SYSTEM MONITOR IN 10-PIN µMAX PROVIDES LOW-COST TEMPERATURE AND VOLTAGE FAULT DETECTION
SUNNYVALE, CA-March 2, 2001-Maxim Integrated Products introduces the MAX6652 system monitor. Housed in a tiny 10-pin µMAX package, the MAX6652 monitors system temperature and four external voltages, generating an interrupt when a voltage or temperature measurement falls outside of a programmable limit threshold.
The MAX6652 system supervisor has an on-board digital temperature sensor that measures the local temperature with 2°C accuracy (max) at +25°C, 3°C accuracy (max) over a temperature range of –20°C to +80°C, and 5°C accuracy (max) over the -40°C to +125°C range.
In addition, the MAX6652 monitors four external voltages, +12V, +3.3V, +2.5V, and its own supply voltage, with an accuracy of 1%.
When a temperature measurement exceeds the user-programmed temperature threshold, or when an input voltage falls outside the programmed limits, the MAX6652 generates a latched interrupt output at its ALERT-bar pin. There are three modes available for this interrupt: default, one-time interrupt, and comparator mode. If desired, interrupts can be masked out. The MAX6652 measures temperature and voltage continuously, even after the ALERT-bar pin has been set. Temperature and voltage data can be read at any time.
Communication with the device is carried out via a 2-wire serial interface accepting standard System Management Bus (SMBus) protocol. This interface is used to program the configuration of the MAX6652, including the temperature alarm threshold and under/overvoltage alarm thresholds. The MAX6652 operates with a supply voltage between +2.7V and +5.5V and has an active supply current of just 200µA and standby current of 1µA. Prices start from $1.24 for the MAX6652 (1000-up, FOB USA).
|
