PDF NCT80 Data sheet ( Hoja de datos )

Número de pieza	NCT80
Descripción	Hardware Monitor
Fabricantes	ON Semiconductor
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No Preview Available ! NCT80 Hardware Monitor with I2C Serial Interface The NCT80 is a two−wire serially programmable hardware monitor. It can monitor its on chip temperature via its local sensor, 7 analog inputs and measure the speed of two fans. Each of the measured values are compared with programmable limits and if any channel is outside the programmed limit an interrupt is generated via the INT output pin. It also has a chassis intrusion detection input pin which is latched on an intrusion event. Communication with the NCT80 is accomplished via the I2C interface which is compatible with industry standard protocols. Through this interface the NCT80s internal registers may be accessed. These registers allow the user to read the current temperature, fan speed and voltages, change the configuration settings and adjust each channels limits. The NCT80 is available in a 24−lead TSSOP package and operates over a wide supply range of 2.8 to 5.75 V. This makes the NCT80 ideal for a wide variety of applications ranging from computers to servers and test equipment. Features • On−chipTemperature Sensor • 2 Fan Speed Monitoring Inputs • 7 Analog Inputs for Voltage Monitoring • Chassis Intrusion Detection • Overtemperature Output • Limit Comparison of Monitored Channels • 3 Address Selection Pins • Power Saving Shutdown Mode • I2C Compliant Interface • These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant http://onsemi.com TSSOP−24 DB SUFFIX CASE 948H XXXXX XXXXG ALYW XXXX A L Y W G = Specific Device Code = Assembly Location = Wafer Lot = Year = Work Week = Pb−Free Package PIN CONNECTIONS 1 INT_IN A2 SDA A1 SCL A0/NTEST_OUT TACH1 AIN0 TACH2 AIN1 BTI AIN2 CI AIN3 GND AIN4 VINDTD AIN5 AIN6 GPO AGND RST_IN/ RST_OUT/ NTEST_IN (Top View) THERM ORDERING INFORMATION Device Package Shipping† NCT80DBR2G TSSOP−24 (Pb−Free) Tape & Reel †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D. © Semiconductor Components Industries, LLC, 2012 July, 2012 − Rev. 0 1 Publication Order Number: NCT80/D 1 page NCT80 TYPICAL CHARACTERISTICS 600 600 500 500 400 400 300 300 200 200 100 100 0 2.8 3.3 3.8 4.3 4.8 5.3 VDD (V) Figure 2. Supply Current vs. VDD 5.8 0 2.8 3.3 3.8 4.3 4.8 5.3 VDD (V) Figure 3. Supply Current vs. VDD (Voltage Conversion) 5.8 600 600 500 500 400 400 300 300 200 200 100 100 0 2.8 3.3 3.8 4.3 4.8 5.3 VDD (V) Figure 4. Supply Current vs. VDD (Temperature Conversion) 5.8 0 2.8 3.3 3.8 4.3 4.8 5.3 VDD (V) Figure 5. Shutdown Current vs. VDD 5.8 Figure 6. TUE vs. Code 1.0 0.8 0.6 0.4 0.2 0 −0.2 −0.4 −0.6 −0.8 −1.0 18 29 3 10 4 11 5 12 6 13 7 14 15 22 16 23 17 24 18 25 19 26 20 28 21 29 2.8 3.0 3.3 3.6 4.125 4.5 5.0 5.75 VDD (V) Figure 7. Local Temp Error vs. VDD http://onsemi.com 5 5 Page Table 9. REGISTER MAP Register Name CONFIGURATIONREGISTER STATUSREGISTER1 STATUSREGISTER2 MASKREGISTER1 MASKREGISTER2 FAN_DIVISOR_OUTPUT_PIN_CONFIG OS_CONFIG_TEMP_RESOLUTION CONVERSION_RATE CHANNEL_SELECT_REGISTER CONVERSION_RATE IN0_READING IN1_READING IN2_READING IN3_READING IN4_READING IN5_READING IN6_READING TEMP_READING TACH1_READING TACH2_READING IN0_HIGH_LIMIT IN0_LOW_LIMIT IN1_HIGH_LIMIT IN1_LOW_LIMIT IN2_HIGH_LIMIT IN2_LOW_LIMIT IN3_HIGH_LIMIT IN3_LOW_LIMIT IN4_HIGH_LIMIT IN4_LOW_LIMIT IN5_HIGH_LIMIT IN5_LOW_LIMIT IN6_HIGH_LIMIT IN6_LOW_LIMIT HOT_TEMP_HIGH_LIMIT HOT_TEMP_HYSTERESIS_LIMIT OS_TEMP_HIGH_LIMIT OS_TEMP_HYSTERESIS_LIMIT TACH1_COUNT_LIMIT TACH2_COUNT_LIMIT MANUFACTURERID NCT80 Type RW RO RO RW RW RW RW RW RW RW RO RO RO RO RO RO RO RO RO RO RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW RO http://onsemi.com 11 Reset Value 0x08 0x00 0x00 0x00 0x00 0x14 0x01 0x00 0x00 0x00 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x1A Address Offset 0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x20 0x21 0x22 0x23 0x24 0x25 0x26 0x27 0x28 0x29 0x2A 0x2B 0x2C 0x2D 0x2E 0x2F 0x30 0x31 0x32 0x33 0x34 0x35 0x36 0x37 0x38 0x39 0x3A 0x3B 0x3C 0x3D 0x3E 11 Page

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