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Texas Instruments TPS37043CPOFDDFRQ1
- Part No.:
- TPS37043CPOFDDFRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
TPS37043CPOFDDFRQ1.pdf
- Description:
- AUTOMOTIVE MULTICHANNEL WINDOW S
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TPS37043CPOFDDFRQ1 from Texas Instruments is an ASIL-A functional safety-compliant automotive triple-channel window voltage supervisor in an 8-pin SOT-23 (DDF) package. It monitors three independent rails-3.3V (±4%), 0.75V (±4%), and 0.8V (±3%)-with ±0.25% typical threshold accuracy, 10ms fixed reset delay, and open-drain active-low outputs. It enables precise core/GPIO rail supervision in TI AM62x/TDA4-based ADAS systems.
For engineers reviewing the TPS37043CPOFDDFRQ1 datasheet, TPS37043CPOFDDFRQ1 pinout, TPS37043CPOFDDFRQ1 application, or TPS37043CPOFDDFRQ1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (–40°C to +125°C), adjustable/fixed threshold flexibility per channel, built-in hysteresis (0.75% typical), and ultra-low 5.5µA quiescent current for battery-sensitive automotive subsystems.
Technical Context
The TPS37043CPOFDDFRQ1 implements independent per-channel window supervision with programmable asymmetric OV/UV tolerances (3%–11% typical), using internal precision resistor dividers-eliminating external components for threshold setting. Its architecture integrates bandgap reference, comparator pairs per sense input, and a digital timing counter for deterministic 10ms reset assertion after fault detection.
Each of its three SENSE inputs accepts rail voltages from 0.4V to 5.55V, supports direct connection without external capacitors (10nF–100nF optional for noise immunity), and features glitch immunity ≥2µs at 5% overdrive. The device asserts open-drain RESET outputs only when the monitored voltage falls outside the configured window, with propagation delay ≤10µs and built-in hysteresis preventing false trips during marginal supply conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Triple independent window/UV/OV supervisors with fully configurable thresholds per channel |
| Threshold Accuracy | ±0.25% typical across –40°C to +125°C-enables reliable monitoring of low-margin rails like 1.2V core or 0.8V I/O |
| Reset Delay | Fixed 10ms-ensures stable power-up sequencing before system release in automotive microcontrollers |
| Quiescent Current | 5.5µA typical-minimizes standby power draw in always-on vehicle domains (e.g., body control modules) |
| Operating Temp | –40°C to +125°C (Grade 1)-certified for under-hood and infotainment applications per AEC-Q100 |
| Output Type | Open-drain active-low RESET outputs-supports wired-OR logic and flexible pull-up voltage selection (1.7V–6.0V) |
| Hysteresis | 0.75% typical-prevents oscillatory reset assertion near threshold boundaries in noisy automotive environments |
Pinout & Package
Package: 8-pin SOT-23 (DDF), 1.6mm × 2.9mm body size, surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Supply Input | 1.7V–6.0V main power rail; requires 0.1µF bypass capacitor to GND for noise suppression |
| SENSE1 | Monitor Input | Direct connection to first monitored rail (3.3V ±4%); no external components needed |
| SENSE2 | Monitor Input | Direct connection to second monitored rail (0.75V ±4%); supports low-voltage core rail supervision |
| GND | Ground Reference | Common return path for all analog and digital circuitry; must be low-impedance |
| RESET1 | Output | Active-low open-drain reset signal for SENSE1 fault; requires external pull-up resistor |
| RESET2 | Output | Active-low open-drain reset signal for SENSE2 fault; electrically isolated from RESET1 |
| RESET3 | Output | Active-low open-drain reset signal for SENSE3 fault (0.8V ±3%); enables independent fault signaling |
| SENSE3 | Monitor Input | Direct connection to third monitored rail (0.8V ±3%); optimized for sub-1V I/O or memory rails |
Key Features
| Feature | Design Value |
|---|---|
| ASIL-A Functional Safety Compliance | Documentation and systematic capability support ISO 26262 system-level design up to ASIL D, with hardware capability certified to ASIL A |
| Internal Threshold Resistors | Eliminates need for external resistor networks-reduces BOM count, improves accuracy, and enhances reliability in safety-critical paths |
| Configurable Supervision Mode | Each channel independently set as window, overvoltage-only, or undervoltage-only-enables mixed-rail monitoring on single IC |
| Adjustable/Fixed Hybrid Thresholds | Combines factory-trimmed fixed thresholds (3.3V/0.75V/0.8V) with option to use external resistors on SENSE pins for custom values |
| Low-Voltage Sensing Resolution | 20mV step resolution for thresholds ≤0.8V-critical for accurate monitoring of modern sub-1V processor I/O rails |
Applications
| ADAS Camera Module Power Sequencing | Automotive Infotainment SoC Monitoring |
|---|---|
Use Scenario: Simultaneous supervision of image sensor AVDD (3.3V), IOVDD (0.8V), and DVDD (0.75V) rails in FPD-Link III camera systems. IC Role / Device Role / Timing Role: Triple-channel window supervisor asserting independent RESET signals per rail violation to prevent corrupted frame capture or sensor lockup. Use Value: Prevents field failures caused by marginal rail collapse during thermal stress or ESD events, leveraging ±0.25% accuracy and 10ms deterministic reset hold time. | Use Scenario: Monitoring core (0.75V), GPU I/O (0.8V), and peripheral (3.3V) rails of AM62x-based head-unit SoCs. IC Role / Device Role / Timing Role: Fault-detection engine providing early warning and controlled reset initiation before SoC brownout or latch-up occurs. Use Value: Enables safe firmware recovery via independent RESET lines-avoiding cascaded failure across subsystems due to shared reset propagation. |
| EV Battery Management Interface | Automotive Body Control Unit (BCU) |
Use Scenario: Supervising isolated communication rails (3.3V), MCU core (0.75V), and CAN transceiver I/O (0.8V) in high-voltage battery junction boxes. IC Role / Device Role / Timing Role: Safety-critical voltage monitor interfacing with ASIL-B MCU via dedicated RESET outputs to trigger diagnostic routines. Use Value: Meets ASIL-A requirements with documented functional safety analysis, enabling integration into ISO 26262-compliant BMS architectures. | Use Scenario: Monitoring 3.3V microcontroller supply, 0.8V LIN transceiver bias, and 0.75V EEPROM interface rails in door module ECUs. IC Role / Device Role / Timing Role: Low-power rail supervisor maintaining system integrity during stop-start cycles with 5.5µA IQ and Grade 1 temperature range. Use Value: Extends battery life in always-on modules while ensuring reliable wake-up and fault reporting under cold-cranking conditions (–40°C). |
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%); same 10ms delay, open-drain outputs, DDF package | Targets higher-voltage rails (e.g., legacy MCU cores, analog supplies); lacks sub-1V capability | Select when supervising 1.2V+ rails without need for 0.75V/0.8V precision; identical footprint and timing |
| TLV809E26DBVRQ1 | Single-channel, fixed 2.63V threshold, 200ms delay, SOT-23-3 package, ±2% accuracy | Only monitors one rail; insufficient for multi-rail SoC supervision; lower accuracy and no window mode | Use only for simple single-rail backup monitoring where cost and size outweigh precision and channel count requirements |
Compared with TPS37043CPOFDDFRQ1, TPS37043A4OFDDFRQ1 offers matching triple-channel architecture and AEC-Q100 Grade 1 qualification but targets higher-voltage rails, whereas TLV809E26DBVRQ1 is a cost-optimized single-rail solution lacking window supervision, sub-1V support, and ASIL-A compliance-making it unsuitable for SoC-level monitoring.
Availability
TPS37043CPOFDDFRQ1 is available at Aetrix Electronics and suitable for Advanced Driver Assistance Systems (ADAS), automotive infotainment platforms, and EV battery interface modules requiring stable component supply, long-term automotive lifecycle support, and functional safety documentation.
Supply support for TPS37043CPOFDDFRQ1 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 company delivering analog and embedded processing solutions for automotive, industrial, and personal electronics markets.
The TPS3704-Q1 product line delivers ASIL-A-compliant, multi-channel precision voltage supervisors designed specifically for automotive SoC power integrity monitoring-including core, I/O, and interface rail supervision in ADAS, infotainment, and electrification systems.
FAQ
What is the exact threshold configuration for each channel of the TPS37043CPOFDDFRQ1?
The TPS37043CPOFDDFRQ1 is factory-configured with three fixed thresholds: SENSE1 = 3.3V (±4%), SENSE2 = 0.75V (±4%), and SENSE3 = 0.8V (±3%). Each channel operates in window mode by default, detecting both overvoltage and undervoltage faults relative to its respective threshold and tolerance band. External resistor dividers may be added to any SENSE pin for custom voltage settings, preserving the device's ±0.25% base accuracy.
Does the TPS37043CPOFDDFRQ1 require external pull-up resistors on its RESET outputs?
Yes, the TPS37043CPOFDDFRQ1 uses open-drain active-low RESET outputs (RESET1, RESET2, RESET3), which require external pull-up resistors to a valid logic-high voltage (1.7V–6.0V). Typical values range from 4.7kΩ to 10kΩ depending on bus capacitance and rise-time requirements. Pull-ups must be placed close to the RESET pins to minimize noise coupling and ensure clean signal transitions.
How does the TPS37043CPOFDDFRQ1 achieve ASIL-A compliance?
The TPS37043CPOFDDFRQ1 achieves ASIL-A compliance through documented functional safety development processes aligned with ISO 26262, including systematic capability evidence up to ASIL D and hardware metrics validated for ASIL A. It provides safety-related documentation (FMEDA, safety manual), built-in diagnostics (POR, UVLO), and robust design against single-point faults-enabling its use in safety elements out of context within larger ASIL-B/C systems.
Can the TPS37043CPOFDDFRQ1 monitor voltages below 0.75V?
Yes-the TPS37043CPOFDDFRQ1 supports input voltages from 0V to 6.0V on all SENSE pins, with guaranteed operation down to 0.4V. Its threshold programming range extends from 0.4V to 5.55V, and for thresholds ≤0.8V, it provides 20mV step resolution. While the factory-set SENSE2 and SENSE3 thresholds are 0.75V and 0.8V respectively, users may configure lower values using external resistor dividers per the datasheet's Adjustable Voltage Thresholds section.
What is the maximum operating voltage for VDD and SENSE inputs on the TPS37043CPOFDDFRQ1?
The absolute maximum rating for both VDD and all SENSE inputs (SENSE1–SENSE3) is 6.5V, but the recommended operating range is 1.7V to 6.0V for VDD and 0V to 6.0V for SENSE pins. Exceeding 6.0V continuously risks violating recommended conditions and may impact long-term reliability-even though the absolute rating allows brief transients up to 6.5V.
TPS37043CPOFDDFRQ1 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:
- 0.75V, 3.3V, Adj
- 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
TPS37043CPOFDDFRQ1 FAQ
1.How can I place an order for TPS37043CPOFDDFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS37043CPOFDDFRQ1 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 TPS37043CPOFDDFRQ1 reliable?
The price and inventory of TPS37043CPOFDDFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS37043CPOFDDFRQ1 is usually 5 days.
3.What payment methods are accepted for TPS37043CPOFDDFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS37043CPOFDDFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS37043CPOFDDFRQ1?
TPS37043CPOFDDFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS37043CPOFDDFRQ1 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 TPS37043CPOFDDFRQ1?
For technical support, including TPS37043CPOFDDFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS37043CPOFDDFRQ1 requirements.
6.How does Aetrix verify that TPS37043CPOFDDFRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS37043CPOFDDFRQ1 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 TPS37043CPOFDDFRQ1 meets industry standards.
7.What is the process for return or replacement of TPS37043CPOFDDFRQ1?
All TPS37043CPOFDDFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS37043CPOFDDFRQ1, 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 TPS37043CPOFDDFRQ1 part is unused and in its original packaging.
Return procedure for TPS37043CPOFDDFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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