Click here for production status of specific part numbers. MAX6394 High-Accuracy P Reset Circuit General Description Benefits and Features The MAX6394 low-power CMOS microprocessor (P) 0.6% Threshold Accuracy at T = +25C A supervisory circuit is designed to monitor power supplies in 1.0% Threshold Accuracy from -40C to +125C P and digital systems. It offers excellent circuit reliability Small SOT143 Package by providing 1% accurate thresholds over temperature and Open-Drain RESET Output Can Exceed V by eliminating external components and adjustments. The CC MAX6394 also provides a debounced manual reset input. Precision, Factory-Set V Reset Thresholds: CC This device performs a single function: it asserts a reset Nine Options from 2.4V to 4.8V signal whenever the V supply voltage falls below a CC Four Reset Timeout Periods Available: preset threshold or whenever manual reset is asserted. 0.7ms, 14ms, 105ms, and 826ms (minimum) RESET remains asserted for an internally programmed Immune to Short V Transients CC interval (reset timeout period) after V has risen above CC 5A Supply Current the reset threshold or manual reset is deasserted. The MAX6394s open-drain RESET output can be pulled up AEC-Q100 Qualified, Refer to Ordering Information to a voltage higher than V . CC for Specific /V Part The MAX6394 comes with factory-trimmed reset threshold voltages from 2.4V to 4.8V. Preset timeout periods of 0.7ms, 14ms, 105ms, and 826ms are also available. The device comes in a SOT143 package. Ordering Information appears at end of data sheet. Applications Computers Controllers Intelligent Instruments Critical P and C Power Monitoring Portable/Battery-Powered Equipment Pin Configuration Typical Operating Circuit V CC TOP VIEW + VCC MAX6394 LASER- GND 1 4 VCC TRIMMED RESISTORS MAX6394 P RESET RESET RESET RESET 2 3 MR MR CIRCUITRY GND SOT143 19-3202 Rev 5 12/19MAX6394 High-Accuracy P Reset Circuit Absolute Maximum Ratings VCC ......................................................................-0.3V to +6.0V Continuous Power Dissipation (T = +70C) A RESET..................................................................-0.3V to +6.0V SOT143 (derate 3.4mW/C above +70C) ...............275.9mW All Other Pins ........................................... -0.3V to (V + 0.3V) Operating Temperature Range ......................... -40C to +125C CC Input Current (V ) ............................................................20mA Storage Temperature Range ............................ -65C to +160C CC Output Current (RESET) ....................................................20mA Lead Temperature (soldering, 10s) .................................+300C Rate of Rise (V ) .........................................................100V/s CC 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. Package Information 4 SOT23 PACKAGE CODE U4+1/U4+1A 21-0052 Outline Number 90-0183 Land Pattern Number Thermal Resistance, Single-Layer Board Junction to Ambient ( q ) N/A JA Junction to Case ( q ) N/A JC Thermal Resistance, Four-Layer Board Junction to Ambient ( q ) 290 JA Junction to Case ( q ) 100 JC For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a +, , or - in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. www.maximintegrated.com/thermal-tutorial For detailed information on package thermal considerations, refer to . Maxim Integrated 2 www.maximintegrated.com