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.
技術資料
| 上位の文書 | タイプ | タイトル | フォーマットオプション | 最新の英語版をダウンロード | 日付 | |
|---|---|---|---|---|---|---|
| * | データシート | LM809/LM810 3-Pin Microprocessor Reset Circuits データシート (Rev. E) | PDF | HTML | 2016/04/20 | ||
| アプリケーション・ノート | Voltage Supervisors (Reset ICs): Frequently Asked Questions (FAQs) (Rev. A) | 2020/03/17 | ||||
| セレクション・ガイド | Voltage Supervisors (Reset ICs) Quick Reference Guide (Rev. H) | 2020/02/28 | ||||
| 技術記事 | Using low-Iq voltage supervisors to extend battery life in handheld electronics | PDF | HTML | 2019/09/27 | |||
| e-Book（PDF） | Voltage Supervisor and Reset ICs: Tips, Tricks and Basics | 2019/06/28 | ||||
| セレクション・ガイド | 電源 IC セレクション・ガイド 2018 (Rev. R 翻訳版) | 英語版 (Rev.R) | 2018/09/13 | |||
| 技術記事 | Selecting voltage detectors, supervisors, and reset ICs for system safety: part 1 | PDF | HTML | 2016/10/17 |
設計と開発
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| パッケージ | ピン数 | CAD シンボル、フットプリント、および 3D モデル |
|---|---|---|
| SOT-23 (DBZ) | 3 | Ultra Librarian |