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Texas Instruments TLV803ED29DBZR
- Part No.:
- TLV803ED29DBZR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TLV803ED29DBZR.pdf
- Description:
- LOW-POWER VOLTAGE SUPERVISOR
- Quantity:
- Payment:
- Shipping:
Inventory:8,661
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Product details
Overview
TLV803ED29DBZR from Texas Instruments is an open-drain, active-low voltage supervisor IC designed for reliable power-on reset and brownout detection in ultra-low-power systems. It features a 2.93 V threshold voltage (±0.5% typical accuracy), 50 ms fixed reset delay, 250 nA typical supply current, and operation from 0.7 V to 6 V supply - enabling use in battery-backed microcontrollers, energy-harvesting nodes, and portable instrumentation.
For engineers reviewing the TLV803ED29DBZR datasheet, TLV803ED29DBZR pinout, TLV803ED29DBZR application, or TLV803ED29DBZR equivalent, key selection criteria include its SOT-23-3 (DBZ) package with pin 1 = RESET, guaranteed reset assertion down to 0.7 V VPOR, integrated glitch immunity (10 µs), and compatibility with legacy MAX803/TPS3809 designs.
Technical Context
The TLV803ED29DBZR implements a precision bandgap-referenced comparator with built-in hysteresis (1.2% typical VHYS) to prevent chatter during slow-rising or noisy VDD transitions. Its internal timer enforces a fixed 50 ms reset timeout after VDD exceeds VIT+ (2.93 V + hysteresis), ensuring stable processor initialization.
As an open-drain device, it requires an external pull-up resistor on the RESET pin - supporting flexible logic-level translation and wired-OR configurations. The MR (manual reset) input is absent in the 3-pin DBZ variant, confirming this part lacks manual reset functionality per its pinout and package configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 0.7 V to 6 V - ensures valid reset output even during deep brownout or low-voltage battery discharge. |
| Threshold Voltage (VIT–) | 2.93 V ±0.5% (typ) - factory-trimmed for high-accuracy monitoring of 3.3 V rails without external components. |
| Reset Delay (tD) | 50 ms (variant D) - provides sufficient hold time for FPGA, MCU, or ASIC core initialization after power stabilization. |
| Quiescent Current (IDD) | 250 nA (typ), ≤1 µA @ 3.3 V - enables multi-year operation in coin-cell-powered IoT endpoints. |
| Output Topology | Open-drain, active-low - allows level-shifting, shared reset buses, and compatibility with both 1.8 V and 5 V logic domains. |
| Operating Temperature | –40°C to +125°C - qualified for industrial automation, automotive body electronics, and smart metering environments. |
| VPOR (Power-On Reset) | 700 mV - guarantees defined reset state during ultra-slow power ramp-up, critical for LDO-based power sequencing. |
Pinout & Package
SOT-23-3 (DBZ) package, 2.90 mm × 1.30 mm body size, with pin 1 = RESET, pin 2 = GND, pin 3 = VDD - confirmed by TI's Device Nomenclature Figure 5-1 (D = 50 ms delay, 29 = 2.93 V threshold, R = R-pinout DBZ).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1: RESET | Active-low open-drain output | Drives low when VDD < 2.93 V; requires external pull-up; sinks up to 2 mA at 3.3 V for robust MCU reset assertion. |
| Pin 2: GND | Ground reference | Primary return path for internal circuitry; must be connected to system ground plane with low-impedance trace. |
| Pin 3: VDD | Supply and monitored rail input | Both powers the IC and serves as the voltage being supervised; supports glitch immunity filtering for transients ≥10 µs. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 250 nA typical supply current enables >10-year battery life in always-on sensor nodes. |
| High threshold accuracy | ±0.5% typical VIT– tolerance eliminates need for calibration or trimming in precision 3.3 V rail monitoring. |
| Integrated glitch immunity | 10 µs minimum pulse rejection prevents false resets from ESD or switching noise on VDD lines. |
| Wide VPOR range | Valid reset output down to 0.7 V ensures deterministic behavior during cold-start or capacitor discharge scenarios. |
| Industry-standard footprint | SOT-23-3 (DBZ) package enables drop-in replacement of MAX803, TPS3809, and APX803 without PCB redesign. |
Applications
| Smart Electricity Meter | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Monitors backup battery voltage and main 3.3 V rail during power failover events in revenue-grade meters. IC Role / Device Role / Timing Role: Voltage supervisor providing 50 ms active-low reset pulse to microcontroller upon brownout, ensuring EEPROM write integrity and secure state recovery. Use Value: 250 nA IQ extends 10-year battery life; ±0.5% threshold accuracy maintains metrology compliance across temperature. |
Use Scenario: Supervises isolated 3.3 V digital supply powering FPGA configuration memory and communication peripherals. IC Role / Device Role / Timing Role: Open-drain RESET output interfaces directly with FPGA PROG_B pin and shares bus with other supervisors via wired-OR. Use Value: 0.7 V VPOR guarantees reset assertion during undervoltage lockout of upstream DC/DC converters. |
| Portable Medical Sensor | Building Automation Controller |
|
Use Scenario: Ensures reliable boot sequence in Bluetooth LE-enabled wearable devices powered by single-cell Li-ion (2.7–4.2 V). IC Role / Device Role / Timing Role: Detects VDD falling below 2.93 V and asserts reset for 50 ms to halt analog front-end sampling during low-battery shutdown. Use Value: 125°C rating supports operation inside sealed enclosures; SOT-23-3 footprint minimizes board area in space-constrained wearables. |
Use Scenario: Supervises 3.3 V rail feeding ARM Cortex-M7 MCU and RS-485 transceivers in HVAC control panels exposed to wide ambient swings. IC Role / Device Role / Timing Role: Provides deterministic reset timing independent of LDO startup delay, preventing firmware lockup during cold start. Use Value: –40°C to +125°C operation ensures reliability in unconditioned mechanical rooms; 2.93 V threshold matches common MCU VDD min spec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX803SUR29+T | Same 2.93 V threshold, 50 ms delay, SOT-23-3, but higher IQ (1.2 µA typ) and narrower temp range (–40°C to +85°C). | Lacks 125°C rating and ultra-low IQ - unsuitable for extended outdoor or high-temp industrial deployments. | Choose for cost-sensitive consumer applications where full industrial temp range is not required. |
| TPS3809K33DBVR | 2.93 V threshold, 200 ms delay (not 50 ms), same SOT-23-3 package, 350 nA IQ, and identical –40°C to +125°C rating. | Longer reset timeout may cause boot failures in systems requiring fast initialization or tight power sequencing. | Use only if 200 ms delay aligns with system firmware requirements; verify compatibility with existing timing margins. |
Compared with MAX803SUR29+T and TPS3809K33DBVR, TLV803ED29DBZR delivers the lowest quiescent current (250 nA) and tightest threshold accuracy (±0.5%) within the same SOT-23-3 footprint - making it optimal for long-life, high-precision, and thermally demanding embedded systems.
Availability
TLV803ED29DBZR is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, portable medical sensors, and building automation controllers requiring stable component supply across extended temperature and multi-year field deployment.
Supply support for TLV803ED29DBZR 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 high-reliability industrial and automotive ICs.
The TLV803E family was engineered specifically for ultra-low-power, high-accuracy voltage supervision in battery-critical and thermally harsh applications - extending system uptime while minimizing design overhead.
FAQ
What is the exact reset threshold voltage of TLV803ED29DBZR?
The TLV803ED29DBZR has a factory-programmed falling threshold voltage (VIT–) of 2.93 V with ±0.5% typical accuracy across –40°C to +125°C. This value is laser-trimmed during production and does not require external resistors or calibration - ensuring consistent performance in 3.3 V rail monitoring applications.
Does TLV803ED29DBZR support manual reset (MR) functionality?
No, TLV803ED29DBZR does not include a manual reset (MR) pin. The SOT-23-3 DBZ package used for this variant has only three terminals: RESET (pin 1), GND (pin 2), and VDD (pin 3). MR functionality is exclusive to the 5-pin X2SON (DPW) package variants of the TLV803E family.
What is the minimum supply voltage at which TLV803ED29DBZR guarantees a valid reset output?
TLV803ED29DBZR guarantees a defined reset output state down to VPOR = 700 mV. Below this voltage, the RESET pin behavior is undefined. This low VPOR enables reliable operation during slow power ramp-up or deep brownout conditions where other supervisors may fail to assert reset.
Can TLV803ED29DBZR replace MAX803 in existing designs?
Yes, TLV803ED29DBZR is pin-to-pin compatible with MAX803 in the SOT-23-3 package and offers superior specifications: 250 nA vs. 1.2 µA IQ, ±0.5% vs. ±2.5% threshold accuracy, and –40°C to +125°C vs. –40°C to +85°C operation - enabling direct upgrade without layout changes.
What pull-up resistor value is recommended for the open-drain RESET output of TLV803ED29DBZR?
A 10 kΩ pull-up resistor to the target logic rail (e.g., 3.3 V or 1.8 V) is recommended for TLV803ED29DBZR. This value ensures fast rise time (<100 ns) while limiting sink current to <330 µA at 3.3 V - well within the 2 mA absolute maximum rating and compatible with standard CMOS input leakage budgets.
TLV803ED29DBZR 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:
- 2.93V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 33ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
TLV803ED29DBZR FAQ
1.How can I place an order for TLV803ED29DBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV803ED29DBZR 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 TLV803ED29DBZR reliable?
The price and inventory of TLV803ED29DBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV803ED29DBZR is usually 5 days.
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TLV803ED29DBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV803ED29DBZR 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 TLV803ED29DBZR?
For technical support, including TLV803ED29DBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV803ED29DBZR requirements.
6.How does Aetrix verify that TLV803ED29DBZR is sourced from the original manufacturer or authorized distributors?
All TLV803ED29DBZR 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 TLV803ED29DBZR meets industry standards.
7.What is the process for return or replacement of TLV803ED29DBZR?
All TLV803ED29DBZR units undergo pre-shipment inspection (PSI). If there is an issue with TLV803ED29DBZR, 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 TLV803ED29DBZR part is unused and in its original packaging.
Return procedure for TLV803ED29DBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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