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Texas Instruments TPS3899DL31DSER
- Part No.:
- TPS3899DL31DSER
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 6-WFDFN
- Datasheet:
-
TPS3899DL31DSER.pdf
- Description:
- NANOPOWER SUPERVISOR WITH PROGRA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS3899DL31DSER from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade nano-power voltage supervisor with open-drain active-low RESET output, ±0.5% threshold accuracy, 125nA typical quiescent current, and programmable sense/reset delay via external capacitors on CTS/CTR pins. It monitors critical rails or push-button inputs in ADAS camera modules and radar ECUs.
For engineers reviewing the TPS3899DL31DSER datasheet, TPS3899DL31DSER pinout, TPS3899DL31DSER application, or TPS3899DL31DSER equivalent, key selection criteria include its 0.505V adjustable VIT− threshold, 5% typical hysteresis, 1.5mm × 1.5mm WSON-6 package, and dual-capacitor delay programming for glitch-immune rail monitoring in battery-sensitive automotive systems.
Technical Context
The TPS3899DL31DSER implements a precision comparator with separate VDD and SENSE inputs, enabling independent monitoring of voltage rails distinct from its supply. Its internal 500kΩ pull-up resistors on CTS and CTR pins interface with external capacitors to set sense delay (tD-SENSE) and reset delay (tD) independently-ranging from 50µs/80µs (pins floating) to ~6.2s (10µF).
It features built-in 5% typical hysteresis (VHYS) referenced to VIT−, ensuring stable RESET assertion/deassertion against noise, and supports glitch immunity down to 10µs for 5% VIT− overdrive. The SENSE pin accepts 0–6V inputs regardless of VDD (0.85–6V), with <0.1µA input bias current, enabling high-impedance resistor-divider sensing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIT− Threshold | 0.505V (adjustable); enables precise low-voltage rail monitoring such as 0.6V core supplies or button detection. |
| Threshold Accuracy | ±0.5% (typical); ensures reliable reset assertion across –40°C to +125°C without calibration. |
| Quiescent Current | 125nA (typical); extends battery life in always-on automotive modules like telematics or sensor nodes. |
| Hysteresis (VHYS) | 5% (typical); prevents chatter during slow-rising/falling rail transitions or noisy environments. |
| Operating Voltage | 0.85V to 6V on VDD/SENSE; supports direct monitoring of sub-1V logic rails and 5V analog domains. |
| Sense Delay Range | 50µs to 6.2s (CTS capacitor); configurable immunity to short transients or intentional debouncing. |
| Reset Delay Range | 80µs to 6.2s (CTR capacitor); guarantees sufficient power/clock stabilization before processor release. |
Pinout & Package
Package: 1.5mm × 1.5mm WSON-6 (DSE), thermally enhanced, lead-free, moisture-sensitive level 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CTR | Reset delay timing input | Connects to ground-referenced capacitor to program deassertion delay (tD); internal 500kΩ pull-up sets baseline ~80µs delay. |
| 2 - CTS | Sense delay timing input | Connects to ground-referenced capacitor to program assertion delay (tD-SENSE); internal 500kΩ pull-up sets baseline ~50µs delay. |
| 3 - GND | Ground reference | Common return path for VDD, SENSE, and RESET; requires low-inductance connection to minimize noise coupling. |
| 4 - VDD | Supply voltage input | Power source (0.85–6V); decoupling with 0.1µF ceramic capacitor near pin is mandatory for stability. |
| 5 - SENSE | Monitor input | High-impedance (≤0.1µA) input for direct rail or resistor-divider monitoring; accepts 0–6V independent of VDD. |
| 6 - RESET | Open-drain active-low output | Asserts low when SENSE falls below VIT−; requires external pull-up to system I/O voltage (up to 6V). |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Sense Delay | CTS pin supports 50µs–6.2s delay via capacitor; eliminates false resets from brief voltage dips or ESD glitches. |
| Programmable Reset Delay | CTR pin supports 80µs–6.2s delay via capacitor; ensures microcontroller clocks and PLLs stabilize before exit from reset. |
| Adjustable 0.505V Threshold | Enables monitoring of ultra-low-voltage rails (e.g., 0.6V FPGA cores) without external divider, reducing BOM count. |
| AEC-Q100 Grade 1 Qualification | Validated for –40°C to +125°C ambient operation, HBM ±2kV, CDM ±750V-suitable for under-hood ADAS modules. |
| Separate VDD/SENSE Inputs | Allows monitoring of higher-voltage rails (e.g., 5V camera sensor supply) while powered from a lower-voltage domain (e.g., 1.8V MCU rail). |
Applications
| ADAS Camera Module | Radar ECU Power Sequencing |
|---|---|
|
Use Scenario: Monitors 1.2V image sensor core rail and 2.8V analog front-end supply during cold start and thermal cycling. IC Role / Device Role / Timing Role: Precision supervisor asserts RESET until both rails stabilize above VIT− + VHYS, with CTR delay ensuring clean boot after power-on. Use Value: Prevents corrupted image capture by enforcing minimum 10ms reset hold time via 100nF CTR capacitor, eliminating firmware crashes. |
Use Scenario: Controls power-up sequence of 3.3V DSP and 1.1V RF transceiver in 77GHz radar unit. IC Role / Device Role / Timing Role: Uses SENSE pin to monitor DSP supply; CTS delay filters switching noise from DC/DC converter during ramp-up. Use Value: Achieves 100µs sense delay (CTS = open) to ignore 50µs startup transients, ensuring deterministic radar initialization. |
| Automotive Infotainment Head Unit | Telematics Control Unit (TCU) |
|
Use Scenario: Detects failure of 5V USB-C PD port supply and triggers controlled shutdown of display subsystem. IC Role / Device Role / Timing Role: SENSE tied to 5V rail; VIT− = 4.75V (via resistor divider); RESET drives enable line of load switch. Use Value: 0.5% threshold accuracy avoids nuisance shutdowns during ±5% line regulation, improving user experience. |
Use Scenario: Supervises 3.8V cellular modem supply in always-connected vehicle tracking system. IC Role / Device Role / Timing Role: Operates from 3.8V VDD while monitoring same rail via SENSE; ultra-low 125nA IDD extends sleep-mode battery life. Use Value: Enables >10-year coin-cell operation in GPS logging mode by minimizing quiescent current in deep-sleep state. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3899PL31DSER | Push-pull active-low RESET output; no external pull-up required; identical timing, accuracy, and package. | Better suited for systems with strict drive-strength requirements or where pull-up resistor placement is layout-constrained. | Select when driving heavy capacitive loads (>100pF) or eliminating external components is prioritized over voltage-level flexibility. |
| MAX6373KA29+T | Fixed 2.93V threshold; 1.6µA quiescent current; no programmable delay; 5-pin SOT23 package. | Limited to single-rail monitoring; lacks push-button debounce or multi-rail redundancy capability. | Choose only for cost-sensitive, non-automotive applications requiring basic reset with minimal footprint-no AEC-Q100 qualification. |
Compared with TPS3899PL31DSER, the TPS3899DL31DSER offers voltage-level flexibility via external pull-up but adds one passive component; versus MAX6373KA29+T, it delivers 13× lower quiescent current, ±0.5% accuracy, and field-programmable delays essential for modern ADAS timing compliance.
Availability
TPS3899DL31DSER is available at Aetrix Electronics and suitable for Advance Driver Assistance Systems (ADAS), automotive infotainment head units, and radar electronic control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS3899DL31DSER 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, embedded processing, and automotive ICs, with decades of automotive qualification expertise and broad manufacturing scale.
The TPS3899-Q1 product line delivers ultra-low-power, AEC-Q100-compliant voltage supervision for safety-critical automotive subsystems-including camera, radar, and gateway ECUs-where precision, reliability, and compact size are mandatory.
FAQ
What is the function of the CTS pin on the TPS3899DL31DSER?
The CTS pin on the TPS3899DL31DSER programs the sense delay-the time between SENSE falling below VIT− and RESET assertion. With no capacitor, it defaults to ~50µs; adding a capacitor (e.g., 100nF) extends delay to ~66ms. This feature provides configurable immunity to voltage glitches or push-button bounce, making the TPS3899DL31DSER ideal for noisy automotive environments.
Does the TPS3899DL31DSER require an external pull-up resistor on the RESET pin?
Yes, the TPS3899DL31DSER uses an open-drain active-low RESET output, so an external pull-up resistor is mandatory. It can be connected to any voltage rail up to 6.0V-enabling level-shifting to match downstream logic (e.g., 1.8V or 3.3V I/O). The TPS3899DL31DSER itself operates from VDD = 0.85–6V, independent of the pull-up voltage.
What is the accuracy and temperature range of the TPS3899DL31DSER's voltage threshold?
The TPS3899DL31DSER provides ±0.5% typical VIT− threshold accuracy across its full operating ambient temperature range of –40°C to +125°C. This specification is guaranteed per AEC-Q100 Grade 1 testing and applies to its 0.505V adjustable threshold variant, ensuring consistent reset behavior in under-hood automotive applications.
Can the TPS3899DL31DSER monitor a voltage rail different from its supply voltage (VDD)?
Yes-the TPS3899DL31DSER features independent VDD and SENSE pins. VDD powers the IC (0.85–6V), while SENSE monitors any rail from 0–6V-including higher or lower voltages than VDD. This enables redundancy (e.g., monitoring a 5V camera rail while powered from a 1.8V MCU domain) and simplifies multi-rail supervision in complex automotive ECUs.
How does hysteresis improve system reliability in the TPS3899DL31DSER?
The TPS3899DL31DSER integrates 5% typical hysteresis (VHYS) referenced to VIT−, meaning RESET deasserts only when SENSE rises above VIT− + VHYS-not at the same point it asserted. This prevents oscillatory reset toggling during slow or noisy rail transitions, especially critical in automotive power domains subject to load-dump transients or thermal drift.
TPS3899DL31DSER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.1V
- 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)
TPS3899DL31DSER FAQ
1.How can I place an order for TPS3899DL31DSER through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3899DL31DSER 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 TPS3899DL31DSER reliable?
The price and inventory of TPS3899DL31DSER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3899DL31DSER is usually 5 days.
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Once your TPS3899DL31DSER 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 TPS3899DL31DSER?
For technical support, including TPS3899DL31DSER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3899DL31DSER requirements.
6.How does Aetrix verify that TPS3899DL31DSER is sourced from the original manufacturer or authorized distributors?
All TPS3899DL31DSER 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 TPS3899DL31DSER meets industry standards.
7.What is the process for return or replacement of TPS3899DL31DSER?
All TPS3899DL31DSER units undergo pre-shipment inspection (PSI). If there is an issue with TPS3899DL31DSER, 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 TPS3899DL31DSER part is unused and in its original packaging.
Return procedure for TPS3899DL31DSER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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