MIC284 Two-Zone Thermal Supervisor
The MIC284 is a versatile digital thermal supervisor designed for CPU thermal supervision in computing applications. It measures both local and remote temperatures using an 8-bit Sigma-Delta ADC and communicates via a 2-wire SMBus-compatible interface. Key features include programmable thermostat settings, an open-drain interrupt output pin for alarms or thermostatic control, and an open-drain overtemperature output pin for fan control or hardware shutdown. The device offers low power consumption and failsafe response to diode faults, making it suitable for desktop, server, and notebook computers, as well as power supplies, test and measurement equipment, wireless systems, and networking hardware.
Product Attributes
- Brand: Microchip Technology Inc.
- Origin: Not specified
- Material: Not specified
- Color: Not specified
- Certifications: Not specified
Technical Specifications
| Parameter | Symbol | Min. | Typ. | Max. | Units | Conditions |
| Power Supply Voltage | VDD | 2.7 | 5.5 | V | Operating Range | |
| Supply Current (Normal Mode) | IDD | 350 | 750 | A | /INT, open, A0 = VDD or GND, CLK = DATA = high | |
| Supply Current (Shutdown Mode) | IDD | 3 | A | /INT, /CRIT open, A0 = VDD or GND, CLK = 100 kHz | ||
| Power-on Reset Time | tPOR | 200 | s | VDD > VPOR | ||
| Power-on Reset Voltage | VPOR | 2.0 | 2.7 | V | All registers reset to default values; A/D conversions initiated | |
| Local Temperature Accuracy | 1 | 2 | C | 0C TA +100C, /INT and /CRIT open, 3V VDD 3.6V | ||
| Remote Temperature Accuracy | 1 | 3 | C | 0C TD +100C, /INT and /CRIT open, 3V VDD 3.6V, 0C TA +85C | ||
| Local Zone Conversion Time | tCONV0 | 50 | 80 | ms | Note 2 | |
| Remote Zone Conversion Time | tCONV1 | 100 | 160 | ms | Note 2 | |
| Current into External Diode | IF | 224 | 400 | A | T1 forced to 1.5V, high level | |
| Address Input (A0) Low Input Voltage | VIL | 0.6 | V | 2.7V VDD 5.5V | ||
| Address Input (A0) High Input Voltage | VIH | 2.0 | V | 2.7V VDD 5.5V | ||
| Serial Data I/O Pin (DATA) Low Output Voltage | VOL | 0.4 | V | IOL = 3 mA | ||
| Serial Clock Input (CLK) Low Input Voltage | VIL | 0.3VDD | V | 2.7V VDD 5.5V | ||
| Serial Clock Input (CLK) High Input Voltage | VIH | 0.7VDD | V | 2.7V VDD 5.5V | ||
| Status Output (/INT) Low Output Voltage | VOL | 0.4 | V | IOL = 3 mA | ||
| Overtemperature Output (/CRIT) Low Output Voltage | VOL | 0.4 | V | IOL = 3 mA | ||
| Default T_SET0 Value | T_SET0 | 81 | 81 | 81 | C | tPOR after VDD > VPOR |
| Default T_HYST0 Value | T_HYST0 | 76 | 76 | 76 | C | tPOR after VDD > VPOR |
| Default T_SET1 Value | T_SET1 | 97 | 97 | 97 | C | tPOR after VDD > VPOR |
| Default T_HYST1 Value | T_HYST1 | 92 | 92 | 92 | C | tPOR after VDD > VPOR |
| Default CRIT1 Value | CRIT1 | 97 | 97 | 97 | C | tPOR after VDD > VPOR |
| Default nCRIT1 Value | nCRIT1 | 92 | 92 | 92 | C | tPOR after VDD > VPOR |
| Clock Period | t1 | 2.5 | s | |||
| Data-In Set-Up Time to CLK High | t2 | 100 | ns | |||
| Data-Out Stable after CLK Low | t3 | 0 | ns | |||
| Data-Low Set-Up Time to CLK Low | t4 | 100 | ns | Start Condition | ||
| Data-High Hold Time after CLK High | t5 | 100 | ns | Stop Condition | ||
| Storage Temperature | TS | 65 | +150 | C | ||
| Ambient Temperature Range | TA | 55 | +125 | C | ||
| Package Thermal Resistance (SOIC-8) | JA | 152 | C/W | |||
| Package Thermal Resistance (MSOP-8) | JA | 206 | C/W |
2410311238_MICROCHIP-MIC284-3BMM-TR_C19511850.pdf
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