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Texas Instruments TPS37042ZJOFDDFRQ1
- Part No.:
- TPS37042ZJOFDDFRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
TPS37042ZJOFDDFRQ1.pdf
- Description:
- AUTOMOTIVE MULTICHANNEL WINDOW S
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TPS37042ZJOFDDFRQ1 from Texas Instruments is an ASIL-A functional safety-compliant automotive dual-channel window voltage supervisor in an 8-pin SOT-23 (DDF) package. It monitors two independent rails-1.95 V ±4% (UV/OV) and 3.8 V ±6%-with ±0.25% typical threshold accuracy, 5.5 µA quiescent current, and 10 ms fixed reset delay. It is deployed in ADAS domain controllers to validate core and I/O supply integrity during cold cranking and load dump events.
For engineers reviewing the TPS37042ZJOFDDFRQ1 datasheet, TPS37042ZJOFDDFRQ1 pinout, TPS37042ZJOFDDFRQ1 application, or TPS37042ZJOFDDFRQ1 equivalent, key selection criteria include dual-rail window supervision capability, AEC-Q100 Grade 1 qualification (–40°C to +125°C), open-drain active-low outputs, fixed 10 ms reset timeout, and internal resistor-based threshold programming eliminating external components.
Technical Context
The TPS37042ZJOFDDFRQ1 implements independent per-channel window supervision with programmable asymmetric UV/OV tolerances (3%–11% typical), built-in 0.75% typical hysteresis, and glitch immunity of 2 µs for both overvoltage and undervoltage detection events. Its architecture integrates precision bandgap references, comparator-based threshold detection, and a digital timer block for deterministic 10 ms reset assertion.
Each channel uses dedicated SENSE pins (SENSE1, SENSE2) with no external capacitor required, and separate RESET1/RESET2 open-drain outputs requiring external pull-ups. The device operates across 1.7 V–6.0 V VDD and supports monitoring of rails other than VDD via isolated sense inputs-enabling simultaneous validation of 1.2 V core and 3.3 V I/O supplies in TI AM62x processors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Dual independent window supervisors (SENSE1 + SENSE2) |
| Threshold Accuracy | ±0.25% typical at 25°C; enables tight margin monitoring of low-voltage rails (e.g., 1.2 V, 1.8 V) |
| Window Tolerance | 1.95 V rail: ±4%; 3.8 V rail: ±6% - asymmetric tolerance support confirmed per datasheet Table 4-1 |
| Quiescent Current | 5.5 µA typical - sustains ultra-low power operation in always-on automotive modules |
| Reset Delay | Fixed 10 ms - ensures reliable system reset timing without external RC network |
| Output Type | Open-drain active-low (O suffix) - allows wired-OR reset bus configuration with external pull-up |
| Operating Temp | –40°C to +125°C (Grade 1) - qualified for under-hood and ADAS ECU environments |
Pinout & Package
Package: 8-pin SOT-23 (DDF), 1.6 mm × 2.9 mm body size, surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Supply input | Power source (1.7–6.0 V); bypassed with 0.1 µF ceramic capacitor to GND |
| SENSE1 | Voltage monitor input | Direct connection to 1.95 V rail; asserts RESET1 when outside ±4% window |
| SENSE2 | Voltage monitor input | Direct connection to 3.8 V rail; asserts RESET2 when outside ±6% window |
| GND | Ground reference | Analog and digital ground return path; must be low-impedance |
| RESET1 | Open-drain output | Active-low reset signal for SENSE1 fault; requires external pull-up resistor |
| RESET2 | Open-drain output | Active-low reset signal for SENSE2 fault; requires external pull-up resistor |
| NC | No-connect | Pins 3, 5, 6, 7 are unconnected - must remain floating per datasheet Table 5-1 |
Key Features
| Feature | Design Value |
|---|---|
| ASIL-A compliance | Functional safety development aligned with ISO 26262; systematic capability up to ASIL D, hardware capability up to ASIL A |
| Internal threshold resistors | Eliminates external resistor networks - improves accuracy, reliability, and board space efficiency for safety-critical systems |
| Configurable supervision mode | Each channel supports window, overvoltage-only, or undervoltage-only detection - enabling reuse across diverse rail types |
| Low-glitch immunity | 2 µs minimum pulse rejection on both UV and OV thresholds - prevents false resets from EMI or transient noise |
| Startup delay control | 1 ms startup delay (tSTRT) ensures stable internal biasing before valid supervision begins - critical for cold-start sequencing |
Applications
| ADAS Domain Controller | Automotive Infotainment SoC |
|---|---|
|
Use Scenario: Monitors 1.2 V core and 3.3 V I/O rails of TI TDA4VM processor during ignition sequence and thermal stress. IC Role / Device Role / Timing Role: Dual-channel window supervisor asserting independent RESET1/RESET2 signals upon rail deviation beyond ±4% or ±6% windows. Use Value: Prevents firmware execution on unstable voltage conditions; eliminates need for discrete resistor dividers and reduces BOM count by 6 components per monitored rail. |
Use Scenario: Validates power integrity of AM62x processor's DVDD (1.0 V), AVDD (1.8 V), and IOVDD (3.3 V) rails in head-unit designs. IC Role / Device Role / Timing Role: Configured as dual-window supervisor for critical 1.0 V and 3.3 V rails, with 10 ms reset hold time ensuring clean boot sequencing. Use Value: Enables single-chip supervision of multiple non-adjacent rails - reducing PCB area by >30% vs. discrete supervisor ICs. |
| HEV/EV Battery Management Interface | Body Control Module (BCM) |
|
Use Scenario: Supervises isolated 5 V auxiliary supply and 3.3 V CAN transceiver rail in high-voltage battery junction box. IC Role / Device Role / Timing Role: Uses SENSE1/SENSE2 to monitor two independent isolated domains; RESET1/RESET2 drive separate watchdog inputs. Use Value: Supports AEC-Q100 Grade 1 operation at 125°C ambient - maintains supervision fidelity in thermally constrained HV compartments. |
Use Scenario: Ensures stable 1.95 V microcontroller core rail and 3.8 V LIN transceiver rail during vehicle wake-up and sleep transitions. IC Role / Device Role / Timing Role: Window supervision with ±4% and ±6% thresholds provides margin-aware fault detection aligned with BCM power tree specs. Use Value: 5.5 µA quiescent current minimizes parasitic drain - extends battery life in parked-state applications beyond 10 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS37042A3OFDDFRQ1 | Fixed thresholds: 3.3 V ±5%, 1.2 V ±5%; same 10 ms delay, DDF package, open-drain outputs | Targeted for TI AM26x/AM62x core+IO monitoring; narrower tolerance (±5% vs ±4%/±6%) and different voltage pairs | Select when supervising standard 3.3 V/1.2 V rails instead of 1.95 V/3.8 V; identical footprint and interface |
| TLV809E29DBVRQ1 | Single-channel, fixed 2.93 V UV detector; SOT-23-3, 1.8 µA IQ, 200 ms reset delay | Lacks window supervision, dual-channel capability, and adjustable tolerance; only monitors undervoltage | Use only for cost-sensitive single-rail UV-only cases where window detection and dual channels are unnecessary |
Compared with TPS37042ZJOFDDFRQ1, TPS37042A3OFDDFRQ1 offers identical form-factor and interface but targets different rail voltages, while TLV809E29DBVRQ1 sacrifices window capability, channel count, and precision for lower cost and smaller package - making it unsuitable as a drop-in replacement.
Availability
TPS37042ZJOFDDFRQ1 is available at Aetrix Electronics and suitable for ADAS domain controllers, automotive infotainment SoCs, and HEV/EV battery management interfaces requiring stable component supply with full automotive qualification traceability.
Supply support for TPS37042ZJOFDDFRQ1 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 experience in functional safety and AEC-Q100 qualification.
The TPS3704-Q1 product line delivers ASIL-A-compliant, multi-channel window voltage supervisors optimized for real-time rail monitoring in automotive ECUs-designed to replace discrete resistor-based solutions with integrated, high-accuracy, low-power supervision.
FAQ
What is the exact voltage threshold configuration for TPS37042ZJOFDDFRQ1?
The TPS37042ZJOFDDFRQ1 is factory-configured for dual-channel window supervision: SENSE1 monitors a 1.95 V rail with ±4% tolerance (1.872 V to 2.028 V), and SENSE2 monitors a 3.8 V rail with ±6% tolerance (3.572 V to 4.028 V). These values are fixed and non-adjustable per the "Fixed" variant designation in TI's nomenclature table.
Does TPS37042ZJOFDDFRQ1 support push-pull or only open-drain outputs?
TPS37042ZJOFDDFRQ1 features open-drain active-low outputs (denoted by "O" in the part number suffix). RESET1 and RESET2 require external pull-up resistors to VDD or another logic rail. Push-pull variants exist in the TPS3704-Q1 family (e.g., "L" or "H" suffixes) but are not implemented in this specific orderable part.
Is TPS37042ZJOFDDFRQ1 qualified for automotive use and what temperature grade does it support?
Yes, TPS37042ZJOFDDFRQ1 is AEC-Q100 qualified for automotive applications and rated for Device Temperature Grade 1: –40°C to +125°C ambient operating temperature. This qualification covers HTOL, TC, UHAST, and other stress tests defined in AEC-Q100 Rev H.
Can TPS37042ZJOFDDFRQ1 monitor voltage rails different from its VDD supply?
Yes, TPS37042ZJOFDDFRQ1 supports monitoring rails independent of VDD via dedicated SENSE1 and SENSE2 inputs. For example, it can supervise a 1.95 V core rail while powered from a separate 3.3 V VDD supply - enabling flexible power tree partitioning in multi-rail automotive systems.
What is the reset timeout duration for TPS37042ZJOFDDFRQ1 and is it configurable?
The TPS37042ZJOFDDFRQ1 has a fixed 10 ms reset timeout delay (tD), as indicated by the "J" in its naming convention (per Figure 4-1). This delay is factory-programmed and non-adjustable; no external components or register writes can modify it. The delay begins after fault detection and holds RESET1/RESET2 low for the full duration.
TPS37042ZJOFDDFRQ1 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:
- 1.95V, 3.8V
- 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
TPS37042ZJOFDDFRQ1 FAQ
1.How can I place an order for TPS37042ZJOFDDFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS37042ZJOFDDFRQ1 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 TPS37042ZJOFDDFRQ1 reliable?
The price and inventory of TPS37042ZJOFDDFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS37042ZJOFDDFRQ1 is usually 5 days.
3.What payment methods are accepted for TPS37042ZJOFDDFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS37042ZJOFDDFRQ1 transactions.
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4.How is shipping managed for TPS37042ZJOFDDFRQ1?
TPS37042ZJOFDDFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS37042ZJOFDDFRQ1 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 TPS37042ZJOFDDFRQ1?
For technical support, including TPS37042ZJOFDDFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS37042ZJOFDDFRQ1 requirements.
6.How does Aetrix verify that TPS37042ZJOFDDFRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS37042ZJOFDDFRQ1 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 TPS37042ZJOFDDFRQ1 meets industry standards.
7.What is the process for return or replacement of TPS37042ZJOFDDFRQ1?
All TPS37042ZJOFDDFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS37042ZJOFDDFRQ1, 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 TPS37042ZJOFDDFRQ1 part is unused and in its original packaging.
Return procedure for TPS37042ZJOFDDFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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