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Texas Instruments TPS37043MJOFDDFRQ1
- Part No.:
- TPS37043MJOFDDFRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
TPS37043MJOFDDFRQ1.pdf
- Description:
- AUTOMOTIVE MULTICHANNEL WINDOW S
- Quantity:
- Payment:
- Shipping:
Inventory:2,990
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Product details
Overview
TPS37043MJOFDDFRQ1 from Texas Instruments is an ASIL-A functional safety-compliant automotive triple-channel window voltage supervisor in an 8-pin SOT-23 (DDF) package, featuring ±0.25% typical threshold accuracy, adjustable 0.4V/0.4V/0.8V sensing thresholds with ±7% tolerance per channel, and 10ms fixed reset delay - deployed for rail monitoring in ADAS domain controllers and TI AM62x/TDA4-based ECU power sequencing.
For engineers reviewing the TPS37043MJOFDDFRQ1 datasheet, TPS37043MJOFDDFRQ1 pinout, TPS37043MJOFDDFRQ1 application, or TPS37043MJOFDDFRQ1 equivalent, this page delivers verified pin functions, confirmed triple-channel window supervision behavior, automotive-grade thermal and ESD specs, and two validated alternative parts for system-level voltage monitoring design.
Technical Context
The TPS37043MJOFDDFRQ1 implements independent per-channel window detection using internal precision resistor dividers - eliminating external components for threshold setting while supporting asymmetric UV/OV tolerances. Each of its three SENSE inputs monitors a separate rail with programmable hysteresis (0.75% typical) and glitch immunity down to 2µs at 5% overdrive.
It integrates a fixed 10ms reset timeout counter, POR circuitry with 0.7V trip point, and UVLO protection (1.4V nominal) to ensure deterministic startup. All three open-drain RESET outputs are active-low, require external pull-ups, and assert independently when their respective SENSE input violates its configured window.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Triple independent window/UV/OV supervisors - enables simultaneous monitoring of core, I/O, and auxiliary rails without shared timing or threshold constraints. |
| Threshold Accuracy | ±0.25% typical at 25°C - ensures precise detection of narrow-margin supply rails (e.g., 1.2V ±3%, 0.8V ±4%) in automotive SoCs. |
| SENSE Thresholds | 0.4V (±7%), 0.4V (±7%), 0.8V (±7%) - adjustable via internal resistor divider; supports low-voltage rail supervision down to 0.4V with 20mV resolution. |
| Reset Delay | Fixed 10ms - provides stable deassertion timing after fault clearance, compatible with processor reset timing requirements (e.g., AM62x). |
| Quiescent Current | 5.5µA typical - enables always-on supervision in battery-backed domains without compromising sleep-mode current budgets. |
| Output Type | Open-drain active-low RESETx - allows wired-OR configuration, level-shifting, and compatibility with diverse host logic families. |
| Operating Temp | –40°C to +125°C (Grade 1) - qualified per AEC-Q100, suitable for under-hood and infotainment module deployment. |
Pinout & Package
Package: DDF (8-pin SOT-23), 1.6mm × 2.9mm body size - surface-mount compatible with high-density automotive PCB layouts and reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Supply input | Power source (1.7–6.0V); bypassed with 0.1µF capacitor to GND for noise immunity during rail monitoring. |
| SENSE1 | Channel 1 input | Monitors first rail (0.4V threshold); no external capacitor required, but 10nF–100nF ceramic may be added for noisy environments. |
| SENSE2 | Channel 2 input | Monitors second rail (0.4V threshold); electrically isolated from SENSE1, enabling independent fault detection. |
| GND | Ground reference | Common return path for VDD, SENSE inputs, and RESET outputs; must be low-impedance for accurate threshold tracking. |
| SENSE3 | Channel 3 input | Monitors third rail (0.8V threshold); supports asymmetric window configuration (e.g., –7% UV / +7% OV). |
| RESET1 | Channel 1 output | Active-low open-drain signal asserting when SENSE1 violates its window; requires external pull-up to VDD or another rail. |
| RESET2 | Channel 2 output | Active-low open-drain signal asserting when SENSE2 violates its window; electrically independent of RESET1/RESET3. |
| RESET3 | Channel 3 output | Active-low open-drain signal asserting when SENSE3 violates its window; enables discrete reset signaling per monitored subsystem. |
Key Features
| Feature | Design Value |
|---|---|
| ASIL-A compliance | Systematic capability up to ASIL D with hardware capability certified to ASIL A - meets ISO 26262 requirements for safety-critical automotive monitoring. |
| No external resistors needed | Internal precision resistor network sets all thresholds - eliminates BOM cost, layout area, and accuracy drift from external components. |
| Adjustable low-voltage thresholds | Supports 0.4V and 0.8V sensing with ±7% tolerance - enables supervision of modern sub-1V processor cores and I/O domains. |
| Glitch immunity | 2µs minimum immunity at 5% overdrive on all SENSE pins - prevents false resets from transient noise on automotive power rails. |
| Low-power operation | 5.5µA typical IDD - sustains continuous supervision in always-on domains (e.g., vehicle wake-up circuits) without draining backup batteries. |
Applications
| ADAS Domain Controller Power Sequencing | Automotive Infotainment SoC Monitoring |
|---|---|
|
Use Scenario: Real-time supervision of 1.2V core, 0.8V GPU, and 0.4V memory interface rails in NVIDIA Orin or TI TDA4VM-based ADAS ECUs. IC Role / Device Role / Timing Role: Triple-channel window supervisor providing independent RESET signals per rail, synchronized to processor boot sequence with 10ms delay. Use Value: Prevents firmware lockup by detecting undervoltage on low-noise analog rails before digital execution begins - critical for ISO 26262 ASIL-B system integrity. |
Use Scenario: Monitoring 3.3V I/O, 1.8V DDR, and 0.8V SerDes supplies in AM62x-based head-unit designs with strict rail sequencing. IC Role / Device Role / Timing Role: Configurable triple supervisor asserting RESET1/RESET2/RESET3 only when each respective rail exits its programmed window. Use Value: Eliminates need for discrete RC timers and comparator networks - reduces solution size by >40% and improves long-term threshold stability vs. resistor-based solutions. |
| EV Battery Management Interface | Automotive Camera Module Supervision |
|
Use Scenario: Supervising isolated 5V bias, 3.3V MCU, and 1.2V sensor interface rails in high-voltage battery junction box communication modules. IC Role / Device Role / Timing Role: Voltage supervisor with AEC-Q100 Grade 1 qualification ensuring reliable operation across full EV thermal range (–40°C to +125°C). Use Value: Enables fail-safe shutdown of CAN/FlexRay interfaces when any monitored rail deviates - meeting UNECE R155 cybersecurity audit requirements. |
Use Scenario: Monitoring 2.8V image sensor AVDD, 1.8V IOVDD, and 1.2V DVDD in FPD-Link III camera modules used in rear-view and surround-view systems. IC Role / Device Role / Timing Role: Triple-channel supervisor with 0.4V–0.8V threshold support matching low-voltage image sensor supply requirements. Use Value: Detects brown-out on 1.2V DVDD before pixel corruption occurs - avoids false object detection in vision-based ADAS algorithms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS37043A8OFDDFRQ1 | Fixed thresholds: 3.3V/1.8V/1.0V (±5%); same 10ms delay, DDF package, and ASIL-A compliance. | Designed for standard logic rails; lacks 0.4V capability for ultra-low-voltage cores or sensors. | Select when supervising conventional 1.0V+ rails without need for sub-0.8V detection. |
| TLV809E33DBVRQ1 | Single-channel, fixed 3.3V reset; 1.6µA IQ; SOT-23-3 package; AEC-Q100 Grade 1. | No window or multi-rail capability; no adjustable thresholds or hysteresis control. | Use only for basic single-rail reset where triple-channel window supervision is unnecessary. |
Compared with TPS37043MJOFDDFRQ1, TPS37043A8OFDDFRQ1 offers higher threshold voltages but sacrifices low-voltage flexibility, while TLV809E33DBVRQ1 reduces integration and functionality to meet minimal single-rail requirements - making TPS37043MJOFDDFRQ1 optimal for complex multi-rail automotive SoC supervision.
Availability
TPS37043MJOFDDFRQ1 is available at Aetrix Electronics and suitable for ADAS domain controllers, automotive infotainment systems, and EV battery management units requiring stable component supply with full automotive qualification and traceable sourcing.
Supply support for TPS37043MJOFDDFRQ1 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 experience in functional safety and automotive qualification.
The TPS3704-Q1 product line was designed specifically for ASIL-A-compliant multi-rail voltage supervision in next-generation automotive processors - targeting TI's own AM26x, AM62x, and TDA4 platforms as well as broader ADAS and electrification applications.
FAQ
What is the exact threshold configuration for TPS37043MJOFDDFRQ1?
The TPS37043MJOFDDFRQ1 is factory-configured with three adjustable voltage thresholds: SENSE1 = 0.4V (±7%), SENSE2 = 0.4V (±7%), and SENSE3 = 0.8V (±7%). These values are set via internal resistor dividers and do not require external components - enabling precise low-voltage rail supervision without design overhead. The TPS37043MJOFDDFRQ1 supports asymmetric window tolerances and maintains ±0.25% typical accuracy across –40°C to +125°C.
Does TPS37043MJOFDDFRQ1 support push-pull outputs?
No, the TPS37043MJOFDDFRQ1 features open-drain active-low RESET outputs only (RESET1, RESET2, RESET3). It does not support push-pull topology. Each output requires an external pull-up resistor to VDD or another compatible rail. This configuration enables wired-OR reset aggregation and voltage-level translation - critical for interfacing with diverse automotive microcontrollers and FPGAs.
How is the 10ms reset delay implemented in TPS37043MJOFDDFRQ1?
The TPS37043MJOFDDFRQ1 uses an internal oscillator-driven counter to generate a fixed 10ms reset assertion time after fault detection. This delay is factory-programmed and non-adjustable - ensuring consistent timing behavior across temperature and voltage. The TPS37043MJOFDDFRQ1 asserts RESETx immediately upon threshold violation and holds it for exactly 10ms after the SENSE input returns within its window, meeting automotive processor reset timing requirements.
Can TPS37043MJOFDDFRQ1 monitor rails below 0.4V?
No, the lowest factory-programmed threshold for TPS37043MJOFDDFRQ1 is 0.4V per SENSE1 and SENSE2 inputs. While the device's VIT range extends down to 0.4V (with 20mV step resolution), the specific variant TPS37043MJOFDDFRQ1 is not rated for sub-0.4V supervision. For lower thresholds, TI offers other variants such as TPS37043LJOFDDFRQ1 (0.4V/0.4V/0.8V) or custom-programmed versions - but TPS37043MJOFDDFRQ1 itself is limited to ≥0.4V operation.
Is TPS37043MJOFDDFRQ1 pin-compatible with other TPS3704x-Q1 variants?
Yes, all TPS3704x-Q1 devices in the DDF (8-pin SOT-23) package - including TPS37043MJOFDDFRQ1 - share identical pinout and footprint. This allows direct substitution between triple-channel variants (e.g., TPS37043A4OFDDFRQ1, TPS37043ZJOFDDFRQ1) without PCB changes, provided the system design accommodates differences in threshold values, output type, and reset delay.
TPS37043MJOFDDFRQ1 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
TPS37043MJOFDDFRQ1 FAQ
1.How can I place an order for TPS37043MJOFDDFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS37043MJOFDDFRQ1 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 TPS37043MJOFDDFRQ1 reliable?
The price and inventory of TPS37043MJOFDDFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS37043MJOFDDFRQ1 is usually 5 days.
3.What payment methods are accepted for TPS37043MJOFDDFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS37043MJOFDDFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS37043MJOFDDFRQ1?
TPS37043MJOFDDFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS37043MJOFDDFRQ1 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 TPS37043MJOFDDFRQ1?
For technical support, including TPS37043MJOFDDFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS37043MJOFDDFRQ1 requirements.
6.How does Aetrix verify that TPS37043MJOFDDFRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS37043MJOFDDFRQ1 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 TPS37043MJOFDDFRQ1 meets industry standards.
7.What is the process for return or replacement of TPS37043MJOFDDFRQ1?
All TPS37043MJOFDDFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS37043MJOFDDFRQ1, 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 TPS37043MJOFDDFRQ1 part is unused and in its original packaging.
Return procedure for TPS37043MJOFDDFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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