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Texas Instruments TPS3307-33D
- Part No.:
- TPS3307-33D
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS3307-33D.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:295
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Product details
Overview
TPS3307-33D from Texas Instruments is a triple-voltage supervisor IC designed for DSP, microcontroller, and microprocessor systems requiring independent monitoring of 5V, 3.3V, and an adjustable supply (≥1.25V). It delivers fixed 200ms power-on reset delay, operates from 2V–6V supply, draws ≤40µA quiescent current, and features dual active-low/high RESET outputs in an SOIC-8 package. It is used in industrial programmable controllers and automotive ECUs where multi-rail power integrity is critical.
For engineers reviewing the TPS3307-33D datasheet, TPS3307-33D pinout, TPS3307-33D application, or TPS3307-33D equivalent, key selection considerations include its triple-sense threshold configuration (4.55V/2.93V/1.25V typ), manual reset input (MR), temperature-compensated reference, and guaranteed RESET assertion down to VDD ≥1.1V - all validated for –40°C to +85°C operation.
Technical Context
The TPS3307-33D integrates three independent voltage comparators with precision, temperature-compensated thresholds (4.55V for SENSE1, 2.93V for SENSE2, 1.25V for SENSE3) and hysteresis (30–40mV). Its internal 200ms reset timer initiates only after all three sense inputs exceed their respective VIT+ thresholds, ensuring synchronized system initialization.
It supports manual reset via MR pin (active-low, TTL-compatible), provides both active-low and active-high RESET outputs with rail-to-rail drive capability (VOL ≤0.4V at 2mA, VOH ≥VDD–0.4V), and maintains functional reset assertion even as VDD drops to 1.1V - enabling robust brown-out detection in battery-backed or low-VDD scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 6V - supports wide-input systems including 3.3V and 5V rails without external regulation. |
| SENSE Thresholds (typ) | SENSE1 = 4.55V, SENSE2 = 2.93V, SENSE3 = 1.25V - factory-trimmed for nominal 5V/3.3V/adjustable monitoring. |
| Reset Delay Time | 200ms (typ) - fixed internal timer eliminates need for external RC network; ensures reliable processor boot sequencing. |
| Quiescent Current | 40µA max - enables use in always-on, low-power subsystems such as watchdog circuits in portable equipment. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and automotive under-hood applications without derating. |
| RESET Output Drive | Active-low: VOL ≤0.4V @ 2mA; Active-high: VOH ≥VDD–0.4V @ –2mA - sufficient for direct interface to most MCU reset inputs. |
| Minimum VDD for RESET | 1.1V - guarantees reset assertion during deep brown-out, preventing undefined processor states. |
Pinout & Package
TPS3307-33D is housed in an 8-pin SOIC (D) package, 3.9mm × 4.9mm, 1.75mm max height, RoHS-compliant with NiPdAu lead finish and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: SENSE1 | Voltage monitor input 1 | Monitors 5V rail (threshold 4.55V); requires no external divider for nominal 5V supervision. |
| 2: SENSE2 | Voltage monitor input 2 | Monitors 3.3V rail (threshold 2.93V); compatible with standard 3.3V logic supplies. |
| 3: SENSE3 | Voltage monitor input 3 | Adjustable input (1.25V threshold); monitors any supply ≥1.25V using external resistor divider. |
| 4: GND | Ground reference | Common return for all analog and digital circuitry; must be low-impedance for accurate threshold sensing. |
| 5: RESET | Active-low reset output | Open-drain capable (5mA sink); pulls low when any SENSEn < VIT– or MR = low. |
| 6: RESET | Active-high reset output | Pull-up required externally; complements active-low output for mixed-logic interface requirements. |
| 7: MR | Manual reset input | Active-low TTL-compatible input; forces RESET assertion regardless of SENSEn states. |
| 8: VDD | Power supply input | Supplies internal reference, comparators, and timer; powers both RESET outputs. |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent voltage supervision | Simultaneously monitors 5V, 3.3V, and user-defined rail - eliminates need for three discrete supervisors and reduces BOM count. |
| Fixed 200ms reset timeout | No external capacitor required - simplifies layout, improves timing consistency across temperature and voltage. |
| Temperature-compensated reference | Threshold drift <±0.5% over –40°C to +85°C - ensures stable trip points in industrial environments. |
| Dual RESET outputs | Both active-low and active-high signals available - supports legacy and modern MCU reset architectures without level-shifting. |
| Low supply current (40µA) | Enables integration into always-on power domains - suitable for battery-backed systems and energy-sensitive designs. |
Applications
| Industrial Programmable Logic Controller (PLC) | Automotive Engine Control Unit (ECU) |
|---|---|
|
Use Scenario: Monitors 5V I/O bus, 3.3V microcontroller core, and 1.8V FPGA configuration rail during cold cranking and load dump events. IC Role / Device Role / Timing Role: Triple supervisor ensures coordinated reset release only after all rails stabilize above thresholds, preventing partial initialization. Use Value: Prevents firmware corruption and communication lockup by enforcing strict power-rail sequencing before CPU execution begins. |
Use Scenario: Supervises 5V sensor supply, 3.3V CAN transceiver, and adjustable 2.5V ADC reference in engine management systems. IC Role / Device Role / Timing Role: Detects undervoltage on any monitored rail and asserts RESET within 5µs (tPHL), meeting ISO 16750-2 transient immunity requirements. Use Value: Guarantees deterministic ECU restart after battery voltage sag, reducing diagnostic trouble code (DTC) false positives. |
| Notebook Computer Power Management | Wireless Base Station Control Card |
|
Use Scenario: Validates 5V USB-C PD rail, 3.3V SoC I/O, and 1.2V DDR memory termination voltage during AC/DC adapter transitions. IC Role / Device Role / Timing Role: Uses MR pin to synchronize reset with thermal shutdown signals from PMIC, enabling graceful OS suspend before power loss. Use Value: Eliminates data loss during adapter hot-swap by extending reset hold time beyond typical 200ms delay via MR override. |
Use Scenario: Supervises 5V backplane, 3.3V FPGA configuration, and adjustable 1.5V SerDes supply in remote radio head control boards. IC Role / Device Role / Timing Role: Provides fail-safe reset initiation when any rail falls below VIT– (e.g., SENSE1 <4.46V), with 30mV hysteresis preventing chatter near threshold. Use Value: Maintains system uptime by triggering controlled reboot instead of uncontrolled crash during marginal power conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3307-33DGN | HVSSOP-8 package (2.3mm × 2.0mm), 1.1mm max height; same electrical specs and pinout as TPS3307-33D. | Better thermal performance and smaller footprint; suited for space-constrained PCBs with thermal pads. | Select DGN for high-density layouts or improved thermal dissipation; D package preferred for legacy SOIC footprints and ease of hand-soldering. |
| MAX6833EUT+T | Triple supervisor with 4.63V/3.08V/1.25V thresholds, 200ms delay, but only single active-low RESET output and higher 60µA supply current. | Lacks active-high RESET output; requires external inverter for complementary signal; not pin-compatible. | Choose MAX6833EUT+T only if board redesign accommodates different pinout and single-output architecture; TPS3307-33D offers superior interface flexibility. |
Compared with TPS3307-33DGN, the TPS3307-33D provides identical supervision functionality in a larger, more manufacturable SOIC package - ideal for prototyping and medium-volume production where thermal constraints are less severe. Against MAX6833EUT+T, it delivers dual-reset signaling and lower quiescent current, directly reducing system-level power budget and simplifying reset logic design.
Availability
TPS3307-33D is available at Aetrix Electronics and suitable for industrial programmable controls, automotive electronic control units, and notebook computer power management systems requiring stable component supply across extended product lifecycles.
Supply support for TPS3307-33D 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 power management technologies, with decades of experience in high-reliability supervisory circuits.
The TPS3307 family was engineered specifically for DSP and microprocessor-based systems needing simultaneous multi-rail power monitoring and deterministic reset sequencing - targeting industrial automation, automotive, and computing infrastructure markets.
FAQ
What is the exact threshold voltage for SENSE1 on the TPS3307-33D?
The TPS3307-33D has a nominal SENSE1 threshold of 4.55V (VIT+), with min/max values of 4.46V and 4.64V over temperature and voltage. This is factory-trimmed for monitoring a 5V supply and does not require external resistor scaling unless custom voltage supervision is needed.
Does the TPS3307-33D require an external capacitor for its 200ms reset delay?
No, the TPS3307-33D uses an internal precision timer for its 200ms (typ) reset delay - no external capacitor is required. This eliminates timing variation due to component tolerance and temperature drift, ensuring consistent reset behavior across production units and operating conditions.
Can the TPS3307-33D monitor a 2.5V supply on SENSE2?
No - the TPS3307-33D is configured for 5V/3.3V/adjustable supervision. Its SENSE2 threshold is fixed at 2.93V (nominal), optimized for 3.3V rails. To monitor 2.5V, use the adjustable SENSE3 input with an external resistor divider to scale the 2.5V signal to ≥1.25V at the pin.
What is the minimum VDD voltage at which the TPS3307-33D asserts RESET?
The TPS3307-33D asserts RESET when VDD rises above 1.1V (power-up reset voltage), guaranteeing functional reset generation even during severe brown-out conditions. This specification is tested and guaranteed across the full –40°C to +85°C temperature range.
Is the TPS3307-33D pin-compatible with other members of the TPS3307 family?
Yes - all TPS3307-x variants (e.g., TPS3307-18D, TPS3307-25D, TPS3307-33D) share identical SOIC-8 pinouts and electrical interfaces. Only the SENSE1/SENSE2 thresholds differ; SENSE3 remains fixed at 1.25V. This allows drop-in replacement when adjusting monitored rail voltages without PCB changes.
TPS3307-33D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 2.93V, 4.55V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS3307-33D FAQ
1.How can I place an order for TPS3307-33D through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3307-33D 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 TPS3307-33D reliable?
The price and inventory of TPS3307-33D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3307-33D is usually 5 days.
3.What payment methods are accepted for TPS3307-33D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3307-33D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3307-33D?
TPS3307-33D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3307-33D 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 TPS3307-33D?
For technical support, including TPS3307-33D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3307-33D requirements.
6.How does Aetrix verify that TPS3307-33D is sourced from the original manufacturer or authorized distributors?
All TPS3307-33D 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 TPS3307-33D meets industry standards.
7.What is the process for return or replacement of TPS3307-33D?
All TPS3307-33D units undergo pre-shipment inspection (PSI). If there is an issue with TPS3307-33D, 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 TPS3307-33D part is unused and in its original packaging.
Return procedure for TPS3307-33D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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