The MAX1619 is a precise digital thermometer that reports the temperature of both a remote sensor and its own package. The remote sensor is a diode-connected transistor-typically a low-cost, easily mounted 2N3904 NPN type-that replaces conventional thermistors or thermocouples. Remote accuracy is ±3°C for multiple transistor manufacturers, with no calibration needed. The remote channel can also measure the die temperature of other ICs, such as microprocessors, that contain an on-chip, diode-connected transistor. The 2-wire serial interface accepts standard System Management Bus (SMBus™) Write Byte, Read Byte, Send Byte, and Receive Byte commands to program the alarm thresholds and to read temperature data. The data format is 7 bits plus sign, with each bit corresponding to 1°C, in two's complement format. Measurements can be done automatically and autonomously, with the conversion rate programmed by the user or programmed to operate in a single-shot mode. The adjustable rate allows the user to control the supply-current drain. The MAX1619 is nearly identical to the popular MAX1617A, with the additional feature of an overtemperature alarm output (active-low OVERT) that responds to the remote temperature; this is optimal for fan control. Applications * Central Office Telecom Equipment * Computers: Desktop, Workstation, Server * Industrial Controls * LAN Servers * Multichip Modules * Smart Battery Packs/Chargers * Test and Measurement Equipment * Two Channels Measure Both Remote and Local Temperatures * No Calibration Required * SMBus 2-Wire Serial Interface * Programmable Under/Overtemperature Alarms * Active-Low OVERT Output for Fan Control * Supports SMBus Alert Response * Supports Manufacturer and Device ID Codes * Accuracy * ±2°C (+60°C to +100°C, local) * ±3°C (-40°C to +125°C, local) * ±3°C (+60°C to +100°C, remote) * 3µA (typ) Standby Supply Current * 70µA (max) Supply Current in Auto-Convert Mode * +3V to +5.5V Supply Range * Write-Once Protection * Small 16-Pin QSOP Package https://elecena.pl/product/22317196/remote-local-temperature-sensor-with-dual-alarm-outputs-and-smbus-serial-interface 2022-12-27 https://elecena.pl/product/22317196/remote-local-temperature-sensor-with-dual-alarm-outputs-and-smbus-serial-interface 2025-01-18