MAX6339 19-1756 Rev 3 12/05 Quad Voltage P Supervisory Circuit in SOT Package General Description Features The MAX6339 is a precision quad voltage monitor with Monitors Four Power-Supply Voltages microprocessor (P) supervisory reset timing. The device Precision Factory-Set Reset Threshold Options can monitor up to four system supply voltages without for +5.0V, +3.3V, +3.0, +2.5V, +1.8V, and -5.0V any external components and asserts a single reset if any supply voltage drops below its preset threshold. The Supplies device significantly reduces system size and component User-Adjustable Voltage Monitoring Threshold count while improving reliability compared to separate Options ICs or discrete components. Low 55A Supply Current A variety of factory-trimmed threshold voltages are avail- able to accommodate different supply voltages and toler- Open-Drain RESET Output with 10A Internal ances with minimal external component requirements. Pullup The selection includes internally fixed options for monitor- 140ms (min) Reset Timeout Period ing +5.0V, +3.3V, +3.0V, +2.5V, +1.8V, and -5.0V sup- plies with -5% and/or -10% tolerances. The device is also RESET Valid to IN1 = 1V or IN2 = 1V available with one or two user-adjustable threshold Immune to Short Monitored Supply Transients options if non-standard thresholds are desired (use exter- nal resistor-divider network). No External Components Required The quad monitor provides a single active-low reset out- Guaranteed from -40C to +85C put that is asserted when any monitored input is below its associated threshold. The output is open drain with a Small 6-Pin SOT23 Package weak internal pullup (10A) to IN2. Reset remains low for a reset timeout period (140ms min) after all voltages are above the selected thresholds. The output is valid as long Ordering Information as either the IN1 or IN2 input voltage remains > 1V. PART TEMP. RANGE PIN-PACKAGE The MAX6339 is available in a small 6-pin SOT23 pack- MAX6339 UT-T* -40C TO +85C 6 SOT23-6 age and operates over the extended (-40C to +85C) temperature range. *Insert the desired letter from the Selector Guide into the blank to complete the part number. There is a 2500 piece minimum Applications order increment requirement on the SOT package and these devices are available in tape-and-reel only. Telecommunications Devices are available in both leaded and lead-free packaging. High-End Printers Specify lead-free by replacing -T with +T when ordering. Desktop and Network Computers Data Storage Equipment Typical Operating Circuit Networking Equipment Industrial Equipment Set-Top Boxes MAX6339 IN1 SUPPLIES IN2 TO BE P RESET MONITORED IN3 IN4 GND Pin Configuration appears at end of data sheet. 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.Quad Voltage P Supervisory Circuit in SOT Package ABSOLUTE MAXIMUM RATINGS Terminal Voltage (with respect to GND) Operating Temperature Range ...........................-40C to +85C Input Voltages (IN ) (except -5V)............................-0.3V to +6V Storage Temperature Range .............................-65C to +150C RESET.......................................................................-0.3V to +6V Junction Temperature......................................................+150C Input Voltage (-5V Input) ..........................................-6V to +0.3V Lead Temperature (soldering, 10s) .................................+300C Continuous RESET Current.................................................20mA Continuous Power Dissipation (T = +70C) A 6-pin SOT23 (derate 8.7mW/C above +70C).........695.7mW 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 = +1V to +5.5V, T = -40C to +85C, unless otherwise noted. Typical values are at V = +3.0V to +3.3V, T = +25C, unless IN2 A IN2 A otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage Range V 1.0 5.5 V IN2 (Notes 2, 3) V = input threshold voltage (input threshold IN 25 40 voltage of 1.8V, 2.5V, 5V) V = input threshold voltage (input threshold IN2 55 115 voltage of 3.0V, 3.3V) (Note 4) Input Current A I V = 0 to V IN IN IN2 -0.1 +0.1 (input threshold voltage = +1.23V) V = 1.5V (MAX6339 K/L only) 0.4 1.5 IN1 V = -5V (input threshold voltage = -5V) -15 -20 IN +5V (-5%) threshold 4.50 4.63 4.75 +5V (-10%) threshold 4.25 4.38 4.50 +3.3V (-5%) threshold 3.00 3.08 3.15 +3.3V (-10%) threshold 2.85 2.93 3.00 V IN decreasing +3.0V (-5%) threshold 2.70 2.78 2.85 Reset V V TH Threshold Voltage +3.0V (-10%) threshold 2.55 2.63 2.70 +2.5V (-10% ) threshold 2.13 2.19 2.25 +1.8V (-10%) threshold 1.53 1.58 1.62 -5V (+5%) threshold -4.75 -4.63 -4.50 V IN increasing -5V (+10%) threshold -4.50 -4.38 -4.25 Adjustable Threshold V V decreasing 1.20 1.23 1.26 V TH IN Threshold Voltage 60 ppm/C Temperature Coefficient Threshold Hysteresis V 0.3 % HYST V = V to (V - 50mV) (all inputs except 5V) IN TH TH Reset Delay t 20 s RD or V = V to (V + 50mV) (-5V input only) IN TH TH Reset Active Timeout t 140 200 280 ms RP Period 2 MAX6339