NCT214MT3R2G ON Semiconductor

NCT214 1 C Temperature Monitor with Series Resistance Cancellation The NCT214 is a dual-channel digital thermometer and undertemperature/overtemperature alarm, intended for use in PCs and NCT214 CONVERSION RATE ON-CHIP ADDRESS POINTER REGISTER TEMPERATURE REGISTER SENSOR LOCAL TEMPERATURE LOCAL TEMPERATURE LOW-LIMIT REGISTER VALUE REGISTER LOCAL TEMPERATURE D+ 3 HIGH-LIMIT REGISTER ANALOG A-TO-D MUX CONVERTER D REMOTE TEMPERATURE 4 LOW-LIMIT REGISTER RUN/STANDBY BUSY REMOTE TEMPERATURE REMOTE TEMPERATURE HIGH-LIMIT REGISTER VALUE REGISTER LOCAL THERM LIMIT REGISTERS REMOTE OFFSET EXTERNAL THERM REGISTER LIMIT REGISTERS CONFIGURATION REGISTERS EXTERNAL DIODE OPEN-CIRCUIT INTERRUPT STATUS REGISTER MASKING NCT214 2 SMBus/I C INTERFACE 2 6 1 10 8 9 5 7 V GND ADD1 ADD0 SDATA SCLK THERM ALERT/THERM2 DD Figure 1. Functional Block Diagram Table 1. PIN ASSIGNMENT Pin No. Mnemonic Description 1 ADD1 Address 1 pin. Tri-state input to set the SMBus address. 2 V Positive Supply, 3.0 V to 3.6 V. DD 3 D+ Positive Connection to Remote Temperature Sensor. 4 D Negative Connection to Remote Temperature Sensor. 5 THERM Active-low open-drain overtemperature output pin needs pullup resistor. 6 GND Ground 7 ALERT/THERM2 Open-drain Logic Output used as interrupt or SMBus ALERT. This can also be configured as a second THERM output. Requires pullup resistor. 8 SDATA Logic Input/Output, SMBus Serial Data. Open-drain Output. Requires pullup resistor. SCLK Logic Input, SMBus Serial Clock. Requires pullup resistor. 9 10 ADD0 Address 0 pin. Tri-state input to set the SMBus address.