Texas Instruments TLV803EB22DCKR

Overview

TLV803EB22DCKR 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 2.2 V factory-programmed threshold (±0.5% typical accuracy), 40 µs fixed reset delay, 250 nA typical supply current at 3.3 V, and operates across –40°C to +125°C. It is used in battery-powered microcontrollers, FPGA configuration circuits, and portable instrumentation to ensure deterministic system initialization.

For engineers reviewing the TLV803EB22DCKR datasheet, TLV803EB22DCKR pinout, TLV803EB22DCKR application, or TLV803EB22DCKR equivalent, key selection criteria include its guaranteed reset assertion down to 0.7 V VDD, SC-70 (DCK) 3-pin package footprint, open-drain output requiring external pull-up, and compatibility with legacy MAX803/TPS3809-based designs where low IQ and extended temperature range are critical.

Technical Context

The TLV803EB22DCKR implements a precision bandgap-referenced comparator with built-in hysteresis (1.2% typical VHYS) to prevent chatter during slow-rising or noisy supply rails. Its internal glitch immunity filter rejects transients ≤10 µs at 5% overdrive, ensuring robust operation in electrically harsh environments like factory automation nodes.

As a member of the TLV80xE family, it uses a fixed-threshold architecture with no external resistor network required - the 2.2 V trip point is laser-trimmed during wafer test. The open-drain output supports flexible logic-level translation via external pull-up to any voltage ≤6 V, enabling use with mixed-voltage SoCs and FPGAs.

Key Specifications

Pinout & Package

TLV803EB22DCKR is housed in a 3-pin SC-70 (DCK) package (2.00 mm × 1.25 mm body), pin-compatible with SOT-23-3 but with reduced footprint. Pin 1 = RESET, Pin 2 = GND, Pin 3 = VDD.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB22DCKR, TPS3809K33DBVR offers simpler interfacing but lacks sub-µA IQ and extended temperature support, while MAX803SUR22+T matches the threshold and topology but trades off 40 µs speed, 250 nA efficiency, and 125°C operation for legacy compatibility and lower unit cost.

Availability

TLV803EB22DCKR is available at Aetrix Electronics and suitable for electricity meters, portable medical devices, FPGA configuration circuits, and industrial PLC I/O modules requiring stable component supply across extended temperature and ultra-low-power constraints.

Supply support for TLV803EB22DCKR 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 delivering analog and embedded processing solutions, with over 50 years of innovation in power management, signal chain, and timing products.

The TLV803E series belongs to TI's precision voltage supervisor product line, engineered specifically for ultra-low-power, high-accuracy reset generation in battery-critical and thermally demanding applications such as smart meters and industrial edge nodes.

FAQ

What is the exact reset threshold voltage of TLV803EB22DCKR?

The TLV803EB22DCKR has a factory-programmed falling threshold voltage (V_IT–) of 2.2 V with ±0.5% typical accuracy across –40°C to +125°C. This value is laser-trimmed and specified in the Electrical Characteristics table of the official datasheet (SLVSES2J). No external components affect this threshold.

Does TLV803EB22DCKR require an external pull-up resistor on the RESET pin?

Yes, TLV803EB22DCKR uses an open-drain active-low output and requires an external pull-up resistor to a valid logic-high voltage (≤6 V). A 10 kΩ resistor to 3.3 V is recommended per the datasheet's typical application circuit. Without it, the RESET signal remains floating and non-functional.

What is the minimum supply voltage at which TLV803EB22DCKR guarantees a valid reset output?

TLV803EB22DCKR guarantees a defined reset output state down to V_POR = 700 mV. Below this voltage, the output is undefined. This enables reliable reset assertion during ultra-slow power ramps, such as those seen in energy-harvesting systems or deeply discharged batteries.

Can TLV803EB22DCKR replace MAX803 in existing designs?

TLV803EB22DCKR is pin-to-pin compatible with MAX803 variants in SC-70 (DCK) and SOT-23-3 packages and shares the same open-drain active-low topology. However, it offers tighter threshold accuracy (±0.5% vs ±2.5%), lower IQ (250 nA vs ~1.2 µA), and extended temperature range (–40°C to +125°C vs –40°C to +85°C), making it a functional upgrade.

What is the reset delay time for TLV803EB22DCKR and how is it implemented?

TLV803EB22DCKR provides a fixed 40 µs reset delay (t_D) after VDD rises above the rising threshold (V_IT+). This delay is internally generated using a precision RC timer and is stable across temperature and voltage - no external capacitor is needed. Typical variation is ±20% over full operating conditions.