Overview
●The NE1617A is an accurate two-channel temperature monitor. It measures the temperature of itself and the temperature of a remote sensor. The remote sensor is a diode connected transistor. This can be in the form of either a discrete NPN/PNP, such as the 2N3904/2N3906, or a diode connected PNP built into another die, such as is done on some Intel microprocessors.
●The temperature of both the remote and local sensors is stored in a register that can be read via a 2-wire SMBus. The temperatures are updated at a rate that is programmable via the SMBus (the average supply current is dependent upon the update rate — the faster the rate, the higher the current).
●In addition to the normal operation, which is to update the temperature at the programmed rate, there is a one-shot mode that will force a temperature update.
●There is also an alarm that senses either an overtemperature or undertemperature condition. The trip points for this alarm are also programmable.
●The device can have one of nine addresses (determined by two address pins), so there can be up to nine of the NE1617A on the SMBus.
●It can also be put in standby mode (in order to save power). This can be done either with software (over the SMBus) or with hardware (using the STBY pin).
●MoreLess
●## Features
● Replacement for Maxim MAX1617 and Analog Devices ADM1021
● Monitors local and remote temperature
● Local (on-chip) sensor accuracy:
● ±2 °C at 60 °C to 100 °C
● ±3 °C at -40 °C to 125 °C
● Remote sensor accuracy:
● ±3 °C at 60 °C to 100 °C
● ±5 °C at -40 °C to 125 °C
● No calibration required
● Programmable overtemperature/undertemperature alarm
● SMBus 2-wire serial interface up to 100 kHz
● 3 V to 5.5 V supply range; 5.5 V tolerant
● 70 µA supply current in operating mode
● 3 µA (typical) supply current in standby mode
● ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101
● Latch-up testing is done to JEDEC standard JESD78, which exceeds 100 mA
● Small 16-lead SSOP (QSOP) package
●## Target Applications
● Desktop computers
● Notebook computers
● Smart battery packs
● Industrial controllers
● Telecommunications equipment
●## Features
