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Texas Instruments TPS35JE35JADDSER
- Part No.:
- TPS35JE35JADDSER
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 6-WFDFN
- Datasheet:
-
TPS35JE35JADDSER.pdf
- Description:
- NANO IQ PRECISION WATCHDOG TIMER
- Quantity:
- Payment:
- Shipping:
Inventory:2,846
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Product details
Overview
TPS35JE35JADDSER from Texas Instruments is a nano-power precision voltage supervisor with integrated timeout watchdog timer, designed for safety-critical embedded systems requiring ultra-low quiescent current (250nA typical), ±10% watchdog timeout accuracy, and 1.2% voltage threshold accuracy across –40°C to 125°C. It monitors VDD from 1.04V to 6.0V and asserts open-drain RESET on undervoltage or watchdog fault - used in infusion pumps and surgical equipment where supply integrity and fail-safe reset timing are critical.
For engineers reviewing the TPS35JE35JADDSER datasheet, TPS35JE35JADDSER pinout, TPS35JE35JADDSER application, or TPS35JE35JADDSER equivalent, key selection factors include its factory-programmed 1.4s watchdog timeout, 5s startup delay, 25ms reset pulse width, 2.75V fixed undervoltage threshold, and WSON-6 (DSE) package compatibility with space-constrained medical and industrial control PCBs.
Technical Context
The TPS35JE35JADDSER implements a dual-function architecture: a high-accuracy under-voltage supervisor with 5% typical hysteresis and a programmable timeout watchdog timer with on-the-fly scaling (1× or 2×). Its voltage detection path uses a precision reference and comparator with glitch immunity ≥15µs at 5% VIT– overdrive.
Watchdog operation is enabled via WD-EN pin and triggered by falling-edge transitions on WDI; timeout is set by internal oscillator calibrated to ±10% max error. The device supports latched output mode and integrates MR (manual reset) functionality with 100kΩ internal pull-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | VDD = 1.04V to 6.0V - supports single-cell LiFePO₄, multi-rail industrial supplies, and low-voltage microcontrollers. |
| Undervoltage Threshold (VIT−) | 2.75V ±1.2% - factory-set fixed threshold enables precise brownout detection without external resistors. |
| Watchdog Timeout | 1.4s ±10% - factory-programmed value ensures deterministic system recovery timing in safety-critical applications. |
| Reset Pulse Width (tD) | 25ms - guarantees sufficient duration to fully reset downstream logic and prevent metastability. |
| Startup Delay (tSTRT) | 500µs - ensures stable internal biasing before enabling supervision, reducing false triggers during power ramp. |
| Quiescent Current (IDD) | 250nA typical - enables multi-year battery life in portable medical devices and remote sensors. |
| Output Type | Open-drain active-low RESET - allows wired-OR configuration and flexible pull-up voltage selection up to 6V. |
Pinout & Package
TPS35JE35JADDSER is packaged in a 6-pin WSON (DSE) package measuring 1.50mm × 1.50mm, optimized for high-density PCB layouts in medical and industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Accepts 1.04–6.0V; requires 0.1µF bypass capacitor for noise immunity in noisy environments. |
| WDI | Watchdog input | Falling-edge-triggered; must be toggled before 1.4s timeout expires to prevent RESET assertion. |
| SET0 | Watchdog configuration input | Used with SET1/WD-EN to select timer scaling (1× or 2×); tied to GND or VDD per application needs. |
| WD-EN | Watchdog enable/disable control | Logic-high enables watchdog; logic-low disables monitoring - supports safe firmware update windows. |
| GND | Ground reference | Common return path for all internal circuits; must be low-impedance connection to minimize noise coupling. |
| RESET | Active-low reset output | Open-drain output asserted during VDD < 2.75V or watchdog timeout; requires external pull-up resistor. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed watchdog timeout | 1.4s ±10% accuracy eliminates external timing components and reduces BOM count. |
| Latched output mode | RESET remains asserted until manually cleared via MR or VDD cycle - prevents spurious recovery after fault. |
| 5s watchdog startup delay | Delays watchdog monitoring until system initialization completes, avoiding premature resets during boot. |
| 2.75V fixed undervoltage threshold | Enables direct monitoring of 3.3V rail with 10% headroom - no resistor divider needed for standard logic supplies. |
| MR (Manual Reset) support | Active-low input with 100kΩ internal pull-up allows external push-button or processor-controlled reset initiation. |
Applications
| Infusion Pump Control | Surgical Equipment Monitoring |
|---|---|
|
Use Scenario: Real-time motor and sensor supervision during drug delivery, where power interruption must trigger immediate hardware reset. IC Role / Device Role / Timing Role: Voltage supervisor and watchdog co-monitor VDD and firmware execution; asserts RESET within 25ms if supply drops below 2.75V or WDI misses 1.4s window. Use Value: Prevents unintended dosing by guaranteeing deterministic reset behavior compliant with IEC 62304 Class C software safety requirements. |
Use Scenario: Power integrity assurance in battery-powered electrosurgical generators operating in RF-noisy OR environments. IC Role / Device Role / Timing Role: Provides independent brownout detection and watchdog supervision with 500µs startup delay to avoid false triggers during high-dV/dt switching events. Use Value: Enables >10-year battery life (250nA IDD) while maintaining fail-safe reset timing essential for ISO 13485-certified medical hardware. |
| HVAC Controller Supervision | Electricity Meter Firmware Protection |
|
Use Scenario: Long-term reliability monitoring of microcontroller-based HVAC logic boards exposed to wide temperature swings (–40°C to 125°C). IC Role / Device Role / Timing Role: Undervoltage supervisor with 5% hysteresis prevents oscillatory reset during marginal supply conditions; watchdog enforces firmware health checks every 1.4s. Use Value: Eliminates field failures caused by supply droop during compressor startup, validated across full automotive-grade temperature range. |
Use Scenario: Tamper-resistant firmware supervision in revenue-grade electricity meters requiring secure boot and runtime integrity verification. IC Role / Device Role / Timing Role: Latched RESET output holds microcontroller in reset until meter firmware validates cryptographic signatures - preventing unauthorized code execution. Use Value: Meets ANSI C12.22 and IEC 62056 security mandates by coupling watchdog timeout with manual reset clearance for secure state recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor + timeout watchdog applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS35JE42IADDSER | 2.75V → 3.1V VIT−; 1s → 1.4s watchdog; 20ms → 25ms tD; same DSE-6 package | Designed for 3.3V rail monitoring with tighter timing margin; lacks 5s startup delay option | Select when higher threshold tolerance is required and startup delay flexibility is not needed. |
| TPS3435JFMAFDSER | No voltage supervisor; watchdog-only; 50s timeout; 10s startup delay; open-drain WDO only | Targeted at long-interval system health checks without supply monitoring - e.g., remote sensor node sleep cycles | Choose only if voltage supervision is handled externally and extended watchdog intervals are mandatory. |
Compared with TPS35JE42IADDSER and TPS3435JFMAFDSER, the TPS35JE35JADDSER uniquely combines 2.75V undervoltage detection, 1.4s watchdog, 5s startup delay, and latched output in a 1.5mm × 1.5mm WSON package - making it optimal for compact, safety-critical medical designs requiring coordinated power and firmware supervision.
Availability
TPS35JE35JADDSER is available at Aetrix Electronics and suitable for infusion pump control, surgical equipment monitoring, HVAC controller supervision, and electricity meter firmware protection requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TPS35JE35JADDSER includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of experience delivering high-reliability components for automotive, industrial, and medical applications.
The TPS35 family delivers nano-power, precision voltage supervision and programmable watchdog functionality specifically for safety-critical embedded systems where deterministic reset behavior and ultra-low power consumption are non-negotiable design requirements.
FAQ
What is the exact undervoltage threshold voltage of the TPS35JE35JADDSER?
The TPS35JE35JADDSER has a factory-programmed fixed undervoltage threshold (VIT−) of 2.75V with ±1.2% accuracy across –40°C to 125°C. This value is laser-trimmed during production and does not require external resistor networks, ensuring consistent brownout detection for 3.3V supply rails with appropriate margin.
Does the TPS35JE35JADDSER support manual reset functionality?
Yes, the TPS35JE35JADDSER supports manual reset via its MR pin, which is internally pulled up to VDD with 100kΩ resistance. Driving MR low asserts the RESET output immediately, independent of VDD level or watchdog state - enabling hardware-initiated recovery for field service or firmware debugging.
What is the watchdog startup delay for the TPS35JE35JADDSER?
The TPS35JE35JADDSER features a factory-programmed watchdog startup delay of 5 seconds. This delay begins after VDD exceeds VPOR (900mV) and prevents watchdog timeout assertions during microcontroller boot and initialization sequences, reducing risk of spurious resets.
Is the TPS35JE35JADDSER's RESET output latched or auto-resetting?
The TPS35JE35JADDSER supports latched output mode: once RESET is asserted due to undervoltage or watchdog timeout, it remains asserted until cleared either by cycling VDD below VPOR or by asserting MR low and releasing it after VDD stabilizes above VIT− - ensuring reliable fault containment.
What package type and dimensions does the TPS35JE35JADDSER use?
The TPS35JE35JADDSER is supplied in a 6-pin WSON package (DSE variant) with nominal body size 1.50mm × 1.50mm. It features wettable flanks for automated optical inspection and is compatible with standard reflow profiles per JEDEC J-STD-020.
TPS35JE35JADDSER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Type:
- Watchdog Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.75V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WSON (1.5x1.5)
TPS35JE35JADDSER FAQ
1.How can I place an order for TPS35JE35JADDSER through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS35JE35JADDSER on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS35JE35JADDSER reliable?
The price and inventory of TPS35JE35JADDSER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS35JE35JADDSER is usually 5 days.
3.What payment methods are accepted for TPS35JE35JADDSER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS35JE35JADDSER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS35JE35JADDSER?
TPS35JE35JADDSER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS35JE35JADDSER order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS35JE35JADDSER?
For technical support, including TPS35JE35JADDSER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS35JE35JADDSER requirements.
6.How does Aetrix verify that TPS35JE35JADDSER is sourced from the original manufacturer or authorized distributors?
All TPS35JE35JADDSER products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS35JE35JADDSER meets industry standards.
7.What is the process for return or replacement of TPS35JE35JADDSER?
All TPS35JE35JADDSER units undergo pre-shipment inspection (PSI). If there is an issue with TPS35JE35JADDSER, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS35JE35JADDSER part is unused and in its original packaging.
Return procedure for TPS35JE35JADDSER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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