Texas Instruments TLV803EA26RDBZR

Overview

TLV803EA26RDBZR 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 2.64 V factory-programmed threshold (±0.5% typical accuracy), 200 ms fixed reset delay, 250 nA typical supply current at 3.3 V, and guaranteed operation down to 0.7 V VDD - enabling robust reset assertion in battery-backed or energy-harvesting applications such as portable medical sensors and smart metering endpoints.

For engineers reviewing the TLV803EA26RDBZR datasheet, TLV803EA26RDBZR pinout, TLV803EA26RDBZR application, or TLV803EA26RDBZR equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases, and validated alternative options - all grounded in TI's production-grade SLVSES2J datasheet (Rev J, May 2021).

Technical Context

The TLV803EA26RDBZR implements a precision bandgap-referenced comparator with built-in hysteresis (1.2% typical) to prevent chatter during slow-rising or noisy supply ramps. Its internal glitch immunity filter rejects transients ≤10 µs (at 5% overdrive), ensuring reset stability under EFT or switching noise.

As an open-drain output device, it requires an external pull-up resistor (not integrated) and supports bidirectional voltage translation - allowing RESET assertion into mixed-voltage domains (e.g., 1.8 V logic monitoring a 3.3 V rail). It asserts low when VDD falls below 2.64 V and holds for exactly 200 ms after VDD rises above VIT+ (2.64 V + VHYS).

Key Specifications

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 per Figure 6-3 and Table 6-1 of SLVSES2J Rev J.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EA26RDBZR, MAX803SUR26+T offers lower unit cost but sacrifices 6.4× higher quiescent current and lacks glitch immunity - critical for noisy factory floors; APX803S26-20SA-7 matches the 200 ms delay and open-drain topology but trades off accuracy and temperature range, limiting reliability in field-deployed infrastructure.

Availability

TLV803EA26RDBZR is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, portable medical sensors, and building automation controllers requiring stable component supply across long product lifecycles.

Supply support for TLV803EA26RDBZR 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 series belongs to TI's low-power voltage supervisor product line, engineered specifically for battery-constrained and thermally demanding applications where accuracy, ultra-low IQ, and extended temperature operation are non-negotiable.

FAQ

What is the exact reset threshold voltage of TLV803EA26RDBZR?

The TLV803EA26RDBZR has a factory-programmed falling threshold voltage (VIT–) of 2.64 V, with ±0.5% typical accuracy over –40°C to +125°C. This value is laser-trimmed during production and specified in Section 7.5 of the SLVSES2J datasheet. The rising threshold (VIT+) equals VIT– plus hysteresis (1.2% typical), resulting in ~2.672 V.

Does TLV803EA26RDBZR require an external pull-up resistor on the RESET pin?

Yes, TLV803EA26RDBZR uses an open-drain output and requires an external pull-up resistor to define the high state of the RESET signal. Typical values range from 10 kΩ to 100 kΩ, connected between RESET and the target logic rail (e.g., 1.8 V or 3.3 V). No pull-up is needed for push-pull variants like TLV809E.

What is the guaranteed minimum supply voltage for TLV803EA26RDBZR to assert a valid RESET?

TLV803EA26RDBZR guarantees a defined RESET output state down to VPOR = 700 mV. Below this voltage, the output is undefined. This enables reliable reset assertion during ultra-slow power ramp-up scenarios, such as those seen in energy-harvesting systems or supercapacitor backup circuits.

Can TLV803EA26RDBZR be used in a system with multiple voltage domains?

Yes - the open-drain topology of TLV803EA26RDBZR allows its RESET pin to be pulled up to any logic voltage (e.g., 1.8 V) independent of its VDD rail (e.g., 3.3 V). This enables safe, level-shifted reset coordination across heterogeneous voltage domains without additional translators or isolation components.

Is the 200 ms reset delay of TLV803EA26RDBZR affected by temperature or supply voltage?

No - the 200 ms reset delay (variant A) is internally generated and highly stable, varying by less than ±3% over –40°C to +125°C and 1.7 V to 6 V VDD, as confirmed in Figure 7-20 of the datasheet. This eliminates timing uncertainty in safety-critical boot sequences.