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Texas Instruments TPS3837E18DBVR
- Part No.:
- TPS3837E18DBVR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3837E18DBVR.pdf
- Description:
- TPS3837 NANOPOWER SUPERVISORY CI
- Quantity:
- Payment:
- Shipping:
Inventory:1,500
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Product details
Overview
TPS3837E18DBVR from Texas Instruments is a nano-power, active-high push-pull supervisory circuit designed for reliable power-on reset and supply voltage supervision in ultra-low-power systems. It features a 1.71 V threshold voltage, 220 nA typical supply current, 10 ms or 200 ms selectable reset delay, and operates across –40°C to +85°C. It is used in battery-powered microcontroller applications such as MSP430-based portable instrumentation.
For engineers reviewing the TPS3837E18DBVR datasheet, TPS3837E18DBVR pinout, TPS3837E18DBVR application, or TPS3837E18DBVR equivalent, key selection criteria include its fixed 1.71 V detection threshold, active-high push-pull RESET output, SOT-23-5 package compatibility, and support for manual reset via MR pin - all critical for low-voltage, long-battery-life embedded designs.
Technical Context
The TPS3837E18DBVR integrates a precision band-gap reference, hysteresis-controlled voltage comparator, and an internal timer with CT-pin-selectable delay (10 ms or 200 ms). Its reset assertion begins when VDD rises above 1.1 V, and it remains active until VDD exceeds the 1.71 V threshold with sufficient overdrive.
Unlike open-drain or active-low variants, this device delivers an active-high push-pull RESET signal capable of sourcing up to –2 mA at 1.8 V, eliminating external pull-up requirements. The MR input supports manual reset with internal 30 kΩ pull-up, and CT pin logic (GND = 10 ms, VDD = 200 ms) enables flexible timing without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.6 V to 6 V - supports direct connection to 1.8 V rails and tolerates transient overshoot up to 7 V absolute max. |
| Reset Threshold Voltage (VIT) | 1.71 V (typical), ±3% over temperature - ensures reliable brownout detection for 1.8 V systems with margin. |
| Supply Current (IDD) | 220 nA (typical) at VDD > VIT - enables multi-year operation on coin-cell batteries in always-on monitoring nodes. |
| Reset Delay Time | Selectable 10 ms (CT = GND) or 200 ms (CT = VDD) - provides flexibility for fast-boot MCU initialization or slow-ramping power supplies. |
| RESET Output Type | Active-high push-pull - drives high without external pull-up, simplifies PCB layout and reduces BOM count. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and portable consumer environments without derating. |
| Hysteresis (VHYS) | 30 mV - prevents chatter during supply voltage recovery near threshold, improving system stability. |
Pinout & Package
SOT-23-5 (DBV) package: 2.9 mm × 1.6 mm × 1.15 mm body, gull-wing leads, RoHS-compliant green finish (CU NIPDAU), MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CT | Delay Configuration Input | Connect to GND for 10 ms reset delay; connect to VDD for 200 ms delay - no external timing components required. |
| 2 - GND | Ground Reference | Primary return path for internal reference and output stage; must be low-impedance and adjacent to VDD bypass capacitor. |
| 3 - MR | Manual Reset Input | Active-low input with internal 30 kΩ pull-up; driven low to force RESET assertion regardless of VDD level. |
| 4 - VDD | Power Supply Input | Monitored supply rail; powers internal circuitry and defines logic thresholds; requires 0.1 µF ceramic bypass capacitor. |
| 5 - RESET | Active-High Push-Pull Output | Drives high (≥0.8×VDD) when VDD ≥ VIT + hysteresis and delay expired; sinks current when asserted low during reset. |
Key Features
| Feature | Design Value |
|---|---|
| Nano-power operation | 220 nA typical supply current enables >10-year battery life in lithium coin-cell–powered IoT sensors. |
| Precision 1.71 V threshold | ±3% tolerance over –40°C to +85°C ensures robust reset behavior for 1.8 V core logic without calibration. |
| Selectably timed reset delay | Hardware-configurable 10 ms / 200 ms delay eliminates need for external RC networks or firmware timing loops. |
| Active-high push-pull output | Eliminates external pull-up resistor, reduces board space, and improves noise immunity vs. open-drain alternatives. |
| Manual reset capability | MR pin with internal pull-up allows system-level reset initiation without additional discrete components. |
Applications
| Portable Medical Sensors | MSP430-Based Data Loggers |
|---|---|
Use Scenario: Wearable ECG patch continuously monitors heart activity using a 1.8 V MSP430FR5969 MCU and CR2032 battery. IC Role / Device Role / Timing Role: Supervises 1.8 V supply rail and asserts RESET until stable; provides 10 ms delay for flash initialization. Use Value: 220 nA quiescent current extends battery life beyond 3 years; active-high output directly interfaces with MCU's RST/NMI pin. |
Use Scenario: Environmental data logger samples temperature/humidity every 5 minutes using MSP430F2013, powered by AA alkaline cells. IC Role / Device Role / Timing Role: Detects brownout during cold-weather battery discharge and triggers full system reset before data corruption. Use Value: 1.71 V threshold matches 1.8 V LDO dropout; 30 mV hysteresis prevents oscillation during gradual voltage recovery. |
| Wireless Sensor Nodes | Low-Power Industrial Controllers |
Use Scenario: Sub-GHz LoRaWAN node transmits sensor readings intermittently; sleeps at <1 µA between transmissions. IC Role / Device Role / Timing Role: Ensures clean power-up sequence for RF SoC and MCU after wake-from-sleep; MR pin tied to button for field service reset. Use Value: CT pin configured for 200 ms delay accommodates slow-ramping DC-DC converter output; SOT-23-5 footprint minimizes PCB area. |
Use Scenario: Programmable logic controller module uses 1.8 V FPGA configuration memory and real-time clock backup. IC Role / Device Role / Timing Role: Monitors main 3.3 V supply and generates reset pulse to FPGA upon undervoltage; MR pin connected to watchdog timer output. Use Value: Push-pull output drives FPGA's PROG_B pin directly; –40°C to +85°C rating ensures reliability in uncontrolled cabinet environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3836E18DBVR | Active-low push-pull RESET output; identical threshold (1.71 V), supply current, and package. | Requires inverted reset logic handling in MCU firmware or external inverter; unsuitable where active-high assertion is mandatory. | Select only if target MCU accepts active-low reset and board layout already accommodates pull-up or inversion. |
| TPS3838E18DBVR | Active-low open-drain RESET output; same threshold and quiescent current; requires external pull-up resistor. | Enables wired-OR reset bus sharing but adds component count and increases leakage risk in ultra-low-power sleep modes. | Prefer when multiple supervisors must share a common reset line or when interfacing with legacy 3.3 V logic families. |
Compared with TPS3837E18DBVR, TPS3836E18DBVR demands firmware-level polarity adaptation, while TPS3838E18DBVR introduces external component dependency and higher standby leakage - making TPS3837E18DBVR optimal for new 1.8 V MCU designs requiring minimal BOM and direct active-high reset drive.
Availability
TPS3837E18DBVR is available at Aetrix Electronics and suitable for portable medical sensors, wireless sensor nodes, and low-power industrial controllers requiring stable component supply with guaranteed long-term availability.
Supply support for TPS3837E18DBVR 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 leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in precision analog IC design.
The TPS383x family was engineered specifically for ultra-low-power supervisory functions in battery-critical applications - delivering nanoscale current consumption without sacrificing accuracy or timing control.
FAQ
What is the reset threshold voltage of the TPS3837E18DBVR?
The TPS3837E18DBVR has a nominal reset threshold voltage (VIT) of 1.71 V, with ±3% tolerance over the full –40°C to +85°C operating temperature range. This value is factory-trimmed and does not require external adjustment, making it ideal for stable 1.8 V system supervision. The TPS3837E18DBVR achieves this precision using an internal band-gap reference and resistor divider network.
Does the TPS3837E18DBVR require an external pull-up resistor on the RESET pin?
No, the TPS3837E18DBVR features an active-high push-pull RESET output and does not require an external pull-up resistor. It can source up to –2 mA at 1.8 V, directly driving MCU reset inputs. This eliminates a common BOM item and reduces PCB footprint - a key advantage over open-drain alternatives like the TPS3838E18DBVR, which mandates an external pull-up.
How is the reset delay time selected on the TPS3837E18DBVR?
The reset delay time on the TPS3837E18DBVR is selected via the CT pin: connecting CT to GND configures a 10 ms delay, while connecting CT to VDD selects a 200 ms delay. No external RC components are needed. This hardware-selectable timing provides deterministic reset behavior independent of firmware execution, ensuring reliable initialization even if the MCU fails to boot.
Can the TPS3837E18DBVR monitor supply voltages other than 1.8 V?
Yes - while the TPS3837E18DBVR is optimized for 1.8 V systems with its 1.71 V threshold, it operates across a 1.6 V to 6 V supply range and can supervise higher rails using external resistor dividers. However, the internal threshold is fixed; for 2.5 V, 3.0 V, or 3.3 V supervision, TI offers pin-compatible variants including TPS3837J25DBVR (2.25 V), TPS3837H30DBVR (2.79 V), and TPS3837K33DBVR (2.93 V).
What is the maximum supply voltage the TPS3837E18DBVR can withstand?
The TPS3837E18DBVR has an absolute maximum supply voltage (VDD) rating of 7 V. Under recommended operating conditions, it functions reliably from 1.6 V to 6 V. Exceeding 7 V risks permanent damage. All other pins (CT, MR, RESET) tolerate –0.3 V to VDD + 0.3 V, supporting safe interfacing with mixed-voltage logic domains without level shifters.
TPS3837E18DBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.71V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 10ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS3837E18DBVR FAQ
1.How can I place an order for TPS3837E18DBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3837E18DBVR 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 TPS3837E18DBVR reliable?
The price and inventory of TPS3837E18DBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3837E18DBVR is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3837E18DBVR transactions.
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4.How is shipping managed for TPS3837E18DBVR?
TPS3837E18DBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3837E18DBVR 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 TPS3837E18DBVR?
For technical support, including TPS3837E18DBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3837E18DBVR requirements.
6.How does Aetrix verify that TPS3837E18DBVR is sourced from the original manufacturer or authorized distributors?
All TPS3837E18DBVR 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 TPS3837E18DBVR meets industry standards.
7.What is the process for return or replacement of TPS3837E18DBVR?
All TPS3837E18DBVR units undergo pre-shipment inspection (PSI). If there is an issue with TPS3837E18DBVR, 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 TPS3837E18DBVR part is unused and in its original packaging.
Return procedure for TPS3837E18DBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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