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Texas Instruments TPS3307-18D
- Part No.:
- TPS3307-18D
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS3307-18D.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,255
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Product details
Overview
TPS3307-18D from Texas Instruments is a triple-voltage supervisor IC designed for DSP and microprocessor-based systems requiring simultaneous monitoring of 3.3V, 1.8V, and an adjustable supply (≥1.25V). It delivers fixed 200ms power-on reset delay, operates from 2V to 6V supply, draws ≤40µA quiescent current, and features dual active-low/high RESET outputs. It is used in industrial programmable controllers and automotive ECUs where multi-rail power integrity is critical.
For engineers reviewing the TPS3307-18D datasheet, TPS3307-18D pinout, TPS3307-18D application, or TPS3307-18D equivalent, key selection criteria include its triple-sense threshold configuration (2.93V/1.68V/1.25V typ), manual reset input (MR), guaranteed RESET assertion down to VDD ≥1.1V, and SOIC-8 package compatibility with legacy board layouts.
Technical Context
The TPS3307-18D integrates three independent voltage comparators with temperature-compensated 1.25V reference, each feeding a shared reset logic block with internal 200ms timer. Its SENSE1 and SENSE2 inputs are factory-trimmed for nominal 3.3V and 1.8V rails; SENSE3 is fully adjustable via external resistor divider.
RESET assertion occurs when any SENSE input falls below its respective VIT– threshold (e.g., 1.64V for SENSE2), and deassertion requires all inputs to exceed VIT+ plus hysteresis (30mV typical at 1.68V). MR overrides all sense inputs, forcing immediate low-going RESET with propagation delay <500ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage range | 2V to 6V - supports wide-input systems including 3.3V, 5V, and battery-backed rails. |
| SENSE1 threshold (VIT+) | 2.93V typical - monitors 3.3V nominal supply with ±3% tolerance and 30mV hysteresis. |
| SENSE2 threshold (VIT+) | 1.68V typical - monitors 1.8V nominal supply with ±3% tolerance and 30mV hysteresis. |
| SENSE3 threshold (VIT+) | 1.25V typical - user-adjustable reference enabling supervision of any rail ≥1.25V via resistor divider. |
| Power-on reset delay | 200ms typical - fixed internal timer ensures reliable system initialization without external capacitor. |
| Quiescent supply current | 40µA maximum - enables use in always-on, low-power embedded applications. |
| Operating temperature | –40°C to +85°C - qualified for industrial and automotive under-hood environments. |
Pinout & Package
TPS3307-18D is housed in an 8-pin SOIC (D) package, 3.9mm × 4.9mm body, 1.75mm max height, with standard 1.27mm pitch and gull-wing leads. Pin 1 is marked by a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SENSE1) | Voltage sense input 1 | Monitors 3.3V rail; asserts RESET if voltage drops below 2.93V (typ) with 30mV hysteresis. |
| 2 (SENSE2) | Voltage sense input 2 | Monitors 1.8V rail; asserts RESET if voltage drops below 1.68V (typ) with 30mV hysteresis. |
| 3 (SENSE3) | Voltage sense input 3 | Adjustable input referenced to 1.25V; enables supervision of any rail ≥1.25V using external divider. |
| 4 (GND) | Ground reference | Analog and digital ground return; must be low-impedance connection to system GND plane. |
| 5 (RESET) | Active-low reset output | Open-drain output; sinks up to 5mA; requires external pull-up for processor reset line interface. |
| 6 (RESET) | Active-high reset output | Push-pull output; drives high/low directly; compatible with logic-level reset inputs without pull-up. |
| 7 (MR) | Manual reset input | Active-low asynchronous reset trigger; overrides all sense inputs; debounced internally. |
| 8 (VDD) | Supply voltage input | Primary power input (2V–6V); RESET is asserted as long as VDD ≥1.1V during power-up. |
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. |
| Fixed 200ms reset timeout | No external timing capacitor required-reduces BOM count and layout area while ensuring deterministic reset duration. |
| Dual RESET outputs | Provides both active-low (open-drain) and active-high (push-pull) signals-supports mixed-logic reset architectures. |
| Temperature-compensated reference | 1.25V bandgap reference stable over –40°C to +85°C-ensures consistent threshold accuracy across operating range. |
| Low quiescent current | 40µA max supply current-enables integration into battery-powered or energy-harvesting systems without significant load. |
Applications
| Industrial Programmable Logic Controllers | Automotive Engine Control Units |
|---|---|
Use Scenario: Monitoring 5V MCU core, 3.3V I/O, and 1.8V FPGA configuration rails during cold cranking and load dump events. IC Role / Device Role / Timing Role: Triple supervisor ensures synchronized reset release only after all rails stabilize above thresholds, preventing partial initialization. Use Value: Prevents firmware corruption and latch-up by enforcing strict sequencing-critical during transient-rich vehicle electrical environments. |
Use Scenario: Supervising 3.3V sensor interface, 1.8V ADC reference, and adjustable 2.5V analog front-end supply in ECU mainboard. IC Role / Device Role / Timing Role: SENSE3 configured for 2.5V rail via resistor divider; MR tied to ignition switch for hard reset on key-off/key-on transition. Use Value: Enables single-chip supervision of heterogeneous voltage domains-reducing component count and PCB footprint vs. discrete solutions. |
| Portable Medical Instrumentation | Network Edge Routers |
Use Scenario: Power sequencing for battery-backed 3.3V microcontroller, 1.8V RF transceiver, and adjustable 2.8V display driver in handheld diagnostic device. IC Role / Device Role / Timing Role: Monitors all rails during battery discharge; RESET remains asserted if any rail dips below threshold due to sag. Use Value: Guarantees safe shutdown before brownout-induced data loss-meets IEC 62304 safety requirements for Class B devices. |
Use Scenario: Ensuring clean boot of dual-core SoC (3.3V core, 1.8V DDR, adjustable 1.2V SerDes supply) after AC power restoration. IC Role / Device Role / Timing Role: Uses 200ms fixed delay to allow LDOs and DC/DC converters full stabilization before releasing processor reset. Use Value: Eliminates need for custom RC timing networks-improves design repeatability and reduces qualification time for telecom-grade hardware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3307-18DGN | HVSSOP-8 package (3mm × 3mm, 1.1mm height) vs. SOIC-8 (3.9mm × 4.9mm); identical electrical specs and pinout. | Better thermal performance and smaller footprint; requires re-layout for fine-pitch assembly and thermal pad soldering. | Select DGN for space-constrained designs needing improved power dissipation; verify stencil design per TI's DGN0008D land pattern. |
| MAX6816TPS3307-18D | Single-supply supervisor (one sense input); no triple-monitoring capability; different reset timing architecture (adjustable delay). | Limited to single-rail systems; cannot replace TPS3307-18D in multi-voltage applications without redesign. | Only consider for cost-sensitive, single-rail applications where triple supervision is unnecessary-no functional equivalence. |
Compared with TPS3307-18DGN, the TPS3307-18D offers proven manufacturability in standard SOIC flow but occupies more board area; compared with MAX6816, it provides essential triple-rail supervision and fixed 200ms delay-making it irreplaceable in DSP/microprocessor systems requiring coordinated multi-supply reset.
Availability
TPS3307-18D is available at Aetrix Electronics and suitable for industrial programmable controls, automotive engine management systems, and portable medical instrumentation requiring stable component supply across extended product lifecycles.
Supply support for TPS3307-18D 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 over 50 years of innovation in industrial and automotive electronics.
The TPS3307 family was engineered specifically for DSP and microprocessor-based systems needing robust, low-power supervision of multiple supply rails-addressing reliability gaps in early embedded control applications.
FAQ
What is the exact SENSE1 and SENSE2 threshold voltage for TPS3307-18D?
The TPS3307-18D has factory-trimmed SENSE1 and SENSE2 thresholds: SENSE1 VIT+ is 2.93V typical (2.86V min, 3.02V max) for 3.3V rail monitoring; SENSE2 VIT+ is 1.68V typical (1.64V min, 1.72V max) for 1.8V rail monitoring. These values are specified over –40°C to +85°C and include 30mV hysteresis to prevent chatter during marginal conditions. The TPS3307-18D datasheet confirms these thresholds are not user-adjustable.
Does TPS3307-18D require an external capacitor for the 200ms reset delay?
No, the TPS3307-18D uses an internal precision timer to generate the 200ms (140–280ms) power-on reset delay-no external capacitor is needed. This eliminates timing component variation, improves board-level reliability, and reduces bill-of-materials count. The TPS3307-18D achieves this with on-chip oscillator and counter circuitry, validated across temperature and voltage ranges per SLVS199C.
Can SENSE3 on TPS3307-18D monitor a 2.5V supply?
Yes, SENSE3 on the TPS3307-18D is designed for user-defined voltage monitoring and can supervise a 2.5V rail using an external resistor divider that scales the input to the 1.25V internal reference. The TPS3307-18D datasheet specifies SENSE3 VIT+ = 1.25V typical, so a 2:1 divider (e.g., 100kΩ/100kΩ) yields precise 2.5V detection. Threshold accuracy depends on resistor tolerance and temperature drift.
What is the minimum VDD required to assert RESET on TPS3307-18D?
The TPS3307-18D asserts RESET when VDD rises above 1.1V-this is the power-up reset voltage threshold. Below 1.1V, the internal circuitry is non-functional and RESET state is undefined. Once VDD exceeds 1.1V, the TPS3307-18D begins monitoring SENSE inputs and asserting RESET if any falls below its VIT– threshold. This behavior is guaranteed across temperature and process corners.
Is TPS3307-18D pin-compatible with other TPS3307 variants like TPS3307-25D?
Yes, all TPS3307-xD variants-including TPS3307-18D, TPS3307-25D, and TPS3307-33D-share identical SOIC-8 pinout, electrical interface, and timing characteristics. Only the factory-trimmed SENSE1/SENSE2 thresholds differ (1.68V/2.93V for -18D, 2.25V/2.93V for -25D, 2.93V/4.55V for -33D). This allows drop-in replacement in existing layouts when voltage monitoring requirements change.
TPS3307-18D 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:
- 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
TPS3307-18D FAQ
1.How can I place an order for TPS3307-18D through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3307-18D 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 TPS3307-18D reliable?
The price and inventory of TPS3307-18D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3307-18D is usually 5 days.
3.What payment methods are accepted for TPS3307-18D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3307-18D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3307-18D?
TPS3307-18D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3307-18D 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 TPS3307-18D?
For technical support, including TPS3307-18D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3307-18D requirements.
6.How does Aetrix verify that TPS3307-18D is sourced from the original manufacturer or authorized distributors?
All TPS3307-18D 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 TPS3307-18D meets industry standards.
7.What is the process for return or replacement of TPS3307-18D?
All TPS3307-18D units undergo pre-shipment inspection (PSI). If there is an issue with TPS3307-18D, 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 TPS3307-18D part is unused and in its original packaging.
Return procedure for TPS3307-18D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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