LM77
- Window Comparison Simplifies Design of ACPI Compatible Temperature Monitoring and Control.
- Serial Bus Interface
- Separate Open-Drain Outputs for Interrupt and Critical Temperature Shutdown
- Shutdown Mode to Minimize Power Consumption
- Up to 4 LM77s Can be Connected to a Single Bus
- 9-bit + Sign Output; Full-Scale Reading of Over 128°C
- SOIC and VSSOP 8-lead Packages
Key Specifications
- Supply Voltage 3.0V to 5.5V
- Supply Current
- Operating250 μA (typ)500 μA (max)
- Shutdown5 μA (typ)
- Temperature Accuracy
- −10°C to 65°C, ±1.5°C(max)
- −25°C to 100°C, ±2°C(max)
- −55°C to 125°C, ±3°C(max)
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The LM77 is a digital temperature sensor and thermal window comparator with an I2C Serial Bus interface. The window-comparator architecture of the LM77 eases the design of temperature control systems conforming to the ACPI (Advanced Configuration and Power Interface) specification for personal computers. The open-drain Interrupt (INT) output becomes active whenever temperature goes outside a programmable window, while a separate Critical Temperature Alarm (T_CRIT_A) output becomes active when the temperature exceeds a programmable critical limit. The INT output can operate in either a comparator or event mode, while the T_CRIT_A output operates in comparator mode only.
The host can program both the upper and lower limits of the window as well as the critical temperature limit. Programmable hysterisis as well as a fault queue are available to minimize false tripping. Two pins (A0, A1) are available for address selection. The sensor powers up with default thresholds of 2°C THYST, 10°C TLOW, 64°C THIGH, and 80°C T_CRIT.
The LM77's 3.0V to 5.5V supply voltage range, Serial Bus interface, 9-bit + sign output, and full-scale range of over 128°C make it ideal for a wide range of applications. These include thermal management and protection applications in personal computers, electronic test equipment, office electronics, automotive, and HVAC applications.
技术文档
类型 | 标题 | 下载最新的英语版本 | 日期 | |||
---|---|---|---|---|---|---|
* | 数据表 | 9Bit + Dig Temp Sens & Thermal Window Comparator w/Two-Wire Interface 数据表 (Rev. F) | 2013年 3月 22日 | |||
应用手册 | Applying I2C-Compatible Temperature Sensors in Systems With Slow Clock Edges (Rev. A) | 2013年 5月 6日 |
设计和开发
如需其他信息或资源,请点击以下任一标题进入详情页面查看(如有)。
LM77SW-LINUX — 用于 LM77 的 Linux 驱动程序
Linux 主线状态
在 Linux 主线中提供:是
可通过 git.ti.com 获取:不适用
- lm77
与该器件关联的文件为:
- drivers/hwmon/lm77.c
- Documentation/hwmon/lm77
启用驱动程序支持
使用“make menuconfig”(也可以使用“make xconfig”或“make (...)
封装 | 引脚 | CAD 符号、封装和 3D 模型 |
---|---|---|
SOIC (D) | 8 | Ultra Librarian |
VSSOP (DGK) | 8 | Ultra Librarian |
订购和质量
- RoHS
- REACH
- 器件标识
- 引脚镀层/焊球材料
- MSL 等级/回流焊峰值温度
- MTBF/时基故障估算
- 材料成分
- 鉴定摘要
- 持续可靠性监测
- 制造厂地点
- 封装厂地点