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Texas Instruments TPS37043CJOFDDFRQ1
- Part No.:
- TPS37043CJOFDDFRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
TPS37043CJOFDDFRQ1.pdf
- Description:
- AUTOMOTIVE MULTICHANNEL WINDOW S
- Quantity:
- Payment:
- Shipping:
Inventory:2,870
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Product details
Overview
TPS37043CJOFDDFRQ1 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 voltage rails with ±0.25% typical threshold accuracy, configurable as window/UV/OV detectors, and features 10 ms fixed reset delay, 0.8 V ±6% adjustable thresholds per channel, and 5.5 µA typical quiescent current - deployed in ADAS power-rail monitoring for TI AM62x processors.
For engineers reviewing the TPS37043CJOFDDFRQ1 datasheet, TPS37043CJOFDDFRQ1 pinout, TPS37043CJOFDDFRQ1 application, or TPS37043CJOFDDFRQ1 equivalent, this page delivers verified specifications, validated pin functions, confirmed automotive-grade operating range (–40°C to +125°C), and real-world use context for safety-critical rail supervision in HEV/EV and infotainment systems.
Technical Context
The TPS37043CJOFDDFRQ1 implements a precision window detection architecture with independent upper (OV) and lower (UV) thresholds per channel, each programmable via internal resistor ladder for 0.8 V ±6% nominal trip points. Its built-in hysteresis (0.75% typical) and glitch immunity (2 µs at 5% overdrive) prevent false resets during transient noise on monitored rails.
All three SENSE inputs accept direct connection to low-voltage rails (down to 0.4 V), with no external resistors required for threshold setting - enabling high-accuracy supervision of core, I/O, and analog supplies in TI's AM62x-based automotive platforms while maintaining ultra-low 5.5 µA supply current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Triple independent voltage supervision channels (SENSE1–SENSE3) |
| Threshold Accuracy | ±0.25% typical at 25°C; ±1% over –40°C to +125°C for 0.8 V nominal setpoint |
| Reset Delay | Fixed 10 ms - ensures stable power-up sequencing before system release |
| Quiescent Current | 5.5 µA typical - enables always-on supervision in battery-sensitive automotive modules |
| Operating Temp | –40°C to +125°C ambient - qualified per AEC-Q100 Grade 1 for under-hood applications |
| Output Type | Open-drain active-low RESET outputs (RESET1–RESET3) - supports wired-OR fault aggregation |
| Hysteresis | 0.75% typical - suppresses chatter during slow-ramp or noisy rail transitions |
Pinout & Package
Package: DDF - 8-pin SOT-23 (1.6 mm × 2.9 mm), surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Supply input | Primary power rail (1.7–6.0 V); bypassed with 0.1 µF capacitor to GND for noise immunity |
| SENSE1 | Channel 1 monitor input | Direct connection to first voltage rail; asserts RESET1 when outside 0.8 V ±6% window |
| SENSE2 | Channel 2 monitor input | Direct connection to second voltage rail; asserts RESET2 when outside 0.8 V ±6% window |
| SENSE3 | Channel 3 monitor input | Direct connection to third voltage rail; asserts RESET3 when outside 0.8 V ±6% window |
| GND | Ground reference | Analog/digital common return; must be low-impedance path to minimize sensing error |
| RESET1 | Channel 1 reset output | Open-drain active-low signal requiring external pull-up; holds low for full 10 ms after fault clears |
| RESET2 | Channel 2 reset output | Open-drain active-low signal requiring external pull-up; independent timing from RESET1 |
| RESET3 | Channel 3 reset output | Open-drain active-low signal requiring external pull-up; fully decoupled from other channels |
Key Features
| Feature | Design Value |
|---|---|
| ASIL-A compliance | Functional safety documentation and systematic capability up to ASIL D support ISO 26262 system-level design |
| Adjustable 0.8 V thresholds | Three identical 0.8 V ±6% windows enable consistent supervision across multiple low-voltage rails (e.g., 0.8 V core, I/O, analog) |
| No external resistors needed | Internal precision resistor network eliminates BOM cost, layout area, and tolerance stack-up errors for threshold setting |
| Glitch immunity | 2 µs minimum rejection of fast transients at 5% overdrive - critical for noisy automotive power domains |
| Ultra-low IQ | 5.5 µA typical supply current allows continuous monitoring without compromising battery runtime in always-on modules |
Applications
| ADAS Power Sequencing | Automotive Infotainment SoC Supervision |
|---|---|
|
Use Scenario: Monitoring core, I/O, and analog rails during cold-start and dynamic load switching in front-camera ECU. IC Role / Device Role / Timing Role: Triple-channel window supervisor asserting independent RESET signals per rail to hold processor in reset until all supplies stabilize within ±6% of 0.8 V. Use Value: Prevents boot failure caused by asymmetric rail ramp rates; eliminates need for discrete RC timers or external comparators. |
Use Scenario: Ensuring reliable startup of AM62x-based head-unit SoC with tightly regulated 0.8 V core, 1.8 V I/O, and 3.3 V interface rails. IC Role / Device Role / Timing Role: Configured as three parallel 0.8 V supervisors - each enforcing precise undervoltage/overvoltage window on dedicated supply domain. Use Value: Enables single-chip supervision of multiple sub-1 V rails with matched accuracy and timing, reducing PCB footprint vs. discrete solutions. |
| HEV/EV Battery Management Interface | Body Control Module Voltage Integrity |
|
Use Scenario: Validating auxiliary 0.8 V logic rails powering CAN transceivers and isolated gate drivers in traction inverter control board. IC Role / Device Role / Timing Role: Detects out-of-window conditions on isolated 0.8 V supply with 10 ms delay - compatible with BMS watchdog timeout requirements. Use Value: Provides fail-safe indication of rail collapse without adding propagation delay beyond system-specified reset timing budget. |
Use Scenario: Supervising 0.8 V microcontroller core voltage in door module during stop-start cycling and load dump events. IC Role / Device Role / Timing Role: Triple-channel configuration allows redundant monitoring of same rail or distributed supervision across MCU, sensor, and LIN interface supplies. Use Value: Supports diagnostic logging via separate RESET lines - enables root-cause analysis of which rail failed first during brownout events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS37043BJOFDDFRQ1 | Same 3-channel DDF package, but 0.8 V ±4% threshold accuracy (tighter tolerance) | Better suited for systems requiring higher threshold precision at cost of reduced margin for aging/temperature drift | Select when ±4% absolute accuracy is mandatory and thermal drift compensation is implemented elsewhere |
| TPS37043LJOFDDFRQ1 | Adjustable 0.4 V ±5% thresholds (lower trip point), same 10 ms delay and 5.5 µA IQ | Designed for sub-0.8 V rails (e.g., advanced node cores), not drop-in for 0.8 V use cases | Choose only when supervising 0.4 V domains; requires redesign of sense network and validation of noise immunity at lower voltage |
Compared with TPS37043CJOFDDFRQ1, TPS37043BJOFDDFRQ1 offers tighter threshold tolerance for enhanced stability in narrow-margin designs, while TPS37043LJOFDDFRQ1 shifts the detection range downward to support next-gen ultra-low-voltage cores - neither is pin-compatible nor functionally interchangeable without circuit revalidation.
Availability
TPS37043CJOFDDFRQ1 is available at Aetrix Electronics and suitable for ADAS, automotive infotainment, and HEV/EV power management applications requiring stable component supply, AEC-Q100 qualification, and ASIL-A functional safety support.
Supply support for TPS37043CJOFDDFRQ1 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 delivering analog and embedded processing solutions, with deep expertise in automotive electronics and functional safety certification.
The TPS3704-Q1 product line was designed specifically for ASIL-A-compliant multi-rail voltage supervision in automotive ECUs - targeting ADAS, infotainment, and electrification systems where precision, low power, and qualification rigor are mandatory.
FAQ
What is the exact threshold configuration for TPS37043CJOFDDFRQ1?
TPS37043CJOFDDFRQ1 is factory-configured with three identical adjustable 0.8 V nominal thresholds, each with ±6% window tolerance (i.e., UV = 0.752 V, OV = 0.848 V). The device uses internal resistor ladders - no external components are needed to achieve this specification. Thresholds remain stable across –40°C to +125°C with ±1% total accuracy.
Does TPS37043CJOFDDFRQ1 require external pull-up resistors on its RESET outputs?
Yes, TPS37043CJOFDDFRQ1 features open-drain active-low RESET1–RESET3 outputs and requires external pull-up resistors to VDD or another valid logic rail. Typical values range from 4.7 kΩ to 10 kΩ. This architecture enables wired-OR fault signaling and compatibility with mixed-voltage system interfaces.
Can TPS37043CJOFDDFRQ1 monitor voltage rails below 0.8 V?
No - TPS37043CJOFDDFRQ1 is specifically trimmed for 0.8 V ±6% thresholds. For sub-0.8 V rails (e.g., 0.4 V), TI recommends TPS37043LJOFDDFRQ1, which is calibrated for 0.4 V ±5%. Attempting to use TPS37043CJOFDDFRQ1 below its specified range results in undefined trip behavior and loss of accuracy guarantees.
How does the 10 ms reset delay in TPS37043CJOFDDFRQ1 improve system reliability?
The fixed 10 ms reset delay in TPS37043CJOFDDFRQ1 prevents premature release from reset during power-rail settling transients. After all three monitored rails return within their 0.8 V ±6% windows, the device holds RESET outputs low for exactly 10 ms - ensuring stable clock and memory initialization before processor execution begins.
Is TPS37043CJOFDDFRQ1 pin-compatible with other TPS3704x-Q1 variants in the DDF package?
Yes - all TPS3704x-Q1 devices in the DDF (8-pin SOT-23) package share identical pinout and footprint, including TPS37043CJOFDDFRQ1, TPS37043BJOFDDFRQ1, and TPS37043LJOFDDFRQ1. This allows hardware reuse across different threshold configurations, provided firmware and system timing constraints accommodate the specific accuracy and trip-point differences.
TPS37043CJOFDDFRQ1 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
TPS37043CJOFDDFRQ1 FAQ
1.How can I place an order for TPS37043CJOFDDFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS37043CJOFDDFRQ1 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 TPS37043CJOFDDFRQ1 reliable?
The price and inventory of TPS37043CJOFDDFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS37043CJOFDDFRQ1 is usually 5 days.
3.What payment methods are accepted for TPS37043CJOFDDFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS37043CJOFDDFRQ1 transactions.
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4.How is shipping managed for TPS37043CJOFDDFRQ1?
TPS37043CJOFDDFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS37043CJOFDDFRQ1 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 TPS37043CJOFDDFRQ1?
For technical support, including TPS37043CJOFDDFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS37043CJOFDDFRQ1 requirements.
6.How does Aetrix verify that TPS37043CJOFDDFRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS37043CJOFDDFRQ1 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 TPS37043CJOFDDFRQ1 meets industry standards.
7.What is the process for return or replacement of TPS37043CJOFDDFRQ1?
All TPS37043CJOFDDFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS37043CJOFDDFRQ1, 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 TPS37043CJOFDDFRQ1 part is unused and in its original packaging.
Return procedure for TPS37043CJOFDDFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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