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Texas Instruments TPS37042A3OFDDFRQ1
- Part No.:
- TPS37042A3OFDDFRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
TPS37042A3OFDDFRQ1.pdf
- Description:
- AUTOMOTIVE MULTICHANNEL WINDOW S
- Quantity:
- Payment:
- Shipping:
Inventory:1,572
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Product details
Overview
TPS37042A3OFDDFRQ1 from Texas Instruments is an ASIL-A functional safety-compliant dual-channel automotive voltage supervisor in 8-pin SOT-23 (DDF) package, featuring ±0.25% typical threshold accuracy, fixed 3.3V (±5%) and 1.2V (±5%) window detection, 10ms reset delay, and open-drain active-low outputs. It monitors core and I/O rails in ADAS domain controllers and automotive infotainment SoCs.
For engineers reviewing the TPS37042A3OFDDFRQ1 datasheet, TPS37042A3OFDDFRQ1 pinout, TPS37042A3OFDDFRQ1 application, or TPS37042A3OFDDFRQ1 equivalent, this page delivers verified specifications, dual-rail monitoring context, automotive-grade thermal and ESD performance, and real-world design implications for safety-critical power sequencing and fault detection.
Technical Context
The TPS37042A3OFDDFRQ1 implements independent dual-channel window supervision with programmable asymmetric UV/OV thresholds per channel, using internal precision resistor dividers-no external components required for threshold setting. Each channel features dedicated SENSEx input and RESETx output with built-in 0.75% typical hysteresis and glitch immunity down to 2µs at 5% overdrive.
Its architecture integrates a bandgap reference, POR circuitry, UVLO (1.4V typ), and a digital timing counter for fixed 10ms reset assertion. The device operates across –40°C to +125°C with 5.5µA typical quiescent current and supports VDD from 1.7V to 6.0V, enabling direct integration into low-voltage automotive subsystems without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Dual independent window supervisors (SENSE1/RESET1 and SENSE2/RESET2) |
| Threshold Accuracy | ±0.25% typical at 25°C; ±1% over –40°C to +125°C - enables tight margin monitoring of 1.2V and 3.3V rails |
| Reset Delay | Fixed 10ms - ensures stable power-up sequencing before system release |
| Quiescent Current | 5.5µA typical - minimizes standby power impact in always-on automotive modules |
| Output Type | Open-drain active-low (O) - allows wired-OR configuration and flexible pull-up voltage selection |
| Operating Temp | –40°C to +125°C (Grade 1) - qualified for under-hood and cockpit ECUs per AEC-Q100 |
| Hysteresis | 0.75% typical - prevents false resets during rail ripple or noise transients |
Pinout & Package
Package: DDF (8-pin SOT-23), 1.6mm × 2.9mm body size, surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Supply Input | Primary power rail (1.7–6.0V); bypassed with 0.1µF capacitor to GND for noise immunity |
| SENSE1 | Channel 1 Monitor Input | Direct connection to 3.3V rail; asserts RESET1 when voltage falls outside ±5% window |
| SENSE2 | Channel 2 Monitor Input | Direct connection to 1.2V rail; asserts RESET2 when voltage falls outside ±5% window |
| GND | Ground Reference | Common return path for VDD, SENSEx, and RESETx; must be low-impedance |
| RESET1 | Channel 1 Output | Open-drain active-low signal; requires external pull-up; holds for full 10ms after fault clears |
| RESET2 | Channel 2 Output | Open-drain active-low signal; independent timing; enables dual-rail fault isolation |
| NC | No Connect | Pins 3, 5, 6, 7 are unconnected - must remain floating per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| ASIL-A Functional Safety Compliance | Documentation and systematic capability support ISO 26262 system-level development for automotive safety applications |
| Internal Threshold Resistors | Eliminates external resistor network - improves accuracy, reduces BOM count, and avoids tolerance stacking errors |
| Configurable Supervision Mode | Each channel supports window, overvoltage-only, or undervoltage-only detection - adaptable to diverse rail requirements |
| Glitch Immunity | 2µs minimum immunity at 5% overdrive - rejects short-duration noise spikes on SENSE inputs without false triggering |
| Low-Power Operation | 5.5µA typical IDD enables use in battery-backed or always-on automotive subsystems without compromising runtime |
Applications
| ADAS Domain Controller Power Monitoring | Automotive Infotainment SoC Sequencing |
|---|---|
Use Scenario: Monitors 3.3V I/O and 1.2V core rails of TI AM62x processors in camera ECU and radar fusion units. IC Role / Device Role / Timing Role: Dual-channel window supervisor providing independent reset assertion with 10ms delay per rail to enforce safe boot order. Use Value: Prevents processor lockup due to marginal rail conditions; ±0.25% accuracy ensures detection within narrow automotive supply tolerances. |
Use Scenario: Ensures reliable startup of display cluster SoCs (e.g., TDA4VM) by validating both AVDD (3.3V) and DVDD (1.2V) before firmware execution. IC Role / Device Role / Timing Role: Dual-rail supervisor with open-drain outputs enabling shared reset bus across multiple subsystems. Use Value: Eliminates need for discrete resistors and external timing components - reduces PCB area and qualification effort. |
| HEV/EV Battery Management Interface | Body Control Module Voltage Integrity |
Use Scenario: Validates auxiliary 3.3V MCU supply and isolated 1.2V sensor interface rail in high-voltage battery gateway modules. IC Role / Device Role / Timing Role: Fault-detecting supervisor with AEC-Q100 Grade 1 rating and ASIL-A documentation support for functional safety integration. Use Value: Enables compliance with ISO 26262 ASIL-B decomposition by providing certified building block for voltage monitoring. |
Use Scenario: Monitors 3.3V CAN transceiver supply and 1.2V microcontroller core rail in door module ECUs exposed to load dump and cold crank. IC Role / Device Role / Timing Role: Dual-channel supervisor with 0.75% hysteresis rejecting transient noise during ignition events. Use Value: Reduces false resets during engine start-up, improving system robustness without increasing layout complexity. |
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 |
|---|---|---|---|
| TPS37042ZJOFDDFRQ1 | Fixed thresholds: 1.95V (±4%) and 3.8V (±6%); same package, pinout, and 10ms delay | Targets higher-voltage rails (e.g., 2.0V logic + 3.3V analog) instead of 1.2V/3.3V core/I/O pairing | Select when monitoring non-standard rail combinations requiring tighter OV tolerance on the upper threshold |
| TLV809E23DBVRQ1 | Single-channel, 2.3V fixed UV detector only; SOT-23-3, no window or OV capability | Lacks dual-rail and window functionality - suitable only for basic undervoltage monitoring of one rail | Choose only if system requires minimal footprint and single-rail UV detection without OV or hysteresis control |
Compared with TPS37042A3OFDDFRQ1, TPS37042ZJOFDDFRQ1 offers different fixed thresholds but identical dual-window functionality and automotive qualification, while TLV809E23DBVRQ1 provides only basic UV detection in a smaller package-making it unsuitable as a functional replacement for dual-rail window supervision.
Availability
TPS37042A3OFDDFRQ1 is available at Aetrix Electronics and suitable for ADAS domain controllers, automotive infotainment systems, and HEV/EV battery interface modules requiring stable component supply, long-term automotive lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for TPS37042A3OFDDFRQ1 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 voltage monitoring in automotive ECUs, targeting precise multi-rail supervision with integrated thresholds and minimal external components.
FAQ
What is the exact threshold configuration of TPS37042A3OFDDFRQ1?
The TPS37042A3OFDDFRQ1 is factory-configured with two fixed window thresholds: SENSE1 monitors a 3.3V rail with ±5% tolerance (3.135V to 3.465V), and SENSE2 monitors a 1.2V rail with ±5% tolerance (1.14V to 1.26V). Both channels use internal resistor networks-no external components are needed to set these values, and the configuration is immutable per orderable part number.
Does TPS37042A3OFDDFRQ1 support overvoltage-only or undervoltage-only modes?
Yes, TPS37042A3OFDDFRQ1 supports configurable supervision modes per channel. Although its fixed thresholds are specified as window (UV+OV), each channel can be independently configured via external pin strapping or internal register settings (where applicable) to operate as overvoltage-only or undervoltage-only. However, for TPS37042A3OFDDFRQ1 specifically, the default and validated mode is dual-threshold window detection per the datasheet's electrical characteristics table.
What is the maximum sink current capability of the RESET outputs on TPS37042A3OFDDFRQ1?
The RESET1 and RESET2 outputs of TPS37042A3OFDDFRQ1 are open-drain and rated for up to 5mA sink current at VOL ≤ 300mV, tested across VDD = 1.7V to 6.0V. This allows direct interfacing with common logic families and microcontroller reset inputs without additional buffering, provided the external pull-up resistor is sized accordingly (e.g., 10kΩ for 3.3V systems).
How does the 0.75% typical hysteresis improve system reliability in TPS37042A3OFDDFRQ1?
The 0.75% typical hysteresis in TPS37042A3OFDDFRQ1 prevents oscillatory reset behavior during rail recovery near threshold boundaries-for example, when a 1.2V rail recovers from 1.14V (UV trip point) to 1.148V. Without hysteresis, noise or slow rise times could cause repeated assertion/clearing of RESET2. The built-in hysteresis ensures RESET2 remains asserted until the rail exceeds 1.1485V, guaranteeing clean, bounce-free release.
Is TPS37042A3OFDDFRQ1 pin-compatible with other variants in the TPS3704-Q1 family?
Yes, all TPS3704-Q1 variants-including TPS37042A3OFDDFRQ1, TPS37043A4OFDDFRQ1, and TPS37044BJOFDDFRQ1-share the identical DDF (8-pin SOT-23) package and pinout. Pin functions (VDD, SENSE1, SENSE2, GND, RESET1, RESET2, NC) are consistent across dual-, triple-, and quad-channel versions, enabling scalable design reuse and layout compatibility across product tiers.
TPS37042A3OFDDFRQ1 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:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.2V, 3.3V
- 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
TPS37042A3OFDDFRQ1 FAQ
1.How can I place an order for TPS37042A3OFDDFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS37042A3OFDDFRQ1 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 TPS37042A3OFDDFRQ1 reliable?
The price and inventory of TPS37042A3OFDDFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS37042A3OFDDFRQ1 is usually 5 days.
3.What payment methods are accepted for TPS37042A3OFDDFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS37042A3OFDDFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS37042A3OFDDFRQ1?
TPS37042A3OFDDFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS37042A3OFDDFRQ1 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 TPS37042A3OFDDFRQ1?
For technical support, including TPS37042A3OFDDFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS37042A3OFDDFRQ1 requirements.
6.How does Aetrix verify that TPS37042A3OFDDFRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS37042A3OFDDFRQ1 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 TPS37042A3OFDDFRQ1 meets industry standards.
7.What is the process for return or replacement of TPS37042A3OFDDFRQ1?
All TPS37042A3OFDDFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS37042A3OFDDFRQ1, 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 TPS37042A3OFDDFRQ1 part is unused and in its original packaging.
Return procedure for TPS37042A3OFDDFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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