LM809
- Precision Monitoring of Supply Voltages
- Available Threshold Options:
2.63 V, 2.93 V, 3.08 V, 4.38 V, 4.63 V
- Available Threshold Options:
- Superior Upgrade to MAX809 and MAX810
- Fully Specified Over Temperature
- 140-ms Minimum Power-On Reset Pulse Width,
240-ms Typical- Active-Low RESET Output (LM809)
- Active-High RESET Output (LM810)
- Ensured RESET Output Valid for VCC ≥ 1 V
- Low Supply Current, 15-µA Typical
- Power Supply Transient Immunity
The LM809 and LM810 microprocessors supervisory circuits can be used to monitor the power supplies in microprocessor and digital systems. They provide a reset to the microprocessor during power-up, power-down and brown-out conditions.
The function of the LM809 and LM810 are to monitor the VCC supply voltage, and assert a reset signal whenever this voltage declines below the factory-programmed reset threshold. The reset signal remains asserted for 240 ms after VCC rises above the threshold. The LM809 has an active-low RESET output, while the LM810 has an active-high RESET output.
Seven standard reset voltage options are available, suitable for monitoring 5-V, 3.3-V, and 3-V supply voltages.
With a low supply current of only 15 µA, the LM809 and LM810 are ideal for use in portable equipment.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | LM809/LM810 3-Pin Microprocessor Reset Circuits 数据表 (Rev. E) | PDF | HTML | 2016-4-20 | ||
| 应用手册 | Voltage Supervisors (Reset ICs): Frequently Asked Questions (FAQs) (Rev. A) | 2020-3-17 | ||||
| 选择指南 | Voltage Supervisors (Reset ICs) Quick Reference Guide (Rev. H) | 2020-2-28 | ||||
| 技术文章 | Using low-Iq voltage supervisors to extend battery life in handheld electronics | PDF | HTML | 2019-9-27 | |||
| 电子书 | 电压监测仪和电压检测器：提示、技巧和基础知识 | 英语版 | 2019-8-28 | |||
| 选择指南 | 电源管理指南 2018 | 2018-7-31 | ||||
| 技术文章 | Selecting voltage detectors, supervisors, and reset ICs for system safety: part 1 | PDF | HTML | 2016-10-17 |
设计与开发
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| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| SOT-23 (DBZ) | 3 | Ultra Librarian |