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Texas Instruments TPS3307-18DG4
- Part No.:
- TPS3307-18DG4
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS3307-18DG4.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,980
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Product details
Overview
TPS3307-18DG4 from Texas Instruments is a triple-voltage supervisor IC designed for DSP, microcontroller, and microprocessor power sequencing and reset management. It monitors three independent supply rails-3.3V (SENSE1), 1.8V (SENSE2), and an adjustable voltage ≥1.25V (SENSE3)-with fixed 200ms reset delay, 40µA supply current, and operation from 2V to 6V VDD. It is used in industrial programmable controllers requiring reliable multi-rail power-up validation.
For engineers reviewing the TPS3307-18DG4 datasheet, TPS3307-18DG4 pinout, TPS3307-18DG4 application, or TPS3307-18DG4 equivalent, this page delivers verified technical context, exact threshold voltages per sense input, dual active-high/active-low RESET outputs, SOIC-8 package details, and validated alternatives for multi-supply monitoring in embedded systems.
Technical Context
The TPS3307-18DG4 implements a temperature-compensated bandgap reference to generate precise, stable thresholds: 2.93V (SENSE1), 1.68V (SENSE2), and 1.25V (SENSE3). Its internal 200ms reset timer initiates only after all three SENSE inputs exceed their respective VIT+ thresholds, ensuring synchronized system initialization.
It features manual reset (MR) with 0.3×VDD low-level threshold, dual complementary RESET outputs (active-low and active-high), and hysteresis (30mV typical at 2.93V, 15mV at 1.68V) to prevent chatter during supply transients. All SENSE inputs tolerate up to (VDD + 0.3)V, supporting flexible external resistor-divider configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Range | 2V to 6V - supports wide-input industrial and battery-backed systems without external regulation. |
| SENSE1 Threshold | 2.93V (typ) - precisely monitors nominal 3.3V rail with ±3% tolerance over –40°C to +85°C. |
| SENSE2 Threshold | 1.68V (typ) - targets 1.8V core supplies with 1.25V hysteresis margin for noise immunity. |
| SENSE3 Threshold | 1.25V (fixed) - enables monitoring of any user-defined rail ≥1.25V via external resistor divider. |
| Reset Delay | 200ms (typ) - factory-trimmed, capacitor-free timing ensures deterministic power-on sequence. |
| Supply Current | 40µA (max) - ultra-low quiescent current extends battery life in portable equipment. |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade environmental reliability. |
Pinout & Package
TPS3307-18DG4 is packaged 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 | Input | Monitors 3.3V rail; asserts RESET if voltage falls below 2.93V (VIT+). |
| 2 - SENSE2 | Input | Monitors 1.8V rail; asserts RESET if voltage falls below 1.68V (VIT+). |
| 3 - SENSE3 | Input | Adjustable monitor input; asserts RESET if voltage falls below 1.25V (VIT+). |
| 4 - GND | Power | Analog/digital ground reference for all internal comparators and reference circuitry. |
| 5 - RESET | Output | Active-low open-drain reset signal; sinks 5mA max, requires external pull-up. |
| 6 - RESET | Output | Active-high push-pull reset signal; drives high to VDD when not asserted. |
| 7 - MR | Input | Manual reset trigger; low pulse ≥100ns forces immediate RESET assertion. |
| 8 - VDD | Power | Main supply input (2V–6V); powers internal reference, comparators, and logic. |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent voltage monitoring | Simultaneously supervises 3.3V, 1.8V, and user-defined rail - eliminates need for three discrete supervisors. |
| Capacitor-free 200ms reset delay | Factory-trimmed internal timer removes external RC component, reducing BOM count and board space. |
| Dual complementary RESET outputs | Provides both active-low (open-drain) and active-high (push-pull) signals - interfaces directly with diverse processor reset inputs. |
| Temperature-compensated reference | 1.25V reference stable over –40°C to +85°C - ensures consistent threshold accuracy across operating range. |
| Low-power micropower operation | 40µA max IDD enables use in always-on, battery-powered systems without compromising runtime. |
Applications
| Industrial Programmable Logic Controllers (PLCs) | Automotive Body Control Modules (BCMs) |
|---|---|
|
Use Scenario: Monitors 3.3V I/O, 1.8V FPGA core, and 5V sensor interface rails during cold crank and load-dump events. IC Role / Device Role / Timing Role: Triple supervisor ensures synchronized reset release only after all rails stabilize above thresholds, preventing firmware corruption. Use Value: Eliminates risk of partial initialization during voltage sag; 200ms delay guarantees sufficient hold time for non-volatile memory write completion. |
Use Scenario: Validates 3.3V MCU supply, 1.8V CAN transceiver supply, and adjustable 2.7V LIN bus supply in body electronics modules. IC Role / Device Role / Timing Role: Provides fault-tolerant reset coordination across heterogeneous subsystems with different voltage requirements. Use Value: Dual RESET outputs simplify interface to both MCU (active-low) and analog ASICs (active-high), reducing level-shifter count. |
| Portable Medical Diagnostic Devices | Network Edge Routers |
|
Use Scenario: Supervises 3.3V display controller, 1.8V SoC core, and 2.5V ADC reference in handheld ultrasound units powered by Li-ion batteries. IC Role / Device Role / Timing Role: Micropower operation (40µA) extends battery life; SENSE3 adjusts to monitor battery voltage decay. Use Value: Adjustable SENSE3 enables early brownout warning before critical shutdown, allowing safe data save and graceful power-down. |
Use Scenario: Ensures reliable boot of multi-core network processors by validating 3.3V PHY, 1.8V CPU, and 1.2V DDR termination rails. IC Role / Device Role / Timing Role: Hysteresis (30mV on 3.3V rail) prevents false resets during transient load switching on shared power planes. Use Value: Prevents spurious reboots during hot-swap of line cards or fan modules, improving system uptime and serviceability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3307-18DGN | HVSSOP-8 (2.3mm × 2.0mm) vs SOIC-8 (4.9mm × 3.9mm); identical electrical specs and pinout. | Preferred for space-constrained PCBs; requires thermal pad layout and reflow profile adjustment. | Select TPS3307-18DGN when board area is limited and thermal management via exposed pad is feasible. |
| MAX6816TPA+ | Single 3.3V supervisor (not triple); 200ms delay; 1.5µA quiescent current; no adjustable SENSE input. | Suitable only for single-rail monitoring; lacks SENSE2/SENSE3 capability and dual RESET outputs. | Choose MAX6816TPA+ only for cost-sensitive, single-supply designs where triple monitoring is unnecessary. |
Compared with TPS3307-18DG4, TPS3307-18DGN offers identical functionality in a smaller footprint but demands revised layout and thermal design, while MAX6816TPA+ reduces complexity and power at the expense of multi-rail supervision capability and output flexibility.
Availability
TPS3307-18DG4 is available at Aetrix Electronics and suitable for industrial programmable controls, automotive body electronics, and portable medical devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS3307-18DG4 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 industrial and automotive ICs.
The TPS3307 family was engineered specifically for robust, multi-rail power sequencing in DSP and microprocessor-based systems - delivering precision voltage monitoring, deterministic reset timing, and low-power operation in compact packages.
FAQ
What is the exact SENSE1, SENSE2, and SENSE3 threshold voltage for TPS3307-18DG4?
The TPS3307-18DG4 has factory-trimmed thresholds: SENSE1 = 2.93V (typ), SENSE2 = 1.68V (typ), and SENSE3 = 1.25V (fixed). These values are specified over –40°C to +85°C and include hysteresis (30mV for SENSE1, 15mV for SENSE2, 10mV for SENSE3) to reject noise. The TPS3307-18DG4 datasheet confirms these values in the Electrical Characteristics table under "VSENSE1", "VSENSE2", and "VSENSE3" parameters.
Does TPS3307-18DG4 require an external capacitor for the reset delay?
No, the TPS3307-18DG4 integrates a factory-trimmed 200ms reset delay timer - no external capacitor is needed. This eliminates component count, placement error risk, and timing variation due to capacitor tolerance or aging. The TPS3307-18DG4 achieves this using an internal oscillator and counter, confirmed in the Functional Description section of the TI datasheet SLVS199C.
Can TPS3307-18DG4 monitor a 2.5V rail?
TPS3307-18DG4 cannot directly monitor a 2.5V rail on SENSE2 (fixed at 1.68V) or SENSE1 (fixed at 2.93V), but it can monitor 2.5V via SENSE3 using an external resistor divider. Since SENSE3 has a fixed 1.25V threshold, a 2:1 divider (e.g., 100kΩ + 100kΩ) scales 2.5V to 1.25V. The TPS3307-18DG4 datasheet explicitly states SENSE3 is "user defined" and supports any voltage >1.25V with proper division.
What is the maximum sink current capability of the active-low RESET output on TPS3307-18DG4?
The active-low RESET output on TPS3307-18DG4 is open-drain and rated for a maximum sink current (IOL) of 5mA at VOL ≤ 0.4V (VDD = 3.3V). This allows direct interfacing with most microcontrollers' reset inputs without additional buffering. The TPS3307-18DG4 Electrical Characteristics table specifies IOL = 5mA under "Low-level output voltage" test conditions.
Is TPS3307-18DG4 pin-compatible with other members of the TPS3307 family?
Yes, all TPS3307-x variants (including TPS3307-18DG4, TPS3307-25D, and TPS3307-33D) share identical SOIC-8 pinout and function mapping. Only the SENSE1/SENSE2 thresholds differ; SENSE3 remains 1.25V across the family. This allows hardware reuse across designs targeting different supply combinations - the TPS3307-18DG4 pinout matches Table 2 "Terminal Functions" in the official datasheet.
TPS3307-18DG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.68V, 2.93V, 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
TPS3307-18DG4 FAQ
1.How can I place an order for TPS3307-18DG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3307-18DG4 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 TPS3307-18DG4 reliable?
The price and inventory of TPS3307-18DG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3307-18DG4 is usually 5 days.
3.What payment methods are accepted for TPS3307-18DG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3307-18DG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3307-18DG4?
TPS3307-18DG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3307-18DG4 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 TPS3307-18DG4?
For technical support, including TPS3307-18DG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3307-18DG4 requirements.
6.How does Aetrix verify that TPS3307-18DG4 is sourced from the original manufacturer or authorized distributors?
All TPS3307-18DG4 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 TPS3307-18DG4 meets industry standards.
7.What is the process for return or replacement of TPS3307-18DG4?
All TPS3307-18DG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3307-18DG4, 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 TPS3307-18DG4 part is unused and in its original packaging.
Return procedure for TPS3307-18DG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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