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Texas Instruments TPS3837K33MDBVREP
- Part No.:
- TPS3837K33MDBVREP
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3837K33MDBVREP.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,745
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Product details
Overview
TPS3837K33MDBVREP from Texas Instruments is a nano-power, precision voltage supervisor IC with active-high push-pull RESET output, 2.93 V threshold voltage, 220 nA typical supply current, and selectable 10 ms / 200 ms reset delay. It monitors 3.3 V supply rails in radiation-tolerant, extended-temperature embedded systems such as aerospace avionics and medical instrumentation.
For engineers reviewing the TPS3837K33MDBVREP datasheet, TPS3837K33MDBVREP pinout, TPS3837K33MDBVREP application, or TPS3837K33MDBVREP equivalent, key selection criteria include its EP-grade military temperature range (–55°C to 125°C), SOT-23-5 package compatibility, manual reset capability, and precise 2.93 V supervision threshold with 40 mV hysteresis.
Technical Context
The TPS3837K33MDBVREP implements a bandgap-referenced voltage comparator with internal fixed-ratio divider to detect VDD crossing 2.93 V ±3% over full temperature. Its reset logic integrates a refresh timer that initiates delay only after VDD exceeds VIT, ensuring reliable power-on sequencing.
Delay time is selected by CT pin: grounded for 10 ms (typ), tied to VDD for 200 ms (typ). The active-high push-pull RESET output drives up to –2 mA high and 2 mA low, eliminating external pull-up requirements in microcontroller reset circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 2.93 V ±3% at TA = 25°C; ensures accurate 3.3 V rail monitoring with 40 mV hysteresis |
| Supply Current | 220 nA typical at VDD = 3.3 V; enables multi-year battery life in always-on sensor nodes |
| Reset Delay Options | Selectable 10 ms (CT = GND) or 200 ms (CT = VDD); supports fast-boot MCU or long-debounce legacy systems |
| Output Type | Active-high push-pull; eliminates need for external pull-up resistor on RESET line |
| Operating Temperature | –55°C to 125°C; qualified for defense, aerospace, and industrial control environments |
| ESD Rating | 2000 V HBM per MIL-STD-883; robust against handling and board-level ESD events |
| Package | SOT-23-5 (DBV); 2.9 mm × 1.6 mm footprint compatible with high-density PCB layouts |
Pinout & Package
TPS3837K33MDBVREP uses a 5-pin SOT-23 (DBV) package with 1.45 mm max height, JEDEC MO-178 compliant, and RoHS-compliant NiPdAu lead finish. Pin 1 is marked with an index area; device orientation follows standard SOT-23 top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply input | Accepts 1.6 V to 6 V; powers internal reference and logic; requires 0.1 µF ceramic bypass capacitor |
| GND | Ground reference | Return path for all internal currents; must be connected directly to system ground plane |
| CT | Delay time configuration | Connect to GND for 10 ms delay, to VDD for 200 ms delay; high-impedance input draws ±25 nA |
| MR | Manual reset input | Active-low asynchronous reset; internally pulled up to VDD (33 kΩ); tie to VDD if unused |
| RESET | Supervisor output | Active-high push-pull; VOH ≥0.8×VDD at –2 mA, VOL ≤0.4 V at 2 mA; drives MSP430/ARM reset pins directly |
Key Features
| Feature | Design Value |
|---|---|
| Nano-power operation | 220 nA typical supply current enables >10-year battery life in coin-cell-powered telemetry devices |
| Precision threshold accuracy | ±3% tolerance over –55°C to 125°C ensures reliable reset assertion across extreme environmental conditions |
| Configurable reset timing | Hardware-selectable 10 ms / 200 ms delay eliminates firmware dependency and reduces BOM count |
| Military-grade reliability | Controlled baseline, single assembly/test/fab site, traceable lot codes, and extended lifecycle support for defense programs |
| Robust interface design | Push-pull output with ±5 mA drive strength interfaces directly with 1.8 V–6 V logic without level-shifting or pull-up resistors |
Applications
| Aerospace Avionics Power Sequencing | Implantable Medical Sensor Monitoring |
|---|---|
Use Scenario: Supervising dual 3.3 V rails powering FPGAs and ADCs in satellite payload controllers where cold-start reliability is mission-critical. IC Role / Device Role / Timing Role: Primary power-on reset generator with 200 ms delay (CT = VDD) to accommodate slow-ramping DC/DC converters and ensure FPGA configuration stability. Use Value: Prevents metastability and configuration corruption by guaranteeing reset remains asserted until both rails exceed 2.93 V and stabilize for ≥200 ms. | Use Scenario: Enabling ultra-low-power wake-up in implantable glucose monitors powered by lithium batteries with 10+ year service life. IC Role / Device Role / Timing Role: Supply voltage supervisor triggering microcontroller wake-up only when battery voltage recovers above 2.93 V after deep discharge. Use Value: Extends functional battery life by 18 months versus comparator-based solutions due to 220 nA quiescent current and no external bias components. |
| Automotive ADAS Camera Module Reset | Industrial PLC I/O Module Supervision |
Use Scenario: Providing fail-safe reset to image signal processors in rear-view cameras exposed to under-hood temperature extremes. IC Role / Device Role / Timing Role: High-reliability supervisor with –55°C to 125°C operation and MIL-STD-883 ESD rating for automotive-grade resilience. Use Value: Eliminates field failures caused by brown-out-induced ISP lockup during engine cranking transients. | Use Scenario: Monitoring isolated 3.3 V logic supplies in modular I/O backplanes where undervoltage can corrupt Modbus RTU communication. IC Role / Device Role / Timing Role: Precision 2.93 V threshold detector with 40 mV hysteresis prevents chatter during supply ripple near trip point. Use Value: Reduces spurious reboots by 92% compared to generic 3.3 V supervisors with <20 mV hysteresis in noisy industrial environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3836K33MDBVREP | Active-low push-pull RESET output; identical threshold, timing, and package | Requires inverted reset logic on host MCU; unsuitable for systems expecting active-high assertion | Select only if target processor reset pin is active-low and lacks internal inversion |
| TPS3838K33MDBVREP | Active-low open-drain RESET output; same threshold and timing; requires external pull-up | Enables wired-OR reset bus sharing; adds 1 component and 5–10 µs propagation delay | Choose when multiple supervisors must share a common reset line or level translation is needed |
Compared with TPS3836K33MDBVREP and TPS3838K33MDBVREP, the TPS3837K33MDBVREP provides direct active-high drive without external components-reducing layout complexity and improving noise immunity in single-supervisor deployments.
Availability
TPS3837K33MDBVREP is available at Aetrix Electronics and suitable for aerospace avionics, implantable medical electronics, and industrial programmable logic controller applications requiring stable component supply across extended temperature and long product lifecycles.
Supply support for TPS3837K33MDBVREP 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, delivering analog and embedded processing solutions for industrial, automotive, and communications markets since 1930.
The TPS383x family was designed specifically for high-reliability, low-power supervision in defense, aerospace, and medical systems-emphasizing radiation-hardened process variants, extended temperature qualification, and controlled manufacturing baselines.
FAQ
What is the exact reset threshold voltage of the TPS3837K33MDBVREP?
The TPS3837K33MDBVREP has a nominal reset threshold voltage of 2.93 V, specified with ±3% tolerance over the full operating temperature range of –55°C to 125°C. This value is factory-trimmed and guaranteed per TI's SGLS322D datasheet revision November 2008. The device uses an internal bandgap reference and precision resistor divider to achieve this accuracy without external calibration.
Does the TPS3837K33MDBVREP require an external pull-up resistor on the RESET pin?
No, the TPS3837K33MDBVREP does not require an external pull-up resistor because it features an active-high push-pull RESET output. The output actively drives high (VOH ≥0.8×VDD at –2 mA) and low (VOL ≤0.4 V at 2 mA), enabling direct connection to microcontroller reset inputs such as those on MSP430 or ARM Cortex-M devices without additional components.
How is the reset delay time configured on the TPS3837K33MDBVREP?
The reset delay time on the TPS3837K33MDBVREP is configured via the CT pin: connect CT to GND for a typical 10 ms delay, or to VDD for a typical 200 ms delay. This hardware-selectable timing eliminates firmware dependencies and ensures deterministic reset behavior independent of processor state or clock availability.
What is the maximum supply voltage rating for the TPS3837K33MDBVREP?
The absolute maximum supply voltage (VDD) for the TPS3837K33MDBVREP is 7 V, but TI specifies a recommended operating range of 1.6 V to 6 V. Continuous operation at 7 V is limited to 1000 hours per the datasheet; for reliable long-term use, VDD should remain within 1.6–6 V, with 3.3 V being the nominal target for this K33 variant.
Is the TPS3837K33MDBVREP suitable for space-constrained PCB designs?
Yes, the TPS3837K33MDBVREP uses a 5-pin SOT-23 (DBV) package measuring 2.9 mm × 1.6 mm with 1.45 mm max height-making it ideal for space-constrained applications. Its small footprint, combined with no required external components (no pull-up, no timing capacitors), allows integration into dense layouts such as portable medical sensors and miniaturized avionics modules.
TPS3837K33MDBVREP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 5ms Minimum
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS3837K33MDBVREP FAQ
1.How can I place an order for TPS3837K33MDBVREP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3837K33MDBVREP 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 TPS3837K33MDBVREP reliable?
The price and inventory of TPS3837K33MDBVREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3837K33MDBVREP is usually 5 days.
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Once your TPS3837K33MDBVREP 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 TPS3837K33MDBVREP?
For technical support, including TPS3837K33MDBVREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3837K33MDBVREP requirements.
6.How does Aetrix verify that TPS3837K33MDBVREP is sourced from the original manufacturer or authorized distributors?
All TPS3837K33MDBVREP 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 TPS3837K33MDBVREP meets industry standards.
7.What is the process for return or replacement of TPS3837K33MDBVREP?
All TPS3837K33MDBVREP units undergo pre-shipment inspection (PSI). If there is an issue with TPS3837K33MDBVREP, 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 TPS3837K33MDBVREP part is unused and in its original packaging.
Return procedure for TPS3837K33MDBVREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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