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Texas Instruments TPS3839G33DBZT
- Part No.:
- TPS3839G33DBZT
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TPS3839G33DBZT.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,119
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Product details
Overview
TPS3839G33DBZT from Texas Instruments is an ultralow-power voltage supervisor IC designed for supply monitoring in battery-critical systems. It features a factory-trimmed 3.08 V reset threshold, 150 nA typical supply current, push-pull active-low RESET output, and operates across 0.9 V to 6.5 V supply range - enabling reliable power-on reset in glucose monitors and wearables.
For engineers reviewing the TPS3839G33DBZT datasheet, TPS3839G33DBZT pinout, TPS3839G33DBZT application, or TPS3839G33DBZT equivalent, key selection criteria include its 200 ms reset delay, ±1% threshold accuracy at 25°C, transient rejection capability, valid reset assertion down to 0.6 V VDD, and SOT-23-3 package compatibility with space-constrained portable designs.
Technical Context
The TPS3839G33DBZT implements a precision bandgap-based voltage comparator with hysteresis (31 mV typical) to detect VDD drops below 3.08 V and assert RESET low. Its sampling architecture draws only ~15 µA for ~200 µs per measurement cycle, sustaining average current at 150 nA while rejecting fast transients on VDD.
No manual reset (MR) input is present - unlike the TPS3831 family - making it a dedicated single-supply monitor with simplified 3-pin interface. The push-pull output drives microcontroller reset pins directly without external pull-up, supporting IOL up to 2 mA and maintaining VOL ≤ 0.4 V across full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 V (factory-trimmed, ±1% accuracy at 25°C); ensures precise brownout detection for 3.3 V rail supervision |
| Supply Current | 150 nA typical (at 25°C); enables multi-year operation on coin-cell batteries in metering and wearables |
| Operating Voltage | 0.9 V to 6.5 V; supports single alkaline, Li-ion, and regulated 3.3 V/5 V supplies |
| Reset Delay | 200 ms typical; provides sufficient hold-off time for microcontroller initialization after power recovery |
| Output Type | Push-pull active-low RESET; eliminates need for external pull-up resistor and reduces BOM count |
| Valid Reset Down To | 0.6 V VDD; guarantees defined reset state during deep discharge or cold-start conditions |
| Hysteresis | 31 mV typical; prevents output oscillation near threshold during slow-rising or noisy supply rails |
Pinout & Package
SOT-23-3 package (2.92 mm × 2.37 mm), surface-mount, lead-free, RoHS-compliant, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Accepts 0.9–6.5 V; powers internal circuitry and enables reset assertion when below 3.08 V |
| GND | Ground reference | Return path for supply current and RESET output; must be low-impedance for stable threshold accuracy |
| RESET | Active-low push-pull output | Drives microcontroller reset pin directly; sinks up to 2 mA while holding VOL ≤ 0.4 V at VDD ≥ 2.8 V |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 150 nA typical enables >10-year battery life in always-on wearable sensors |
| Factory-trimmed threshold | 3.08 V ±1% eliminates external resistor divider calibration and improves system yield |
| Transient immunity | Rejects VDD glitches <20 µs duration and <31 mV amplitude below threshold - critical for noisy DC-DC outputs |
| Wide supply range | 0.9–6.5 V operation supports direct connection to single-cell alkaline (0.9–1.7 V) and 3.3 V/5 V rails |
| Defined reset at low VDD | Guaranteed valid RESET assertion down to 0.6 V VDD - ensures safe MCU reset even during deep brownout |
Applications
| Glucose Monitoring Devices | Portable Energy Meters |
|---|---|
|
Use Scenario: Continuous blood glucose sensing with Bluetooth LE transmission powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Monitors 3.3 V LDO output; asserts RESET if rail sags below 3.08 V during RF burst transmission. Use Value: Prevents firmware corruption by ensuring MCU resets cleanly before voltage collapse, extending usable battery life by avoiding premature shutdown. |
Use Scenario: Smart water/gas meter with 10-year battery life requirement and intermittent GSM reporting. IC Role / Device Role / Timing Role: Supervises primary 3.6 V lithium-thionyl chloride battery via resistive divider; triggers system reset on end-of-life voltage drop. Use Value: Enables accurate low-voltage cutoff at 3.08 V with ±1% tolerance - avoids false resets from load transients while maximizing energy extraction. |
| Wearable Fitness Trackers | Industrial Sensor Nodes |
|
Use Scenario: Ultra-thin wristband with integrated accelerometer, heart-rate sensor, and BLE SoC. IC Role / Device Role / Timing Role: Provides power-on reset and brownout protection for ARM Cortex-M0+ MCU running on 3.3 V buck converter output. Use Value: 150 nA current draw contributes negligibly to standby power budget; 200 ms delay ensures full SoC initialization before firmware execution. |
Use Scenario: Wireless vibration sensor node deployed in oil-field equipment with -40°C to +85°C ambient range. IC Role / Device Role / Timing Role: Supervises isolated 5 V supply feeding RS-485 transceiver and microcontroller; asserts RESET during AC line dips. Use Value: Stable 3.08 V threshold over full temperature range (±1% at 25°C, <±0.5% drift from –40°C to 85°C per Figure G003) ensures consistent trip point across operating envelope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3831G33DQNR | Same 3.08 V threshold and 150 nA current, but adds MR pin and uses 4-pin X2SON (1.0 mm × 1.0 mm) | Supports manual reset initiation and offers smaller footprint; requires PCB redesign for pin count and layout | Select when system-level reset coordination (e.g., watchdog timeout or button press) is required alongside supply monitoring |
| MAX6373KSA+T | 3.08 V threshold, 1.6 µA supply current, open-drain output, SOT23-3 package | Higher current draw limits battery life; open-drain output requires external pull-up; less suitable for ultra-low-power wearables | Choose only if legacy design already uses MAX6373 and board space/layout cannot accommodate TPS3839G33DBZT's push-pull advantage |
Compared with TPS3831G33DQNR, the TPS3839G33DBZT saves one pin and simplifies layout but lacks manual reset; versus MAX6373KSA+T, it delivers 10× lower quiescent current and eliminates external components - making it optimal for new ultra-low-power designs where reset source is supply-only.
Availability
TPS3839G33DBZT is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor nodes, battery-powered meters, and wearable electronics requiring stable component supply with long-term lifecycle assurance.
Supply support for TPS3839G33DBZT 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 low-power design, precision analog, and high-reliability industrial components.
The TPS383x series was developed specifically for ultralow-power supply monitoring in battery-operated and energy-harvesting systems - prioritizing nanoscale current consumption, factory-trimmed accuracy, and robust transient immunity.
FAQ
What is the exact reset threshold voltage of the TPS3839G33DBZT?
The TPS3839G33DBZT has a factory-trimmed negative-going threshold voltage (VIT–) of 3.08 V, with ±1% accuracy at 25°C and typical hysteresis of 31 mV. This value is confirmed in the Electrical Characteristics table of the SBVS193D datasheet and applies specifically to the TPS3839G33DBZT variant in SOT-23-3 packaging.
Does the TPS3839G33DBZT support manual reset functionality?
No, the TPS3839G33DBZT does not include a manual reset (MR) input. That feature is exclusive to the TPS3831 family (e.g., TPS3831G33DQNR). The TPS3839G33DBZT is a 3-pin device (VDD, GND, RESET) with no MR pin - it responds only to VDD supply voltage conditions.
What is the minimum supply voltage at which the TPS3839G33DBZT guarantees valid RESET assertion?
The TPS3839G33DBZT guarantees valid RESET assertion down to 0.6 V VDD, as specified by the V(POR) parameter in Section 7.5 of the SBVS193D datasheet. Below this voltage, the RESET output state is undefined and should not be relied upon for system safety.
Can the TPS3839G33DBZT drive a microcontroller reset pin directly without external components?
Yes, the TPS3839G33DBZT features a push-pull RESET output capable of sinking up to 2 mA while maintaining VOL ≤ 0.4 V at VDD ≥ 2.8 V. This allows direct connection to standard CMOS microcontroller reset inputs without requiring an external pull-up resistor - reducing BOM count and board area.
How does the TPS3839G33DBZT handle fast voltage transients on the VDD line?
The TPS3839G33DBZT rejects fast transients on VDD through internal sampling architecture and hysteresis. As shown in Figure G013 of the SBVS193D datasheet, it ignores pulses shorter than ~20 µs and smaller than ~31 mV below the 3.08 V threshold - preventing false resets caused by switching regulator noise or load-step events.
TPS3839G33DBZT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 120ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
TPS3839G33DBZT FAQ
1.How can I place an order for TPS3839G33DBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3839G33DBZT 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 TPS3839G33DBZT reliable?
The price and inventory of TPS3839G33DBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3839G33DBZT is usually 5 days.
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Once your TPS3839G33DBZT 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 TPS3839G33DBZT?
For technical support, including TPS3839G33DBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3839G33DBZT requirements.
6.How does Aetrix verify that TPS3839G33DBZT is sourced from the original manufacturer or authorized distributors?
All TPS3839G33DBZT 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 TPS3839G33DBZT meets industry standards.
7.What is the process for return or replacement of TPS3839G33DBZT?
All TPS3839G33DBZT units undergo pre-shipment inspection (PSI). If there is an issue with TPS3839G33DBZT, 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 TPS3839G33DBZT part is unused and in its original packaging.
Return procedure for TPS3839G33DBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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