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Texas Instruments TPS3707-33DRG4
- Part No.:
- TPS3707-33DRG4
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS3707-33DRG4.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,863
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Product details
Overview
TPS3707-33DRG4 from Texas Instruments is a precision 3.3 V supply-voltage supervisor IC with active-low and active-high reset outputs, fixed 200 ms power-on reset delay, 2.93 V threshold voltage (VIT–), ±50 mV hysteresis, and power-fail comparator for low-battery warning in microcontroller-based systems.
For engineers reviewing the TPS3707-33DRG4 datasheet, TPS3707-33DRG4 pinout, TPS3707-33DRG4 application, or TPS3707-33DRG4 equivalent, key selection criteria include dual-reset polarity support, absence of watchdog timer (distinguishing it from TPS3705-xx), SOIC-8 package compatibility, and operation across –40°C to 85°C industrial temperature range.
Technical Context
The TPS3707-33DRG4 implements dual-output supervision using an internal 1.25 V reference and resistor-divider-based threshold detection. It asserts RESET (active-low) and RESET (active-high) simultaneously when VDD drops below 2.93 V or rises above 2.98 V, with 50 mV hysteresis ensuring noise immunity during brownout recovery.
Its PFI/PFO pair provides independent power-fail monitoring with 1.25 V reference and 10 mV hysteresis, enabling external rail supervision via resistor divider. The MR input supports manual reset with 500 ns minimum pulse width and 600 µA max low-level input current at VDD = 6 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage range | 2 V to 6 V - supports 3.3 V systems with 1 V margin for transient tolerance |
| VIT– threshold | 2.93 V (±50 mV) - precisely monitors 3.3 V rails with guaranteed trip point across temperature |
| Reset delay | 200 ms fixed - eliminates need for external timing capacitor in power-up sequencing |
| Quiescent current | 20 µA to 50 µA - enables long battery life in portable equipment |
| Operating temperature | –40°C to 85°C - qualified for industrial and automotive under-hood environments |
| PFI input hysteresis | 10 mV - prevents chatter on noisy power-fail signals from external supplies |
| Output drive strength | 1 mA sink / 500 µA source - directly interfaces with MCU reset inputs without pull-up/pull-down |
Pinout & Package
TPS3707-33DRG4 is packaged in an 8-pin SOIC (D package) with 3.90 mm × 4.90 mm body size and standard lead pitch. Pin 1 is MR (manual reset input), pin 2 is VDD, pin 3 is GND, pin 4 is PFI (power-fail input), pin 5 is PFO (power-fail output), pin 6 is NC (no internal connection), pin 7 is RESET (active-low), and pin 8 is RESET (active-high).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MR | Manual reset input | Active-low asynchronous reset trigger; requires <600 µA sink to assert |
| VDD | Supply voltage input | Power source for internal reference and comparators; decoupling cap required |
| GND | Ground reference | Common return path for all internal circuits and output drivers |
| PFI | Power-fail comparator input | Monitors external rail via resistor divider; referenced to 1.25 V internal reference |
| PFO | Power-fail comparator output | Active-low open-drain output; requires external pull-up for logic-level interface |
| NC | No internal connection | Unbonded pin; must remain unconnected per datasheet |
| RESET | Active-low reset output | Push-pull output; drives low during VDD undervoltage or MR assertion |
| RESET | Active-high reset output | Complementary push-pull output; drives high during valid VDD and MR deassertion |
Key Features
| Feature | Design Value |
|---|---|
| Dual-polarity reset outputs | Simultaneous active-low and active-high RESET signals eliminate need for external inverters in mixed-logic systems |
| Fixed 200 ms reset delay | Guaranteed power-up hold-off time without external RC network reduces BOM count and layout area |
| 3.3 V precision threshold | 2.93 V VIT– with ±50 mV hysteresis ensures reliable reset assertion across full industrial temperature range |
| Integrated power-fail monitor | PFI/PFO pair enables battery voltage or auxiliary rail monitoring with 1.25 V reference and 10 mV hysteresis |
| Ultra-low quiescent current | 20 µA typical supply current extends battery runtime in always-on portable applications |
Applications
| Industrial Programmable Logic Controllers | Automotive Body Control Modules |
|---|---|
Use Scenario: Supervising 3.3 V microcontroller supply in PLC I/O modules exposed to wide ambient temperature swings and EMI-rich factory floors. IC Role / Device Role / Timing Role: Primary power-on reset generator and brownout detector; provides 200 ms power-up stabilization and dual-polarity reset signaling to ARM Cortex-M4 host. Use Value: Eliminates external timing components and ensures deterministic reset behavior during voltage transients caused by relay switching or motor startup. | Use Scenario: Monitoring 3.3 V domain in BCMs where CAN communication must remain stable during ignition cycling and load-dump events. IC Role / Device Role / Timing Role: Dual-output supervisor providing simultaneous active-low reset to MCU and active-high enable to CAN transceiver during cold-cranking. Use Value: Prevents CAN bus lockup by guaranteeing synchronized reset/enable timing without additional level-shifting circuitry. |
| Portable Medical Diagnostic Devices | Network Edge Routers |
Use Scenario: Ensuring reliable boot sequence in handheld ultrasound units powered by Li-ion batteries with varying state-of-charge voltages. IC Role / Device Role / Timing Role: Main supply supervisor with PFI used to monitor battery voltage via resistor divider; triggers low-battery warning before shutdown. Use Value: Enables graceful firmware save and display alert prior to critical brownout, improving clinical usability and data integrity. | Use Scenario: Securing boot integrity in multi-rail networking hardware where 3.3 V FPGA configuration voltage must stabilize before PCIe link training. IC Role / Device Role / Timing Role: Precision 3.3 V supervisor with 200 ms delay aligned to FPGA configuration clock; PFO signals power-fail to management controller. Use Value: Prevents partial FPGA configuration and PCIe enumeration failures by enforcing strict voltage sequencing and fault reporting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Single active-low reset output; adjustable delay (0.6–10 s); 3.3 V fixed threshold; 1.5 µA quiescent current | Lacks active-high RESET and PFI/PFO; optimized for ultra-low-power battery backup, not dual-output systems | Select when minimal current draw is critical and complementary reset is unnecessary |
| MAX6326–33D2T | Pin-compatible MAX706 replacement; 2.93 V threshold; 200 ms delay; no PFI/PFO; 15 µA quiescent current | Missing power-fail monitoring function; limited to basic reset generation without auxiliary rail supervision | Select when legacy MAX706 drop-in replacement is required and PFI functionality is unused |
Compared with TPS3707-33DRG4, TPS3808G33DBVR offers lower power but sacrifices dual-reset capability and power-fail monitoring, while MAX6326–33D2T provides pin compatibility with older designs but omits PFI/PFO-making TPS3707-33DRG4 optimal for new designs requiring both features.
Availability
TPS3707-33DRG4 is available at Aetrix Electronics and suitable for industrial programmable controllers, automotive body electronics, and portable medical devices requiring stable component supply with guaranteed long-term availability.
Supply support for TPS3707-33DRG4 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 company specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and microcontroller solutions.
The TPS370x family was designed specifically for robust microprocessor supervision in harsh environments, delivering precision voltage monitoring, power-fail detection, and configurable reset timing for DSP, MCU, and FPGA-based systems.
FAQ
What is the exact reset threshold voltage for TPS3707-33DRG4?
The TPS3707-33DRG4 has a guaranteed negative-going input threshold voltage (VIT–) of 2.93 V with ±50 mV hysteresis over the –40°C to 85°C operating range. This value is factory-trimmed and specified in Section 7.5 of the datasheet, ensuring precise 3.3 V rail monitoring without external calibration. The TPS3707-33DRG4 uses an internal 1.25 V reference and resistor divider to achieve this accuracy.
Does TPS3707-33DRG4 include a watchdog timer function?
No, the TPS3707-33DRG4 does not include a watchdog timer. Unlike the TPS3705-xx series, the TPS3707-xx family replaces the WDI/WDO pins with a second RESET output (active-high). The TPS3707-33DRG4 datasheet explicitly states in Section 8.3.3 that "TPS3707-xx devices do not have the watchdog function, but include a high-level output RESET." This makes TPS3707-33DRG4 suitable for applications requiring dual-reset polarity without watchdog supervision.
What package type and footprint does TPS3707-33DRG4 use?
The TPS3707-33DRG4 uses an 8-pin SOIC (D package) with 3.90 mm × 4.90 mm body size and standard 1.27 mm lead pitch. Its orderable part number suffix "DRG4" confirms the SOIC-8 packaging, and the device is pin-compatible with industry-standard MAX705–MAX708 supervisors. The D package is distinct from the MSOP-PowerPAD (DGN) variant, which is not used for this specific part number.
Can TPS3707-33DRG4 monitor a secondary power rail like a battery voltage?
Yes, the TPS3707-33DRG4 can monitor a secondary rail such as battery voltage using its PFI (power-fail input) pin. The internal 1.25 V reference allows external resistor dividers to scale higher voltages (e.g., 12 V battery) down to the PFI input range. When the divided voltage crosses the 1.25 V threshold, PFO asserts low. This function is fully documented in Sections 8.3.2 and 9.2.2 of the TPS3707-33DRG4 datasheet and requires no additional components beyond the divider resistors.
What is the maximum supply voltage rating for TPS3707-33DRG4?
The absolute maximum supply voltage (VDD) for TPS3707-33DRG4 is 7 V, as specified in Section 7.1 of the datasheet. However, for reliable continuous operation, the recommended maximum is 6 V per Section 7.3. Exceeding 6 V for extended periods may impact long-term reliability, and operation above 7 V risks permanent damage. The device is designed for nominal 3.3 V systems with 1 V overhead for transient tolerance.
TPS3707-33DRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- 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
TPS3707-33DRG4 FAQ
1.How can I place an order for TPS3707-33DRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3707-33DRG4 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 TPS3707-33DRG4 reliable?
The price and inventory of TPS3707-33DRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3707-33DRG4 is usually 5 days.
3.What payment methods are accepted for TPS3707-33DRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3707-33DRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3707-33DRG4?
TPS3707-33DRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3707-33DRG4 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 TPS3707-33DRG4?
For technical support, including TPS3707-33DRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3707-33DRG4 requirements.
6.How does Aetrix verify that TPS3707-33DRG4 is sourced from the original manufacturer or authorized distributors?
All TPS3707-33DRG4 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 TPS3707-33DRG4 meets industry standards.
7.What is the process for return or replacement of TPS3707-33DRG4?
All TPS3707-33DRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3707-33DRG4, 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 TPS3707-33DRG4 part is unused and in its original packaging.
Return procedure for TPS3707-33DRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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