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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Texas Instruments TLV803RDBZR

Name: TLV803RDBZR
Brand: Texas Instruments
SKU: TLV803RDBZR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLV803RDBZR

Manufacturer:: Texas Instruments

Category:: Supervisors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: TLV803RDBZR.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23-3

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Product details

Overview

TLV803RDBZR from Texas Instruments is a 3-pin SOT-23 voltage supervisor IC with active-low, open-drain RESET output, 2.64 V threshold voltage (V_IT–), 200 ms fixed reset delay, and 9 µA typical supply current. It monitors power rails in microcontroller-based systems and asserts RESET when V_DD drops below 2.64 V or during power-up until V_DD exceeds 1.1 V.

For engineers reviewing the TLV803RDBZR datasheet, TLV803RDBZR pinout, TLV803RDBZR application, or TLV803RDBZR equivalent, this device serves as a precision, low-power reset supervisor for industrial and embedded systems requiring stable 2.64 V rail monitoring, transient immunity, and operation across –40°C to +125°C.

Technical Context

The TLV803RDBZR implements a precision bandgap reference and internal timer to generate a fixed 200 ms reset pulse after V_DD rises above its 2.64 V negative-going threshold (V_IT–). Its open-drain RESET output supports wired-OR configurations and level shifting up to 6 V, independent of V_DD.

It features built-in V_DD transient rejection with 10 µs minimum pulse width (t_w) detection, hysteresis of 35 mV, and valid output behavior down to 1.1 V supply - enabling reliable reset assertion during brownout and startup in DSP, FPGA, and ASIC power management circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
V_IT– Threshold	2.64 V ±60 mV - precisely monitors 2.6 V-class rails; ensures reset assertion before logic corruption occurs.
Reset Delay (t_d)	200 ms typ (120–280 ms range) - guarantees sufficient system initialization time after power stabilization.
Supply Current (I_DD)	9 µA typ at 2 V - enables battery-backed and ultra-low-power applications without compromising supervision accuracy.
Output Type	Open-drain RESET - allows multi-supervisor OR-ing, flexible pull-up voltage selection (up to 6 V), and bidirectional reset pin interfacing.
Operating Temp	–40°C to +125°C - qualified for under-hood automotive, factory automation, and industrial control environments.
V_OL @ 500 µA	0.3 V max at V_DD = 2–6 V - ensures robust low-state drive into CMOS inputs even with weak pull-ups or long traces.
Hysteresis (V_hys)	35 mV - prevents chatter during slow-rising/falling supply transitions near threshold.

Pinout & Package

SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration with gull-wing leads.

Pin/Terminal	Circuit Role	Design Meaning
1 (GND)	Ground reference	Return path for internal circuitry; must be connected to system ground plane for stable threshold and noise immunity.
2 (RESET)	Open-drain reset output	Active-low signal asserted when V_DD < 2.64 V; requires external 10 kΩ–1 MΩ pull-up; supports level shifting beyond V_DD.
3 (V_DD)	Supply input	Monitored power rail input (1.1–6 V); decoupling capacitor (0.1 µF ceramic) required adjacent to pin for transient immunity.

Key Features

Feature	Design Value
Fixed 200 ms reset timeout	Guarantees deterministic system initialization timing without external RC components or firmware dependency.
2.64 V precision threshold	Matches common 2.6 V LDO outputs and intermediate logic rails; eliminates need for external resistor dividers.
9 µA typical quiescent current	Extends battery life in portable equipment and enables always-on supervision in energy-constrained nodes.
V_DD transient rejection	Rejects fast glitches ≥10 µs duration, preventing spurious resets in electrically noisy industrial or motor-control environments.
–40°C to +125°C operation	Validated performance across full automotive-grade temperature range without derating or calibration.

Applications

Factory Automation	Portable Equipment
Use Scenario: PLC I/O modules powered by isolated 3.3 V rails subject to EMI-induced voltage sags. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to ARM Cortex-M7 MCU upon rail dip below 2.64 V. Use Value: Prevents firmware lockup during electromagnetic interference events by guaranteeing clean, timed reset recovery.	Use Scenario: Handheld medical meter with coin-cell backup and main Li-ion supply. IC Role / Device Role / Timing Role: Monitors 2.6 V analog front-end rail; triggers hardware reset if battery voltage falls below safe ADC operating level. Use Value: Enables fail-safe shutdown before sensor data corruption, using only 9 µA quiescent current during standby.
Servers	Electricity Meters
Use Scenario: 12 V-to-2.64 V point-of-load regulator feeding FPGA configuration circuitry. IC Role / Device Role / Timing Role: TLV803RDBZR supervises the 2.64 V rail and holds FPGA in reset until stable post-PoL startup. Use Value: Eliminates FPGA configuration errors caused by premature release from reset due to PoL overshoot or settling delay.	Use Scenario: Revenue-grade electricity meter with tamper-detection logic and real-time clock. IC Role / Device Role / Timing Role: Supervises 2.6 V RTC backup supply; asserts RESET on brownout to preserve metering registers and prevent billing errors. Use Value: Ensures metrological integrity during grid instability by enforcing deterministic reset sequence before volatile memory loss.

Factory Automation

Portable Equipment

Use Scenario: PLC I/O modules powered by isolated 3.3 V rails subject to EMI-induced voltage sags.

IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to ARM Cortex-M7 MCU upon rail dip below 2.64 V.

Use Value: Prevents firmware lockup during electromagnetic interference events by guaranteeing clean, timed reset recovery.

Use Scenario: Handheld medical meter with coin-cell backup and main Li-ion supply.

IC Role / Device Role / Timing Role: Monitors 2.6 V analog front-end rail; triggers hardware reset if battery voltage falls below safe ADC operating level.

Use Value: Enables fail-safe shutdown before sensor data corruption, using only 9 µA quiescent current during standby.

Servers

Electricity Meters

Use Scenario: 12 V-to-2.64 V point-of-load regulator feeding FPGA configuration circuitry.

IC Role / Device Role / Timing Role: TLV803RDBZR supervises the 2.64 V rail and holds FPGA in reset until stable post-PoL startup.

Use Value: Eliminates FPGA configuration errors caused by premature release from reset due to PoL overshoot or settling delay.

Use Scenario: Revenue-grade electricity meter with tamper-detection logic and real-time clock.

IC Role / Device Role / Timing Role: Supervises 2.6 V RTC backup supply; asserts RESET on brownout to preserve metering registers and prevent billing errors.

Use Value: Ensures metrological integrity during grid instability by enforcing deterministic reset sequence before volatile memory loss.

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV803SDBZR	2.93 V threshold (vs. 2.64 V); identical pinout, timing, and quiescent current.	Designed for 3.3 V rail supervision instead of 2.6 V; not interchangeable without verifying system voltage margin.	Select TLV803SDBZR only when monitoring 3.3 V supplies where 2.93 V trip point provides adequate headroom.
MAX803R	Same 2.64 V threshold and SOT-23-3 package; higher 15 µA typical I_DD; no specified V_DD transient rejection.	Lacks documented glitch immunity; less suitable for high-noise factory or motor-drive environments.	Choose MAX803R only in cost-sensitive, low-EMI applications where 6 µA higher quiescent current is acceptable.

Compared with TLV803SDBZR and MAX803R, the TLV803RDBZR uniquely delivers 2.64 V precision supervision with industry-leading 9 µA supply current and validated 10 µs transient rejection - making it optimal for battery-powered, noise-prone, or thermally demanding 2.6 V rail monitoring.

Availability

TLV803RDBZR is available at Aetrix Electronics and suitable for factory automation, portable equipment, and electricity metering applications requiring stable component supply, extended temperature support, and long-term production continuity.

Supply support for TLV803RDBZR 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 specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and high-reliability IC design.

The TLV803RDBZR belongs to TI's TLV8x3 voltage supervisor family, engineered for precision power-on reset and brownout protection in space-constrained, thermally aggressive embedded systems.

FAQ

What is the exact reset threshold voltage of TLV803RDBZR?

The TLV803RDBZR has a nominal negative-going input threshold voltage (V_IT–) of 2.64 V, with a guaranteed range of 2.58 V to 2.70 V over –40°C to +125°C. This value is factory-trimmed and does not require external calibration. The 2.64 V threshold makes TLV803RDBZR suitable for monitoring 2.6 V LDO outputs and intermediate logic rails where precise brownout detection is critical.

Does TLV803RDBZR support multiple supply monitoring via wired-OR?

Yes, TLV803RDBZR supports wired-OR reset bus configurations because its RESET pin is open-drain. Multiple TLV803RDBZR devices (e.g., monitoring 2.64 V and 3.3 V rails) can share a single pull-up resistor and common RESET line. Only one device asserting low will hold the entire bus low - enabling system-wide reset if any monitored rail fails. No additional logic or diodes are required.

Can TLV803RDBZR drive a 5 V logic input while powered from a 2.6 V supply?

Yes, TLV803RDBZR's open-drain RESET output supports level shifting: its output can be pulled up to voltages up to 6 V, independent of V_DD. When TLV803RDBZR is powered from a 2.6 V rail but its RESET pin is pulled to 5 V, it reliably drives 5 V CMOS logic inputs. This capability is explicitly confirmed in the datasheet's "Output Level Shifting" section and Figure 9-2.

What is the minimum supply voltage at which TLV803RDBZR begins generating valid RESET output?

TLV803RDBZR begins asserting valid RESET output when V_DD exceeds 1.1 V. Below 1.1 V, the internal circuitry is nonfunctional and the RESET pin enters high-impedance state. This 1.1 V power-up reset voltage ensures early fault detection during ramp-up and is lower than the 2.64 V trip threshold - providing guaranteed reset assertion before the monitored rail reaches operational levels.

Is TLV803RDBZR pin-compatible with MAX803 series devices?

Yes, TLV803RDBZR is explicitly stated as pin-for-pin compatible with MAX803 in the official datasheet. Both use identical SOT-23 (DBZ) 3-pin package with matching pin 1 (GND), pin 2 (RESET), and pin 3 (V_DD) assignments. However, TLV803RDBZR offers lower quiescent current (9 µA vs. ~15 µA) and documented V_DD transient rejection - making it a functional upgrade without PCB changes.

TLV803RDBZR 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:: 2.64V

Output:: Open Drain or Open Collector

Reset:: Active Low

Reset Timeout:: 120ms Minimum

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

TLV803RDBZR FAQ

1.How can I place an order for TLV803RDBZR through Aetrix?

Please submit a Request for Quotation (RFQ) for TLV803RDBZR 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 TLV803RDBZR reliable?

The price and inventory of TLV803RDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV803RDBZR is usually 5 days.

3.What payment methods are accepted for TLV803RDBZR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV803RDBZR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLV803RDBZR?

TLV803RDBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLV803RDBZR 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 TLV803RDBZR?

For technical support, including TLV803RDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV803RDBZR requirements.

6.How does Aetrix verify that TLV803RDBZR is sourced from the original manufacturer or authorized distributors?

All TLV803RDBZR 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 TLV803RDBZR meets industry standards.

7.What is the process for return or replacement of TLV803RDBZR?

All TLV803RDBZR units undergo pre-shipment inspection (PSI). If there is an issue with TLV803RDBZR, 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 TLV803RDBZR part is unused and in its original packaging.

Return procedure for TLV803RDBZR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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