The MAX1668/MAX1805/MAX1989 are precise multichannel digital thermometers that report the temperature of all remote sensors and their own packages. The remote sensors are diode-connected transistorstypically low-cost, easily mounted 2N3904 NPN typesthat replace conventional thermistors or thermocouples. Remote accuracy is ±3°C for multiple transistor manufacturers, with no calibration needed. The remote channels 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. The MAX1668/MAX1805/MAX1989 are available in small, 16-pin QSOP surface-mount packages. The MAX1989 is also available in a 16-pin TSSOP. Applications * Central Office Telecom Equipment * Desktop/Notebook Computers * Industrial Controls * LAN Servers * Multichip Modules * Test and Measurement Equipment * Multichannel * 4 Remote, 1 Local (MAX1668/MAX1989) * 2 Remote, 1 Local (MAX1805) * No Calibration Required * SMBus 2-Wire Serial Interface * Programmable Under/Overtemperature Alarms * Supports SMBus Alert Response * 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 * 700µA (max) Supply Current * Small, 16-Pin QSOP/TSSOP Packages https://elecena.pl/product/22320250/multichannel-remote-local-temperature-sensors 2022-12-27 https://elecena.pl/product/22320250/multichannel-remote-local-temperature-sensors 2025-01-18