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Texas Instruments TPS389012QDSERQ1
- Part No.:
- TPS389012QDSERQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 6-WFDFN
- Datasheet:
-
TPS389012QDSERQ1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,727
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Product details
Overview
TPS389012QDSERQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade voltage supervisor IC that monitors 1.2 V system rails with ±1% threshold accuracy, 2.1 µA quiescent current, and user-programmable reset delay (25 µs to 30 s) via external capacitor on CT pin; it asserts an open-drain RESET signal when SENSE falls below 1.15 V or MR is pulled low-used in infotainment head units and ADAS camera power sequencing.
For engineers reviewing the TPS389012QDSERQ1 datasheet, TPS389012QDSERQ1 pinout, TPS389012QDSERQ1 application, or TPS389012QDSERQ1 equivalent, this page delivers verified functional identity, validated pin functions, confirmed temperature range (–40°C to +125°C), exact threshold behavior (VITN = 1.15 V, VITP = 1.157 V), and real-world automotive use cases without extrapolation or generic claims.
Technical Context
The TPS389012QDSERQ1 implements a precision bandgap reference and comparator-based supervision architecture with built-in hysteresis (0.325–0.825%) and glitch immunity (9 µs on SENSE, 100 ns on MR). Its CT pin uses a 1.15 µA precision current source charging a capacitor to set rising-edge reset delay, while internal pulldown resistance (200 Ω) discharges it during assertion.
It operates across 1.5 V to 5.5 V supply range, accepts SENSE inputs up to 5.5 V independent of VDD, and features manual reset input with logic-level thresholds (VIL = 0.25×VDD, VIH = 0.7×VDD). RESET remains asserted until both SENSE > VITP and MR = high for the full programmed delay period.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5 V to 5.5 V - supports wide-input systems including 3.3 V and 5 V domains while monitoring lower rails like 1.2 V |
| Negative Threshold (VITN) | 1.15 V ±1% - factory-trimmed fixed threshold optimized for 1.2 V core rail supervision |
| Positive Threshold (VITP) | 1.157 V - provides 0.6% hysteresis margin to prevent chatter during rail recovery |
| Quiescent Current | 2.1 µA typical at 3.3 V - enables battery-backed or always-on automotive subsystems with minimal standby drain |
| Reset Delay Range | 25 µs to 30 s - programmable via CT pin capacitor (0–26 µF), enabling precise alignment with MCU startup timing |
| Operating Temperature | –40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood and cockpit electronics |
| Output Type | Open-drain RESET - allows level-shifting pull-up to any rail ≤5.5 V, compatible with diverse logic families |
Pinout & Package
TPS389012QDSERQ1 is housed in a 1.5-mm × 1.5-mm, 6-pin WSON (DSE) package with wettable flanks, optimized for automated optical inspection and space-constrained automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: SENSE | Monitoring input | High-impedance node (≤100 nA leakage) accepting 0–5.5 V; triggers RESET assert when <1.15 V |
| 2: GND | Reference ground | System return path for internal comparators and CT current source; requires low-impedance connection |
| 3: MR | Manual reset input | Active-low control: logic low forces immediate RESET assert regardless of SENSE state |
| 4: VDD | Power supply | 1.5–5.5 V analog/digital supply; decoupling with 0.1 µF ceramic capacitor required per layout guidelines |
| 5: CT | Delay timing terminal | Connects to ground-referenced capacitor; 1.15 µA charging current sets tPD(r) = CCT × 1.07 + 25 µs |
| 6: RESET | Open-drain output | Drives low during fault; requires external pull-up (10 kΩ–1 MΩ) to define logic-high voltage level |
Key Features
| Feature | Design Value |
|---|---|
| Precision threshold accuracy | ±1% over –40°C to +125°C - eliminates need for external calibration in safety-critical automotive power monitoring |
| Ultra-low quiescent current | 2.1 µA typical - extends battery life in always-on modules such as telematics and gateway ECUs |
| Programmable reset timeout | 25 µs to 30 s via single capacitor - replaces multiple fixed-delay supervisors with one configurable part |
| Automotive qualification | AEC-Q100 Grade 1, HBM ±2 kV, CDM ±750 V - certified for deployment in infotainment, cluster, and ADAS systems |
| SENSE input voltage range | 0 V to 5.5 V independent of VDD - enables monitoring of higher rails (e.g., 3.3 V I/O) while powered from 1.5 V |
Applications
| Infotainment Head Unit | ADAS Camera Module |
|---|---|
Use Scenario: Monitors 1.2 V VCORE rail powering SoC in automotive infotainment system during cold cranking and load dump events. IC Role / Device Role / Timing Role: Supervises power integrity and initiates controlled system reset if VCORE drops below 1.15 V; delay set to 100 ms to accommodate slow rail stabilization. Use Value: Prevents firmware corruption by ensuring SoC only exits reset after stable 1.2 V operation, meeting ISO 16750-2 transient immunity requirements. |
Use Scenario: Ensures reliable boot of image sensor and ISP in rear-view or surround-view camera under varying battery conditions. IC Role / Device Role / Timing Role: Asserts RESET during brown-out on 1.2 V digital core; CT capacitor configures 50 ms delay to match sensor initialization sequence. Use Value: Eliminates boot failures caused by marginal 1.2 V rail recovery, improving camera readiness time and ASIL-B compliance. |
| Hybrid Digital Cluster | Automotive Gateway ECU |
Use Scenario: Guards 1.2 V microcontroller supply in TFT-LCD instrument cluster exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Detects undervoltage on MCU core rail and holds RESET asserted until rail recovers and delay expires; operates across –40°C to +125°C junction. Use Value: Guarantees deterministic cluster boot behavior in extreme climates, avoiding display glitches or blanking during thermal cycling. |
Use Scenario: Provides fail-safe reset coordination between 1.2 V application processor and 3.3 V CAN transceiver in multi-domain gateway. IC Role / Device Role / Timing Role: Uses MR pin to synchronize reset across subsystems; SENSE monitors VCORE while MR receives reset command from safety monitor. Use Value: Enables coordinated domain-wide reset without additional logic, reducing BOM count and improving diagnostic coverage for UDS DTC reporting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS389015QDSERQ1 | Fixed 1.5 V threshold (VITN = 1.44 V); otherwise identical architecture, package, and specs | Designed for 1.5 V rails (e.g., certain FPGAs or DDR termination), not 1.2 V cores | Select only when supervising 1.5 V supply; not drop-in for 1.2 V use due to 300 mV higher trip point |
| TLV809E12DBVRQ1 | Fixed 1.2 V threshold but no programmable delay; 3 µA IQ; SOT-23-3 package | Lacks CT pin and adjustable timing; limited to basic POR without post-power-up supervision | Choose for cost-sensitive, space-tolerant designs where fixed 200 ms delay suffices and board area permits larger SOT-23 |
Compared with TPS389012QDSERQ1, TPS389015QDSERQ1 shifts threshold upward for different rail voltages, while TLV809E12DBVRQ1 sacrifices programmability for smaller footprint and lower unit cost-neither offers the same combination of 1.2 V precision, ultra-low IQ, and field-configurable timing.
Availability
TPS389012QDSERQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and hybrid digital clusters requiring stable component supply with AEC-Q100 compliance and long-term production support.
Supply support for TPS389012QDSERQ1 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 company specializing in analog and embedded processing technologies, with leadership in automotive electronics, power management, and precision analog solutions.
The TPS3890-Q1 product line delivers ultra-low-power, high-accuracy voltage supervision for automotive subsystems demanding AEC-Q100 reliability, programmable timing, and robust noise immunity in harsh environments.
FAQ
What is the exact negative threshold voltage (VITN) for TPS389012QDSERQ1?
The TPS389012QDSERQ1 has a factory-trimmed negative threshold voltage (VITN) of 1.15 V with ±1% accuracy over –40°C to +125°C. This value is fixed and optimized specifically for monitoring 1.2 V rails, and differs from other variants like TPS389015QDSERQ1 (1.44 V) or TPS389018QDSERQ1 (1.73 V).
Does TPS389012QDSERQ1 support programmable reset delay, and how is it configured?
Yes, TPS389012QDSERQ1 supports user-programmable reset delay from 25 µs to 30 s using an external capacitor on the CT pin. The delay follows tPD(r) = CCT × 1.07 + 25 µs, where CCT is in µF. A 100 nF capacitor yields ~110 µs delay; a 22 µF capacitor yields ~23.8 ms. Ceramic capacitors are recommended to minimize leakage error.
Can TPS389012QDSERQ1 monitor a voltage rail higher than its VDD supply?
Yes, TPS389012QDSERQ1 can monitor SENSE inputs up to 5.5 V even when powered from as low as 1.5 V on VDD. This allows supervision of higher rails (e.g., 3.3 V I/O or 5 V analog supplies) using a low-voltage supply domain, simplifying power architecture in mixed-rail automotive systems.
What is the maximum allowable capacitor value on the CT pin of TPS389012QDSERQ1?
The maximum recommended capacitor value on the CT pin of TPS389012QDSERQ1 is 26 µF, which achieves the maximum specified reset delay of 30 s. Exceeding 26 µF does not guarantee extended delay due to internal comparator threshold limits and increased sensitivity to capacitor leakage and board parasitics.
Is TPS389012QDSERQ1 pin-compatible with other devices in the TPS3890-Q1 family?
Yes, all TPS3890-Q1 variants-including TPS389012QDSERQ1, TPS389015QDSERQ1, and TPS389018QDSERQ1-share identical 6-pin WSON (DSE) packaging and pinout. This enables direct PCB reuse across different rail voltages, provided the threshold requirement matches the selected variant's factory-set VITN.
TPS389012QDSERQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.2V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WSON (1.5x1.5)
TPS389012QDSERQ1 FAQ
1.How can I place an order for TPS389012QDSERQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS389012QDSERQ1 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 TPS389012QDSERQ1 reliable?
The price and inventory of TPS389012QDSERQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS389012QDSERQ1 is usually 5 days.
3.What payment methods are accepted for TPS389012QDSERQ1?
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4.How is shipping managed for TPS389012QDSERQ1?
TPS389012QDSERQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS389012QDSERQ1 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 TPS389012QDSERQ1?
For technical support, including TPS389012QDSERQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS389012QDSERQ1 requirements.
6.How does Aetrix verify that TPS389012QDSERQ1 is sourced from the original manufacturer or authorized distributors?
All TPS389012QDSERQ1 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 TPS389012QDSERQ1 meets industry standards.
7.What is the process for return or replacement of TPS389012QDSERQ1?
All TPS389012QDSERQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS389012QDSERQ1, 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 TPS389012QDSERQ1 part is unused and in its original packaging.
Return procedure for TPS389012QDSERQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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