LM76CNMX-3 National Semiconductor, LM76CNMX-3 Datasheet
LM76CNMX-3
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LM76CNMX-3 Summary of contents
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... ® registered trademark of Philips Corporation. © 2000 National Semiconductor Corporation DS101015 Features n Window comparison simplifies design of ACPI compatible temperature monitoring and control. n Serial Bus interface ...
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... Simplified Block Diagram Connection Diagram Ordering Information Order Number Supply Voltage LM76CHM-5 LM76CHMX-5 LM76CNM-3 LM76CNMX-3 Pin Description Label Pin # SDA 1 Serial Bi-Directional Data Line, Open Drain Output, CMOS Logic Level SCL 2 Serial Bus Clock Input, CMOS Logic Level T_CRIT_A 3 Critical Temperature Alarm, Open Drain Output ...
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Pin Description (Continued) FIGURE 1. Typical Application 3 DS101015-3 www.national.com ...
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Absolute Maximum Ratings Supply Voltage Voltage at any Pin −0.3V to (+V Input Current at any Pin Package Input Current (Note 2) T_CRIT_A and INT Output Sink Current T_CRIT_A and INT Output Voltage Storage Temperature Temperature-to-Digital Converter Characteristics Unless otherwise ...
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Logic Electrical Characteristics DIGITAL DC CHARACTERISTICS Unless otherwise noted, these specifications apply for for +V ± = +5.0 Vdc LM76CNM-3 and for +V 10% for the LM76CHM-5. . Boldface limits apply for +25˚C, unless otherwise ...
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Logic Electrical Characteristics Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not apply when operating the device beyond its rated operating conditions. Note 2: When the input ...
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Functional Description “True”: Temperature above T_CRIT is “true” for HIGH those respective bits. A “true” for T is temperature below LOW T . LOW “False”: Assuming temperature has previously crossed above T or T_CRIT, then the ...
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Functional Description Note: Event Interrupt mode is drawn as if the user is reading the part. If the user doesn’t read, the outputs would go low and stay that way until the LM76 is read. 1.4 TEMPERATURE DATA FORMAT ...
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Functional Description and T_CRIT_A outputs. The fault queue is enabled by set- ting bit 4 of the Configuration Register high (see Section 1.11). 1.8 INTERNAL REGISTER STRUCTURE There are four data registers in the LM76, selected by the Pointer ...
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Functional Description 1.9 POINTER REGISTER (Selects which registers will be read from or written to P0–P2: Register Select P3–P7: Must be kept zero. 1.10 TEMPERATURE REGISTER (Read Only): D15 D14 ...
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I C Timing Diagrams Typical 2-Byte Read From Preset Pointer Location Such as Temp or Comparison Registers Typical Pointer Set Followed by Immediate Read for 2-Byte Register such as Temp or Comparison Registers Typical 1-Byte Read from Configuration ...
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Application Hints The temperature response graph in Figure 7 depicts a typi- cal application designed to meet ACPI requirements. In this type of application, the temperature scale is given an arbi- trary value of granularity , or the window ...
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Application Hints (Continued) Note: Event Interrupt mode is drawn as if the user is reading the part. If the user doesn’t read, the outputs would go low and stay that way until the LM76 is read. FIGURE 7. Temperature ...
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Typical Applications FIGURE 9. ACPI Compatible Terminal Alarm Shutdown. By powering the LM76 from auxilary output of the power supply, a non-functioning overheated computer can be powered down to preserve as much of the system as www.national.com (Continued) possible. ...
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... Physical Dimensions inches (millimeters) unless otherwise noted 8-Lead (0.150" Wide) Molded Small Outline Package (SOP), JEDEC Order Number LM76CNM-3, LM76CNMX-3, LM76CHM-5 or LM76CHM-5X LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION ...