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Texas Instruments TPS3838J25DBVR
- Part No.:
- TPS3838J25DBVR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3838J25DBVR.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:9,668
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Product details
Overview
TPS3838J25DBVR from Texas Instruments is a nano-power voltage supervisor IC with 2.25 V threshold, open-drain active-low RESET output, selectable 10 ms or 200 ms reset delay via CT pin, 220 nA typical supply current, and operation over –40°C to 85°C - used for undervoltage monitoring in battery-powered microcontroller systems.
For engineers reviewing the TPS3838J25DBVR datasheet, TPS3838J25DBVR pinout, TPS3838J25DBVR application, or TPS3838J25DBVR equivalent, key selection criteria include its precise 2.25 V supervision threshold, ultra-low quiescent current, open-drain output requiring external pull-up, manual reset capability, and SOT-23-5 package compatibility with space-constrained portable designs.
Technical Context
The TPS3838J25DBVR integrates a precision voltage comparator with internal 2.25 V threshold (VIT), hysteresis of 40 mV, and a programmable reset timer controlled by the CT pin: grounded for 10 ms delay, tied to VDD for 200 ms delay. It asserts RESET low when VDD falls below VIT or MR is pulled low.
Its open-drain RESET output requires an external pull-up resistor (value specified per operating voltage), enabling wired-OR configurations and compatibility with diverse logic families. The device enters ultra-low-current mode (<400 nA) during normal supervision and draws only 10–15 µA when VDD is below threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.6 V to 6 V - supports single-cell Li-ion (3.6 V), alkaline, or regulated 3.3 V/2.5 V rails. |
| Threshold Voltage (VIT) | 2.25 V (typical), ±2.5% over temperature - ensures reliable 2.5 V system reset at defined undervoltage point. |
| Supply Current (IDD) | 220 nA (typical) at VDD > VIT - enables multi-year battery life in always-on monitoring applications. |
| Reset Delay Options | 10 ms (CT = GND) or 200 ms (CT = VDD) - configurable timing to meet processor power-up sequencing requirements. |
| Output Type | Active-low open-drain - requires external pull-up; allows level-shifting and shared reset bus with other open-drain devices. |
| Propagation Delay (tPHL) | 10 µs (max) - ensures fast response to supply collapse without introducing timing uncertainty in critical reset paths. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and extended commercial environments including portable instrumentation. |
Pinout & Package
TPS3838J25DBVR is housed in a 5-pin SOT-23 (DBV) package, 2.90 mm × 1.60 mm body size, with gull-wing leads and RoHS-compliant NiPdAu finish. Thermal resistance RθJA is 153.6°C/W on standard JEDEC low-K board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power input | Monitored supply rail; device operates and supervises only when ≥1.6 V; absolute max 7 V. |
| GND | Ground reference | Analog and digital ground return; must be low-impedance connection for stable threshold accuracy. |
| CT | Delay configuration | Connect to GND for 10 ms reset delay, or to VDD for 200 ms delay; high-impedance input (±25 nA leakage). |
| MR | Manual reset input | Active-low asynchronous reset trigger; internal 30 kΩ pull-up; tie to VDD if unused to minimize current. |
| RESET | Open-drain output | Active-low reset signal; requires external pull-up resistor (e.g., 10–100 kΩ); sinks up to 5 mA. |
Key Features
| Feature | Design Value |
|---|---|
| Nano-power operation | 220 nA typical supply current enables >10-year battery life in coin-cell–powered IoT sensors. |
| Precision 2.25 V threshold | Guaranteed 2.18–2.29 V over –40°C to +85°C ensures deterministic reset behavior for 2.5 V systems. |
| Selectably timed reset | Hardware-configurable 10 ms / 200 ms delay eliminates need for external RC timing components or firmware delays. |
| Manual reset support | Dedicated MR pin with internal 30 kΩ pull-up simplifies board-level reset button integration without external biasing. |
| Open-drain flexibility | Allows shared reset bus, voltage-level translation, and compatibility with legacy microcontrollers requiring external pull-up. |
Applications
| Portable Medical Sensors | Lithium-Ion Battery Management |
|---|---|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell, requiring guaranteed MCU reset if battery drops below 2.4 V. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to MSP430 MCU upon undervoltage detection. Use Value: 220 nA quiescent current extends sensor runtime beyond 5 years; 2.25 V threshold aligns with battery end-of-life voltage. |
Use Scenario: Smart wearable with 3.6 V Li-ion cell, where system must halt operation before deep discharge damages battery. IC Role / Device Role / Timing Role: Supervisory circuit monitoring cell voltage and holding MCU in reset until safe recharging voltage is restored. Use Value: 200 ms delay (CT = VDD) prevents false resets during transient load spikes; open-drain output interfaces directly with fuel gauge IC. |
| Industrial Data Loggers | Low-Power Wireless Transceivers |
Use Scenario: Remote environmental logger using AA batteries and LoRaWAN radio, needing fail-safe reset if supply sags during transmission. IC Role / Device Role / Timing Role: System-level power supervisor triggering hardware reset of ARM Cortex-M0+ MCU and radio SoC simultaneously. Use Value: Manual reset (MR) enables field recovery via push-button; –40°C to +85°C rating ensures reliability in outdoor enclosures. |
Use Scenario: BLE beacon powered by primary lithium battery, requiring guaranteed initialization after cold start or brownout. IC Role / Device Role / Timing Role: Power-on reset generator ensuring transceiver firmware executes only after stable 3.3 V rail is confirmed. Use Value: 10 ms delay (CT = GND) satisfies fast-boot requirement of Nordic nRF52; SOT-23-5 footprint minimizes PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3836J25DBVR | Push-pull active-low RESET output; no external pull-up required; same 2.25 V threshold and 220 nA IQ. | Eliminates pull-up resistor but lacks wired-OR capability; better for simple point-to-point reset routing. | Choose when board layout simplicity and reduced BOM count outweigh need for shared reset bus. |
| MAX6375XR22-T | 2.2 V threshold, 1.6 µA IQ, 200 ms fixed delay, SOT-23-5; no CT pin or manual reset. | Higher supply current limits battery life; fixed delay removes design flexibility; no MR pin. | Acceptable only in cost-sensitive, non-battery-critical applications where 1.6 µA is acceptable. |
Compared with TPS3838J25DBVR, TPS3836J25DBVR offers identical supervision accuracy and ultra-low power but trades open-drain flexibility for push-pull simplicity, while MAX6375XR22-T sacrifices nano-power operation and configurability for lower unit cost in less demanding systems.
Availability
TPS3838J25DBVR is available at Aetrix Electronics and suitable for portable medical sensors, lithium-ion battery management systems, industrial data loggers, and low-power wireless transceivers requiring stable component supply across long production lifecycles.
Supply support for TPS3838J25DBVR 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 headquartered in Dallas, Texas, designing and manufacturing analog, embedded processing, and connectivity products for industrial, automotive, and consumer markets.
The TPS383x family was developed specifically for ultra-low-power voltage supervision in battery-operated and energy-harvesting systems, emphasizing nanoscale quiescent current, precision thresholds, and minimal external component count.
FAQ
What is the exact reset threshold voltage of the TPS3838J25DBVR?
The TPS3838J25DBVR has a nominal threshold voltage (VIT) of 2.25 V, with guaranteed range of 2.18 V to 2.29 V over –40°C to +85°C. This value is factory-trimmed and specified in the Electrical Characteristics table of the SLVS292F datasheet. The "J25" suffix explicitly denotes the 2.25 V variant within the TPS383x family.
Does the TPS3838J25DBVR require an external pull-up resistor on the RESET pin?
Yes, the TPS3838J25DBVR features an open-drain RESET output and requires an external pull-up resistor. The Recommended Operating Conditions specify a 10–100 kΩ range depending on VDD and capacitive loading. Typical value is 47 kΩ for 3.3 V systems. This differs from the push-pull TPS3836 variant, which does not require a pull-up.
How is the reset delay time configured on the TPS3838J25DBVR?
The reset delay time on the TPS3838J25DBVR is set by the CT pin: connect CT to GND for a typical 10 ms delay, or to VDD for a typical 200 ms delay. No external capacitor is needed. This hardware-selectable timing avoids firmware dependencies and ensures deterministic reset behavior independent of MCU state.
Can the TPS3838J25DBVR supervise a 1.8 V supply rail?
No - the TPS3838J25DBVR is specified for 2.25 V threshold and minimum operating voltage of 1.6 V, but it is not designed to supervise 1.8 V rails. For 1.8 V systems, TI recommends the TPS3838E18DBVR (1.71 V threshold). Using TPS3838J25DBVR on a 1.8 V rail would result in permanent RESET assertion since VDD < VIT.
What is the maximum supply voltage the TPS3838J25DBVR can tolerate on the VDD pin?
The TPS3838J25DBVR has an absolute maximum VDD rating of 7 V, as stated in Section 7.1 of the SLVS292F datasheet. Operation above 6 V is outside Recommended Operating Conditions and may impact reliability or parametric performance. For systems with transient-prone supplies, TI recommends clamping or filtering to stay within the 1.6–6 V operating range.
TPS3838J25DBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.25V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 10ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS3838J25DBVR FAQ
1.How can I place an order for TPS3838J25DBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3838J25DBVR 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 TPS3838J25DBVR reliable?
The price and inventory of TPS3838J25DBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3838J25DBVR is usually 5 days.
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Once your TPS3838J25DBVR 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 TPS3838J25DBVR?
For technical support, including TPS3838J25DBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3838J25DBVR requirements.
6.How does Aetrix verify that TPS3838J25DBVR is sourced from the original manufacturer or authorized distributors?
All TPS3838J25DBVR 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 TPS3838J25DBVR meets industry standards.
7.What is the process for return or replacement of TPS3838J25DBVR?
All TPS3838J25DBVR units undergo pre-shipment inspection (PSI). If there is an issue with TPS3838J25DBVR, 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 TPS3838J25DBVR part is unused and in its original packaging.
Return procedure for TPS3838J25DBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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