General description

lm77 is a digital temperature sensor and a hot thermostat comparator with I2C # 8482 ; serial bus interface. This LM77 window comparator structure simplifies the design (advanced configuration and power interface) specification that conforms to ACPI's temperature control system for personal computers. When the temperature exceeds A, the INT PUT PUT activated the programmable window, and when the temperature exceeds the critical limit of programmable. The interior output can run in the comparator or event mode, and only when the T_crit_a output works in the comparator mode. The host can program the window and the critical temperature limit. The program can be used to minimize the accidental jump. Two sales (A0, A1) can be used for address selection. When the sensor is powered on, the default threshold is 2 degrees Celsius, 10 degrees Celsius, 64 degrees Celsius and 80 degrees Celsius.

3.0V to 5.5V power supply voltage range of LM77, serial bus interface, 9 -bit+symbol output, full marking range is greater than 128 Celsius to make it an ideal choice for widespread application. These include heat management and protection applications for personal computers, electronic testing equipment, office electronics, automobiles and HVAC.

Features

The window compares ACPI's design compatible temperature monitoring.

Serial bus interface

Independent leakage output temperature stopped for interrupting and criticality

Close mode to minimize power consumption

up to up to up to up to 4 LM77s connect to a single bus

9 -bit+symbol output; the number of full marks is more than 128 degrees Celsius

SOP and MSOP 8 lead packaging

Main specifications

[

[ 123] The power supply voltage 3.0V to 5.5V

Work current 250 Wei'an (typical value)

500 Weian (maximum value) [maximum value) [maximum value) [maximum value) [maximum value) 123] Disclosure 5 Wei'an (typical)

Temperature

accuracy

-10 degrees Celsius to 65 degrees Celsius ± 1.5 degrees Celsius (maximum value)

[

123] -25 degrees Celsius to 100 degrees Celsius ± 2 degrees Celsius (maximum value)

-55 degrees Celsius to 125 degrees Celsius ± 3 degrees Celsius (maximum value)

Application

System thermal management

Personal Computer

Office Electronics

Electronic testing equipment

Auto

HVAC

Absolutely maximum rated up Value (Note 1)

Power voltage-0.3V to 6.5V

The voltage of any pin -0.3V to (+vs+0.3V)

Any input current of 5 mAh

Packaging Input current (Note 2) 20 mia

t_crit_a and int output receiver

current 10 mAh

t_crit_a and int output

Voltage 6.5V 6.5V

Storage temperature 65 ° C to+125 ° C

Welding information, lead

Temperature

SOP and MSOP package (Note 3 3 )

Qi Phase (60 seconds) 215 ℉

Infrared (15 seconds) 220 degrees Celsius

Static discharge sensitivity (Note 4)

Human model 2500V

Machine model 250V

Operating rated value (Note 1, 5)

Standardous temperature range t min To +125 303C

Power supply voltage range (+vs) (Note 7)+3.0V to+5.5V

Temperature-Digital Converter features

Unless otherwise explained unless there is another explanation Otherwise, these specifications are suitable for LM77CIM-5, LM77CIMM-5 and+VS +3.3 VDC+VS +5 VDC ± 10%LM77CIM-3, LM77CIMM-3 is ± 10%(Note 7). Black body restrictions are suitable for TA TJ TMIN to TMAX; all other restrictions TA TJ +25 ° C, unless there is another instructions

Logical electrical characteristics (continued) [continuity) 123]

DC characteristics Unless otherwise explained, these specifications are applicable to+vs +5 VDC ± 10%, LM77CIMM-5 and+vs LM77CIM-3 and LM77CIMM-3+3.3 VDC of LM77CIM-5 ± 10%. The thickness limit is suitable for ta tj tmin to TMAX; all other limit ta TJ +25 ° C, unless there is another explanation.

Logical electrical characteristics (continued)

Serial bus digital switch features unless otherwise explained, these specifications are applicable to+vs +5 vdclm77cim-5 And LM77CIMM-5 is ± 10%, LM77CIM-3 and LM77CIMM-3 are+vs +3.3 VDC ± 10%, CL (load capacitor) output cable 80 PF, unless there are other regulations. thickThe body limit is suitable for TA TJ TMIN to TMAX; all other restrictions of TA TJ +25 degrees Celsius, unless there is another explanation. The switching characteristics of the LM77 fully conform to or exceed the standard C bus released by i2. The following parameters are the timing between SCL and SDA signals related to LM77. They are not I2C bus specifications.

Note 1: Absolute maximum rated value indicates the limit that the device may be damaged. During operation, DC and AC electrical specifications that exceed the rated working conditions.

Note 2: When the input voltage (VI) of any pin exceeds the power supply (VI LT; GND or Vi GT;+VS), the current of the pin should be limited to 5 milliamia. The maximum packaging input current rated value of 20 mAh will limit the number of pipes that can safely exceed the power supply when the input current is 5 mAh.

Note 3: See AN-450 surface installation method and its impact on product reliability " or the current national standard "Surface Installation " chapters other surface-installed installation devices welding methods use semiconductor linear data for semiconductor linear data manual.

Note 4: Human model