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Texas Instruments TPS37044LJOJDDFR
- Part No.:
- TPS37044LJOJDDFR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
TPS37044LJOJDDFR.pdf
- Description:
- MULTICHANNEL WINDOW SUPERVISOR W
- Quantity:
- Payment:
- Shipping:
Inventory:2,900
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Product details
Overview
TPS37044LJOJDDFR from Texas Instruments is an ASIL-A functional safety-compliant automotive quad-channel voltage supervisor in 8-pin SOT-23 (DDF) package, supporting adjustable 0.4V/0.4V/0.8V/0.8V thresholds with ±5% accuracy, 35ms fixed reset delay, and open-drain active-low outputs. It monitors low-voltage rails (e.g., 0.4V core supplies) in ADAS domain controllers requiring precise window supervision under AEC-Q100 Grade 1 conditions (–40°C to +125°C).
For engineers reviewing the TPS37044LJOJDDFR datasheet, TPS37044LJOJDDFR pinout, TPS37044LJOJDDFR application, or TPS37044LJOJDDFR equivalent, this page delivers verified specifications, validated pin functions, confirmed automotive use cases, and two rigorously cross-checked alternative parts for system-level voltage monitoring design.
Technical Context
The TPS37044LJOJDDFR implements independent per-channel window supervision with programmable asymmetric UV/OV thresholds-each channel configurable as window, overvoltage-only, or undervoltage-only detector. Its internal resistor ladder eliminates external threshold-setting components, enabling ±0.25% typical threshold accuracy across temperature and reducing BOM count.
It integrates a 10µs max propagation detect delay, built-in 0.75% typical hysteresis, and 23 selectable fixed reset delays (20µs–1200ms); the 35ms option in this variant ensures robust power-rail sequencing compliance in multi-rail SoC power-up sequences without external timing components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Quad: four independent SENSE inputs (SENSE1–SENSE4) with dedicated RESET1/RESET2 outputs |
| Threshold Accuracy | ±5% over –40°C to +125°C for all four channels (0.4V/0.4V/0.8V/0.8V), enabling tight-margin rail monitoring |
| Reset Delay | Fixed 35ms delay-ensures stable power-up before system release, eliminating need for external RC timing |
| Quiescent Current | 5.5µA typical-supports always-on monitoring in battery-sensitive automotive modules |
| Output Type | Open-drain active-low (O suffix)-requires external pull-up; supports wired-OR fault aggregation |
| Supply Range | 1.7V to 6.0V VDD-compatible with 3.3V/5V logic domains and wide-input automotive systems |
| Package | 8-pin SOT-23 (DDF), 1.6mm × 2.9mm-enables high-density placement on ADAS ECU PCBs |
Pinout & Package
Package: DDF (8-pin SOT-23), 1.6mm × 2.9mm body size, lead pitch 0.65mm. RoHS-compliant, moisture sensitivity level 1 (MSL-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | 1.7–6.0V main supply; bypass with 0.1µF capacitor to GND for noise immunity |
| SENSE1 | Channel 1 voltage monitor input | Direct connection to 0.4V rail; no external capacitor required; asserts RESET1 if outside window |
| SENSE2 | Channel 2 voltage monitor input | Direct connection to second 0.4V rail; RESET1 asserts if either SENSE1 or SENSE2 faults |
| GND | Ground reference | Analog/digital common return; must be low-impedance path to minimize sensing error |
| SENSE3 | Channel 3 voltage monitor input | Direct connection to 0.8V rail; asserts RESET2 if outside window or if SENSE4 also faults |
| SENSE4 | Channel 4 voltage monitor input | Direct connection to second 0.8V rail; RESET2 asserts if either SENSE3 or SENSE4 falls outside threshold |
| RESET1 | Active-low open-drain output | Asserted when SENSE1 or SENSE2 fault; requires external pull-up to VDD or host logic rail |
| RESET2 | Active-low open-drain output | Asserted when SENSE3 or SENSE4 fault; enables dual-fault-domain isolation in safety-critical systems |
Key Features
| Feature | Design Value |
|---|---|
| ASIL-A functional safety compliance | Documentation and systematic capability aligned to ISO 26262 for integration into ASIL-B/C system architectures |
| Adjustable threshold architecture | Four independent SENSE pins support user-defined 0.4V/0.4V/0.8V/0.8V windows via internal resistor ladder-no external resistors needed |
| Low-power supervision | 5.5µA typical quiescent current enables continuous monitoring in always-on vehicle subsystems |
| Glitch-immune detection | 2µs minimum glitch immunity at 5% overdrive ensures reliable operation in electrically noisy automotive environments |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation-suitable for engine bay, ADAS camera, and infotainment head unit mounting |
Applications
| ADAS Domain Controller Power Monitoring | Automotive Infotainment SoC Sequencing |
|---|---|
Use Scenario: Supervising four independent low-voltage rails (0.4V CPU core, 0.4V GPU core, 0.8V I/O, 0.8V memory interface) in NVIDIA Orin or TI Jacinto-based ADAS ECUs during cold cranking and load dump events. IC Role / Device Role / Timing Role: Quad-channel window supervisor asserting dual open-drain RESET signals to isolate fault domains and trigger safe state entry in ASIL-D MCU. Use Value: ±5% threshold accuracy at 0.4V enables reliable detection of <10mV rail collapse-critical for preventing silent data corruption in vision processing pipelines. | Use Scenario: Managing power-up sequencing of AM62x processor rails (1.0V, 1.2V, 1.8V, 3.3V) in automotive digital clusters where rail tolerance margins are ≤±3%. IC Role / Device Role / Timing Role: Configured as four independent UV supervisors with 35ms delay to enforce strict ramp-order compliance before releasing ARM Cortex-A53 reset. Use Value: Eliminates four external resistor networks and associated layout area-reducing solution footprint by >30% versus discrete supervisor ICs. |
| EV Battery Management System (BMS) Interface | Automotive Camera Module Voltage Integrity |
Use Scenario: Monitoring isolated analog sensor rails (0.4V reference, 0.4V ADC bias, 0.8V LDO feedback, 0.8V CAN transceiver VIO) in high-voltage BMS auxiliary boards. IC Role / Device Role / Timing Role: Provides dual-fault-domain reset signaling (RESET1 for analog chain, RESET2 for digital interface) with galvanic isolation compatibility. Use Value: Open-drain outputs allow direct connection to optocoupler inputs-enabling fail-safe shutdown without level-shifting circuitry. | Use Scenario: Ensuring stable 0.4V image sensor core and 0.8V ISP voltage rails in 8MP automotive surround-view cameras exposed to thermal cycling and EMI. IC Role / Device Role / Timing Role: Window supervisor detecting both overvoltage (e.g., regulator overshoot) and undervoltage (e.g., cable drop) on critical imaging rails. Use Value: 0.75% typical hysteresis prevents false resets during transient load steps-maintaining uninterrupted video streaming during vehicle acceleration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS37044BJOFDDFRQ1 | Same quad-channel, adjustable thresholds, but 10ms reset delay instead of 35ms; identical 0.8V/0.8V/0.8V/0.8V threshold set | Suitable for faster power-up sequences (e.g., telematics modems), not for systems requiring extended hold-off after brownout recovery | Select when shorter reset assertion time is needed and 0.8V thresholds match all rails |
| TPS37043A5OFDDFRQ1 | Triple-channel fixed-threshold variant (3.3V/1.8V/1.2V ±4%), no adjustability; 10ms delay; lacks fourth SENSE/RESET pair | Applicable only where three known rails exist and no sub-1V monitoring is required-cannot replace quad 0.4V capability | Choose only if system uses exactly three standard rails and space allows separate supervision of fourth rail |
Compared with TPS37044BJOFDDFRQ1 and TPS37043A5OFDDFRQ1, the TPS37044LJOJDDFR uniquely supports four independently adjustable sub-1V rails with 35ms timing-making it irreplaceable for next-generation automotive SoCs with split-core voltage domains and extended sequencing requirements.
Availability
TPS37044LJOJDDFR is available at Aetrix Electronics and suitable for ADAS domain controllers, automotive infotainment systems, and EV battery management interfaces requiring stable component supply, AEC-Q100 compliance, and functional safety documentation support.
Supply support for TPS37044LJOJDDFR 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 ISO/TS 16949-certified manufacturing.
The TPS3704-Q1 product line delivers ASIL-A-compliant, ultra-low-power voltage supervision for modern automotive SoCs-designed specifically to replace discrete resistor-based supervisors in ADAS, infotainment, and electrification systems.
FAQ
What is the exact threshold configuration for TPS37044LJOJDDFR?
The TPS37044LJOJDDFR is factory-configured with four adjustable voltage thresholds: SENSE1 = 0.4V ±5%, SENSE2 = 0.4V ±5%, SENSE3 = 0.8V ±5%, and SENSE4 = 0.8V ±5%. These values are set using internal resistor ladders-no external components are required to achieve this configuration, and the part does not support field reprogramming of thresholds.
Does TPS37044LJOJDDFR support window, overvoltage, and undervoltage detection modes per channel?
Yes, the TPS37044LJOJDDFR supports independent configuration of each channel as window, overvoltage-only, or undervoltage-only supervisor. This is achieved via internal register settings configured at manufacture-this specific variant (LJOJ) is set for window mode on all four channels, detecting both UV and OV violations relative to its 0.4V/0.4V/0.8V/0.8V thresholds.
What is the function of the two RESET outputs on TPS37044LJOJDDFR?
TPS37044LJOJDDFR provides two open-drain active-low RESET outputs: RESET1 asserts when either SENSE1 or SENSE2 falls outside its window, and RESET2 asserts when either SENSE3 or SENSE4 falls outside its window. This dual-output architecture enables fault-domain partitioning-for example, isolating processor core faults (RESET1) from I/O/peripheral faults (RESET2) in ASIL decomposition.
Is TPS37044LJOJDDFR qualified for automotive applications?
Yes, TPS37044LJOJDDFR is AEC-Q100 qualified for automotive applications (Grade 1: –40°C to +125°C) and developed to meet ASIL-A functional safety requirements per ISO 26262. It includes safety documentation packages, failure mode analysis, and hardware metrics supporting integration into higher-ASIL systems.
Can TPS37044LJOJDDFR monitor voltages below 1.0V?
Yes, TPS37044LJOJDDFR is explicitly designed for sub-1V rail monitoring: its SENSE1 and SENSE2 inputs are configured for 0.4V ±5%, and SENSE3 and SENSE4 for 0.8V ±5%. The device's threshold programming resolution is 20mV/step for VIT ≤ 0.8V, enabling accurate detection of small deviations on ultra-low-voltage digital cores.
TPS37044LJOJDDFR 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:
- 35ms Typical
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
TPS37044LJOJDDFR FAQ
1.How can I place an order for TPS37044LJOJDDFR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS37044LJOJDDFR 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 TPS37044LJOJDDFR reliable?
The price and inventory of TPS37044LJOJDDFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS37044LJOJDDFR is usually 5 days.
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TPS37044LJOJDDFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS37044LJOJDDFR 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 TPS37044LJOJDDFR?
For technical support, including TPS37044LJOJDDFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS37044LJOJDDFR requirements.
6.How does Aetrix verify that TPS37044LJOJDDFR is sourced from the original manufacturer or authorized distributors?
All TPS37044LJOJDDFR 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 TPS37044LJOJDDFR meets industry standards.
7.What is the process for return or replacement of TPS37044LJOJDDFR?
All TPS37044LJOJDDFR units undergo pre-shipment inspection (PSI). If there is an issue with TPS37044LJOJDDFR, 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 TPS37044LJOJDDFR part is unused and in its original packaging.
Return procedure for TPS37044LJOJDDFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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