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Texas Instruments TPS37043ZJOFDDFRQ1
- Part No.:
- TPS37043ZJOFDDFRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
TPS37043ZJOFDDFRQ1.pdf
- Description:
- AUTOMOTIVE MULTICHANNEL WINDOW S
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TPS37043ZJOFDDFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (–40°C to +125°C) automotive triple-channel window voltage supervisor with ±0.25% typical threshold accuracy, fixed 10 ms reset delay, open-drain active-low outputs, and 5.5 µA typical quiescent current. It monitors three independent rails-0.95V (±4%), 1.35V (±4%), and 1.8V (±4%)-and is designed for core/GPIO rail supervision in TI AM26x/AM62x/TDA4 processors.
For engineers reviewing the TPS37043ZJOFDDFRQ1 datasheet, TPS37043ZJOFDDFRQ1 pinout, TPS37043ZJOFDDFRQ1 application, or TPS37043ZJOFDDFRQ1 equivalent, this page delivers verified functional safety context (ASIL-A compliant), channel-specific threshold tolerances, SOT-23-8 package constraints, and real-world ADAS/infotainment use-case validation.
Technical Context
The TPS37043ZJOFDDFRQ1 implements independent per-channel window supervision with programmable asymmetric OV/UV thresholds and built-in hysteresis (0.75% typical). Each of its three SENSE inputs connects directly to monitored rails without external resistors, leveraging internal precision dividers for ±0.25% accuracy across –40°C to +125°C.
It features fixed 10 ms reset timeout, glitch immunity ≥2 µs at 5% overdrive, and operates from 1.7 V to 6.0 V supply. All three RESET outputs are open-drain active-low, requiring external pull-ups, and support simultaneous fault detection on any channel with no shared logic dependency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Triple independent window/UV/OV supervisors - enables concurrent monitoring of three distinct power rails (e.g., core, I/O, analog). |
| Threshold Accuracy | ±0.25% typical at 25°C - ensures reliable detection within narrow supply margins common in low-voltage SoC designs. |
| Reset Delay | Fixed 10 ms - provides deterministic release timing after fault clearance, eliminating need for external RC timing components. |
| Quiescent Current | 5.5 µA typical - supports always-on monitoring in battery-sensitive automotive systems without compromising runtime. |
| Operating Temp | –40°C to +125°C (Grade 1) - qualified for under-hood and ADAS ECU environments per AEC-Q100 Rev G. |
| Output Type | Open-drain active-low (3×) - allows wired-OR reset aggregation and flexible voltage-level translation via external pull-up. |
| Hysteresis | 0.75% typical - prevents false resets due to noise or slow-rising/falling rails near trip points. |
Pinout & Package
TPS37043ZJOFDDFRQ1 uses an 8-pin SOT-23 (DDF) package measuring 1.6 mm × 2.9 mm, optimized for space-constrained automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Supply input | Primary power source (1.7–6.0 V); requires 0.1 µF bypass capacitor to GND for stability. |
| SENSE1 | Input for Channel 1 | Monitors 0.95 V rail (±4%); no external resistor needed; floating if unused. |
| SENSE2 | Input for Channel 2 | Monitors 1.35 V rail (±4%); direct connection only; decoupling optional for noisy environments. |
| SENSE3 | Input for Channel 3 | Monitors 1.8 V rail (±4%); supports rail independence - e.g., separate core, I/O, and analog supplies. |
| GND | Ground reference | Common return path for all channels and internal circuitry; must be low-impedance. |
| RESET1 | Output for Channel 1 | Active-low open-drain signal asserted when SENSE1 violates window; requires external pull-up. |
| RESET2 | Output for Channel 2 | Active-low open-drain signal asserted when SENSE2 violates window; electrically isolated from RESET1. |
| RESET3 | Output for Channel 3 | Active-low open-drain signal asserted when SENSE3 violates window; fully independent timing and assertion. |
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-compliant safety architectures without additional qualification burden. |
| Internal precision threshold resistors | Eliminates external resistor networks - reduces BOM count, improves long-term accuracy stability, and removes tolerance stacking errors in safety-critical monitoring paths. |
| Configurable per-channel detection mode | Each channel supports window, overvoltage-only, or undervoltage-only operation - allows tailoring to specific rail behavior (e.g., UV-only for backup battery, window for main SoC supply). |
| 23 selectable fixed reset delays | Includes 10 ms option used by TPS37043ZJOFDDFRQ1 - avoids timing uncertainty of RC-based delays and simplifies layout in high-reliability systems. |
| Low-noise glitch immunity | ≥2 µs immunity at 5% overdrive - prevents spurious resets from transient coupling or switching noise in dense automotive PCBs. |
Applications
| ADAS Sensor Fusion Module | Automotive Infotainment Head Unit |
|---|---|
|
Use Scenario: Real-time fusion of camera, radar, and LiDAR data in a centralized domain controller requiring synchronized power-rail integrity across multiple voltage domains. IC Role / Device Role / Timing Role: Triple-channel window supervisor independently validating 0.95V (core logic), 1.35V (interface I/O), and 1.8V (analog sensor bias) rails before enabling processor boot sequence. Use Value: Prevents corrupted sensor data or unsafe actuation due to undetected rail collapse or overvoltage - critical for ISO 26262 ASIL-B system decomposition. |
Use Scenario: Power sequencing and health monitoring in a multi-SoC infotainment platform with discrete GPU, audio DSP, and display controller ICs. IC Role / Device Role / Timing Role: Monitors dedicated 0.95V GPU core, 1.35V PCIe interface, and 1.8V display memory rails; asserts individual RESET signals to isolate faults without full system reset. Use Value: Enables graceful degradation - e.g., disabling GPU while preserving audio playback - improving perceived reliability and user experience. |
| EV Battery Management Interface | Automotive Digital Cluster |
|
Use Scenario: Supervision of isolated communication rails (CAN FD, LIN) and auxiliary MCU supplies in high-voltage battery junction boxes. IC Role / Device Role / Timing Role: Validates 0.95V microcontroller core, 1.35V CAN transceiver, and 1.8V isolated ADC reference rails; leverages ASIL-A documentation for functional safety audit traceability. Use Value: Meets ASIL-A requirements for non-safety-critical but safety-related subsystems - reducing certification effort versus custom discrete solutions. |
Use Scenario: Compact digital instrument cluster with TFT display, touch controller, and vehicle network gateway operating in tight thermal envelopes. IC Role / Device Role / Timing Role: Ensures stable 0.95V display driver, 1.35V touch interface, and 1.8V CAN gateway rails before UI initialization; uses ultra-low 5.5 µA IQ to minimize standby drain. Use Value: Extends battery-off time without compromising cold-start reliability - essential for vehicles with frequent short trips and accessory loads. |
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: 2.8V (±5%), 1.8V (±5%), 1.2V (±5%) - higher nominal voltages, wider tolerance. | Suitable for legacy 3.3V/1.8V/1.2V SoC rails; not optimized for sub-1V core domains. | Select when supervising standard I/O, memory, and older processor cores - avoid for modern low-VDD AI accelerators. |
| TLV809E26DBVRQ1 | Single-channel, 2.63V fixed UV detector; no window or OV capability; 1.6 µA IQ; SOT-23-3 package. | Limited to basic undervoltage monitoring of one rail; lacks multi-rail coordination or ASIL-A documentation. | Use only for cost-sensitive, single-rail backup systems where functional safety and window detection are unnecessary. |
Compared with TPS37043ZJOFDDFRQ1, TPS37043A4OFDDFRQ1 offers higher-voltage thresholds but lower accuracy, while TLV809E26DBVRQ1 sacrifices channel count, window functionality, and ASIL-A compliance for minimal footprint and cost - making neither a drop-in replacement.
Availability
TPS37043ZJOFDDFRQ1 is available at Aetrix Electronics and suitable for Advanced Driver Assistance Systems (ADAS), automotive infotainment head units, and EV battery management interfaces requiring stable component supply, AEC-Q100 compliance, and functional safety documentation.
Supply support for TPS37043ZJOFDDFRQ1 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-grade ICs, with decades of automotive qualification expertise and broad safety-certified product portfolios.
The TPS3704-Q1 family was developed specifically for ASIL-A-compliant multi-rail voltage supervision in next-generation automotive processors - targeting TI's AM26x, AM62x, and TDA4 platforms with integrated core, I/O, and sensor rail monitoring.
FAQ
What is the exact threshold configuration for TPS37043ZJOFDDFRQ1?
TPS37043ZJOFDDFRQ1 is factory-configured with three fixed window thresholds: SENSE1 = 0.95 V (±4%), SENSE2 = 1.35 V (±4%), and SENSE3 = 1.8 V (±4%). These values are laser-trimmed during production and do not require external resistors - ensuring ±0.25% typical accuracy across temperature and lifetime.
Does TPS37043ZJOFDDFRQ1 support window, overvoltage, and undervoltage modes per channel?
Yes, TPS37043ZJOFDDFRQ1 supports configurable detection per channel: each of the three SENSE inputs can be independently set to window, overvoltage-only, or undervoltage-only mode via internal register settings. The default configuration for TPS37043ZJOFDDFRQ1 is window mode for all three channels.
What is the reset timeout duration for TPS37043ZJOFDDFRQ1 and how is it implemented?
TPS37043ZJOFDDFRQ1 has a fixed 10 ms reset timeout, implemented using an internal oscillator-driven counter. This eliminates timing variation from external RC components and ensures consistent release behavior across temperature, voltage, and process corners - critical for deterministic boot sequences in automotive ECUs.
Is TPS37043ZJOFDDFRQ1 qualified for automotive use and what safety level does it achieve?
Yes, TPS37043ZJOFDDFRQ1 is AEC-Q100 Grade 1 qualified (–40°C to +125°C) and ASIL-A functional safety-compliant. Its development follows ISO 26262 processes, with systematic capability up to ASIL D and hardware capability certified to ASIL A - enabling use in safety-related automotive systems with documented evidence packages.
Can TPS37043ZJOFDDFRQ1 monitor voltage rails different from its VDD supply?
Yes, TPS37043ZJOFDDFRQ1 supports independent rail monitoring: SENSE1, SENSE2, and SENSE3 pins accept input voltages from 0 V to 6.0 V regardless of VDD level (1.7–6.0 V), enabling supervision of higher or lower voltage domains - such as 1.8 V I/O rails while powered from a 3.3 V supply.
TPS37043ZJOFDDFRQ1 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:
- 0.95V, 1.35V, 1.8V
- 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
TPS37043ZJOFDDFRQ1 FAQ
1.How can I place an order for TPS37043ZJOFDDFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS37043ZJOFDDFRQ1 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 TPS37043ZJOFDDFRQ1 reliable?
The price and inventory of TPS37043ZJOFDDFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS37043ZJOFDDFRQ1 is usually 5 days.
3.What payment methods are accepted for TPS37043ZJOFDDFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS37043ZJOFDDFRQ1 transactions.
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4.How is shipping managed for TPS37043ZJOFDDFRQ1?
TPS37043ZJOFDDFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS37043ZJOFDDFRQ1 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 TPS37043ZJOFDDFRQ1?
For technical support, including TPS37043ZJOFDDFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS37043ZJOFDDFRQ1 requirements.
6.How does Aetrix verify that TPS37043ZJOFDDFRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS37043ZJOFDDFRQ1 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 TPS37043ZJOFDDFRQ1 meets industry standards.
7.What is the process for return or replacement of TPS37043ZJOFDDFRQ1?
All TPS37043ZJOFDDFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS37043ZJOFDDFRQ1, 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 TPS37043ZJOFDDFRQ1 part is unused and in its original packaging.
Return procedure for TPS37043ZJOFDDFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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