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

Texas Instruments TLV803SDBZT

Name: TLV803SDBZT
Brand: Texas Instruments
SKU: TLV803SDBZT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLV803SDBZT

Manufacturer:: Texas Instruments

Category:: Supervisors

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

Datasheet:: TLV803SDBZT.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23-3

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Product details

Overview

TLV803SDBZT from Texas Instruments is a 3-pin SOT-23 voltage supervisor IC with active-low, open-drain RESET output, precision 2.93 V threshold voltage (V_IT–), 200 ms fixed reset delay time, and 9 µA typical supply current. It monitors 3.3 V power rails in DSP/FPGA/ASIC systems to ensure reliable power-on initialization and brownout protection.

For engineers reviewing the TLV803SDBZT datasheet, TLV803SDBZT pinout, TLV803SDBZT application, or TLV803SDBZT equivalent, key selection criteria include its 2.93 V detection threshold, open-drain output compatible with 3.3 V CMOS logic, –40°C to +125°C operating range, transient rejection capability, and compatibility with multi-rail monitoring via wired-OR configuration.

Technical Context

The TLV803SDBZT implements a precision bandgap-based voltage reference and internal timer to generate a stable 200 ms reset pulse after V_DD exceeds 2.93 V. Its open-drain RESET output requires an external pullup resistor and supports level shifting up to 6 V - independent of V_DD.

It operates across 1.1 V to 6 V supply range and ignores fast transients via built-in pulse-width discrimination (t_w = 10 µs). The device asserts RESET when V_DD falls below 2.93 V and maintains assertion until V_DD rises above 2.93 V + 40 mV hysteresis, then delays deassertion for 200 ms.

Key Specifications

Parameter	Value and Actual Design Meaning
Threshold Voltage (V_IT–)	2.93 V ±60 mV - precisely monitors 3.3 V rails with guaranteed margin against nominal supply tolerance.
Reset Delay Time (t_d)	200 ms typ (120–280 ms) - ensures sufficient system stabilization before processor release from reset.
Supply Current (I_DD)	9 µA typ at 2 V - enables ultra-low-power operation in battery-backed or energy-sensitive applications.
Output Type	Open-drain RESET - allows wired-OR of multiple supervisors and flexible pullup voltage selection (up to 6 V).
Operating Temperature	–40°C to +125°C - qualified for industrial, automotive under-hood, and factory automation environments.
Power-Up Validity Threshold	1.1 V - RESET becomes valid early in power ramp, enabling robust initialization even with slow-rising supplies.
Hysteresis (V_hys)	40 mV - prevents oscillation during supply recovery near threshold and improves noise immunity.

Pinout & Package

SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount format with standard footprint and reflow profile (MSL Level-1).

Pin/Terminal	Circuit Role	Design Meaning
VDD	Supply input	Accepts 1.1 V to 6 V; requires 0.1 µF ceramic decoupling capacitor placed adjacent to pin for stability.
GND	Ground reference	Common return path for internal reference and output stage; must connect to low-impedance ground plane.
RESET	Open-drain output	Drives low when VDD < 2.93 V or during power-up delay; requires external 10 kΩ–1 MΩ pullup to defined logic-high voltage.

Key Features

Feature	Design Value
Precision 2.93 V threshold	Guaranteed ±60 mV tolerance over –40°C to +125°C enables accurate 3.3 V rail supervision without external calibration.
200 ms fixed reset delay	Internally timed delay eliminates need for external RC network, reducing BOM count and layout area.
Open-drain output with 6 V max pullup	Supports level-shifting and multi-supervisor wired-OR reset bus without logic-level translation components.
9 µA typical quiescent current	Minimizes standby power draw in portable, metering, and always-on embedded systems.
Transient rejection (t_w = 10 µs)	Immune to short-duration supply glitches, preventing spurious resets during switching noise or load transients.

Applications

Factory Automation	Portable Equipment
Use Scenario: Supervises 3.3 V I/O and logic rails in PLC modules, motor drives, and sensor nodes exposed to EMI-rich industrial environments. IC Role / Device Role / Timing Role: Voltage supervisor providing power-on reset and brownout detection for microcontrollers and FPGAs. Use Value: Prevents erratic behavior during line fluctuations by asserting RESET for ≥200 ms after supply recovery, ensuring deterministic firmware startup.	Use Scenario: Monitors battery-backed 3.3 V supply in handheld test instruments, medical wearables, and IoT edge sensors. IC Role / Device Role / Timing Role: Low-power reset generator that activates only when supply drops below 2.93 V, extending battery life. Use Value: 9 µA typical current draw minimizes quiescent drain; open-drain output enables direct interface to 1.8 V or 3.3 V host logic via appropriate pullup.
Servers	Electricity Meters
Use Scenario: Ensures clean boot sequence for baseboard management controllers (BMC) and FPGA-configurable power domains in rack-mounted servers. IC Role / Device Role / Timing Role: Precision voltage monitor with hysteresis and fixed delay, coordinating multi-rail sequencing. Use Value: 40 mV hysteresis prevents chatter during marginal supply conditions; 200 ms delay satisfies server BIOS reset timing requirements.	Use Scenario: Provides tamper-resistant power-fail detection and secure reset signaling in revenue-grade smart meters operating across wide temperature ranges. IC Role / Device Role / Timing Role: High-reliability supervisor qualified to –40°C to +125°C with precise 2.93 V threshold for 3.3 V metrology subsystems. Use Value: Guaranteed operation at extreme temperatures ensures consistent reset behavior during outdoor deployment and thermal cycling.

Factory Automation

Portable Equipment

Use Scenario: Supervises 3.3 V I/O and logic rails in PLC modules, motor drives, and sensor nodes exposed to EMI-rich industrial environments.

IC Role / Device Role / Timing Role: Voltage supervisor providing power-on reset and brownout detection for microcontrollers and FPGAs.

Use Value: Prevents erratic behavior during line fluctuations by asserting RESET for ≥200 ms after supply recovery, ensuring deterministic firmware startup.

Use Scenario: Monitors battery-backed 3.3 V supply in handheld test instruments, medical wearables, and IoT edge sensors.

IC Role / Device Role / Timing Role: Low-power reset generator that activates only when supply drops below 2.93 V, extending battery life.

Use Value: 9 µA typical current draw minimizes quiescent drain; open-drain output enables direct interface to 1.8 V or 3.3 V host logic via appropriate pullup.

Servers

Electricity Meters

Use Scenario: Ensures clean boot sequence for baseboard management controllers (BMC) and FPGA-configurable power domains in rack-mounted servers.

IC Role / Device Role / Timing Role: Precision voltage monitor with hysteresis and fixed delay, coordinating multi-rail sequencing.

Use Value: 40 mV hysteresis prevents chatter during marginal supply conditions; 200 ms delay satisfies server BIOS reset timing requirements.

Use Scenario: Provides tamper-resistant power-fail detection and secure reset signaling in revenue-grade smart meters operating across wide temperature ranges.

IC Role / Device Role / Timing Role: High-reliability supervisor qualified to –40°C to +125°C with precise 2.93 V threshold for 3.3 V metrology subsystems.

Use Value: Guaranteed operation at extreme temperatures ensures consistent reset behavior during outdoor deployment and thermal cycling.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV803RDBZT	2.64 V threshold voltage instead of 2.93 V; otherwise identical pinout, timing, and electrical specs.	Designed for 3.0 V or 2.8 V supply monitoring rather than 3.3 V rails.	Select TLV803RDBZT only when supervising lower-voltage domains where 2.64 V threshold provides appropriate margin.
MAX803SASA+	Pin-for-pin compatible but higher 15 µA typical supply current; same 2.93 V threshold and 200 ms delay.	Legacy industrial design with broader distributor availability but less optimized for ultra-low-power use cases.	Choose MAX803SASA+ if legacy qualification or second-source assurance is required, accepting higher quiescent current.

Compared with TLV803RDBZT and MAX803SASA+, the TLV803SDBZT delivers optimal accuracy and efficiency for 3.3 V rail supervision - offering tighter threshold tolerance, lowest quiescent current, and full temperature-range validation without trade-offs in delay stability or noise immunity.

Availability

TLV803SDBZT is available at Aetrix Electronics and suitable for factory automation, portable equipment, and electricity metering applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for TLV803SDBZT 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, embedded processing, and power management technologies, with leadership in high-reliability industrial and automotive ICs.

The TLV803SDBZT belongs to TI's TLV8x3 family of precision voltage supervisors, designed specifically for robust power-on reset and brownout protection in DSP, FPGA, and microcontroller-based systems operating across extended temperature ranges.

FAQ

What is the exact threshold voltage of the TLV803SDBZT and how is it specified?

The TLV803SDBZT has a nominal negative-going input threshold voltage (V_IT–) of 2.93 V, with guaranteed minimum 2.87 V and maximum 2.99 V over –40°C to +125°C. This value is factory-trimmed and specified in the Electrical Characteristics table of the official datasheet (SBVS157E), ensuring precise 3.3 V rail supervision without external adjustment.

Does the TLV803SDBZT require an external pullup resistor on the RESET pin?

Yes, the TLV803SDBZT features an open-drain RESET output and requires an external pullup resistor between RESET and a logic-high voltage source. Recommended values range from 10 kΩ to 1 MΩ; the pullup voltage may be up to 6 V and is not constrained by V_DD, enabling level-shifting functionality.

Can the TLV803SDBZT be used to monitor multiple voltage rails simultaneously?

Yes, the open-drain architecture of the TLV803SDBZT allows multiple units to share a common RESET line via wired-OR connection. For example, TLV803SDBZT (3.3 V rail) and TLV803MDBZT (5 V rail) can drive one combined reset signal with a single pullup resistor - triggering system reset if either rail fails.

What is the power-up behavior of the TLV803SDBZT when VDD rises from 0 V?

When V_DD rises from 0 V, the TLV803SDBZT begins asserting RESET once V_DD exceeds 1.1 V. RESET remains asserted until V_DD rises above 2.93 V, then stays low for 200 ms before releasing - ensuring the monitored system completes power stabilization before release from reset.

Is the TLV803SDBZT pin-compatible with other members of the TLV8x3 family?

Yes, the TLV803SDBZT shares identical pinout (VDD–GND–RESET) and package (SOT-23 DBZ) with TLV803RDBZT, TLV803MDBZT, TLV853SDBZT, and TLV863SDBZT. All TLV8x3 variants use the same 3-pin SOT-23 footprint and terminal assignment, enabling drop-in replacement within the same threshold variant group.

TLV803SDBZT 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:: 120ms Minimum

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

TLV803SDBZT FAQ

1.How can I place an order for TLV803SDBZT through Aetrix?

Please submit a Request for Quotation (RFQ) for TLV803SDBZT 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 TLV803SDBZT reliable?

The price and inventory of TLV803SDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV803SDBZT is usually 5 days.

3.What payment methods are accepted for TLV803SDBZT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV803SDBZT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLV803SDBZT?

TLV803SDBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLV803SDBZT 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 TLV803SDBZT?

For technical support, including TLV803SDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV803SDBZT requirements.

6.How does Aetrix verify that TLV803SDBZT is sourced from the original manufacturer or authorized distributors?

All TLV803SDBZT 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 TLV803SDBZT meets industry standards.

7.What is the process for return or replacement of TLV803SDBZT?

All TLV803SDBZT units undergo pre-shipment inspection (PSI). If there is an issue with TLV803SDBZT, 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 TLV803SDBZT part is unused and in its original packaging.

Return procedure for TLV803SDBZT:

1.Submit a request within 90 days.

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

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