT Continuous............................................................500mA V .......................................................................-0.3V to +6V All Other Outputs ............................................................50mA CC V ....................................................................-0.3V to +6V Continuous Power Dissipation (T = +70C) BATT A All Other Pins........................................-0.3V to (V + 0.3V) Plastic DIP (derate 9.09mW/C above +70C) ............727mW OUT Input Current SO (derate 5.88mW/C above +70C).........................471mW V Peak ..........................................................................1.0A CERDIP (derate 8.00mW/C above +70C).................640mW CC V Continuous ............................................................500mA Operating Temperature Ranges CC I Peak.....................................................................250mA MAX801 C A/MAX808 C A...............................0C to +70C BATT I Continuous ............................................................50mA MAX801 E A/MAX808 E A ............................-40C to +85C BATT GND ................................................................................50mA MAX801 MJA/MAX808 MJA.........................-55C to +125C All Other Inputs ...............................................................50mA Storage Temperature Range .............................-65C to +160C Output Current Lead Temperature (soldering, 10sec) .............................+300C OUT Peak..........................................................................1.0A Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = 4.6V to 5.5V for the MAX80 L, V = 4.5V to 5.5V for the MAX80 N, V = 4.35V to 5.5V for the MAX80 M V = 2.8V CC CC CC BATT T = T to T . Typical values are at V = 5V and T = +25C, unless otherwise noted.) A MIN MAX CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Voltage Range 0 X 5.5 V V , BATT (Note 1) CC I = 25mA V - 0.02 OUT CC V = 4.5V I = 250mA, MAX80 C/E V - 0.38 V - 0.25 V in Normal Operating CC OUT CC CC OUT V Mode I = 250mA, MAX80 M V - 0.45 OUT CC V = 3V, V = 2.8V, I = 100mA V - 0.25 V - 0.12 CC BATT OUT CC CC MAX80 C/E 1.0 1.5 V = 4.5V, CC V to OUT CC I = 250mA OUT MAX80 M 1.8 On-Resistance V = 3V, I = 100mA 1.2 2.5 CC OUT V = 4.5V, I = 20mA V - 0.16 BATT OUT BATT V in Battery-Backup OUT V = 0V V = 2.8V, I = 10mA V - 0.25 V - 0.12 V CC BATT OUT BATT BATT Mode V = 2.0V, I = 5mA V - 0.20 V - 0.08 BATT OUT BATT BATT V = 4.5V, I = 20mA 8 BATT OUT BATT to OUT V = 0V V = 2.8V, I = 10mA 12 25 CC BATT OUT On-Resistance V = 2.0V, I = 5mA 16 40 BATT OUT Supply Current in Normal MAX801 68 110 Operating Mode A MAX808 48 90 (excludes I ) OUT T = +25C 0.4 1 A Supply Current in Battery- V = 0V, CC Backup Mode (excludes MAX80 C/E 5 A T = T A MIN V = 2.8V BATT I ) (Note 2) OUT to T MAX MAX80 M 50 T = +25C -0.1 0.1 BATT Standby Current V + 0.2V A BATT A (Note 3) V CC T = T to T -1.0 1.0 A MIN MAX Power-up V + 0.05 BATT Battery-Switchover V = 2.8V V BATT Threshold Power-down V BATT Battery-Switchover 50 mV Hysteresis 2 MAX801L/M/N, MAX808L/M/N