TPS3813-Q1
- Qualified for automotive applications
- AEC-Q100 qualified with the following results:
- Device temperature grade 1: –40°C to +125°C ambient operating temperature range
- Device HBM classification level 2
- Device CDM classification level C4B
- Window-watchdog with programmable delay and window ratio
- 6-Pin SOT-23 package
- Supply current of 9 µA (Typical)
- Power-on reset generator with a fixed delay time of 25 ms
- Precision supply-voltage monitor (VIT): 2.5 V, 3 V, 3.3 V, 5 V
- Open-drain reset output
The TPS3813-Q1 supervisory circuits provide circuit initialization and timing supervision, primarily for DSPs and processor-based systems.
During power on, the RESET pin is asserted when the supply voltage (VDD) becomes higher than 1.1 V. Thereafter, the supervisory circuit monitors VDD and keeps the RESET pin active as long as VDD remains below the threshold voltage (VIT).
An internal timer delays the return of the output to the inactive (high) state to ensure proper system reset. The delay time, td = 25 ms typical, begins after VDD has risen above the threshold voltage (VIT). When the supply voltage drops below the threshold voltage (VIT), the output becomes active (low) again. No external components are required. All the devices of this family have a fixed-sense threshold voltage (VIT) set by an internal voltage divider.
For safety-critical applications, the TPS3813-Q1 family of device s incorporate a window-watchdog with programmable delay and window ratio. The upper limit of the watchdog time-out can be set by either connecting the WDT pin to GND or VDD, or by using an external capacitor. The lower limit, and thus the window ratio, is set by connecting the WDR pin to GND or VDD. The RESET pin will assert a reset to the microcontroller if the watchdog is incorrectly serviced.
The product spectrum is designed for supply voltages of 2.5 V, 3 V, 3.3 V, and 5 V. The device s are available in a 6-pin SOT-23 package. The device s are characterized for operation over a temperature range of –40°C to 125°C.
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技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | TPS3813-Q1 Automotive Processor Supervisory Circuits With Window-Watchdog datasheet (Rev. H) | PDF | HTML | 2021/9/9 | ||
| 功能安全資訊 | TPS3813-Q1 Functional Safety FIT Rate, FMD and Pin FMA (Rev. A) | PDF | HTML | 2025/6/17 | |||
| 應用說明 | Voltage Supervisors (Reset ICs): Frequently Asked Questions (FAQs) (Rev. A) | 2020/3/17 | ||||
| 電子書 | Voltage Supervisor and Reset ICs: Tips, Tricks and Basics | 2019/6/28 | ||||
| 應用說明 | Window Watchdog Calculator for TPS3813 Voltage Supervisors (Rev. A) | 2016/9/13 | ||||
| 應用說明 | All Window Watchdog Supervisors | 2009/9/9 |
設計與開發
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TPS3813Q1EVM — 具有窗口看門狗功能的 TPS3813-Q1 處理器監控電路評估模組
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOT-23 (DBV) | 6 | Ultra Librarian |