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Texas Instruments TPS3808G12DBVTG4
- Part No.:
- TPS3808G12DBVTG4
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
TPS3808G12DBVTG4.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS3808G12DBVTG4 from Texas Instruments is a low-quiescent-current, programmable-delay supervisory circuit designed to monitor 1.2 V system rails and assert an open-drain RESET signal upon undervoltage or manual reset assertion. It delivers 1.12 V threshold accuracy (±0.5% typical), 2.4 μA typical supply current, and user-adjustable delay from 1.25 ms to 10 s-enabling reliable power-on reset in battery-powered microcontroller systems.
For engineers reviewing the TPS3808G12DBVTG4 datasheet, TPS3808G12DBVTG4 pinout, TPS3808G12DBVTG4 application, or TPS3808G12DBVTG4 equivalent, this page provides verified functional identity, SOT-23-6 package mapping, confirmed 6-pin terminal roles, exact threshold and delay specifications, and two validated alternative parts for voltage-monitoring supervisory use cases.
Technical Context
The TPS3808G12DBVTG4 implements a precision voltage comparator with built-in hysteresis (1% typical) and an on-chip 220 nA current source that charges an external capacitor on the CT pin to control reset timeout. Its SENSE input monitors 1.2 V rails with ±0.5% threshold accuracy over –40°C to 125°C, while the MR pin supports logic-level manual reset with 90 kΩ internal pull-up.
RESET is open-drain with VOL ≤ 0.4 V at 1 mA (VDD ≥ 1.8 V), compatible with 10 kΩ–1 MΩ pull-up resistors. The device operates across 1.7 V–6.5 V supply range and draws only 2.4 μA typical IDD-making it suitable for always-on monitoring in portable and industrial embedded systems where leakage and quiescent power are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage (VIT) | 1.12 V ±0.5% typical - precisely matches 1.2 V nominal rail with minimal margin loss for robust brownout detection. |
| Quiescent Current (IDD) | 2.4 μA typical at 3.3 V - enables multi-year operation from coin-cell batteries in standby monitoring applications. |
| Reset Delay Range | 1.25 ms to 10 s via CT capacitor - supports fast de-bounce (e.g., 1.25 ms) or long hold-off (e.g., 10 s) without external timing ICs. |
| Operating Temperature | –40°C to 125°C - fully specified for automotive under-hood, industrial PLC, and high-reliability embedded environments. |
| Supply Voltage Range | 1.7 V to 6.5 V - accommodates wide-input systems including Li-ion, 3.3 V, and 5 V domains without level-shifting. |
| Output Type | Open-drain RESET - allows voltage translation up to 6.5 V and wired-OR configuration with other reset sources. |
| Hysteresis (VHYS) | 1% of VIT - prevents chatter during slow-rising/falling supply transitions near threshold. |
Pinout & Package
SOT-23-6 (DBV) package: 2.90 mm × 1.60 mm body, surface-mount, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Open-drain output | Asserts low-impedance state during undervoltage or MR event; requires external pull-up (10 kΩ–1 MΩ) to set logic-high voltage. |
| 2 - GND | Ground reference | Primary return path for internal circuitry and CT capacitor discharge; must connect to low-impedance system ground plane. |
| 3 - MR | Manual reset input | Logic-low (≤0.3×VDD) triggers immediate RESET assertion; internally pulled up to VDD via 90 kΩ resistor. |
| 4 - CT | Delay programming input | Controls reset timeout: open = 20 ms, tied to VDD via 40–200 kΩ = 300 ms, or capacitor-to-GND = 1.25 ms–10 s. |
| 5 - SENSE | Voltage monitoring input | Direct connection to 1.2 V rail; comparator asserts RESET when voltage drops below 1.12 V (±0.5%). |
| 6 - VDD | Power supply input | Accepts 1.7–6.5 V; requires 0.1 μF ceramic decoupling capacitor placed adjacent to pin per analog design best practice. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 1.12 V threshold | ±0.5% typical accuracy ensures consistent brownout detection across temperature and supply variation-critical for 1.2 V core logic reliability. |
| Programmable reset delay | Three configuration modes (open, resistor-to-VDD, capacitor-to-GND) eliminate need for external RC networks or timers in most designs. |
| Ultra-low 2.4 μA quiescent current | Enables permanent supervision of battery-backed systems without measurable impact on shelf life or runtime. |
| –40°C to 125°C operation | Validated performance across full automotive and industrial junction temperature range without derating or thermal compensation. |
| Open-drain RESET with 6.5 V tolerance | Supports mixed-voltage systems: RESET can be pulled up to higher rails (e.g., 3.3 V or 5 V) than VDD, simplifying interface to diverse MCUs. |
Applications
| Microcontroller Power-On Reset | Battery-Powered IoT Sensor Node |
|---|---|
|
Use Scenario: Ensures clean boot sequence for ARM Cortex-M or RISC-V microcontrollers after cold start or brownout recovery. IC Role / Device Role / Timing Role: Supervisory circuit asserting open-drain RESET until 1.2 V core rail stabilizes and remains above 1.12 V for ≥20 ms (CT-open default). Use Value: Prevents firmware corruption by guaranteeing CPU reset duration exceeds minimum POR requirement of modern MCUs. |
Use Scenario: Maintains system integrity in wireless sensor nodes powered by CR2032 or Li-SOCl₂ cells operating intermittently for years. IC Role / Device Role / Timing Role: Low-IDD voltage monitor enabling continuous rail supervision with <2.5 μA draw-extending battery life beyond 10 years in sleep mode. Use Value: Eliminates need for discrete MOSFET-based reset circuits or high-leakage comparators, reducing BOM count and PCB area. |
| FPGA Configuration Monitoring | Industrial PLC I/O Module |
|
Use Scenario: Validates 1.2 V FPGA core voltage before initiating configuration bitstream loading from external SPI flash. IC Role / Device Role / Timing Role: Threshold detector triggering RESET if SENSE falls below 1.12 V during power ramp, blocking config until stable. Use Value: Avoids partial configuration failures and metastability by enforcing strict voltage compliance prior to FPGA startup. |
Use Scenario: Provides fail-safe reset for programmable logic controllers deployed in factory automation cabinets with wide ambient temperature swings. IC Role / Device Role / Timing Role: High-accuracy supervisor operating from –40°C to 125°C, asserting RESET during undervoltage events on 1.2 V auxiliary rails. Use Value: Meets IEC 61000-4-2/4-4 immunity requirements through precise threshold and hysteresis-reducing field failure rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-monitoring supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G12DBVR | Same silicon, tape-and-reel packaging (3000 pcs), no "TG4" suffix - identical electrical specs and SOT-23-6 footprint. | No functional difference; selected for volume production vs. sample quantities. | Preferred for high-volume manufacturing due to standard reel packaging and broader distributor availability. |
| MAX6326UT12+T | Fixed 1.2 V threshold, 200 ms fixed delay, 1.5 μA IDD, SOT-23-5 package - lacks CT programmability and MR input. | Used where fixed delay suffices and board space is constrained; not suitable for adjustable-timing or manual-reset designs. | Choose only when delay flexibility and MR functionality are unnecessary-saves cost but sacrifices design adaptability. |
Compared with TPS3808G12DBVTG4, TPS3808G12DBVR offers identical performance in volume-friendly packaging, while MAX6326UT12+T trades programmability and pin count for lower quiescent current and reduced footprint-requiring layout revision and functional validation for replacement.
Availability
TPS3808G12DBVTG4 is available at Aetrix Electronics and suitable for microcontroller power-on reset, battery-powered IoT sensor nodes, FPGA configuration monitoring, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TPS3808G12DBVTG4 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 delivering analog and embedded processing solutions, with leadership in power management, signal chain, and high-reliability ICs for industrial, automotive, and communications markets.
The TPS3808 family is engineered for precision voltage supervision in resource-constrained embedded systems-emphasizing ultra-low quiescent current, tight threshold accuracy, and flexible reset timing to replace discrete reset circuits in MCU, FPGA, and ASIC applications.
FAQ
What is the exact threshold voltage and accuracy of the TPS3808G12DBVTG4?
The TPS3808G12DBVTG4 has a nominal threshold voltage of 1.12 V with ±0.5% typical accuracy over –40°C to 125°C for VIT ≤ 3.3 V. This is factory-trimmed and specified in TI's SBVS050M datasheet Section 5 (Device Voltage Thresholds) and Section 7.5 (Electrical Characteristics). The 1.12 V value ensures reliable monitoring of 1.2 V rails with appropriate hysteresis margin.
How is the reset delay time configured on the TPS3808G12DBVTG4?
The TPS3808G12DBVTG4 supports three reset delay configurations via the CT pin: open-circuit yields 20 ms, connection to VDD via 40–200 kΩ resistor yields 300 ms, and connection to a capacitor (≥100 pF) to GND enables user-programmable delays from 1.25 ms to 10 s. The delay is generated by an internal 220 nA current source charging the external capacitor to 1.23 V, as detailed in Section 8.3.2 of the datasheet.
Does the TPS3808G12DBVTG4 support manual reset functionality?
Yes, the TPS3808G12DBVTG4 includes a dedicated MR (manual reset) input (Pin 3). Driving MR low (≤0.3×VDD) immediately asserts RESET regardless of SENSE voltage. MR features an internal 90 kΩ pull-up to VDD, allowing it to be left unconnected when unused. This function is confirmed in Pin Function Table 6-1 and Section 8.3.3 of the official datasheet.
What package type and pin count does the TPS3808G12DBVTG4 use?
The TPS3808G12DBVTG4 uses the SOT-23-6 (DBV) package: 6-pin, surface-mount, 2.90 mm × 1.60 mm body size, with pins arranged as RESET–GND–MR–CT–SENSE–VDD (top view). This is explicitly documented in the Device Information table and Figure 6-1 of the SBVS050M datasheet, and confirmed by TI's orderable addendum.
Can the TPS3808G12DBVTG4 monitor voltages other than 1.2 V?
No-the TPS3808G12DBVTG4 is a fixed-threshold variant optimized exclusively for 1.2 V rails (VIT = 1.12 V). To monitor other voltages, TI offers alternate part numbers: e.g., TPS3808G33 for 3.3 V (3.07 V threshold) or TPS3808G01 for adjustable thresholds down to 0.405 V. This distinction is clearly defined in Table 5-1 (Device Voltage Thresholds) of the datasheet.
TPS3808G12DBVTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.12V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
TPS3808G12DBVTG4 FAQ
1.How can I place an order for TPS3808G12DBVTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3808G12DBVTG4 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 TPS3808G12DBVTG4 reliable?
The price and inventory of TPS3808G12DBVTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3808G12DBVTG4 is usually 5 days.
3.What payment methods are accepted for TPS3808G12DBVTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3808G12DBVTG4 transactions.
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4.How is shipping managed for TPS3808G12DBVTG4?
TPS3808G12DBVTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3808G12DBVTG4 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 TPS3808G12DBVTG4?
For technical support, including TPS3808G12DBVTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3808G12DBVTG4 requirements.
6.How does Aetrix verify that TPS3808G12DBVTG4 is sourced from the original manufacturer or authorized distributors?
All TPS3808G12DBVTG4 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 TPS3808G12DBVTG4 meets industry standards.
7.What is the process for return or replacement of TPS3808G12DBVTG4?
All TPS3808G12DBVTG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3808G12DBVTG4, 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 TPS3808G12DBVTG4 part is unused and in its original packaging.
Return procedure for TPS3808G12DBVTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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