Texas Instruments TLV803EA26DCKR

Overview

TLV803EA26DCKR 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), 250 nA typical supply current, 40 µs fixed reset delay, 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 TLV803EA26DCKR datasheet, TLV803EA26DCKR pinout, TLV803EA26DCKR application, or TLV803EA26DCKR 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 designs in space-constrained applications.

Technical Context

The TLV803EA26DCKR implements a precision bandgap-referenced comparator with built-in hysteresis (1.2% typical) 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 2.64 V detection point is laser-trimmed at wafer test. The open-drain output supports flexible logic-level translation via external pull-up and enables wired-OR reset bus configurations in multi-rail systems.

Key Specifications

Pinout & Package

TLV803EA26DCKR is packaged in SC-70 (DCK), a 3-pin surface-mount package measuring 2.00 mm × 1.25 mm with standard pinout: Pin 1 = GND, Pin 2 = RESET (open-drain output), Pin 3 = VDD.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX803SUR26+T and TPS3809K26DBVR, TLV803EA26DCKR uniquely delivers 250 nA typical I_DD with guaranteed 0.7 V operation and SC-70 packaging - making it optimal for next-generation wearables and edge AI sensors where size, leakage, and deep-brownout resilience are co-constrained.

Availability

TLV803EA26DCKR is available at Aetrix Electronics and suitable for portable medical sensors, smart electricity meters, industrial PLC I/O modules, and low-power FPGA configuration circuits requiring stable component supply across extended temperature and long-lifecycle programs.

Supply support for TLV803EA26DCKR 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 90 years of innovation in power management, signal chain, and control ICs.

The TLV803E series belongs to TI's precision voltage supervisor product line, engineered specifically for ultra-low-power, high-accuracy reset generation in battery-operated and thermally demanding applications - emphasizing reliability over 15+ year field deployments.

FAQ

What is the exact reset threshold voltage of TLV803EA26DCKR?

The TLV803EA26DCKR has a factory-programmed falling threshold voltage (V_IT–) of 2.64 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, Section 7.5). No external components affect this threshold.

Does TLV803EA26DCKR require an external pull-up resistor?

Yes, TLV803EA26DCKR features an open-drain active-low RESET output and requires an external pull-up resistor to define the high-state voltage. A 10 kΩ resistor to the target logic rail (e.g., 3.3 V or 1.8 V) is typical. Unlike push-pull variants (e.g., TLV809E), TLV803EA26DCKR cannot drive high actively.

What is the minimum supply voltage at which TLV803EA26DCKR guarantees reset assertion?

TLV803EA26DCKR guarantees valid reset assertion down to 0.7 V VDD - the lowest among its family. Below this voltage (VPOR = 700 mV), the RESET output state is undefined. This enables reliable operation during deep brownout events where other supervisors may release reset prematurely.

Is TLV803EA26DCKR pin-compatible with older MAX803 variants?

TLV803EA26DCKR is pin-to-pin compatible with MAX803 in SC-70 (DCK) and SOT-23 (DBZ) packages per TI's device comparison documentation. However, note that TLV803EA26DCKR uses SC-70, while many MAX803 variants use SOT-23 - mechanical fit must be verified against footprint dimensions (2.00 mm × 1.25 mm vs. 2.90 mm × 1.30 mm).

What is the reset delay time for TLV803EA26DCKR?

The TLV803EA26DCKR has a fixed reset delay (t_D) of 40 µs, as indicated by the "B" suffix in its part number per TI's naming convention. This delay is the time RESET remains asserted after VDD rises above the rising threshold (V_IT+ = V_IT– + hysteresis), and is production-tested and temperature-stable.