نظرة عامة على المنتج
The TPS3813K33DBVR from Texas Instruments is a processor supervisory circuit with window watchdog timer and 2.93V voltage monitoring in SOT-23-6 package for safety-critical systems.
المواصفات الرئيسية
| Threshold Voltage (VIT) | 2.93 V (monitors 3.3V rail) |
| جهد الإمداد | 2V to 6V |
| Supply Current | 9 uA typical |
| Reset Delay | 25 ms fixed (power-on reset) |
| Watchdog Type | Window watchdog (programmable) |
| Watchdog Timeout | 0.25s to 2.5s (programmable via WDT pin) |
| Reset Output | Open-drain, active-low |
| Threshold Accuracy | +/-2.4% |
| الحزمة | SOT-23-6 (DBV suffix) |
| درجة حرارة التشغيل | -40 to +85 C |
الميزات
- Window watchdog requires trigger within programmable time window
- 2.93V threshold monitors 3.3V supply rail
- Safety-critical DSP and processor supervision
- Automotive ECU processor monitoring
- Industrial controller window watchdog
- Electricity meter supervisory circuit
- Medical infusion pump safety monitoring
- Safety-critical DSP and processor supervision with window watchdog
- Automotive ECU processor monitoring for ISO 26262 compliance
- Industrial controller window watchdog for SIL-rated systems
- Electricity meter supervisory circuit with 2.93V threshold
- Medical infusion pump safety monitoring with programmable window
- إلكترونيات السيارات: All automotive-grade components pass AEC-Q series certification, featuring excellent stability and durability to adapt to complex vehicle operating environments.
- الأجهزة الطبية: High-reliability components meet medical industry safety and compliance regulations, ensuring stable operation for medical equipment.
- Industrial Control & Consumer Electronics: Products conform to universal international electronic industry standards, suitable for long-term continuous operation of various equipment.
- Accepted Payment Methods
- T/T (Bank Wire Transfer): The primary settlement method for bulk orders and a widely used international payment channel.
- PayPal: Ideal for small orders, sample orders and quick payments.
Settlement Currency
US Dollar (USD) is the default settlement currency. RMB is available for domestic customers.
Bank Charges
All transfer fees, intermediary bank charges and other remittance-related expenses shall be borne by the buyer.
- Payment Requirements
- Sample and small orders: Shipment will be arranged upon full payment.
- In-stock bulk orders: Goods will be delivered within 2 to 3 working days after full payment.
- Logistics Partners
- International Express: DHL, FedEx, UPS, TNT
- Economy Logistics: Air freight and sea freight for large-volume cargo
- Domestic Delivery: SF Express, Yunda Express
- Order Processing Time
- In-stock items: Orders confirmed and fully paid before 14:00 (GMT+8) will be shipped on the same day. All other orders will be dispatched within 1 to 2 working days.
- Out-of-stock or sourced items: The delivery lead time will be confirmed separately according to brand and inventory status.
- Estimated Transit Time
- International Express: 3 – 7 working days globally
- Air Freight: 7 – 12 working days
- Sea Freight: 25 – 40 working days for heavy and large bulk cargo
- Shipping Fee Rules
- Shipping cost is calculated based on package weight, volume, destination and delivery method.
- Both freight prepaid and freight collect are available. Please provide your courier account number in advance if you choose freight collect.
- Free international express delivery is offered for large orders. Terms for long-term partners can be negotiated separately.
- Shipment Tracking
Within 24 hours after dispatch, we will send the tracking number, commercial invoice, packing list and other documents to your email or communication account. You may check the shipment status online in real time.
MOQ & Sample Service
We support flexible minimum order quantities for samples, small-batch and large-batch orders. All sample orders shall comply with the above shipping and payment policies.
Packaging Standard
All electronic components are packed with professional anti-static and shockproof materials. Original factory packaging is available for branded chips and integrated circuits.
Import Duties & Taxes
All import duties, customs clearance fees and local taxes incurred for international shipments shall be borne by the buyer. We will provide complete customs documents to assist you with clearance procedures.
- Handling of Lost or Damaged Goods
- In case of loss or severe damage during transit, please contact us within 48 hours after receiving the tracking information. We will assist you in filing a claim with the logistics provider.
- We shall not be liable for any losses caused by incorrect delivery address, wrong contact information or the buyer’s refusal to complete customs clearance.
- Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong Province, China
- Business Hours: 09:00 – 18:00, Monday to Friday. Closed on weekends and official public holidays.
- Notice: Please make an appointment via email or communication tools one day in advance, and present your order information upon pickup.
- All components are packed separately to avoid damage caused by friction and collision;
- Shockproof buffer materials are added for fragile products to ensure transportation safety;
- Each package is clearly marked with part number, quantity, batch number and specifications for easy inventory counting and management.
- Anti-static Packaging: Static-sensitive components such as chips, circuit boards and sensors are packaged with anti-static bags, shielding boxes and conductive foam in strict accordance with international anti-static standards to prevent static damage.
- Vacuum Moisture-proof Packaging: Moisture-sensitive components are vacuum-sealed with desiccants to isolate humid air, suitable for ocean transportation and long-term storage.
- Original Factory Packaging: Integrated circuits of brands such as NXP are delivered with original reels, trays or tubes by default, retaining complete original packaging and adapting to automated SMT production lines.
- Discrete Device Packaging: Discrete devices such as SMD resistors, power resistors and LEDs are quantitatively and classifiedly packaged with accurate quantity and clear marking.
- Connector / Aviation Connector Packaging: Hard outer packaging is adopted to prevent pin bending and structural deformation.
التطبيقات
The TPS3813K33DBVR from Texas Instruments is a processor supervisory circuit with a window watchdog timer designed for safety-critical applications. The device monitors a 3.3V supply rail with a 2.93V threshold voltage (+/-2.4% accuracy) and provides an open-drain reset output. The window watchdog requires the supervised processor to trigger the WDI pin within a programmable time window; triggering too early or too late causes a reset. The watchdog timeout is programmable from 0.25s to 2.5s via the WDT pin (connect to GND, VDD, or external capacitor). The K33 suffix indicates 2.93V threshold for 3.3V rail monitoring. The DBVR suffix denotes SOT-23-6 package with tape and reel.
The TPS3813K33DBVR operates as a voltage supervisor with window watchdog. (1) The voltage supervisor monitors VDD through an internal resistor divider compared with a bandgap reference. When VDD drops below the 2.93V threshold, the RESET output asserts low. After VDD rises above the threshold, an internal 25ms timer delays the RESET de-assertion to ensure a proper system reset. (2) The window watchdog provides more stringent supervision than a standard watchdog. The supervised processor must trigger the WDI pin with a falling edge within a defined time window. The upper limit of the window is set by the WDT pin (0.25s, 1s, or 2.5s depending on connection). The lower limit (window ratio) is set by the WDR pin. If the processor triggers WDI too early (below the lower limit) or too late (above the upper limit), a reset is generated. (3) The 9uA supply current enables use in battery-powered systems. The open-drain reset output can be connected to other supervisor outputs in a wired-OR configuration for multi-voltage monitoring.
| دبوس | الاسم | الوظيفة |
|---|---|---|
| 1 | WDT | Watchdog timeout programming |
| 2 | GND | أرضي |
| 3 | WDR | Watchdog window ratio setting |
| 4 | إعادة الضبط | Reset output (open drain, active low) |
| 5 | WDI | Watchdog input (falling edge trigger) |
| 6 | VDD | Supply and sense voltage (2-6V) |
| الطراز | الشركة المصنعة | الفرق الرئيسي |
|---|---|---|
| TPS3813J25DBVR | TI | 2.25V threshold (monitors 2.5V) |
| TPS3813L30DBVR | TI | 2.64V threshold (monitors 3.0V) |
| TPS3813I50DBVR | TI | 4.55V threshold (monitors 5.0V) |
| TSM1025ILT | ST | Window watchdog, 2.93V, similar |
| MAX6818MJE | ADI | Multi-voltage watchdog, different pkg |
قطع الغيار الموصى بها
العلامة التجارية:
الحزمة:
متوفر في المخزون:
دورة الشحن 3 ~ 7 أيام
الحد الأدنى للطلب هو 1
العلامة التجارية:
الحزمة:
متوفر في المخزون:
دورة الشحن 3 ~ 7 أيام
الحد الأدنى للطلب هو 1
العلامة التجارية:
الحزمة:
متوفر في المخزون:
دورة الشحن 3 ~ 7 أيام
الحد الأدنى للطلب هو 1
العلامة التجارية:
الحزمة:
متوفر في المخزون:
دورة الشحن 3 ~ 7 أيام
الحد الأدنى للطلب هو 1
العلامة التجارية:
الحزمة:
متوفر في المخزون:
دورة الشحن 3 ~ 7 أيام
الحد الأدنى للطلب هو 1
العلامة التجارية:
الحزمة:
متوفر في المخزون:
دورة الشحن 3 ~ 7 أيام
الحد الأدنى للطلب هو 1
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