Texas Instruments TLV803MDBZT

Overview

TLV803MDBZT from Texas Instruments is a 3-pin voltage supervisor IC with active-low, open-drain RESET output, designed for power-on reset generation and supply voltage monitoring in embedded systems. It features a fixed 4.38 V threshold voltage (V_IT–), 200 ms reset delay, 9 µA typical supply current, and operates across –40°C to +125°C - used in industrial power-rail supervision for microcontrollers and FPGAs.

For engineers reviewing the TLV803MDBZT datasheet, TLV803MDBZT pinout, TLV803MDBZT application, or TLV803MDBZT equivalent, this page delivers verified functional identity, SOT-23 package mapping, precise threshold and timing specs, real-world use cases, and two confirmed alternative parts with documented technical and application differences.

Technical Context

The TLV803MDBZT implements a precision bandgap-based voltage comparator with internal hysteresis (60 mV) and an integrated 200 ms timer to ensure reliable power-on reset assertion. Its open-drain RESET output supports wired-OR configurations and level-shifting up to 6 V, independent of V_DD.

It asserts RESET when V_DD falls below 4.38 V (V_IT–) and holds it low for ≥120 ms after V_DD rises above that threshold. The device enters high-impedance state below 1.1 V V_DD, enabling clean power-down behavior without external pull-downs.

Key Specifications

Pinout & Package

SOT-23 (DBZ) package, 3-pin, body size 2.92 mm × 1.30 mm, surface-mount, RoHS-compliant, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803SDBZT and MAX803M, TLV803MDBZT uniquely combines 4.38 V precision threshold, guaranteed 200 ms delay, 9 µA ultra-low current, and full automotive-grade temperature qualification - making it the optimal choice for new 5-V industrial designs requiring robustness and efficiency.

Availability

TLV803MDBZT is available at Aetrix Electronics and suitable for factory automation, electricity meters, and building automation systems requiring stable component supply, long-term lifecycle support, and AEC-Q200-aligned reliability.

Supply support for TLV803MDBZT 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 IC design.

The TLV8x3 family was engineered specifically for cost-sensitive, space-constrained embedded systems needing dependable power-on reset and brown-out protection - prioritizing low quiescent current, precise thresholds, and seamless integration into 3.3-V and 5-V supply architectures.

FAQ

What is the exact threshold voltage of the TLV803MDBZT?

The TLV803MDBZT has a nominal negative-going input threshold voltage (V_IT–) of 4.38 V, with a guaranteed range of 4.28 V to 4.48 V over –40°C to +125°C. This value is factory-trimmed and specified in the Electrical Characteristics table of the official datasheet (SBVS157E), making it suitable for precise 5-V rail supervision without external calibration.

Does the TLV803MDBZT support wired-OR reset configurations?

Yes, the TLV803MDBZT supports wired-OR reset configurations due to its open-drain RESET output. Multiple TLV803MDBZT devices can share a single pull-up resistor on the RESET line, allowing logical OR-ing of reset conditions across different supply rails - for example, combining 3.3-V and 5-V supervision without additional logic gates.

Can the TLV803MDBZT drive a 5-V logic input when monitoring a 3.3-V supply?

No - the TLV803MDBZT is configured for 4.38 V threshold and is intended for 5-V rail supervision. To monitor a 3.3-V supply and drive a 5-V logic input, use TLV803SDBZT (2.93 V threshold) with the same open-drain output, which allows pulling RESET up to 5 V independently of its 3.3-V V_DD. TLV803MDBZT itself is not rated for 3.3-V V_DD operation below its 1.1 V minimum.

What is the minimum VDD required for TLV803MDBZT to assert a valid RESET signal?

The TLV803MDBZT begins asserting a valid RESET signal when V_DD exceeds 1.1 V - this is the power-up reset voltage defined in Section 7.5 of the datasheet. Below 1.1 V, the output enters high-impedance state; above it, the device actively monitors V_DD against the 4.38 V threshold and generates reset pulses accordingly.

Is the TLV803MDBZT pin-compatible with the MAX803 series?

Yes, the TLV803MDBZT is explicitly stated as pin-for-pin compatible with MAX803 in the official datasheet Features section. Both use SOT-23-3 (DBZ) package with identical VDD–GND–RESET pinout and open-drain output behavior, enabling direct substitution in legacy designs - though TLV803MDBZT offers lower current (9 µA vs. ~15 µA) and tighter temperature specification.