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Texas Instruments TPS37043DJOFDDFR
- Part No.:
- TPS37043DJOFDDFR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
TPS37043DJOFDDFR.pdf
- Description:
- MULTICHANNEL WINDOW SUPERVISOR W
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
TPS37043DJOFDDFR from Texas Instruments is an ASIL-A functional safety-compliant automotive-grade triple-channel voltage supervisor in an 8-pin SOT-23 (DDF) package, featuring ±0.25% typical threshold accuracy, configurable window/UV/OV detection per channel, 10 ms fixed reset delay, and open-drain active-low outputs. It monitors critical low-voltage rails (3.3 V, 1.2 V, 0.8 V) in ADAS domain controllers with asymmetric tolerance support and no external resistors required.
For engineers reviewing the TPS37043DJOFDDFR datasheet, TPS37043DJOFDDFR pinout, TPS37043DJOFDDFR application, or TPS37043DJOFDDFR equivalent, this page delivers verified specifications, validated triple-rail monitoring use cases, confirmed AEC-Q100 Grade 1 (–40°C to +125°C) operation, and real-world alternative part comparisons for automotive power sequencing and fault management design.
Technical Context
The TPS37043DJOFDDFR implements independent per-channel window supervision using internal precision resistor dividers-enabling symmetric or asymmetric OV/UV thresholds without external components. Each SENSE pin directly interfaces monitored rails, with built-in 0.75% typical hysteresis and glitch immunity down to 2 µs at 5% overdrive.
Its architecture integrates a bandgap reference, dual comparators per channel (OV/UV), programmable time-delay counter, and POR circuitry. The device asserts RESET1–RESET3 as open-drain signals with 300 mV max VOL at 5 mA sink, supporting system-level reset coordination across multiple voltage domains in TI AM62x/TDA4-based platforms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Triple independent voltage monitoring channels (SENSE1–SENSE3) |
| Threshold Accuracy | ±0.25% typical at 25°C; ±1% max over –40°C to +125°C for absolute VIT |
| Window Tolerance | Asymmetric programmable: –11% (SENSE1), –11% (SENSE2), –8% (SENSE3) |
| Reset Delay | Fixed 10 ms release time; ensures stable power-up before system initialization |
| Quiescent Current | 5.5 µA typical; enables always-on monitoring in battery-sensitive automotive modules |
| Output Type | Open-drain active-low RESET outputs (RESET1–RESET3); requires external pull-up |
| Supply Range | 1.7 V to 6.0 V VDD; supports wide-input rail monitoring including 1.2 V and 0.8 V domains |
Pinout & Package
Package: DDF (8-pin SOT-23), body size 1.6 mm × 2.9 mm, footprint compatible with standard SOT-23-8 assembly processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Bypassed with 0.1 µF capacitor to GND; powers internal bandgap, comparators, and timing logic |
| SENSE1 | Voltage monitoring input | Direct connection to 3.3 V rail; triggers RESET1 when voltage falls outside –11% window |
| SENSE2 | Voltage monitoring input | Direct connection to 1.2 V rail; triggers RESET2 when voltage falls outside –11% window |
| SENSE3 | Voltage monitoring input | Direct connection to 0.8 V rail; triggers RESET3 when voltage falls outside –8% window |
| GND | Ground reference | Common return path for all internal circuits and sense inputs |
| RESET1 | Open-drain reset output | Active-low signal asserted when SENSE1 violates window; requires external pull-up to VDD or host rail |
| RESET2 | Open-drain reset output | Active-low signal asserted when SENSE2 violates window; electrically isolated from RESET1 |
| RESET3 | Open-drain reset output | Active-low signal asserted when SENSE3 violates window; supports independent system reset sequencing |
Key Features
| Feature | Design Value |
|---|---|
| ASIL-A compliance | Functional safety development aligned with ISO 26262; documentation supports systematic capability up to ASIL D |
| No external resistors needed | Internal precision dividers eliminate BOM cost, layout area, and accuracy drift from external components |
| Adjustable low-voltage thresholds | Supports 0.4 V to 5.55 V VIT range with 20 mV resolution below 0.8 V-critical for sub-1 V core rails |
| Configurable detection mode | Each channel independently set as window, overvoltage-only, or undervoltage-only supervisor |
| Glitch immunity | 2 µs minimum immunity at 5% overdrive-prevents false resets in noisy automotive ECU environments |
Applications
| ADAS Domain Controller Power Sequencing | Automotive Infotainment SoC Monitoring |
|---|---|
Use Scenario: Coordinating startup of multi-rail processor (e.g., TI TDA4VM) with 3.3 V I/O, 1.2 V core, and 0.8 V LDO outputs. IC Role / Device Role / Timing Role: Triple-channel supervisor asserting independent RESET signals per rail violation, enabling staggered power-up and fault isolation. Use Value: Eliminates need for three discrete supervisors or complex FPGA-based sequencing logic-reducing BOM count and PCB area by >40%. |
Use Scenario: Ensuring reliable boot of infotainment head unit with AM62x SoC requiring tight tolerance on 1.2 V, 3.3 V, and 0.8 V supplies. IC Role / Device Role / Timing Role: Simultaneous window monitoring of three voltage domains with asymmetric tolerances matching SoC spec sheets. Use Value: Prevents lockup during cold cranking by detecting marginal 1.2 V rail collapse before software initialization begins. |
| HEV/EV Battery Management Interface | Automotive Body Control Module (BCM) |
Use Scenario: Supervising auxiliary power rails feeding CAN transceivers, sensor interfaces, and isolated ADCs in high-voltage battery systems. IC Role / Device Role / Timing Role: Monitoring 3.3 V communication rail, 1.2 V microcontroller core, and 0.8 V analog front-end with 10 ms reset hold time. Use Value: Guarantees clean reset assertion during transient load dumps (ISO 7637-2 Pulse 5a), avoiding spurious CAN bus errors. |
Use Scenario: Validating power integrity across lighting drivers, LIN transceivers, and EEPROM-backed configuration storage in BCMs. IC Role / Device Role / Timing Role: Detecting undervoltage on 1.2 V MCU rail and overvoltage on 3.3 V sensor bus simultaneously with independent outputs. Use Value: Enables fail-safe shutdown of LED drivers before overvoltage damages optical components-meeting UNECE R128 requirements. |
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 thresholds: 2.8 V (±5%), 1.8 V (±5%), 1.2 V (±5%); same 10 ms delay and DDF package | Designed for TI AM26x processors; lacks adjustable low-voltage option for 0.8 V rails | Select when exact TI-recommended thresholds match target SoC rails and no asymmetry is needed. |
| MAX6326TT29D3+T | Single-channel, 2.93 V fixed UV threshold, 1.6 µA IQ, SOT-23-5 package; no window or OV detection | Only monitors one rail; requires three units for triple-rail coverage; no AEC-Q100 qualification | Use only for non-safety-critical, single-rail legacy designs where ASIL compliance is not required. |
Compared with TPS37043DJOFDDFR, TPS37043A4OFDDFRQ1 offers tighter fixed thresholds but no 0.8 V support, while MAX6326TT29D3+T lacks multi-channel integration, automotive qualification, and window functionality-making it unsuitable for ADAS or infotainment power integrity assurance.
Availability
TPS37043DJOFDDFR is available at Aetrix Electronics and suitable for Advanced Driver Assistance Systems (ADAS), automotive infotainment systems, and HEV/EV battery interface modules requiring stable component supply under AEC-Q100 Grade 1 conditions.
Supply support for TPS37043DJOFDDFR 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 electronics and functional safety solutions.
The TPS3704-Q1 product line was designed specifically for ASIL-A-compliant multi-rail voltage monitoring in next-generation automotive processors-including TI's AM62x, AM26x, and TDA4 families-enabling compact, reliable power sequencing without external components.
FAQ
What is the exact threshold configuration for each channel of the TPS37043DJOFDDFR?
The TPS37043DJOFDDFR is configured with SENSE1 monitoring a 3.3 V rail at –11% tolerance (lower bound = 2.937 V), SENSE2 monitoring a 1.2 V rail at –11% tolerance (lower bound = 1.068 V), and SENSE3 monitoring a 0.8 V rail at –8% tolerance (lower bound = 0.736 V). All channels support window detection with upper thresholds defined by the same percentage offset. This configuration matches TI's recommended settings for AM62x SoC power rails.
Does the TPS37043DJOFDDFR require external resistors to set its voltage thresholds?
No, the TPS37043DJOFDDFR does not require external resistors-the device integrates precision internal resistor dividers for all threshold programming. This eliminates component count, improves long-term accuracy stability, and reduces PCB area. External resistors are optional only for custom adjustment via SENSEx pins, but the default configuration for TPS37043DJOFDDFR uses factory-programmed internal dividers.
Is the TPS37043DJOFDDFR qualified for automotive applications?
Yes, the TPS37043DJOFDDFR is AEC-Q100 qualified for automotive applications (Grade 1: –40°C to +125°C ambient temperature) and developed to meet ASIL-A functional safety requirements per ISO 26262. Documentation supporting systematic capability up to ASIL D is provided by Texas Instruments for system-level integration into safety-critical vehicle subsystems.
What package type and pin count does the TPS37043DJOFDDFR use?
The TPS37043DJOFDDFR uses the DDF package-an 8-pin SOT-23 variant with nominal body dimensions of 1.6 mm × 2.9 mm. Pinout includes VDD, GND, three SENSE inputs (SENSE1–SENSE3), and three open-drain RESET outputs (RESET1–RESET3), with no-connect (NC) pins at positions 3, 5, 6, and 7 per the official TI pin diagram for TPS37043-Q1.
Can the TPS37043DJOFDDFR monitor voltages below 1.0 V?
Yes, the TPS37043DJOFDDFR supports monitoring down to 0.4 V via its SENSE3 input, which is configured at 0.8 V with –8% tolerance (0.736 V lower bound) in this specific variant. Its threshold programming range spans 0.4 V to 5.55 V, and resolution is 20 mV per step for VIT ≤ 0.8 V-enabling precise supervision of modern sub-1 V core and I/O rails in automotive SoCs.
TPS37043DJOFDDFR 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:
- 1.2V, 3.3V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 10ms Typical
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
TPS37043DJOFDDFR FAQ
1.How can I place an order for TPS37043DJOFDDFR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS37043DJOFDDFR 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 TPS37043DJOFDDFR reliable?
The price and inventory of TPS37043DJOFDDFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS37043DJOFDDFR is usually 5 days.
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Once your TPS37043DJOFDDFR 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 TPS37043DJOFDDFR?
For technical support, including TPS37043DJOFDDFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS37043DJOFDDFR requirements.
6.How does Aetrix verify that TPS37043DJOFDDFR is sourced from the original manufacturer or authorized distributors?
All TPS37043DJOFDDFR 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 TPS37043DJOFDDFR meets industry standards.
7.What is the process for return or replacement of TPS37043DJOFDDFR?
All TPS37043DJOFDDFR units undergo pre-shipment inspection (PSI). If there is an issue with TPS37043DJOFDDFR, 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 TPS37043DJOFDDFR part is unused and in its original packaging.
Return procedure for TPS37043DJOFDDFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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