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Texas Instruments TPS3306-20QDRG4Q1
- Part No.:
- TPS3306-20QDRG4Q1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS3306-20QDRG4Q1.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,232
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Product details
Overview
TPS3306-20QDRG4Q1 from Texas Instruments is an automotive-grade dual supervisory circuit for DSP and processor-based systems, monitoring 3.3 V and 2.0 V supply rails with threshold voltages of 2.93 V and 1.85 V respectively, featuring a 100-ms power-on reset delay, 0.8-s watchdog time-out, and open-drain RESET/PFO outputs. It operates across −40°C to 125°C and draws only 15 µA typical supply current.
For engineers reviewing the TPS3306-20QDRG4Q1 datasheet, TPS3306-20QDRG4Q1 pinout, TPS3306-20QDRG4Q1 application, or TPS3306-20QDRG4Q1 equivalent, this device serves as a voltage supervisor for multivoltage embedded control, automotive ECUs, and battery-powered instrumentation where dual-rail monitoring and fail-safe reset generation are critical.
Technical Context
The TPS3306-20QDRG4Q1 integrates two independent voltage comparators with fixed thresholds (2.93 V on SENSE1, 1.85 V on SENSE2), a 100-ms reset delay timer, and a watchdog circuit triggered by WDI transitions with 0.8-s nominal time-out. Its internal 1.25-V reference enables configurable PFI monitoring via external resistor dividers.
All outputs-RESET and PFO-are open-drain, supporting wired-OR configurations and flexible pull-up voltage selection. The device asserts RESET when either SENSE input falls below its threshold or during power-up until VDD exceeds 1.1 V, ensuring reliable initialization in automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 6 V - supports wide-input systems including 3.3 V, 5 V, and mixed-rail designs |
| SENSE1 Threshold (VIT1) | 2.93 V (typ) - monitors 3.3 V rail with ~11% undervoltage margin before reset assertion |
| SENSE2 Threshold (VIT2) | 1.85 V (typ) - monitors 2.0 V rail with ~7.5% undervoltage margin |
| Power-On Reset Delay | 100 ms (typ) - ensures stable power sequencing before releasing system reset |
| Watchdog Time-Out | 0.8 s (typ) - detects software hangs in real-time DSP/processor applications |
| Supply Current | 15 µA (typ) - enables low-power operation in always-on automotive modules |
| Operating Temperature | −40°C to 125°C - qualified for under-hood and engine-control unit deployment |
Pinout & Package
TPS3306-20QDRG4Q1 is housed in an SOIC-8 (D package), 3.9 mm × 4.9 mm body, 1.75 mm max height, RoHS-compliant with NIPDAU lead finish and MSL Level-2-260°C-1 year rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SENSE1 (Pin 1) | Voltage sense input 1 | Monitors primary supply (e.g., 3.3 V); asserts RESET if voltage drops below 2.93 V |
| SENSE2 (Pin 2) | Voltage sense input 2 | Monitors secondary supply (e.g., 2.0 V); independent fault detection path |
| PFI (Pin 3) | Power-fail comparator input | Configurable low-battery or auxiliary supply monitor using external resistor divider |
| GND (Pin 4) | Ground reference | Common return for all analog and digital functions; requires low-impedance PCB connection |
| RESET (Pin 5) | Active-low open-drain reset output | Drives system reset line; requires external pull-up to compatible logic voltage |
| PFO (Pin 6) | Active-low open-drain power-fail output | Signals impending supply collapse; supports early warning or graceful shutdown |
| WDI (Pin 7) | Watchdog timer input | Edge-triggered; toggling within 0.8 s prevents reset; unconnected disables watchdog |
| VDD (Pin 8) | Supply voltage input | Primary power source (2.7–6 V); powers internal comparators, timers, and logic |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage supervision | Simultaneously monitors two distinct supply rails (3.3 V/2.0 V) with dedicated thresholds and hysteresis |
| Automotive qualification | AEC-Q100 Grade 1 compliant (−40°C to 125°C), suitable for safety-critical ECU applications |
| Integrated watchdog timer | 0.8-s timeout with edge-sensitive WDI input eliminates need for external timing components |
| Open-drain outputs | RESET and PFO support flexible voltage translation and multi-device bus sharing without level shifters |
| Low quiescent current | 15 µA typical IDD enables use in battery-backed or energy-constrained automotive subsystems |
Applications
| Engine Control Unit (ECU) | Infotainment Power Management |
|---|---|
Use Scenario: Real-time monitoring of MCU core (2.0 V) and I/O (3.3 V) supplies in gasoline/diesel engine controllers. IC Role / Device Role / Timing Role: Dual-rail supervisor generating synchronized reset and watchdog fault signals to prevent unsafe actuator behavior. Use Value: Prevents undetected brownout-induced firmware corruption during cold cranking or load dump events. | Use Scenario: Managing power sequencing and fail-safe shutdown in automotive head units with multiple voltage domains. IC Role / Device Role / Timing Role: Supervises main SoC supply (3.3 V) and memory rail (2.0 V), while PFI monitors backup battery voltage. Use Value: Enables graceful OS shutdown and data preservation when vehicle battery voltage drops below safe operating level. |
| ADAS Camera Module | Telematics Control Unit (TCU) |
Use Scenario: Ensuring clean boot and runtime integrity of image signal processors and SerDes links in forward-facing cameras. IC Role / Device Role / Timing Role: Generates 100-ms POR delay and monitors both processor and sensor interface supplies; WDI tied to ISP firmware heartbeat. Use Value: Eliminates boot failures due to transient supply droop during camera wake-up and guarantees deterministic recovery after watchdog timeout. | Use Scenario: Supervising dual-core application processor (3.3 V) and cellular modem (2.0 V) in LTE/5G telematics gateways. IC Role / Device Role / Timing Role: Provides independent reset control per domain and PFO-driven low-power mode entry when ignition is off. Use Value: Reduces standby current by enabling modem sleep while maintaining GPS tracking readiness via monitored backup rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3306-20QDRQ1 | Same electrical specs and pinout; differs only in packaging - G4 suffix indicates green (halogen-free) variant with alternate tape/reel marking | No functional difference; identical automotive qualification and thermal performance | Select TPS3306-20QDRQ1 for standard production builds where halogen-free compliance is not mandated |
| TLV809E20DBVR | Single-channel 2.0 V supervisor (no SENSE1, no watchdog, no PFI); SOT-23-5 package; 1.6 µA supply current | Lacks dual-rail capability, reset delay, and watchdog - suitable only for simple single-supply monitoring | Choose only if supervising one rail and space/power constraints outweigh need for full feature set |
Compared with TPS3306-20QDRQ1, the TPS3306-20QDRG4Q1 offers identical functionality with enhanced environmental compliance; compared with TLV809E20DBVR, it delivers comprehensive dual-rail supervision, watchdog, and power-fail detection - making it irreplaceable in complex automotive systems requiring coordinated reset and fault signaling.
Availability
TPS3306-20QDRG4Q1 is available at Aetrix Electronics and suitable for automotive ECUs, ADAS camera modules, and telematics control units requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TPS3306-20QDRG4Q1 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, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The TPS3306-Q1 family was designed specifically for automotive applications demanding dual-voltage supervision, watchdog safety features, and AEC-Q100 Grade 1 reliability in harsh environments.
FAQ
What is the exact voltage threshold monitored on SENSE2 for TPS3306-20QDRG4Q1?
The TPS3306-20QDRG4Q1 monitors SENSE2 at a nominal threshold of 1.85 V (typical), with guaranteed range of 1.79 V to 1.91 V over −40°C to 125°C. This is optimized for 2.0 V supply rails and provides ~7.5% undervoltage margin before asserting RESET. The value is fixed and factory-trimmed - no external resistor programming is required for this channel.
Does TPS3306-20QDRG4Q1 support watchdog functionality, and how is it enabled?
Yes, TPS3306-20QDRG4Q1 includes a watchdog timer with 0.8-s nominal time-out. It is enabled by applying periodic rising or falling edges to the WDI pin (Pin 7); leaving WDI unconnected disables the watchdog. The timer resets on each valid transition, and failure to toggle within the time-out window forces RESET active for 100 ms. No external components are needed.
Can TPS3306-20QDRG4Q1 monitor a 5 V supply rail?
No - the TPS3306-20QDRG4Q1 is configured specifically for 3.3 V/2.0 V dual-rail supervision (SENSE1 = 2.93 V, SENSE2 = 1.85 V). For 5 V monitoring, TI recommends TPS3306-33QDRQ1 (SENSE1 = 4.55 V, SENSE2 = 2.93 V). Using TPS3306-20QDRG4Q1 on a 5 V rail would result in permanent RESET assertion since 5 V exceeds both thresholds.
What is the minimum VDD required for TPS3306-20QDRG4Q1 to assert a valid RESET signal?
TPS3306-20QDRG4Q1 asserts RESET when VDD rises above 1.1 V (guaranteed), enabling early reset generation during power-up before internal circuitry fully stabilizes. This ensures robust initialization even with slow-ramping supplies. Below 1.1 V, RESET behavior is undefined; the device remains in reset state until VDD crosses this threshold.
Is TPS3306-20QDRG4Q1 pin-compatible with other members of the TPS3306-Q1 family?
Yes - all TPS3306-Q1 variants (e.g., TPS3306-15QDRQ1, TPS3306-25QDRQ1) share identical SOIC-8 (D) package, pinout, and terminal functions. Only the SENSE1/SENSE2 threshold voltages differ between part numbers. This allows drop-in replacement across the family when adjusting for different supply rail combinations, provided layout accommodates the same footprint.
TPS3306-20QDRG4Q1 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:
- 1.85V, 2.92V
- 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
TPS3306-20QDRG4Q1 FAQ
1.How can I place an order for TPS3306-20QDRG4Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3306-20QDRG4Q1 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 TPS3306-20QDRG4Q1 reliable?
The price and inventory of TPS3306-20QDRG4Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3306-20QDRG4Q1 is usually 5 days.
3.What payment methods are accepted for TPS3306-20QDRG4Q1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3306-20QDRG4Q1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3306-20QDRG4Q1?
TPS3306-20QDRG4Q1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3306-20QDRG4Q1 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 TPS3306-20QDRG4Q1?
For technical support, including TPS3306-20QDRG4Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3306-20QDRG4Q1 requirements.
6.How does Aetrix verify that TPS3306-20QDRG4Q1 is sourced from the original manufacturer or authorized distributors?
All TPS3306-20QDRG4Q1 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 TPS3306-20QDRG4Q1 meets industry standards.
7.What is the process for return or replacement of TPS3306-20QDRG4Q1?
All TPS3306-20QDRG4Q1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3306-20QDRG4Q1, 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 TPS3306-20QDRG4Q1 part is unused and in its original packaging.
Return procedure for TPS3306-20QDRG4Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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