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Texas Instruments TPS37044BJOFDDFRQ1
- Part No.:
- TPS37044BJOFDDFRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
TPS37044BJOFDDFRQ1.pdf
- Description:
- AUTOMOTIVE MULTICHANNEL WINDOW S
- Quantity:
- Payment:
- Shipping:
Inventory:1,465
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Product details
Overview
TPS37044BJOFDDFRQ1 from Texas Instruments is an ASIL-A functional safety-compliant automotive quad-channel adjustable window voltage supervisor in an 8-pin SOT-23 (DDF) package. It monitors four independent voltage rails with ±0.25% typical threshold accuracy, programmable window tolerance (±4% per channel), and 10 ms fixed reset delay-designed for core/GPIO rail supervision in TI AM26x/AM62x/TDA4 processors.
For engineers reviewing the TPS37044BJOFDDFRQ1 datasheet, TPS37044BJOFDDFRQ1 pinout, TPS37044BJOFDDFRQ1 application, or TPS37044BJOFDDFRQ1 equivalent, key selection considerations include its adjustable 0.8 V thresholds (±4%), open-drain active-low outputs, AEC-Q100 Grade 1 qualification (–40°C to +125°C), and integrated resistor-based threshold setting eliminating external components.
Technical Context
The TPS37044BJOFDDFRQ1 implements independent per-channel window supervision with asymmetric UV/OV tolerance programming, internal precision resistor dividers for threshold generation, and a dedicated oscillator-driven timing block enabling fixed 10 ms reset delay. Each SENSE pin accepts 0–6.0 V input with ≤2.5 µA leakage and supports direct connection to low-voltage rails (e.g., 0.8 V) without external biasing.
Its functional architecture includes dual comparators per channel (UV and OV), built-in 0.75% typical hysteresis, glitch immunity ≥2 µs at 5% overdrive, and POR/UVLO circuitry ensuring valid reset assertion down to 1.2 V VDD. The device operates across 1.7–6.0 V supply range with 5.5 µA typical quiescent current and supports push-button input via separate SENSE/VDD pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Range | 1.7 V to 6.0 V - Enables direct operation from 1.8 V, 2.5 V, 3.3 V, or 5 V system rails without LDO pre-regulation. |
| Threshold Accuracy | ±0.25% (typical) at 25°C - Ensures precise detection of narrow-margin supply tolerances in modern SoCs. |
| Window Tolerance | ±4% per channel (adjustable) - Allows asymmetric UV/OV margins (e.g., –4%/+4%) for optimized fault coverage. |
| Quiescent Current | 5.5 µA (typical) - Supports always-on monitoring in battery-sensitive automotive modules with minimal power penalty. |
| Reset Delay | 10 ms (fixed) - Guarantees stable post-power-up sequencing before system release, eliminating need for external RC timing. |
| Output Type | Open-drain active-low (O) - Permits wired-OR reset bus implementation and flexible pull-up voltage selection (up to 6 V). |
| Operating Temp | –40°C to +125°C (Grade 1) - Validated for under-hood and ADAS ECU environments per AEC-Q100 requirements. |
Pinout & Package
Package: 8-pin SOT-23 (DDF), body size 1.6 mm × 2.9 mm - ultra-compact footprint compatible with high-density automotive PCB layouts and reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Supply Input | Primary power source; bypassed with 0.1 µF capacitor to GND; enables operation from 1.7–6.0 V rails. |
| SENSE1 | Channel 1 Monitor Input | Direct connection point for first monitored rail (e.g., 0.8 V core); no external capacitor required unless noise >100 kHz. |
| SENSE2 | Channel 2 Monitor Input | Independent second rail monitor; asserts RESET1 if either SENSE1 or SENSE2 violates window threshold. |
| GND | Ground Reference | Common return path for all internal circuits and reset outputs; must be low-impedance for accurate threshold sensing. |
| RESET1 | Active-Low Open-Drain Output | Asserted when SENSE1 or SENSE2 fault; requires external pull-up; sinks up to 5 mA at VOL ≤ 300 mV. |
| SENSE3 | Channel 3 Monitor Input | Third rail monitor; faults on SENSE3 or SENSE4 trigger RESET2 output independently of RESET1 logic. |
| RESET2 | Active-Low Open-Drain Output | Dedicated output for SENSE3/SENSE4 faults; electrically isolated from RESET1 for multi-rail fault segregation. |
| SENSE4 | Channel 4 Monitor Input | Fourth rail monitor; completes quad supervision; floating if unused - no pull-up/down required. |
Key Features
| Feature | Design Value |
|---|---|
| ASIL-A Functional Safety Compliance | Systematic capability up to ASIL D with hardware capability certified to ASIL A - enables integration into ISO 26262 automotive safety architectures without additional FMEDA burden. |
| Adjustable 0.8 V Thresholds | Four independent 0.8 V ±4% windows - matches common low-voltage I/O and core rails (e.g., AM62x GPIO, TDA4 memory interfaces) without external resistors. |
| Integrated Threshold Resistors | Eliminates external R-divider components - reduces BOM count, improves long-term accuracy stability, and avoids resistor tolerance stacking errors. |
| 2 µs Glitch Immunity | Rejects transients <2 µs duration at 5% overdrive - prevents false resets from switching noise in DC/DC converters or motor drivers. |
| 10 ms Fixed Reset Delay | Factory-programmed timing - removes variability from external RC networks and ensures consistent power-up sequencing across production units. |
Applications
| ADAS Sensor Fusion ECUs | Automotive Infotainment Head Units |
|---|---|
|
Use Scenario: Real-time fusion of camera, radar, and LiDAR data in centralized domain controllers requiring simultaneous validation of multiple low-voltage processor rails. IC Role / Device Role / Timing Role: Quad-channel window supervisor asserting independent RESET1/RESET2 signals when any of four critical rails (e.g., 0.8 V core, 1.2 V I/O, 1.8 V SerDes, 3.3 V interface) deviate beyond ±4%. Use Value: Prevents corrupted sensor data ingestion by enforcing strict rail integrity before SoC boot, leveraging 5.5 µA IQ to minimize standby power in always-on perception subsystems. |
Use Scenario: Power management in head unit mainboards where AM62x SoC, display driver, audio codec, and USB-C PD controller require coordinated rail sequencing and fault isolation. IC Role / Device Role / Timing Role: Monitors four independent rails (e.g., 0.8 V CPU, 1.8 V DDR, 3.3 V HDMI, 5 V USB) with asymmetric window settings and 10 ms reset hold-off to align with bootloader timing. Use Value: Enables single-chip supervision of heterogeneous voltage domains, reducing component count vs. discrete supervisors while maintaining AEC-Q100 Grade 1 reliability. |
| EV Battery Management Interfaces | Automotive Body Control Modules |
|
Use Scenario: Supervision of isolated communication interfaces (e.g., CAN FD transceivers, isolated SPI) and auxiliary microcontrollers in high-voltage battery packs. IC Role / Device Role / Timing Role: Uses SENSE1–SENSE4 to validate isolated 3.3 V, 5 V, and dual 1.8 V rails powering isolated gate drivers and signal conditioners; RESET1/RESET2 feed separate watchdog chains. Use Value: Provides fault-segregated reset signaling for safety-critical BMS subfunctions, with ASIL-A compliance supporting functional safety goals for HV system monitoring. |
Use Scenario: Centralized lighting control modules managing LED drivers, LIN transceivers, and environmental sensors across door modules, trunk, and interior zones. IC Role / Device Role / Timing Role: Monitors 0.8 V MCU core, 1.2 V sensor interface, 3.3 V LIN PHY, and 5 V LED driver supplies; open-drain outputs interface directly with existing 5 V reset buses. Use Value: Delivers compact, low-power rail supervision in space-constrained BCM housings while meeting automotive temperature and longevity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS37044CJOFDDFRQ1 | Same quad-channel, adjustable architecture but ±6% window tolerance (vs. ±4% for TPS37044BJOFDDFRQ1) | Suitable for less stringent rail margin applications; higher tolerance relaxes design guardbanding | Select when ±6% threshold window suffices and cost optimization is prioritized over tightest accuracy |
| TPS37044MJOFDDFRQ1 | Same quad-channel, adjustable architecture with ±7% window tolerance and 0.4 V minimum threshold (vs. 0.8 V) | Supports ultra-low-voltage rails (e.g., 0.4 V AI accelerator cores); wider tolerance trades accuracy for extended range | Choose for sub-0.8 V monitoring needs where ±7% tolerance is acceptable and lower VIT is mandatory |
Compared with TPS37044CJOFDDFRQ1 and TPS37044MJOFDDFRQ1, the TPS37044BJOFDDFRQ1 delivers the tightest ±4% window tolerance among adjustable quad variants while maintaining 0.8 V threshold compatibility - optimal for high-accuracy SoC core/GPIO supervision where narrow supply margins demand precise fault detection.
Availability
TPS37044BJOFDDFRQ1 is available at Aetrix Electronics and suitable for Advanced Driver Assistance Systems (ADAS), automotive infotainment systems, and EV powertrain interfaces requiring stable component supply, AEC-Q100 compliance, and functional safety documentation support.
Supply support for TPS37044BJOFDDFRQ1 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 was engineered specifically for ASIL-A safety-critical automotive voltage monitoring, targeting next-generation ADAS, infotainment, and electrification systems requiring high-accuracy, low-power, and pin-efficient rail supervision.
FAQ
What is the exact threshold voltage configuration for TPS37044BJOFDDFRQ1?
The TPS37044BJOFDDFRQ1 is factory-configured with four adjustable 0.8 V input thresholds, each with ±4% window tolerance. This means each channel detects undervoltage below 0.768 V and overvoltage above 0.832 V. The device uses internal resistor dividers - no external components are needed to set these values, ensuring consistent accuracy across temperature and lifetime.
Does TPS37044BJOFDDFRQ1 support push-pull outputs?
No, the TPS37044BJOFDDFRQ1 features open-drain active-low outputs only (denoted by "O" in the part number suffix). It does not support push-pull or active-high configurations. External pull-up resistors are required on RESET1 and RESET2 lines, with voltage ratings up to 6.0 V supported per absolute maximum ratings.
How does the reset delay work in TPS37044BJOFDDFRQ1?
The TPS37044BJOFDDFRQ1 has a fixed 10 ms reset delay (tD) programmed at manufacture. After a voltage fault is detected on any monitored rail, the corresponding RESET output remains asserted for exactly 10 ms - even after the rail returns within threshold - ensuring reliable system reset hold time. This eliminates timing uncertainty from external RC networks.
Can TPS37044BJOFDDFRQ1 monitor voltages below 0.8 V?
No, the TPS37044BJOFDDFRQ1 is specified for 0.8 V thresholds only. For sub-0.8 V monitoring (e.g., 0.4 V), TI offers the TPS37044MJOFDDFRQ1 variant. Attempting to apply voltages below 0.4 V to SENSE pins may result in undefined behavior or failure to assert reset, as the internal comparator input range and accuracy are not characterized below 0.8 V for this specific variant.
Is TPS37044BJOFDDFRQ1 qualified for under-hood automotive use?
Yes, the TPS37044BJOFDDFRQ1 is AEC-Q100 Grade 1 qualified with operating ambient temperature range of –40°C to +125°C and junction temperature rating up to +150°C. Its thermal resistance (RθJA = 121.5°C/W) and low 5.5 µA quiescent current make it suitable for under-hood ECUs where thermal management and power efficiency are critical.
TPS37044BJOFDDFRQ1 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:
- Not Verified
- 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
TPS37044BJOFDDFRQ1 FAQ
1.How can I place an order for TPS37044BJOFDDFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS37044BJOFDDFRQ1 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 TPS37044BJOFDDFRQ1 reliable?
The price and inventory of TPS37044BJOFDDFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS37044BJOFDDFRQ1 is usually 5 days.
3.What payment methods are accepted for TPS37044BJOFDDFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS37044BJOFDDFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS37044BJOFDDFRQ1?
TPS37044BJOFDDFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS37044BJOFDDFRQ1 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 TPS37044BJOFDDFRQ1?
For technical support, including TPS37044BJOFDDFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS37044BJOFDDFRQ1 requirements.
6.How does Aetrix verify that TPS37044BJOFDDFRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS37044BJOFDDFRQ1 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 TPS37044BJOFDDFRQ1 meets industry standards.
7.What is the process for return or replacement of TPS37044BJOFDDFRQ1?
All TPS37044BJOFDDFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS37044BJOFDDFRQ1, 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 TPS37044BJOFDDFRQ1 part is unused and in its original packaging.
Return procedure for TPS37044BJOFDDFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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