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Texas Instruments TPS3306-15QDRG4Q1
- Part No.:
- TPS3306-15QDRG4Q1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS3306-15QDRG4Q1.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,561
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Product details
Overview
TPS3306-15QDRG4Q1 from Texas Instruments is an automotive-grade dual voltage supervisory IC that monitors 3.3 V and 1.5 V supply rails, provides a 100-ms power-on reset with defined output down to VDD ≥ 1.1 V, integrates a 0.8-s watchdog timer, and delivers open-drain RESET and PFO outputs for DSP and microcontroller-based systems in harsh environments.
For engineers reviewing the TPS3306-15QDRG4Q1 datasheet, TPS3306-15QDRG4Q1 pinout, TPS3306-15QDRG4Q1 application, or TPS3306-15QDRG4Q1 equivalent, key selection criteria include dual-threshold supervision (2.93 V / 1.4 V), −40°C to 125°C operation, SOIC-8 packaging, low 15 µA supply current, and integrated power-fail detection with 1.25 V reference.
Technical Context
The TPS3306-15QDRG4Q1 implements two independent voltage comparators with fixed thresholds (2.93 V for SENSE1, 1.4 V for SENSE2), hysteresis of 15 mV per input, and internal logic that asserts active-low RESET until both sensed voltages exceed their respective VIT and remain stable for 100 ms. It includes a dedicated PFI comparator referenced to 1.25 V with 10 mV hysteresis and an open-drain PFO output.
A separate watchdog circuit monitors WDI transitions with a nominal 0.8-s timeout; either rising or falling edge resets the timer. The device uses an internal oscillator and timer block to generate precise delay timing without external components, and RESET remains asserted during VDD < 1.1 V regardless of SENSE inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 6 V - supports wide-input industrial and automotive power rails including 3.3 V and 5 V systems. |
| SENSE1 Threshold (VIT1) | 2.93 V (typ) - precisely monitors 3.3 V nominal rail with ±3% tolerance over temperature. |
| SENSE2 Threshold (VIT2) | 1.4 V (typ) - targets 1.5 V core supplies in DSP/microcontroller applications. |
| Power-On Reset Assertion | Defined down to VDD ≥ 1.1 V - ensures reliable reset initiation even during brown-out conditions. |
| Reset Delay Time (td) | 100 ms (typ) - guarantees sufficient system stabilization before release of RESET signal. |
| Watchdog Timeout (tt(out)) | 0.8 s (typ) - provides robust program execution monitoring for safety-critical firmware loops. |
| Supply Current (IDD) | 15 µA (typ) - enables long battery life in portable and always-on automotive modules. |
| Operating Temperature | −40°C to 125°C - qualified per AEC-Q100 for under-hood and infotainment applications. |
Pinout & Package
TPS3306-15QDRG4Q1 is housed in an 8-pin SOIC (D) package with 1.27 mm pitch, 3.9 mm width, and 1.75 mm max height, compliant with JEDEC MS-012 variation AA and RoHS requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SENSE1 (Pin 1) | Voltage sense input 1 | Monitors 3.3 V rail; asserts RESET if voltage drops below 2.93 V (typ) with 15 mV hysteresis. |
| SENSE2 (Pin 2) | Voltage sense input 2 | Monitors 1.5 V rail; asserts RESET if voltage drops below 1.4 V (typ) with 15 mV hysteresis. |
| PFI (Pin 3) | Power-fail comparator input | Compares external voltage against 1.25 V internal reference for auxiliary supply or battery monitoring. |
| GND (Pin 4) | Ground reference | Common return path for all analog and digital functions; requires low-impedance PCB connection. |
| RESET (Pin 5) | Active-low open-drain reset output | Drives microcontroller /DSP reset line; requires external pull-up to VDD or host supply. |
| PFO (Pin 6) | Active-low open-drain power-fail output | Signals low-battery or secondary supply failure; independently controlled from RESET. |
| WDI (Pin 7) | Watchdog timer input | Edge-triggered input; toggling within 0.8 s prevents watchdog timeout and RESET assertion. |
| VDD (Pin 8) | Positive supply input | Primary power source (2.7–6 V); powers internal comparators, timers, and logic blocks. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage supervision | Simultaneously monitors 3.3 V and 1.5 V rails with fixed, factory-trimmed thresholds (2.93 V / 1.4 V). |
| Automotive-qualified operation | Rated for −40°C to 125°C ambient and qualified per AEC-Q100, enabling use in engine control and ADAS modules. |
| Integrated 0.8-s watchdog timer | Eliminates need for external timing components; configurable via WDI edge detection without software overhead. |
| Power-fail comparator with 1.25 V reference | Enables flexible monitoring of any voltage >1.25 V using external resistor divider; supports battery health diagnostics. |
| Low quiescent current | 15 µA typical supply current allows integration into always-on vehicle subsystems without compromising battery runtime. |
| Robust reset behavior | Guaranteed RESET assertion at VDD ≥ 1.1 V and clean 100-ms delay ensures deterministic system initialization. |
Applications
| Engine Control Unit (ECU) | Infotainment Head Unit |
|---|---|
|
Use Scenario: Monitors main 5 V and 3.3 V domain supplies alongside 1.5 V DSP core voltage during cold cranking and load dump events. IC Role / Device Role / Timing Role: Dual-supply supervisor ensuring synchronized reset of MCU, CAN transceivers, and audio DSP upon undervoltage recovery. Use Value: Prevents erratic ECU boot behavior by enforcing 100-ms minimum reset hold time and validating both rails before release. |
Use Scenario: Supervises 3.3 V SoC I/O supply and 1.5 V GPU core voltage while detecting backup battery depletion in navigation systems. IC Role / Device Role / Timing Role: Provides independent RESET and PFO signals to trigger graceful shutdown and UI warnings prior to power loss. Use Value: Enables safe state preservation using PFO-driven interrupt and avoids data corruption via precise dual-rail validation before boot. |
| Advanced Driver Assistance System (ADAS) Camera Module | Telematics Control Unit (TCU) |
|
Use Scenario: Ensures reliable startup of image sensor interface and ISP processor after ignition, while monitoring 1.5 V MIPI PHY supply. IC Role / Device Role / Timing Role: Dual-voltage supervisor with watchdog guarding real-time vision processing firmware against lockup. Use Value: Eliminates need for external RC reset circuits and reduces BOM count while maintaining ASIL-B compatible supervision. |
Use Scenario: Manages power sequencing for LTE modem, GNSS receiver, and secure MCU across multiple voltage domains in connected vehicle gateways. IC Role / Device Role / Timing Role: Coordinates reset timing between cellular baseband and application processor; detects modem supply brown-out via PFI. Use Value: Supports fail-safe OTA update recovery by asserting RESET only after all monitored rails stabilize for 100 ms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3306-15QDRQ1 | Same electrical specs and pinout; differs only in packaging marking (615Q1 vs 615Q1G4) and tape-and-reel status (Active vs Obsolete). | Identical functional replacement; suitable for new designs where long-term availability is prioritized. | Select TPS3306-15QDRQ1 for production builds requiring guaranteed supply continuity and TI's current recommended version. |
| TLV809E33DBVR | Single 3.3 V supervisor (no dual-rail or watchdog); SOT-23-3 package; 1.6 V min VDD; no PFI/PFO functionality. | Limited to basic 3.3 V monitoring; cannot replace dual-supply or watchdog requirements of TPS3306-15QDRG4Q1. | Use only when supervising one rail and space constraints prohibit SOIC-8; requires additional discrete components for full TPS3306-15QDRG4Q1 functionality. |
Compared with TPS3306-15QDRG4Q1, TPS3306-15QDRQ1 offers identical supervision performance and automotive qualification with assured long-term availability, whereas TLV809E33DBVR lacks dual-rail capability, watchdog, and power-fail detection-making it unsuitable as a drop-in alternative but viable for simplified single-rail use cases.
Availability
TPS3306-15QDRG4Q1 is available at Aetrix Electronics and suitable for automotive ECU, ADAS camera modules, telematics control units, and infotainment head units requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TPS3306-15QDRG4Q1 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 electronics, with decades of experience delivering high-reliability components for mission-critical systems.
The TPS3306-Q1 family was designed specifically for automotive DSP and microcontroller platforms requiring dual-rail voltage supervision, watchdog protection, and power-fail warning in harsh thermal and electrical environments.
FAQ
What is the exact voltage threshold monitored by SENSE2 on the TPS3306-15QDRG4Q1?
The TPS3306-15QDRG4Q1 monitors SENSE2 at a fixed threshold of 1.4 V (typical), with a specified range of 1.35 V to 1.44 V across temperature and supply conditions. This threshold is factory-trimmed and applies specifically to the -15 variant, which is configured for 3.3 V / 1.5 V dual-rail supervision. The value is not adjustable and does not depend on external components.
Does the TPS3306-15QDRG4Q1 require external components to operate its watchdog timer?
No, the TPS3306-15QDRG4Q1 watchdog timer operates autonomously using an internal oscillator and requires only periodic edge transitions on the WDI pin to prevent timeout. No external capacitors or resistors are needed for timing. Leaving WDI unconnected disables the watchdog function entirely, and the device defaults to standard voltage supervision mode.
Can the TPS3306-15QDRG4Q1 be used to monitor a 5 V supply instead of 3.3 V?
No - the TPS3306-15QDRG4Q1 is specifically configured for 3.3 V / 1.5 V rail supervision, with fixed SENSE1 threshold of 2.93 V (typ). For 5 V monitoring, TI recommends the TPS3306-33QDRQ1 variant, which has a SENSE1 threshold of 4.55 V (typ) and is pin-compatible. Using TPS3306-15QDRG4Q1 on a 5 V rail would result in continuous RESET assertion.
What is the meaning of "QDRG4Q1" in the TPS3306-15QDRG4Q1 part number?
The suffix "QDRG4Q1" indicates an obsolete SOIC-8 (D) package variant qualified for automotive use (Q1), with G4 denoting a specific assembly/test flow and tape-and-reel packaging. Per TI's Package Option Addendum, TPS3306-15QDRG4Q1 is marked "615Q1" and listed as obsolete, while TPS3306-15QDRQ1 is the active, recommended replacement with identical functionality.
How does the power-fail comparator (PFI/PFO) function in the TPS3306-15QDRG4Q1?
The PFI input compares an external voltage against an internal 1.25 V reference. When PFI falls below 1.25 V (typ), the open-drain PFO output pulls low. With 10 mV hysteresis, PFO returns high when PFI rises above ~1.26 V. Users configure the trip point using a resistor divider (e.g., R1 + R2 ≈ 1 MΩ, 1% tolerance) to monitor voltages such as battery levels or auxiliary supplies.
TPS3306-15QDRG4Q1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.4V, 2.93V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 70ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS3306-15QDRG4Q1 FAQ
1.How can I place an order for TPS3306-15QDRG4Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3306-15QDRG4Q1 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 TPS3306-15QDRG4Q1 reliable?
The price and inventory of TPS3306-15QDRG4Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3306-15QDRG4Q1 is usually 5 days.
3.What payment methods are accepted for TPS3306-15QDRG4Q1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3306-15QDRG4Q1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3306-15QDRG4Q1?
TPS3306-15QDRG4Q1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3306-15QDRG4Q1 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 TPS3306-15QDRG4Q1?
For technical support, including TPS3306-15QDRG4Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3306-15QDRG4Q1 requirements.
6.How does Aetrix verify that TPS3306-15QDRG4Q1 is sourced from the original manufacturer or authorized distributors?
All TPS3306-15QDRG4Q1 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 TPS3306-15QDRG4Q1 meets industry standards.
7.What is the process for return or replacement of TPS3306-15QDRG4Q1?
All TPS3306-15QDRG4Q1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3306-15QDRG4Q1, 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 TPS3306-15QDRG4Q1 part is unused and in its original packaging.
Return procedure for TPS3306-15QDRG4Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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