Texas Instruments TLV803EB46DCKR

Overview

TLV803EB46DCKR 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 4.63 V threshold voltage (±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 industrial sensor nodes requiring guaranteed reset assertion down to 0.7 V VDD.

For engineers reviewing the TLV803EB46DCKR datasheet, TLV803EB46DCKR pinout, TLV803EB46DCKR application, or TLV803EB46DCKR equivalent, key selection criteria include its SC-70 package footprint, open-drain output requiring external pull-up, 40 µs fast release timing, ±0.5% threshold accuracy over temperature, and compatibility with systems demanding VPOR ≤ 700 mV and glitch immunity ≥10 µs.

Technical Context

The TLV803EB46DCKR implements a precision bandgap-referenced comparator with integrated hysteresis (VHYS = 0.9–1.5% of VIT–) to prevent chatter during slow-rising or noisy supply ramps. Its internal state machine enforces a fixed 40 µs reset timeout after VDD crosses above VIT+ (i.e., VIT– + VHYS), ensuring deterministic deassertion timing independent of external RC networks.

Unlike push-pull variants, the open-drain topology allows wired-OR reset bus configurations and supports mixed-voltage system interfacing via externally selected pull-up voltage. The device guarantees valid output logic states down to VPOR = 700 mV, enabling robust reset generation even during deep brownout conditions before full system power stabilization.

Key Specifications

Pinout & Package

TLV803EB46DCKR is housed in a 3-pin SC-70 (DCK) package measuring 2.00 mm × 1.25 mm, optimized for space-constrained PCB layouts. Pin 1 is RESET, Pin 2 is GND, and Pin 3 is VDD - matching industry-standard SC-70 pinout for drop-in replacement and layout reuse.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB46DCKR, TLV803EB46DBVR offers identical electrical behavior in a larger, more manufacturable package, while MAX803SUR46D3T trades speed and ultra-low power for legacy interoperability-making TLV803EB46DCKR optimal for space- and energy-constrained designs needing sub-100 µs reset fidelity.

Availability

TLV803EB46DCKR is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor nodes, FPGA configuration circuits, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLV803EB46DCKR 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 real-time control ICs.

The TLV803E series belongs to TI's precision voltage supervisor product line, engineered specifically for ultra-low-power, high-accuracy reset functionality in battery-operated and automotive-grade applications where reliability under voltage stress is critical.

FAQ

What is the exact threshold voltage and accuracy of TLV803EB46DCKR?

The TLV803EB46DCKR has a factory-programmed falling threshold voltage (VIT–) of 4.63 V with ±0.5% typical accuracy over –40°C to +125°C. This value is confirmed in Section 7.5 of the official datasheet and applies specifically to the "46" variant designation in the part number. The rising threshold (VIT+) equals VIT– plus hysteresis (0.9–1.5% of VIT–), ensuring noise-immune release behavior.

Does TLV803EB46DCKR require an external pull-up resistor?

Yes, TLV803EB46DCKR uses an open-drain active-low output and requires an external pull-up resistor on the RESET pin. Typical values range from 10 kΩ to 100 kΩ, connected to the desired logic-high voltage (e.g., 1.8 V, 3.3 V, or 5 V). This resistor sets the rise time and logic-high level, and its value affects total system current draw during reset assertion.

What is the reset delay time for TLV803EB46DCKR and how is it implemented?

The TLV803EB46DCKR has a fixed 40 µs reset delay (tD), specified as "variant B" in TI's naming convention. This delay is internally generated and does not rely on external capacitors or resistors. After VDD rises above VIT+, the RESET pin remains low for exactly 40 µs (typical) before transitioning high, ensuring consistent timing across temperature and voltage.

Can TLV803EB46DCKR operate reliably below 1 V supply voltage?

Yes, TLV803EB46DCKR guarantees defined output behavior down to VPOR = 700 mV, meaning the RESET pin state is controlled and predictable even when VDD is as low as 0.7 V. Below this voltage, the output becomes undefined. This capability supports safe initialization of low-VDD SoCs and brownout recovery in energy-harvesting systems.

Is TLV803EB46DCKR pin-compatible with older MAX803-series supervisors?

TLV803EB46DCKR is functionally compatible but not pin-to-pin compatible with MAX803/809/810 in SC-70 packages. While both are 3-pin devices, MAX803 variants use different pin assignments (e.g., MAX803L in SC-70 has Pin 1 = VDD, Pin 2 = GND, Pin 3 = RESET). TLV803EB46DCKR uses Pin 1 = RESET, Pin 2 = GND, Pin 3 = VDD - requiring PCB layout revision for direct replacement.