Texas Instruments TLV803EA24DCKR

Overview

TLV803EA24DCKR 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 fixed 2.4 V threshold voltage (±0.5% typical accuracy), 250 nA typical supply current, 50 ms fixed reset delay, and operates across –40°C to +125°C - enabling use in battery-powered IoT sensors and industrial edge controllers.

For engineers reviewing the TLV803EA24DCKR datasheet, TLV803EA24DCKR pinout, TLV803EA24DCKR application, or TLV803EA24DCKR equivalent, key selection criteria include its SC-70 (DCK) 3-pin package, guaranteed RESET assertion down to 0.7 V VDD, integrated glitch immunity (10 µs), and compatibility with FPGA/ASIC power sequencing requirements.

Technical Context

The TLV803EA24DCKR implements a precision bandgap-referenced comparator with built-in hysteresis (1.2% typical) to prevent oscillatory reset behavior during slow-rising or noisy supply rails. Its internal timer ensures a deterministic 50 ms reset pulse width after VDD recovers above the rising threshold (VIT+ = VIT– + VHYS).

As an open-drain device, it requires an external pull-up resistor on the RESET pin - enabling wired-OR configurations and flexible logic-level translation. The IC maintains defined output state down to VPOR = 0.7 V, supporting robust startup in low-voltage microcontroller systems.

Key Specifications

Pinout & Package

TLV803EA24DCKR is housed in a 3-pin SC-70 (DCK) package (2.00 mm × 1.25 mm body), optimized for space-constrained PCB layouts. Pin 1 = RESET, Pin 2 = GND, Pin 3 = VDD - standard pinout compatible with SOT-23 footprint adapters.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EA24DCKR, TLV803EA24DBZR offers identical supervision functionality in a larger, more thermally robust package but demands layout revision, while TPS3809K24DBVR eliminates external components at the cost of higher quiescent current and inflexible timing - making TLV803EA24DCKR optimal for size- and power-critical designs.

Availability

TLV803EA24DCKR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart metering modules, and portable medical diagnostics requiring stable component supply across extended product lifecycles.

Supply support for TLV803EA24DCKR 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 for industrial, automotive, and personal electronics markets.

The TLV803E series belongs to TI's precision low-power supervisor product line, engineered specifically for battery-operated and thermally demanding applications where reliability, accuracy, and nanoamp quiescent current are critical.

FAQ

What is the exact reset threshold voltage of TLV803EA24DCKR?

The TLV803EA24DCKR has a factory-programmed falling threshold voltage (VIT–) of 2.4 V with ±0.5% typical accuracy across –40°C to +125°C. This value is laser-trimmed during production and specified in the Electrical Characteristics table of the official datasheet (SLVSES2J). The rising threshold (VIT+) is VIT– plus hysteresis (1.2% typical), ensuring noise immunity during recovery.

Does TLV803EA24DCKR require an external pull-up resistor on the RESET pin?

Yes, TLV803EA24DCKR uses an open-drain active-low output and requires an external pull-up resistor on the RESET pin to establish a valid high logic level. Typical values range from 10 kΩ to 100 kΩ pulled to the target logic rail (e.g., 3.3 V). This configuration enables wired-OR reset buses and voltage-level translation - a key design feature confirmed in the Functional Block Diagram and Pin Functions table of the TLV803E datasheet.

What is the reset delay time for TLV803EA24DCKR, and is it adjustable?

The TLV803EA24DCKR has a fixed 50 ms reset delay (designated "variant D" per TI's naming nomenclature), which is factory-set and not user-adjustable. This delay begins after VDD rises above VIT+ and ensures the output remains asserted for exactly 50 ms (with ±20% variation over temperature), providing reliable hold time for microcontroller initialization - as verified in Section 7.6 Timing Requirements of SLVSES2J.

Can TLV803EA24DCKR operate reliably below 1.0 V supply voltage?

Yes, TLV803EA24DCKR guarantees defined RESET output behavior down to VPOR = 0.7 V, meaning it will assert RESET predictably even when VDD drops to 0.7 V. Below this voltage, the output becomes undefined. This capability is explicitly tested and documented in the Electrical Characteristics table (VPOR parameter) and supports robust startup in deeply discharged battery scenarios.

Is TLV803EA24DCKR pin-compatible with legacy MAX803-series supervisors?

Yes, TLV803EA24DCKR is pin-to-pin compatible with MAX803 (SC-70-3 package) for the same threshold and delay variants, as stated in the Features section of the datasheet. However, note that MAX803 specifies 1.6 µA max IQ versus TLV803EA24DCKR's 1 µA max - confirming functional drop-in replacement with superior power efficiency and extended temperature range (–40°C to +125°C vs MAX803's –40°C to +85°C).