Texas Instruments TLV803ZDBZT

Overview

TLV803ZDBZT from Texas Instruments is a 3-pin SOT-23 voltage supervisor IC with active-low, open-drain RESET output, precision 2.25 V threshold (±0.05 V), 200 ms fixed reset delay, and 9 µA typical supply current - used for power-on reset supervision in microcontroller and DSP systems operating from 1.1 V to 6 V.

For engineers reviewing the TLV803ZDBZT datasheet, TLV803ZDBZT pinout, TLV803ZDBZT application, or TLV803ZDBZT equivalent, this page delivers verified functional identity, exact pin mapping, thermal and timing specifications, real-world use cases in battery-powered equipment and industrial automation, and two validated alternative parts with documented differences.

Technical Context

The TLV803ZDBZT implements a precision bandgap-based voltage reference and internal timer to assert RESET when VDD falls below 2.25 V (VIT–) and hold it low for ≥120 ms after VDD rises above that threshold. Its open-drain output supports wired-OR configurations and level shifting up to 6 V independent of VDD.

It features built-in transient rejection (minimum pulse width tw = 10 µs), operates across –40°C to +125°C, and enters high-impedance state below 1.1 V supply - ensuring reliable reset assertion during brownout and startup without false triggering from fast supply noise.

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 TLV803ZDBZT, TLV803RDBZT shifts the detection point upward for higher-supply systems, while MAX803ZTR trades slightly higher current and shorter minimum delay for broader historical field deployment - both require validation of reset timing margins in new designs.

Availability

TLV803ZDBZT 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 guaranteed RoHS-compliant sourcing.

Supply support for TLV803ZDBZT 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 ICs.

The TLV803 family was designed specifically for cost-sensitive, low-power voltage monitoring in microcontroller-based systems - delivering precision reset functionality in minimal footprint without external components.

FAQ

What is the exact threshold voltage of the TLV803ZDBZT and how tightly is it specified?

The TLV803ZDBZT has a nominal negative-going input threshold voltage (VIT–) of 2.25 V, with a guaranteed range of 2.20 V to 2.30 V over the full –40°C to +125°C operating temperature range. This specification is confirmed in Section 7.5 of the official TI datasheet SBVS157E and applies directly to the TLV803ZDBZT variant, not the broader TLV803 family.

Does the TLV803ZDBZT support operation below 2.5 V, and what is its minimum functional supply voltage?

Yes, the TLV803ZDBZT operates with supply voltages as low as 1.1 V - the power-up reset voltage at which RESET becomes valid. It remains fully functional across 1.1 V to 6 V, enabling use in ultra-low-voltage systems such as energy-harvesting nodes or partially discharged battery applications. This behavior is explicitly defined in Section 7.4 and 7.5 of the TLV803ZDBZT datasheet.

Can the RESET output of the TLV803ZDBZT be pulled up to a voltage higher than VDD, and what is the maximum allowed?

Yes, the open-drain RESET output of the TLV803ZDBZT supports level shifting: it can be pulled up to a maximum of 6 V regardless of VDD value. This is confirmed in the Absolute Maximum Ratings table (Section 7.1) and Application section 9.1.2, enabling direct interfacing with 5 V logic even when monitoring a 2.5 V rail.

Is the TLV803ZDBZT pin-compatible with other members of the TLV803 family, and what are the key pinout differences?

The TLV803ZDBZT uses the standard TLV803 pinout: Pin 1 = GND, Pin 2 = RESET, Pin 3 = VDD. It is functionally and physically pin-compatible with TLV803RDBZT and TLV803SDBZT. TLV853 and TLV863 variants have alternate pinouts (e.g., RESET on Pin 1), so they are not drop-in replacements - only TLV803-series parts with "DBZ" suffix share identical pin mapping.

What is the guaranteed reset delay time for the TLV803ZDBZT, and does it vary with temperature or supply voltage?

The TLV803ZDBZT guarantees a reset delay time (td) of 120 ms minimum to 280 ms maximum, with 200 ms typical. This variation is primarily temperature-dependent - Figure 7-5 shows td ranging from ~170 ms at –40°C to ~220 ms at +125°C for TLV803Z. Supply voltage has negligible effect within 1.1 V–6 V range, as confirmed in the Switching Characteristics table (Section 7.6).