My Inquiry
My Account
Texas Instruments TPS37043A4OFDDFRQ1
- Part No.:
- TPS37043A4OFDDFRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
TPS37043A4OFDDFRQ1.pdf
- Description:
- AUTOMOTIVE MULTICHANNEL WINDOW S
- Quantity:
- Payment:
- Shipping:
Inventory:2,956
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS37043A4OFDDFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (–40°C to +125°C) automotive-grade triple-channel window voltage supervisor with ±0.25% typical threshold accuracy, fixed 10 ms reset delay, open-drain active-low outputs, and dedicated SENSE1/SENSE2/SENSE3 inputs for monitoring 2.8V (±5%), 1.8V (±5%), and 1.2V (±5%) rails in ADAS domain controllers. It integrates internal resistor dividers to eliminate external components and supports ASIL-A functional safety compliance.
For engineers reviewing the TPS37043A4OFDDFRQ1 datasheet, TPS37043A4OFDDFRQ1 pinout, TPS37043A4OFDDFRQ1 application, or TPS37043A4OFDDFRQ1 equivalent, key selection considerations include its triple-channel window supervision capability, fixed 10 ms delay, SOT-23-8 package footprint, automotive temperature range, and compatibility with TI AM62x/TDA4 processor power rail monitoring requirements.
Technical Context
The TPS37043A4OFDDFRQ1 implements independent per-channel window supervision using internal precision resistor networks-no external resistors required-enabling symmetric or asymmetric OV/UV thresholds. Each channel features programmable tolerance (3% to 11% typical), built-in 0.75% typical hysteresis, and glitch immunity of ≥2 µs at 5% overdrive.
It uses a bandgap-referenced comparator architecture with POR (0.7 V) and UVLO (1.4 V typical) protection, operates from 1.7 V to 6.0 V supply, and delivers ultra-low 5.5 µA typical quiescent current. The device asserts open-drain RESET1/RESET2/RESET3 outputs with VOL ≤ 300 mV at 5 mA sink, supporting direct interface to microcontroller reset inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Triple independent window supervisors (SENSE1/2/3 → RESET1/2/3) |
| Threshold Accuracy | ±0.25% typical across –40°C to +125°C; enables tight-margin rail monitoring without derating |
| Reset Delay | Fixed 10 ms; ensures stable power-up sequencing before system release |
| Supply Current | 5.5 µA typical; reduces standby power in always-on automotive modules |
| Output Type | Open-drain active-low (O); requires external pull-up; compatible with 1.8V/3.3V logic |
| Operating Temp | –40°C to +125°C (Grade 1); qualified per AEC-Q100 Rev G for under-hood applications |
| Package | SOT-23-8 (DDF, 1.6 mm × 2.9 mm); surface-mount compatible with high-density PCB layouts |
Pinout & Package
TPS37043A4OFDDFRQ1 uses the DDF (8-pin SOT-23) package with 1.6 mm × 2.9 mm body size. Pin 1 = VDD, Pin 2 = SENSE1, Pin 3 = SENSE2, Pin 4 = GND, Pin 5 = SENSE3, Pin 6 = RESET2, Pin 7 = RESET3, Pin 8 = RESET1. Pins 3, 5, 6, and 7 are NC on other variants but assigned as SENSE3 and RESET2/RESET3 in this triple-channel configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Supply input | Power source (1.7–6.0 V); bypassed with 0.1 µF capacitor to GND for noise immunity |
| SENSE1 (Pin 2) | Input monitor | Dedicated input for 2.8V ±5% rail; no external capacitor required; asserts RESET1 on fault |
| SENSE2 (Pin 3) | Input monitor | Dedicated input for 1.8V ±5% rail; asserts RESET2 on fault; floating if unused |
| GND (Pin 4) | Reference ground | Common return path for all channels; must be low-impedance connection to system ground plane |
| SENSE3 (Pin 5) | Input monitor | Dedicated input for 1.2V ±5% rail; asserts RESET3 on fault; floating if unused |
| RESET2 (Pin 6) | Output signal | Open-drain active-low output tied to SENSE2; requires external pull-up to host logic rail |
| RESET3 (Pin 7) | Output signal | Open-drain active-low output tied to SENSE3; shares same electrical specs as RESET1/2 |
| RESET1 (Pin 8) | Output signal | Open-drain active-low output tied to SENSE1; sinks up to 5 mA; VOL ≤ 300 mV at 5 mA |
Key Features
| Feature | Design Value |
|---|---|
| ASIL-A functional safety compliance | Documentation support for ISO 26262 system design; hardware capability certified to ASIL A |
| Internal threshold resistors | Eliminates external resistor network-reduces BOM count, improves long-term accuracy stability |
| Programmable window tolerance | 3% to 11% typical per channel; enables asymmetric OV/UV margins for optimized rail margining |
| Glitch immunity | ≥2 µs at 5% overdrive; prevents false resets from transient noise on monitored rails |
| Low-power operation | 5.5 µA typical IDD; enables continuous supervision in battery-backed automotive modules |
Applications
| ADAS Domain Controller Power Monitoring | Automotive Infotainment SoC Sequencing |
|---|---|
|
Use Scenario: Real-time monitoring of 2.8V camera sensor AVDD, 1.8V image signal processor IOVDD, and 1.2V core DVDD rails in a TI TDA4VM-based ADAS ECU. IC Role / Device Role / Timing Role: Triple-channel window supervisor asserting independent RESET signals to isolate faulty rails before system boot. Use Value: Prevents corrupted sensor data or lockup by detecting ±5% deviations on three critical rails simultaneously with <10 µs propagation delay. |
Use Scenario: Coordinated power-up validation of AM62x processor's 3.3V I/O, 1.8V DDR, and 1.2V core supplies in a digital cluster head unit. IC Role / Device Role / Timing Role: Single-chip solution replacing discrete supervisors; provides synchronized 10 ms reset hold time after all rails stabilize. Use Value: Reduces PCB area by 60% vs. three discrete supervisors while maintaining ±0.25% threshold accuracy across temperature. |
| HEV/EV Battery Management Interface | Automotive Body Control Module (BCM) |
|
Use Scenario: Supervision of isolated 2.8V CAN transceiver, 1.8V microcontroller I/O, and 1.2V ADC reference rails in a high-voltage battery junction box. IC Role / Device Role / Timing Role: Fault-detection interface between isolated power domains and main MCU; RESET outputs feed into safety watchdog logic. Use Value: Enables ASIL-A-compliant monitoring without external calibration; meets AEC-Q100 Grade 1 thermal requirements for under-hood placement. |
Use Scenario: Monitoring 2.8V lighting driver, 1.8V LIN transceiver, and 1.2V EEPROM supply in a multi-zone BCM controlling door modules and ambient lighting. IC Role / Device Role / Timing Role: Centralized rail health monitor triggering graceful shutdown via MCU interrupt on any channel fault. Use Value: Eliminates need for three separate voltage detectors-lowers total cost by $0.18/unit and simplifies layout routing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS37043A5OFDDFRQ1 | Same triple-channel fixed-window architecture; thresholds: 3.3V (±4%), 1.8V (±4%), 1.2V (±4%) | Targets higher-voltage I/O rails (3.3V) instead of 2.8V sensor rail; tighter ±4% tolerance | Select when supervising 3.3V/1.8V/1.2V rails with enhanced accuracy; not drop-in for 2.8V systems |
| TPS37042A3OFDDFRQ1 | Dual-channel variant; thresholds: 3.3V (±5%), 1.2V (±5%); 10 ms delay; same SOT-23-8 package | Lacks third channel (SENSE3/RESET3); unsuitable for triple-rail monitoring | Use only if system has exactly two critical rails; requires PCB redesign to repurpose unused pins |
Compared with TPS37043A4OFDDFRQ1, TPS37043A5OFDDFRQ1 offers improved threshold accuracy on the highest rail but mismatches the 2.8V requirement, while TPS37042A3OFDDFRQ1 reduces channel count-neither is pin-compatible, and both require schematic and layout revision for substitution.
Availability
TPS37043A4OFDDFRQ1 is available at Aetrix Electronics and suitable for ADAS domain controllers, automotive infotainment systems, and HEV/EV battery management units requiring stable component supply with full automotive qualification and traceable sourcing.
Supply support for TPS37043A4OFDDFRQ1 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 ICs, with decades of experience in functional safety and AEC-Q100-qualified products.
The TPS3704-Q1 family was designed specifically for automotive power rail supervision in ASIL-A systems, targeting ADAS, infotainment, and electrified vehicle platforms where precision, reliability, and small form factor are critical.
FAQ
What is the exact threshold voltage configuration for TPS37043A4OFDDFRQ1?
TPS37043A4OFDDFRQ1 is factory-configured for triple-channel window supervision with fixed thresholds: SENSE1 monitors 2.8V ±5%, SENSE2 monitors 1.8V ±5%, and SENSE3 monitors 1.2V ±5%. These values are laser-trimmed during production and do not require external resistors or programming. The ±5% tolerance is symmetric and applies across the full –40°C to +125°C operating range.
Does TPS37043A4OFDDFRQ1 support push-pull outputs?
No, TPS37043A4OFDDFRQ1 uses open-drain active-low outputs (RESET1/RESET2/RESET3) only. Its orderable part number suffix "O" explicitly denotes Open Drain-per TI's device nomenclature in Figure 4-1. Push-pull variants (e.g., "L" or "H") exist in the TPS3704-Q1 family but are distinct part numbers; this device requires external pull-up resistors on each RESET line.
Can TPS37043A4OFDDFRQ1 monitor voltages below 1.2V?
No-TPS37043A4OFDDFRQ1 is fixed to 2.8V/1.8V/1.2V thresholds and cannot be reconfigured. While the broader TPS3704-Q1 family supports adjustable versions down to 0.4V (e.g., TPS37043LJOFDDFRQ1), this specific variant has hard-coded thresholds. For sub-1.2V supervision, TI recommends TPS37043ZJOFDDFRQ1 (0.95V/1.35V/1.8V) or adjustable variants.
Is TPS37043A4OFDDFRQ1 pin-compatible with other TPS3704x-Q1 variants in SOT-23-8?
Yes-TPS37043A4OFDDFRQ1 shares identical pinout and package (DDF, SOT-23-8) with all TPS3704x-Q1 variants, including dual- and quad-channel versions. Pin assignments for VDD, GND, SENSE1–3, and RESET1–3 are consistent across the family per Figures 5-1 through 5-4 and Table 5-1. Unused pins (e.g., SENSE4 on quad variants) are NC on this triple-channel part.
What functional safety documentation is provided for TPS37043A4OFDDFRQ1?
TI provides ISO 26262-ready documentation for TPS37043A4OFDDFRQ1, including FMEDA reports, safety manuals, and diagnostic coverage analysis supporting ASIL-A system integration. Hardware capability is rated ASIL A; systematic capability extends to ASIL D. All documents are accessible via TI's TPS3704-Q1 product folder under "Functional Safety Resources".
TPS37043A4OFDDFRQ1 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:
- 3
- Voltage - Threshold:
- 1.2V, 1.8V, 2.8V
- 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
TPS37043A4OFDDFRQ1 FAQ
1.How can I place an order for TPS37043A4OFDDFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS37043A4OFDDFRQ1 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 TPS37043A4OFDDFRQ1 reliable?
The price and inventory of TPS37043A4OFDDFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS37043A4OFDDFRQ1 is usually 5 days.
3.What payment methods are accepted for TPS37043A4OFDDFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS37043A4OFDDFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS37043A4OFDDFRQ1?
TPS37043A4OFDDFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS37043A4OFDDFRQ1 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 TPS37043A4OFDDFRQ1?
For technical support, including TPS37043A4OFDDFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS37043A4OFDDFRQ1 requirements.
6.How does Aetrix verify that TPS37043A4OFDDFRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS37043A4OFDDFRQ1 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 TPS37043A4OFDDFRQ1 meets industry standards.
7.What is the process for return or replacement of TPS37043A4OFDDFRQ1?
All TPS37043A4OFDDFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS37043A4OFDDFRQ1, 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 TPS37043A4OFDDFRQ1 part is unused and in its original packaging.
Return procedure for TPS37043A4OFDDFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS37043A4OFDDFRQ1 Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
