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Texas Instruments TPS3839E16DBZT
- Part No.:
- TPS3839E16DBZT
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TPS3839E16DBZT.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
TPS3839E16DBZT from Texas Instruments is an ultralow-power voltage supervisor IC designed for single-rail supply monitoring in battery-critical systems. It features a factory-trimmed 1.52 V reset threshold, 150 nA typical supply current, push-pull RESET output, and valid operation down to 0.6 V VDD - enabling reliable power-on reset in sub-1.8 V alkaline or Li-ion single-cell applications.
For engineers reviewing the TPS3839E16DBZT datasheet, TPS3839E16DBZT pinout, TPS3839E16DBZT application, or TPS3839E16DBZT equivalent, key selection criteria include its 1.52 V threshold accuracy (±1% at 25°C), 200 ms reset delay, SOT-23-3 package compatibility, and transient rejection capability for fast VDD dips.
Technical Context
The TPS3839E16DBZT implements a precision comparator-based supervision architecture with built-in hysteresis (15 mV typical) to prevent chatter during threshold crossing. Its sampling scheme draws only ~15 µA for ~200 µs per cycle, sustaining average quiescent current at 150 nA across –40°C to +85°C.
Unlike the TPS3831 variant, the TPS3839E16DBZT omits the manual reset (MR) input and uses a 3-pin SOT-23 package - simplifying layout while retaining full voltage monitoring functionality, push-pull drive strength (2 mA sink), and immunity to transients ≥20 µs duration at 1.52 V threshold overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.52 V ±1% (25°C); ensures precise brownout detection for 1.5 V nominal rails |
| Supply Current | 150 nA typical; enables >10-year battery life in coin-cell–powered wearables |
| Operating Voltage | 0.9 V to 6.5 V; supports single alkaline, Li-ion, or multi-rail industrial supplies |
| Reset Delay | 200 ms typical; provides sufficient de-bounce time after power recovery |
| Output Type | Push-pull active-low RESET; eliminates external pull-up and drives MCU reset pins directly |
| Valid Reset Down To | VDD ≥ 0.6 V; guarantees deterministic reset assertion even during deep discharge |
| Temperature Range | –40°C to +85°C; qualified for industrial and portable outdoor environments |
Pinout & Package
SOT-23-3 package (2.92 mm × 2.37 mm), surface-mount, lead-free, RoHS-compliant; thermal pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Accepts 0.9–6.5 V; powers internal circuitry and enables reset assertion below 1.52 V |
| GND | Ground reference | Return path for supply and RESET output; must be low-impedance to avoid sampling error |
| RESET | Active-low reset output | Push-pull driver sinks 2 mA; asserts low when VDD < 1.52 V and holds for 200 ms post-recovery |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 150 nA typical enables >10-year shelf life in battery-backed metering devices |
| Precision factory-trimmed threshold | 1.52 V ±1% eliminates need for external resistor divider calibration |
| Transient immunity | Rejects VDD dips <20 µs duration, preventing false resets in noisy power environments |
| Wide supply range | 0.9–6.5 V operation supports direct interface with single-cell alkaline (0.9–1.7 V) and 3.3/5 V rails |
| Push-pull output | Drives microcontroller reset pins without external pull-up, reducing BOM count and board area |
Applications
| Portable Medical Sensors | Smart Utility Meters |
|---|---|
Use Scenario: Glucose monitor powered by CR2032 coin cell operating from 3.0 V down to 2.0 V. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET when battery drops below 1.52 V to halt measurement and preserve residual charge. Use Value: Prevents corrupted ADC readings and firmware crashes during brownout, extending usable battery life by 18% versus fixed-threshold alternatives. | Use Scenario: AMI smart meter using single alkaline AA cell in cold-weather deployment (–25°C). IC Role / Device Role / Timing Role: Monitors supply rail and triggers controlled shutdown before EEPROM write corruption occurs. Use Value: Maintains ±1% threshold accuracy across –40°C to +85°C, eliminating recalibration and field failure due to temperature drift. |
| Wearable Fitness Trackers | Industrial IoT Edge Nodes |
Use Scenario: BLE-enabled wristband with Li-ion pouch cell discharging from 4.2 V to 3.0 V. IC Role / Device Role / Timing Role: Supervises system VDD and forces MCU reset if voltage falls below 1.52 V during deep sleep mode. Use Value: 150 nA current draw reduces sleep-mode load by 92% vs. standard supervisors, adding 4.7 days to 30-day battery runtime. | Use Scenario: Wireless sensor node powered by energy harvester with intermittent 1.2–5.5 V output. IC Role / Device Role / Timing Role: Validates stable power before enabling RF transceiver and sensor acquisition logic. Use Value: Valid reset assertion down to 0.6 V ensures reliable boot sequencing even during ultra-low-energy harvesting pulses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3839G12DBZT | 1.1 V reset threshold; otherwise identical electrical specs and SOT-23-3 package | Targets 1.2 V logic rails or dual-cell NiMH systems instead of 1.5 V alkaline | Select when supervising lower-voltage domains where 1.52 V threshold would cause premature reset |
| MAX6375XR22+T | 2.2 V threshold, 1.6 µA supply current, SC70-3 package, no hysteresis spec | Higher current draw limits use in multi-year battery applications; lacks transient rejection data | Consider only for cost-sensitive, non-battery applications where 1.52 V threshold is unavailable |
Compared with TPS3839G12DBZT and MAX6375XR22+T, the TPS3839E16DBZT delivers optimal trade-off between precision (±1%), ultra-low power (150 nA), and robust transient immunity - making it the preferred choice for long-life 1.5 V rail supervision.
Availability
TPS3839E16DBZT is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, wearable fitness trackers, and industrial IoT edge nodes requiring stable component supply and guaranteed long-term manufacturability.
Supply support for TPS3839E16DBZT 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 for industrial, automotive, and personal electronics markets.
The TPS383x product line was designed specifically for ultralow-power voltage supervision in battery-constrained applications - emphasizing sub-200 nA operation, factory-trimmed thresholds, and robust transient rejection without external components.
FAQ
What is the reset threshold voltage of the TPS3839E16DBZT?
The TPS3839E16DBZT has a factory-trimmed negative-going reset threshold voltage of 1.52 V with ±1% accuracy at 25°C. This value remains stable across –40°C to +85°C, with typical hysteresis of 15 mV to prevent oscillation near the threshold. The device asserts active-low RESET whenever VDD falls below this threshold and holds it for 200 ms after VDD rises above (1.52 V + hysteresis).
Does the TPS3839E16DBZT support manual reset functionality?
No, the TPS3839E16DBZT does not include a manual reset (MR) input. That feature is exclusive to the TPS3831 family (e.g., TPS3831E16DQNR). The TPS3839E16DBZT is a 3-pin SOT-23 device with VDD, GND, and RESET terminals only - simplifying design for applications requiring only supply-voltage monitoring without external reset control.
What is the minimum supply voltage required for valid RESET assertion in the TPS3839E16DBZT?
The TPS3839E16DBZT guarantees valid RESET assertion down to VDD = 0.6 V, as specified by the V(POR) parameter in the Electrical Characteristics table. Below 0.6 V, the RESET output state is undefined and must not be relied upon. This capability allows the TPS3839E16DBZT to provide deterministic reset behavior deeper into battery discharge than most competing supervisors.
Can the TPS3839E16DBZT drive a microcontroller's bidirectional reset pin directly?
Yes, but with caution: the TPS3839E16DBZT's push-pull RESET output can drive a bidirectional reset pin, provided a series current-limiting resistor (e.g., 100 Ω–1 kΩ) is placed between RESET and the MCU pin. This prevents excessive current flow if both devices attempt to drive the line simultaneously - a requirement explicitly noted in TI's Application Report SBVS193D Section 9.2.2.2.
What bypass capacitor is recommended for the TPS3839E16DBZT VDD pin?
A 0.1 µF ceramic capacitor is recommended adjacent to the VDD pin of the TPS3839E16DBZT. This mitigates voltage droop caused by the device's periodic 15 µA, ~200 µs sampling current - especially critical when sourced from high-impedance supplies (e.g., resistive dividers or long PCB traces). TI confirms this value in Sections 9.2.2.1 and 11.1 of the SBVS193D datasheet.
TPS3839E16DBZT 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:
- 1.52V
- 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
TPS3839E16DBZT FAQ
1.How can I place an order for TPS3839E16DBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3839E16DBZT 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 TPS3839E16DBZT reliable?
The price and inventory of TPS3839E16DBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3839E16DBZT is usually 5 days.
3.What payment methods are accepted for TPS3839E16DBZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3839E16DBZT transactions.
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4.How is shipping managed for TPS3839E16DBZT?
TPS3839E16DBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3839E16DBZT 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 TPS3839E16DBZT?
For technical support, including TPS3839E16DBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3839E16DBZT requirements.
6.How does Aetrix verify that TPS3839E16DBZT is sourced from the original manufacturer or authorized distributors?
All TPS3839E16DBZT 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 TPS3839E16DBZT meets industry standards.
7.What is the process for return or replacement of TPS3839E16DBZT?
All TPS3839E16DBZT units undergo pre-shipment inspection (PSI). If there is an issue with TPS3839E16DBZT, 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 TPS3839E16DBZT part is unused and in its original packaging.
Return procedure for TPS3839E16DBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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