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MC1066 Scheda tecnica(PDF) 1 Page - ON Semiconductor |
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MC1066 Scheda tecnica(HTML) 1 Page - ON Semiconductor |
1 / 16 page © Semiconductor Components Industries, LLC, 1999 February, 2000 – Rev. 0 1 Publication Order Number: MC1066/D MC1066 ACPI-Compliant SMBus Temperature Sensor with Internal and External Diode Input The MC1066 is a serially programmable temperature sensor optimized for monitoring modern high performance CPUs with on–board integrated temperature sensing diodes. Temperature data is converted from the CPU’s diode outputs and made available as an 8–bit digital word. Communication with the MC1066 is accomplished via the standard System Management Bus (SMBus) commonly used in modern computer systems. This permits reading the current internal/external temperature, programming the threshold setpoints, and configuring the device. Additionally, an interrupt is generated on the ALERT/COMP pin when temperature moves outside the preset threshold windows in either direction. A separate CRITICAL setpoint is provided through external hardwiring for “fail safe” operation per ACPI guidelines. A Standby command may be sent via the SMBus or by signaling the STBY input pin to activate the low–power Standby mode. Registers can be accessed while in Standby mode. Address selection inputs allow up to nine MC1066s to share the same 2–wire SMBus for multi–zone monitoring. All registers can be read by the host, and both polled and interrupt driven systems are easily accommodated. Small size, low installed cost, and ease of use make the MC1066 an ideal choice for implementing sophisticated system management schemes, such as ACPI. Features • Specifically ACPI–Compliant • Backward Compliant to Older APM Systems • Includes Internal and External Sensing Capability • Outputs Temperature As 8–Bit Digital Word • Solid State Temperature Sensing; 1°C Resolution • 3.0 — 5.5V Operating Range • Independent Internal and External Threshold Set–Points With ALERT/COMP Interrupt Output • SMBus 2–Wire Serial Interface • Optional CRITICAL Set–Point for Full ACPI Compliant Implementation • Up To Nine MC1066s May Share the Same Bus • Low Standby Power Mode • Low Power: 70 µA (max) Operating, 10 µA (max) Standby Mode • 16–Pin Plastic QSOP Package Typical Applications • Thermal Protection For Intel “Deschutes” Pentium™ II and Other High Performance CPUs with Integrated On–Board Diode - No Sensor Mounting Problems! • Accurate Temperature Sensing From Any Silicon Junction Diode • Thermal Management in Electronic Systems: Computers, Network Equipment, Power Supplies 16–Pin QSOP DB SUFFIX CASE TBD PRELIMINARY INFORMATION http://onsemi.com PIN CONFIGURATION (Top View) Device Package Shipping ORDERING INFORMATION MC1066DBR2 16–Pin QSOP 2500 Tape/Reel MC1066 1 2 3 4 16 15 14 13 CRIT1 VDD D+ D– NC STBY SCL INT_SEL 5 6 7 8 12 11 10 9 CRIT0 ADD1 GND GND SDA ALERT/COMP ADD0 OS |
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