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19-1485; Rev 0; 4/99
SOT Temperature Sensor with Multidrop Single-Wire Digital Interface
General Description
The MAX6575L/H is a low-cost, low-current temperature sensor with a single-wire digital interface. It features accuracy of ±3°C at +25°C, ±4.5°C at +85°C, and ±5°C at +125°C. The MAX6575L/H is a monostable, externally triggered temperature sensor that allows a microprocessor (P) to interface with up to eight temperature sensors using a single control line. Temperatures are sensed by measuring the time delay between the falling edge of the external triggering pulse and the falling edge of the subsequent pulse delays reported from the devices. Different sensors on the same I/O line use different timeout multipliers to avoid overlapping signals. The MAX6575L/H features eight different timeout multipliers; these are selectable by using the two time-select pins on each device and choosing the "L" or "H" version. The "L" version provides four delay ranges less than 50ms. The "H" version provides four delay ranges greater than 50ms. The MAX6575L/H is available in a space-saving 6-pin SOT23 package.
Features
o Simple Single-Wire Interface to P or C o Multidrop up to Eight Sensors on One Wire o ±0.8°C Accuracy at +25°C (±3°C max) o Operates from +2.7V to +5.5V Supply Voltage o Low 150A (typ) Supply Current o Standard Operating Temperature Range: -40°C to +125°C o Small 6-Pin SOT23 Package
MAX6575L/H
Ordering Information
PART MAX6575LZUT MAX6575HZUT TEMP. RANGE -40°C to +125°C -40°C to +125°C SOT PINPACKAGE TOP MARK 6 SOT23 6 SOT23 AABG AABH
Applications
Critical P and C Temperature Monitoring Portable Battery-Powered Equipment Cell Phones Battery Packs Hard Drives/Tape Drives Networking and Telecom Equipment Medical Equipment Automotive
PART MAX6575L MAX6575H
Selector Guide
TIMEOUT MULTIPLIERS (s/°K) 5, 20, 40, 80 160, 320, 480, 640

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