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Texas Instruments TPS37043LJOFDDFRQ1
- Part No.:
- TPS37043LJOFDDFRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
TPS37043LJOFDDFRQ1.pdf
- Description:
- AUTOMOTIVE MULTICHANNEL WINDOW S
- Quantity:
- Payment:
- Shipping:
Inventory:2,980
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Product details
Overview
TPS37043LJOFDDFRQ1 from Texas Instruments is an ASIL-A functional safety-compliant automotive triple-channel voltage supervisor in an 8-pin SOT-23 (DDF) package, supporting adjustable 0.4V/0.4V/0.8V undervoltage thresholds with ±5% accuracy, 10ms fixed reset delay, and open-drain active-low outputs-designed for monitoring low-voltage rails in ADAS domain controllers.
For engineers reviewing the TPS37043LJOFDDFRQ1 datasheet, TPS37043LJOFDDFRQ1 pinout, TPS37043LJOFDDFRQ1 application, or TPS37043LJOFDDFRQ1 equivalent, key selection criteria include its triple-channel window/UV/OV configurability, ±0.25% typical threshold accuracy across –40°C to +125°C, 5.5µA quiescent current, built-in hysteresis (0.75% typical), and AEC-Q100 Grade 1 qualification.
Technical Context
The TPS37043LJOFDDFRQ1 implements independent per-channel overvoltage and undervoltage detection using internal precision resistor dividers, eliminating external components for threshold setting. Its architecture supports asymmetric window tolerances (–11% to +11% typical) and configurable detection modes (window, UV-only, OV-only) per channel.
Each of its three SENSE inputs drives a dedicated comparator pair referenced to a bandgap-stable VREF_UV/VREF_OV, with glitch immunity ≥2µs at 5% overdrive and propagation delay ≤10µs. The device integrates a fixed 10ms reset timeout counter and POR circuitry asserting RESETx only after VDD exceeds VPOR (0.7V) and tSTRT (1ms) elapses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Triple independent voltage monitoring channels (SENSE1–SENSE3) |
| Threshold Type | Adjustable via external resistor divider; supports 0.4V/0.4V/0.8V nominal UV thresholds with ±5% accuracy |
| Reset Delay | Fixed 10ms release time-ensures stable power-up sequencing without software intervention |
| Quiescent Current | 5.5µA typical-enables always-on supervision in battery-sensitive automotive modules |
| Accuracy | ±0.25% typical threshold accuracy over –40°C to +125°C-meets tight margin requirements for 1.0V–1.2V core rails |
| Hysteresis | 0.75% typical-prevents false resets during rail noise or slow transients near trip points |
| Output Type | Open-drain active-low (O suffix)-allows wired-OR reset bus implementation with external pull-up |
Pinout & Package
Package: DDF (8-pin SOT-23), body size 1.6mm × 2.9mm, footprint compatible with industry-standard 0.65mm pitch SOT-23 layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Supply input | Power source (1.7V–6.0V); bypassed with 0.1µF capacitor to GND for noise immunity |
| SENSE1 | Channel 1 monitor input | Direct connection to first monitored rail (e.g., 0.4V core); no external capacitor required |
| SENSE2 | Channel 2 monitor input | Direct connection to second monitored rail (e.g., 0.4V I/O); supports same accuracy as SENSE1 |
| GND | Ground reference | Common return path for all analog and digital circuitry; must be low-impedance |
| SENSE3 | Channel 3 monitor input | Direct connection to third monitored rail (e.g., 0.8V memory interface); enables triple-rail supervision |
| RESET1 | Channel 1 reset output | Active-low open-drain signal asserted when SENSE1 violates UV/OV window; requires external pull-up |
| RESET2 | Channel 2 reset output | Active-low open-drain signal asserted when SENSE2 violates UV/OV window; electrically isolated from RESET1 |
| RESET3 | Channel 3 reset output | Active-low open-drain signal asserted when SENSE3 violates UV/OV window; independent timing and assertion |
Key Features
| Feature | Design Value |
|---|---|
| ASIL-A functional safety compliance | Documentation and systematic capability support ISO 26262 system-level design for automotive safety-critical subsystems |
| AEC-Q100 Grade 1 qualification | Validated operation from –40°C to +125°C ambient-suitable for under-hood and ADAS ECU environments |
| No external resistors required | Internal precision dividers eliminate BOM cost, layout area, and tolerance stacking errors for fixed-threshold variants |
| Configurable detection mode per channel | Each SENSEx pin independently set as window, UV-only, or OV-only supervisor-maximizes flexibility across rail types |
| 23 selectable reset delays | Fixed options from 20µs to 1200ms-including 10ms for TPS37043LJOFDDFRQ1-eliminates need for external timing components |
| Low-input-bias SENSE pins | 350nA max input current on adjustable SENSE inputs-minimizes loading on ultra-low-current reference rails |
Applications
| ADAS Domain Controller Power Monitoring | Automotive Infotainment SoC Sequencing |
|---|---|
Use Scenario: Supervising three independent low-voltage rails (e.g., 0.4V CPU core, 0.4V GPU core, 0.8V DDR I/O) in a radar processing ECU. IC Role / Device Role / Timing Role: Triple-channel voltage supervisor providing independent UV fault detection and 10ms reset hold-off per rail. Use Value: Prevents premature boot or lockup by ensuring all critical rails stabilize within ±5% tolerance before releasing processor reset. |
Use Scenario: Managing power-up sequence of AM62x-based head unit with multiple supply domains including 0.4V ML core, 0.4V GPU, and 0.8V display interface. IC Role / Device Role / Timing Role: Configurable triple supervisor asserting separate RESET signals to isolate faults per rail during cold start. Use Value: Enables deterministic boot flow and eliminates need for firmware-based rail validation, reducing boot time by >15ms. |
| HEV/EV Battery Management Subsystem | Automotive Body Control Module |
Use Scenario: Monitoring auxiliary 0.4V sensor bias, 0.4V CAN transceiver, and 0.8V microcontroller VDD in high-voltage battery junction box. IC Role / Device Role / Timing Role: Safety-compliant triple supervisor delivering ASIL-A-aligned reset signaling with built-in hysteresis. Use Value: Meets ISO 26262 hardware safety requirements while reducing component count versus discrete supervisor solutions. |
Use Scenario: Supervising 0.4V LIN transceiver, 0.4V door module MCU, and 0.8V LED driver rails in a multi-node body control cluster. IC Role / Device Role / Timing Role: Compact triple supervisor enabling space-constrained PCB layouts with minimal external passives. Use Value: Achieves 5.5µA quiescent current-critical for always-on body electronics meeting OEM sleep current budgets (<100µA). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS37043A4OFDDFRQ1 | Fixed 2.8V/1.8V/1.2V thresholds (±5%), same 10ms delay and DDF package | Targets higher-voltage rails (e.g., AM26x IOVDD/DVDD); not suitable for sub-1V core monitoring | Select when supervising standard logic rails instead of ultra-low-voltage cores requiring 0.4V thresholds |
| TLV809E24DBVRQ1 | Single-channel, fixed 2.4V UV detector, SOT-23-3, 1.6µA IQ, no window or OV capability | Limited to basic single-rail undervoltage detection; lacks multi-channel coordination or adjustable thresholds | Choose only for cost-sensitive, non-safety-critical single-rail applications where triple-channel and ASIL-A compliance are unnecessary |
Compared with TPS37043A4OFDDFRQ1 and TLV809E24DBVRQ1, the TPS37043LJOFDDFRQ1 uniquely supports triple adjustable sub-1V thresholds with ASIL-A documentation and integrated hysteresis-making it the only option for safety-compliant, multi-rail ultra-low-voltage supervision in modern automotive SoCs.
Availability
TPS37043LJOFDDFRQ1 is available at Aetrix Electronics and suitable for Advanced Driver Assistance Systems (ADAS), automotive infotainment systems, and HEV/EV battery management units requiring stable component supply and AEC-Q100 qualified parts.
Supply support for TPS37043LJOFDDFRQ1 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 deep expertise in automotive-grade ICs and functional safety solutions.
The TPS3704-Q1 product line was designed specifically for ASIL-A-compliant voltage supervision in automotive ECUs-addressing the demand for high-accuracy, low-power, multi-rail monitoring in next-generation ADAS and electrification platforms.
FAQ
What is the function of the SENSE pins on the TPS37043LJOFDDFRQ1?
The SENSE1, SENSE2, and SENSE3 pins on the TPS37043LJOFDDFRQ1 directly monitor three independent voltage rails. Each pin accepts an adjustable input (0.4V/0.4V/0.8V nominal) and triggers its corresponding RESETx output when the sensed voltage falls outside its configured undervoltage window. Input bias current is as low as 350nA, minimizing loading on sensitive reference rails.
Does the TPS37043LJOFDDFRQ1 support window voltage supervision?
Yes, the TPS37043LJOFDDFRQ1 supports full window supervision (UV + OV) on each channel. For the TPS37043LJOFDDFRQ1, SENSE1–SENSE3 can be configured independently as window, undervoltage-only, or overvoltage-only supervisors. Asymmetric tolerances (e.g., –11% UV / +3% OV) are supported per channel per the datasheet's tolerance programming range.
What is the reset timeout duration for the TPS37043LJOFDDFRQ1?
The TPS37043LJOFDDFRQ1 has a fixed 10ms reset release delay (tD). After a monitored rail returns within its threshold window, the corresponding RESETx output remains asserted for exactly 10ms before deasserting. This ensures sufficient stabilization time before downstream logic resumes operation.
Is the TPS37043LJOFDDFRQ1 qualified for automotive use?
Yes, the TPS37043LJOFDDFRQ1 is AEC-Q100 Grade 1 qualified (–40°C to +125°C) and ASIL-A functional safety-compliant. It includes ISO 26262 documentation support, systematic capability up to ASIL D, and hardware capability rated for ASIL A-making it suitable for safety-critical automotive applications including ADAS and powertrain subsystems.
How does the TPS37043LJOFDDFRQ1 achieve ±0.25% threshold accuracy?
The TPS37043LJOFDDFRQ1 achieves ±0.25% typical threshold accuracy through on-chip laser-trimmed precision resistor networks and a stable bandgap reference. This accuracy is maintained across –40°C to +125°C and applies to both undervoltage and overvoltage trip points, enabling reliable supervision of tightly regulated 0.4V and 0.8V rails in automotive SoCs.
TPS37043LJOFDDFRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 10ms Typical
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
TPS37043LJOFDDFRQ1 FAQ
1.How can I place an order for TPS37043LJOFDDFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS37043LJOFDDFRQ1 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 TPS37043LJOFDDFRQ1 reliable?
The price and inventory of TPS37043LJOFDDFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS37043LJOFDDFRQ1 is usually 5 days.
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TPS37043LJOFDDFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS37043LJOFDDFRQ1 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 TPS37043LJOFDDFRQ1?
For technical support, including TPS37043LJOFDDFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS37043LJOFDDFRQ1 requirements.
6.How does Aetrix verify that TPS37043LJOFDDFRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS37043LJOFDDFRQ1 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 TPS37043LJOFDDFRQ1 meets industry standards.
7.What is the process for return or replacement of TPS37043LJOFDDFRQ1?
All TPS37043LJOFDDFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS37043LJOFDDFRQ1, 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 TPS37043LJOFDDFRQ1 part is unused and in its original packaging.
Return procedure for TPS37043LJOFDDFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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