MAX6575L/H SOT Temperature Sensor with Multidrop Single-Wire Digital Interface General Description Features The MAX6575L/H is a low-cost, low-current temperature Simple Single-Wire Interface to P or C sensor with a single-wire digital interface. It features Multidrop up to Eight Sensors on One Wire accuracy of 3C at +25C, 4.5C at +85C, and 5C 0.8C Accuracy at +25C (3C max) at +125C. The MAX6575L/H is a monostable, externally triggered temperature sensor that allows a microproces Operates from +2.7V to +5.5V Supply Voltage sor (P) to interface with up to eight temperature sensors Low 150A (typ) Supply Current using a single control line. Temperatures are sensed by Standard Operating Temperature Range measuring the time delay between the falling edge of the -40C to +125C external triggering pulse and the falling edge of the sub- Small 6-Pin SOT23 Package sequent pulse delays reported from the devices. Different sensors on the same I/O line use different timeout multi- pliers to avoid overlapping signals. Ordering Information The MAX6575L/H features eight different timeout multipli- PIN- SOT ers these are selectable by using the two time-select pins PART TEMP.RANGE PACKAGE TOP MARK on each device and choosing the L or H version. The MAX6575LZUT -40C to +125C 6 SOT23 AABG L version provides four delay ranges less than 50ms. The H version provides four delay ranges greater than MAX6575HZUT -40C to +125C 6 SOT23 AABH 50ms. The MAX6575L/H is available in a space-saving 6-pin SOT23 package. Selector Guide Applications TIMEOUT MULTIPLIERS Critical P and C Temperature Monitoring PART (s/K) Portable Battery-Powered Equipment Cell Phones MAX6575L 5, 20, 40, 80 Battery Packs MAX6575H 160, 320, 480, 640 Hard Drives/Tape Drives Networking and Telecom Equipment Pin Configuration appears at end of data sheet. Medical Equipment Typical Operating Circuit +2.7V TO +5.5V V CC 0.1F 0.1F V V DD DD 0.1F MAX6575L MAX6575H TS1 TS1 CHIP 1 CHIP 8 V CC 10k TS0 TS0 GND GND I/O I/O P I/O GND 19-1485 Rev 1 11/14MAX6575L/H SOT Temperature Sensor with Multidrop Single-Wire Digital Interface Absolute Maximum Ratings Terminal Voltage (with respect to GND) Continuous Power Dissipation (T = +70C) A V ......................................................................-0.3V to +6V 6-Pin SOT23 (derate 7.10mW/C above +70C).........571mW DD TS1, TS0...............................................-0.3V to (V + 0.3V) Operating Temperature Range .........................-40C to +125C DD I/O.........................................................................-0.3V to +6V Storage Temperature Range .............................-65C to +150C Input/Output Current, All Pins...........................................20mA Lead Temperature (soldering, 10s) ..................................+300C 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 = +2.7V to +5.5V, T = -40C to +125C, unless otherwise noted. Typical values are specified at T = +25C and V = +5V, DD A A DD unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS V V Range 2.7 5.5 V DD DD T = -40C to +85C 150 250 A I Supply Current V = 5.5V A DD DD T = -40C to +125C 400 A T = -20C -7.5 1.1 +7.5 A T = 0C -5.5 0.9 +5.5 A Temperature Sensor Error T = +25C -3.0 0.8 +3.0 C A (Note 1) T = +85C -4.5 0.5 +4.5 A T = +125C -5.0 0.5 +5.0 A t V = GND, V = GND 5T D1 TS1 TS0 MAX6575L, t V = GND, V = V 20T D2 TS1 TS0 DD T (temp) in K, t V V = , V = GND 40T D3 TS1 DD TS0 Figure 1 t V = V , V = V 80T D4 TS1 DD TS0 DD Output Pulse Delay s t V = GND, V = GND 160T D5 TS1 TS0 MAX6575H, t V = GND, V = V 320T D6 TS1 TS0 DD T (temp) in K, t V V = , V = GND 480T D7 TS1 DD TS0 Figure 1 t V = V , = V V 640T D8 TS1 DD TS0 DD t Output Pulse Low Time Figure 1 5T s L1-8 t Reset Pulse Width (Note 2) Figure 1 4.6 16.0 ms RESET t Setup Time Figure 1 10 s SETUP t Start Pulse (Note 3) Figure 1, T = +25C 2.5 s START A Delay Time from Trigger to t Figure 1 520 ms READY Ready (Note 4) Glitch Immunity on I/O Input 500 ns V 0.8 IL Time-Select Pin Logic Levels V V 2.3 IH V > 4.5V, I = 3.2mA 0.4 DD SINK V I/O Output Voltage Low V OL V > 2.7V, I = 1.2mA 0.3 DD SINK V I/O Input Voltage Low 0.8 V IL V I/O Input Voltage High 2.3 V IH Note 1: See Temperature Accuracy histograms in Typical Operating Characteristics. Note 2: Guaranteed by design. Not production tested. Note 3: Limit maximum start pulse at 1ms to avoid timing overlap. Note 4: If no reset pulse is applied. Maxim Integrated 2 www.maximintegrated.com