Digital thermal supervisor MICROCHIP MIC284-1BMM-TR with interrupt masking and failsafe diode fault response
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Product Description
Product Overview
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, open-drain interrupt and overtemperature output pins for fan control or hardware shutdown, interrupt masking, low power shutdown mode, and failsafe response to diode faults. Its superior performance, low power consumption, and small size make it suitable for demanding thermal management applications in desktop, server, and notebook computers, 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 |
| Absolute Maximum Ratings | ||||||
| Power Supply Voltage | VDD | +6.0 | V | |||
| Voltage on Any Pin | 0.3 | VDD + 0.3 | V | |||
| Current into Any Pin | 10 | mA | ||||
| Power Dissipation | 30 | mW | TA = +125C | |||
| ESD Rating (HBM) | TBD | kV | Note 1 | |||
| ESD Rating (MM) | TBD | V | Note 1 | |||
| Operating Ratings | ||||||
| Power Supply Voltage | VDD | +2.7 | +5.5 | V | ||
| Electrical Characteristics | ||||||
| Supply Current | IDD | 350 | 750 | A | /INT, open, A0 = VDD or GND, CLK = DATA = high, normal mode | |
| Supply Current | IDD | 3 | A | /INT, /CRIT open, A0 = VDD or GND, shutdown mode, CLK = 100 kHz | ||
| Supply Current | IDD | 1 | 10 | A | /INT, /CRIT open, A0 = VDD or GND, shutdown mode, CLK = DATA = high | |
| Power-on Reset Time | tPOR | 200 | s | VDD > VPOR, Note 2 | ||
| Power-on Reset Voltage | VPOR | 2.0 | 2.7 | V | All registers reset to default values; A/D conversions initiated | |
| Power-on Reset Hysteresis Voltage | VHYST | 250 | mV | |||
| Local Temperature Accuracy | 1 | 2 | C | 0C TA +100C, /INT and /CRIT open, 3V VDD 3.6V, Note 3, Note 4 | ||
| Local Temperature Accuracy | 2 | 3 | C | 55C TA +125C, /INT and /CRIT open, 3V VDD 3.6V, Note 3, Note 4 | ||
| Remote Temperature Accuracy | 1 | 3 | C | 0C TD +100C, /INT and /CRIT open, 3V VDD 3.6V, 0C TA +85C, Note 3, Note 4, Note 5 | ||
| Remote Temperature Accuracy | 2 | 5 | C | 55C TD +125C, /INT and /CRIT open, 3V VDD 3.6V, 0C TA +85C, Note 3, Note 4, Note 5 | ||
| 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, Note 2 | |
| 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 | ||
| Address Input (A0) Input Capacitance | CIN | 10 | pF | |||
| Address Input (A0) Input Current | ILEAK | 0.01 | 1 | A | ||
| Serial Data I/O Pin (DATA) Low Output Voltage | VOL | 0.4 | V | IOL = 3 mA, Note 6 | ||
| Serial Data I/O Pin (DATA) Low Output Voltage | VOL | 0.8 | V | IOL = 6 mA | ||
| Serial Data I/O Pin (DATA) Low Input Voltage | VIL | 0.3VDD | V | 2.7V VDD 5.5V | ||
| Serial Data I/O Pin (DATA) High Input Voltage | VIH | 0.7VDD | V | 2.7V VDD 5.5V | ||
| Serial Data I/O Pin (DATA) Input Capacitance | CIN | 10 | pF | |||
| Serial Data I/O Pin (DATA) Input Current | ILEAK | 0.01 | 1 | A | ||
| 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 | ||
| Serial Clock Input (CLK) Input Capacitance | CIN | 10 | pF | |||
| Serial Clock Input (CLK) Input Current | ILEAK | 0.01 | 1 | A | ||
| Status Output (/INT) Low Output Voltage | VOL | 0.4 | V | IOL = 3 mA, Note 6 | ||
| Status Output (/INT) Low Output Voltage | VOL | 0.8 | V | IOL = 6 mA | ||
| Interrupt Propagation Delay | tINT | tCONV + 1 | s | From TEMP > T_SET or TEMPx | ||
| Interrupt Reset Propagation Delay | tnINT | 1 | s | From any register read to /INT > VOH, FQ = 00, RPULLUP = 10 k, Note 2 | ||
| 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 |
| Overtemperature Output (/CRIT) Low Output Voltage | VOL | 0.4 | V | IOL = 3 mA, Note 6 | ||
| Overtemperature Output (/CRIT) Low Output Voltage | VOL | 0.8 | V | IOL = 6 mA | ||
| /CRIT Propagation Delay | tCRIT | tCONV + 1 | s | From TEMPx > T_SET or TEMPx | ||
| /CRIT Reset Propagation Delay | tnCRIT | 1 | s | From any register read to /INT > VOH, FQ = 00, RPULLUP = 10 k, Note 2 | ||
| Default CRIT1 Value | CRIT1 | 97 | 97 | 97 | C | tPOR after VDD > VPOR |
| Default nCRIT1 Value | nCRIT1 | 92 | 92 | 92 | C | tPOR after VDD > VPOR |
| Serial Interface Timing | ||||||
| CLK (Clock) Period | t1 | 2.5 | s | Note 2 | ||
| 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 | |||
| Data-High Hold Time after CLK High | t5 | 100 | ns | Start Condition | ||
| Data-High Hold Time after CLK High | t5 | 100 | ns | Stop Condition | ||
| Temperature Specifications | ||||||
| Storage Temperature | TS | 65 | +150 | C | ||
| Ambient Temperature Range | TA | 55 | +125 | C | ||
| Lead Temperature Soldering (Vapor Phase, 60 sec.) | +220 5 | C | ||||
| Lead Temperature Soldering (Infrared, 15 sec.) | +235 5 | C | ||||
| Package Thermal Resistances | ||||||
| SOIC-8 | JA | 152 | C/W | |||
| MSOP-8 | JA | 206 | C/W | |||
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