TPS3851

現行

具整合式看門口定時器的高精度電壓監控器

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產品規格表

document-pdfAcrobat TPS3851 Precision Voltage Supervisor with Integrated Watchdog Timer datasheet (Rev. B) (英文) PDF | HTML

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比較替代產品

功能相同，但針腳輸出與所比較的裝置不同。

TPS35-Q1

現行

具有逾時監視計時器的車用毫微靜態電流精密監控器 250-nA IQ, enhanced watchdog accuracy, compact packaging, and on-the-fly programming

TPS3851

現行

產品規格表

立即訂購

產品詳細資料

Rating

Catalog

Number of supplies monitored

1

Threshold voltage 1 (typ) (V)

1.674, 1.728, 2.325, 2.4, 2.79, 2.88, 3.069, 3.168, 4.65, 4.8

Features

Manual reset capable, Timeout watchdog, Undervoltage monitor only, Watchdog disable, Watchdog timer

Reset threshold accuracy (%)

0.8

Iq (typ) (mA)

0.01

Output driver type/reset output

Active-low, Open-drain

Time delay (ms)

200

Watchdog timer WDI (s)

Programmable

Operating temperature range (°C)

-40 to 125

Rating

Catalog

Number of supplies monitored

1

Threshold voltage 1 (typ) (V)

1.674, 1.728, 2.325, 2.4, 2.79, 2.88, 3.069, 3.168, 4.65, 4.8

Features

Manual reset capable, Timeout watchdog, Undervoltage monitor only, Watchdog disable, Watchdog timer

Reset threshold accuracy (%)

0.8

Iq (typ) (mA)

0.01

Output driver type/reset output

Active-low, Open-drain

Time delay (ms)

200

Watchdog timer WDI (s)

Programmable

Operating temperature range (°C)

-40 to 125

VSON (DRB)

8

9 mm² (3 mm × 3 mm)

Input voltage range: VDD = 1.6V to 6.5V
0.8% Voltage threshold accuracy
Low quiescent current: IDD = 10µA (typical)
User-programmable watchdog timeout
Open-drain outputs
Precision undervoltage monitoring:
- Supports common rails from 1.8V to 5.0V
- 4% and 7% Undervoltage thresholds available
- 0.5% Hysteresis
Watchdog disable feature
Factory-programmed precision watchdog and reset timers
Manual reset input (MR)
Available in a small 3mm × 3mm, 8 pin VSON package
Junction operating temperature range: –40°C to +125°C

Input voltage range: VDD = 1.6V to 6.5V
0.8% Voltage threshold accuracy
Low quiescent current: IDD = 10µA (typical)
User-programmable watchdog timeout
Open-drain outputs
Precision undervoltage monitoring:
- Supports common rails from 1.8V to 5.0V
- 4% and 7% Undervoltage thresholds available
- 0.5% Hysteresis
Watchdog disable feature
Factory-programmed precision watchdog and reset timers
Manual reset input (MR)
Available in a small 3mm × 3mm, 8 pin VSON package
Junction operating temperature range: –40°C to +125°C

The TPS3851 combines a precision voltage supervisor with a programmable watchdog timer. The TPS3851 comparator achieves a 0.8% accuracy(–40°C to +125°C) for the undervoltage (VITN) threshold on the VDD pin. The TPS3851 also includes accurate hysteresis on the undervoltage threshold making the device an excellent choice for use with tight tolerance systems. The supervisor RESET delay features a 15% accuracy, high-precision delay timing.

The TPS3851 includes a programmable watchdog timer for a wide variety of applications. The dedicated watchdog output (WDO) enables increased resolution to help determine the nature of fault conditions. The watchdog timeouts can be programmed either by an external capacitor, or by factory-programmed default delay settings. The watchdog can be disabled via logic pins to avoid undesired watchdog timeouts during the development process.

TPS3851 is available in a small 3.00mm × 3.00mm, 8-pin VSON package.

The TPS3851 combines a precision voltage supervisor with a programmable watchdog timer. The TPS3851 comparator achieves a 0.8% accuracy(–40°C to +125°C) for the undervoltage (VITN) threshold on the VDD pin. The TPS3851 also includes accurate hysteresis on the undervoltage threshold making the device an excellent choice for use with tight tolerance systems. The supervisor RESET delay features a 15% accuracy, high-precision delay timing.

The TPS3851 includes a programmable watchdog timer for a wide variety of applications. The dedicated watchdog output (WDO) enables increased resolution to help determine the nature of fault conditions. The watchdog timeouts can be programmed either by an external capacitor, or by factory-programmed default delay settings. The watchdog can be disabled via logic pins to avoid undesired watchdog timeouts during the development process.

TPS3851 is available in a small 3.00mm × 3.00mm, 8-pin VSON package.

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TPS3851-Q1

現行

具整合式看門狗定時器的車用高精度電壓監控器 AEC-Q100 qualified version of this device

功能相似於所比較的產品。

TPS3123

現行

具看門狗定時器和手動重設的低電位作動、推拉式、供應電壓監控器 Fixed watchdog and reset time delay in a smaller SOT-23 package with push-pull output

TPS3431

現行

具有啟用功能的標準可編程看門狗定時器 A standalone watchdog timer with no built-in voltage monitoring feature

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重要文件	類型	標題	格式選項	日期
*	資料表	TPS3851 Precision Voltage Supervisor with Integrated Watchdog Timer datasheet (Rev. B)	PDF \| HTML	2025/6/19
	應用說明	Voltage Supervisors (Reset ICs): Frequently Asked Questions (FAQs) (Rev. A)		2020/3/17
	選擇指南	Voltage Supervisors (Reset ICs) Quick Reference Guide (Rev. H)		2020/2/28
	電子書	Voltage Supervisor and Reset ICs: Tips, Tricks and Basics		2019/6/28
	技術文章	Exploring watchdog timer applications	PDF \| HTML	2017/2/2
	技術文章	What is a watchdog timer and why is it important?	PDF \| HTML	2017/1/11