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Texas Instruments TPS3899DL28DSER
- Part No.:
- TPS3899DL28DSER
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 6-WFDFN
- Datasheet:
-
TPS3899DL28DSER.pdf
- Description:
- 36-V LOW RON, 1:1, 4 CHANNEL, MU
- Quantity:
- Payment:
- Shipping:
Inventory:3,506
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Product details
Overview
TPS3899DL28DSER from Texas Instruments is a nano-power, precision voltage supervisor with push-button monitoring capability, ±0.5% threshold accuracy, 125nA typical quiescent current, and programmable sense/reset delay via CTS/CTR pins. It operates from 0.85V to 6V supply and monitors external rails or buttons using a dedicated high-impedance SENSE pin - deployed in battery-powered electricity meters and industrial control modules.
For engineers reviewing the TPS3899DL28DSER datasheet, TPS3899DL28DSER pinout, TPS3899DL28DSER application, or TPS3899DL28DSER equivalent, key selection criteria include its open-drain active-low RESET output, 0.8V fixed threshold, 5% typical hysteresis, –40°C to +125°C operation, and WSON-6 package compatibility with space-constrained PCB layouts.
Technical Context
The TPS3899DL28DSER implements dual capacitor-programmable timing: CTS sets sense delay (assertion) and CTR sets reset delay (deassertion), both supporting 30µs–6.5s range via external capacitors. Its internal comparator features built-in 5% hysteresis and glitch immunity up to 10µs for 5% VIT− overdrive.
It decouples SENSE from VDD, enabling independent rail monitoring (e.g., 1.8V core rail while powered from 3.3V), and supports manual reset via CTS pin. The DL variant provides open-drain active-low RESET requiring an external pull-up resistor, compatible with mixed-voltage I/O systems up to 6V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Range | 0.85V to 6V - supports ultra-low-voltage microcontrollers and wide-input industrial supplies |
| Threshold Voltage | 0.8V fixed (DL28 suffix) - factory-trimmed for precise 0.8V rail monitoring without external resistors |
| Threshold Accuracy | ±0.5% (typical) - ensures reliable reset assertion across temperature and voltage variation |
| Quiescent Current | 125nA (typical) - enables multi-year battery life in always-on IoT and metering applications |
| Hysteresis | 5% (typical) - prevents chatter during slow-ramping or noisy supply conditions |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive, industrial PLC, and data center edge use |
| Package | WSON-6 (1.5mm × 1.5mm) - surface-mount, thermally enhanced, footprint-compatible with space-critical designs |
Pinout & Package
TPS3899DL28DSER uses a 6-pin WSON (DSE) package with wettable flanks, 0.5mm pitch, and exposed thermal pad. Pin 1 is marked by a dot; the package is lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CTR | Reset delay timing input | Connects to ground-referenced capacitor to set deassertion delay (tD); internal 500kΩ pull-up enables ~80µs default delay when floating |
| 2 - CTS | Sense delay timing input | Connects to ground-referenced capacitor to set assertion delay (tD-SENSE); internal 500kΩ pull-up enables ~50µs default delay when floating |
| 3 - GND | Ground reference | Primary analog/digital return path; must be low-impedance and tied directly to system ground plane |
| 4 - VDD | Supply input | Powers internal circuitry; requires 0.1µF ceramic bypass capacitor placed adjacent to pin |
| 5 - SENSE | Monitored input | High-impedance (≤0.1µA leakage) input for direct rail or resistor-divider monitoring; accepts 0–6V regardless of VDD |
| 6 - RESET | Open-drain active-low output | Drives low during fault; requires external pull-up to defined logic rail (up to 6V); sinks ≤15µA at 0.85V VDD |
Key Features
| Feature | Design Value |
|---|---|
| Programmable sense & reset delay | Independent CTS/CTR capacitor control enables precise timing tuning (30µs–6.5s) for noise rejection and power sequencing |
| Dual-rail monitoring capability | SENSE pin decoupled from VDD allows monitoring of voltages outside VDD range (e.g., 1.2V rail while VDD = 3.3V) |
| Nano-power operation | 125nA typical IDD enables integration into energy-harvesting and coin-cell-powered systems without compromising battery life |
| Push-button debounce & manual reset | CTS pin functions as hardware debouncer for mechanical switches and supports forced system reset via external trigger |
| Functional safety support | Documentation available per ISO 26262 and IEC 61508 for use in ASIL-B/C and SIL-2 systems requiring certified supervision |
Applications
| Electricity Meters | Industrial PLC Modules |
|---|---|
|
Use Scenario: Monitoring backup supercapacitor voltage during main AC failure to initiate secure shutdown and data retention. IC Role / Device Role / Timing Role: Precision supervisor asserting RESET when VBACKUP drops below 0.8V, with 100ms CTS delay to ignore transient dips. Use Value: Prevents corrupted firmware writes by ensuring MCU remains in reset until backup power stabilizes below safe operating threshold. |
Use Scenario: Supervising 24V DC control rail in factory automation I/O modules exposed to EMI and load switching noise. IC Role / Device Role / Timing Role: Active-low RESET output holds processor in reset during undervoltage events; 5% hysteresis avoids oscillation on noisy 24V line. Use Value: Eliminates spurious reboots caused by relay-induced transients, improving system uptime and diagnostic reliability. |
| Automotive Body Control Module | Portable Medical Devices |
|
Use Scenario: Validating 5V microcontroller supply after cold crank (battery dip to 6V) in BCM subsystems. IC Role / Device Role / Timing Role: Monitors 5V rail via resistor divider on SENSE; asserts RESET until rail exceeds 0.8V × 6.25 = 5.0V with 5% hysteresis. Use Value: Guarantees deterministic boot sequence after engine start, meeting AEC-Q100 Grade 1 thermal requirements. |
Use Scenario: Enabling fail-safe shutdown in handheld ultrasound devices powered by single-cell Li-ion (2.7–4.2V). IC Role / Device Role / Timing Role: Supervises 3.3V LDO output; 125nA quiescent current extends battery runtime between charges. Use Value: Supports >30-day standby without recharge while maintaining guaranteed reset behavior at end-of-life voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3899PL28DSER | Push-pull active-low RESET output; no external pull-up required; identical timing, threshold, and quiescent current | Better suited for systems with strict drive-strength requirements or where pull-up resistor placement is impractical | Select when board layout constraints prevent adding a pull-up or when driving heavy capacitive loads directly |
| MAX6373XR28+T | Fixed 0.8V threshold, 1.6µA quiescent current, no programmable delay, SOT23-5 package | Limited to basic reset generation; lacks push-button monitoring, glitch immunity, and wide temp range (–40°C to +85°C only) | Choose only for cost-sensitive, non-critical applications where delay programming and extended temperature are unnecessary |
Compared with TPS3899DL28DSER, the PL28 variant removes external component dependency but increases supply current 12.8×; the MAX6373 offers lower cost but sacrifices nano-power operation, programmability, and automotive-grade temperature support.
Availability
TPS3899DL28DSER is available at Aetrix Electronics and suitable for electricity meters, industrial PLC modules, and automotive body control modules requiring stable component supply, long-lifecycle assurance, and full traceability.
Supply support for TPS3899DL28DSER 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The TPS3899 product line delivers ultra-low-power, precision voltage supervisors with integrated push-button monitoring and field-programmable timing - engineered for mission-critical reliability in battery-operated and harsh-environment systems.
FAQ
What is the exact threshold voltage of the TPS3899DL28DSER?
The TPS3899DL28DSER has a factory-trimmed fixed threshold voltage of 0.8V (±0.5% typical accuracy). The "28" in the part number explicitly denotes the 0.8V option, confirmed in TI's Device Naming Convention and Electrical Characteristics table. This value applies to the negative-going input threshold (VIT−) used for reset assertion.
Does the TPS3899DL28DSER require an external pull-up resistor on the RESET pin?
Yes, the TPS3899DL28DSER uses an open-drain active-low RESET output and requires an external pull-up resistor to a defined logic rail (up to 6V). The datasheet specifies 100kΩ as typical for 10pF load; value selection depends on rise time, bus capacitance, and interface voltage level - no pull-up is needed for PL or PH variants.
Can the TPS3899DL28DSER monitor a voltage rail different from its VDD supply?
Yes. The TPS3899DL28DSER's SENSE pin is electrically isolated from VDD and accepts input voltages from 0V to 6V regardless of VDD level. This enables monitoring of independent rails - for example, supervising a 1.2V core supply while powered from a 3.3V auxiliary rail - a key feature for redundant power architectures.
What is the minimum and maximum programmable delay range for CTS and CTR on the TPS3899DL28DSER?
The CTS (sense delay) and CTR (reset delay) pins support programmable delays from 30µs (CTS, floating) / 40µs (CTR, floating) up to approximately 6.5 seconds using 10µF capacitors. Equation-based calculation (tD = 654666 × C + tD₀) confirms this range; TI recommends limiting capacitors to 10µF to ensure full discharge during fault conditions.
Is the TPS3899DL28DSER qualified for automotive applications?
Yes. The TPS3899DL28DSER is specified over –40°C to +125°C ambient temperature and supports functional safety documentation for ISO 26262. While not AEC-Q200 stress-tested as a standalone component, its electrical specs, thermal rating, and TI's functional safety package make it suitable for automotive body electronics like BCMs when validated per system-level requirements.
TPS3899DL28DSER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Monitor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.8V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 40µs Typical
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WSON (1.5x1.5)
TPS3899DL28DSER FAQ
1.How can I place an order for TPS3899DL28DSER through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3899DL28DSER 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 TPS3899DL28DSER reliable?
The price and inventory of TPS3899DL28DSER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3899DL28DSER is usually 5 days.
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Once your TPS3899DL28DSER 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 TPS3899DL28DSER?
For technical support, including TPS3899DL28DSER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3899DL28DSER requirements.
6.How does Aetrix verify that TPS3899DL28DSER is sourced from the original manufacturer or authorized distributors?
All TPS3899DL28DSER 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 TPS3899DL28DSER meets industry standards.
7.What is the process for return or replacement of TPS3899DL28DSER?
All TPS3899DL28DSER units undergo pre-shipment inspection (PSI). If there is an issue with TPS3899DL28DSER, 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 TPS3899DL28DSER part is unused and in its original packaging.
Return procedure for TPS3899DL28DSER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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