LM77CIMX-5/NOPB National Semiconductor, LM77CIMX-5/NOPB Datasheet
LM77CIMX-5/NOPB
Specifications of LM77CIMX-5/NOPB
*LM77CIMX-5/NOPB
LM77CIMX-5
Related parts for LM77CIMX-5/NOPB
LM77CIMX-5/NOPB Summary of contents
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... HVAC applications C® registered trademark of Philips Corporation. © 2010 National Semiconductor Corporation LM77 Features ■ Window comparison simplifies design of ACPI compatible temperature monitoring and control. ...
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... Simplified Block Diagram Connection Diagram Ordering Information Order Number LM77CIM-3; LM77CIM-3/NOPB LM77CIMX-3; LM77CIMX-3/NOPB LM77CIM-5; LM77CIM-5/NOPB LM77CIMX-5; LM77CIMX-5/NOPB LM77CIMM-3; LM77CIMM-3/NOPB LM77CIMMX-3; LM77CIMMX-3/NOPB LM77CIMM-5; LM77CIMM-5/NOPB LM77CIMMX-5 www.national.com SOP8 or MSOP 10013602 LM77 See NS Package Number M08A or MM08A Supply Voltage Package 3.3V SOP8, M08A 3.3V ...
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Pin Descriptions Label Pin # SDA 1 Serial Bi-Directional Data Line. Open Drain Output SCL 2 Serial Bus Clock Input T_CRIT_A 3 Critical Temperature Alarm Open Drain Output GND 4 Power Supply Ground INT 5 Interrupt Open Drain Output +V ...
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Absolute Maximum Ratings Supply Voltage Voltage at any Pin 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 Soldering Information, Lead Temperature Temperature-to-Digital Converter Characteristics Unless ...
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Symbol Parameter I Logic “1” Output Leakage Current OH V Low Level Output Voltage OL T_CRIT_A Output Saturation Voltage I T_CRIT_A Delay t Output Fall Time OF Serial Bus Digital Switching Characteristics Unless otherwise noted, these specifications apply for +V ...
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Note 13: Hysteresis value adds to the T LOW subtracts from the T and T_CRIT setpoints (e.g HIGH discussion of the function of hysteresis refer to Section 1.1, TEMPERATURE COMPARISON, and Note 14: Default values set at power ...
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For example user never read the part, and temperature went below T then INT would become active. It would stay LOW that way forever if a user never read the part. However if the user read the part, ...
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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 LM77 is read. 1.4 TEMPERATURE DATA FORMAT Temperature data can ...
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FAULT QUEUE A fault queue faults is provided to prevent false tripping when the LM77 is used in noisy environments. The 4 faults must occur consecutively to set flags as well as INT and 1.8 ...
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FIGURE 4. Inadvertent 8-Bit Read from 16-Bit Register where D7 is Zero (“0”) www.national.com 10 10013608 ...
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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 D13 D12 D11 ...
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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 application designed to meet ACPI requirements. In this type of application, the temperature scale is given an arbitrary val "granularity", or the window within which temperature notification events ...
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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 LM77 is read. FIGURE 7. Temperature Response Diagram for ACPI ...
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FIGURE 9. Remote HVAC temperature sensor communicates via 3 wires, including thermostat signals. FIGURE 10. ACPI Compatible Terminal Alarm Shutdown. By powering the LM77 from auxilary output of the power supply, a non-functioning overheated computer can be powered down to ...
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... Physical Dimensions 8-Lead (0.150 Wide) Molded Small Outline Package (SOP), Order Number LM77CIM-3, LM77CIMX-3, LM77CIM-5 or LM77CIMX-5 8-Lead (0.150 Wide) Molded Mini Small Outline Package (MSOP), Order Number LM77CIMM-3, LM77CIMMX-3, LM77CIMM-5 or LM77CIMMX-5 www.national.com inches (millimeters) unless otherwise noted JEDEC Registration Number MS-012 (variation AA), ...
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