Texas Instruments TLV809EA26DCKR

Overview

TLV809EA26DCKR from Texas Instruments is a push-pull, active-low voltage supervisor IC designed for reliable power-on reset and brownout detection in low-power embedded systems. It features a fixed 2.64 V under-voltage threshold (±0.5% typical accuracy), 250 nA typical supply current, 50 ms fixed reset delay, and operates across –40°C to +125°C. It ensures deterministic reset assertion down to 0.7 V VDD and is used in battery-powered IoT nodes and industrial sensor modules.

For engineers reviewing the TLV809EA26DCKR datasheet, TLV809EA26DCKR pinout, TLV809EA26DCKR application, or TLV809EA26DCKR equivalent, key selection criteria include its SC-70 package footprint, guaranteed reset behavior below 1 V, glitch immunity (10 µs), ±0.5% threshold accuracy over temperature, and compatibility with manual reset (MR) inputs in space-constrained designs.

Technical Context

The TLV809EA26DCKR 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 timer enforces a fixed 50 ms reset timeout after VDD crosses the rising threshold (VIT+ = VIT– + VHYS), ensuring sufficient hold time for microcontroller initialization.

Unlike open-drain variants, this device uses a push-pull output stage capable of sourcing up to 4 mA and sinking 2 mA, eliminating external pull-up resistors. It integrates glitch immunity logic that ignores transients shorter than 10 µs at 5% overdrive, making it robust against switching noise on shared power rails.

Key Specifications

Pinout & Package

TLV809EA26DCKR is housed in a 3-pin SC-70 (DCK) package measuring 2.00 mm × 1.25 mm, optimized for high-density PCB layouts. Pin 1 = RESET, Pin 2 = GND, Pin 3 = VDD - standard pinout compatible with automated placement and reflow.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV809EA26DCKR, TPS3809K33DBVR trades ultra-low IQ for longer reset hold time, while MAX809TRD3T offers legacy pin compatibility at the cost of higher quiescent current and less accurate threshold - neither matches TLV809EA26DCKR's combination of 2.64 V precision, 50 ms timing, and SC-70 footprint.

Availability

TLV809EA26DCKR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart metering modules, factory automation I/O expanders, and portable medical monitors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLV809EA26DCKR 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 and embedded processing technologies, with decades of expertise in precision power management and signal chain solutions.

The TLV809E series belongs to TI's low-power voltage supervisor product line, engineered specifically for energy-constrained applications demanding high accuracy, wide temperature operation, and minimal board space - such as battery-powered IoT endpoints and automotive body electronics.

FAQ

What is the exact reset threshold voltage of TLV809EA26DCKR?

The TLV809EA26DCKR 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 verified per TI's SLVSES2J datasheet Section 7.5. The rising threshold (VIT+) is VIT– plus hysteresis (1.2% typical), ensuring stable release without oscillation.

Does TLV809EA26DCKR require an external pull-up resistor on the RESET pin?

No, TLV809EA26DCKR does not require an external pull-up resistor because it features a push-pull active-low output stage. The RESET pin actively drives low during fault conditions and high during normal operation, unlike open-drain variants such as TLV803E. This simplifies schematic design and reduces component count in space-sensitive layouts.

What is the minimum supply voltage at which TLV809EA26DCKR guarantees a valid reset output state?

TLV809EA26DCKR guarantees a defined reset output state down to 0.7 V VDD (VPOR = 700 mV), as specified in Section 7.5 of the datasheet. Below this voltage, the output becomes undefined - a critical feature enabling reliable startup sequencing in ultra-low-voltage battery applications where other supervisors lose control.

How does the 50 ms reset delay of TLV809EA26DCKR impact microcontroller boot timing?

The 50 ms reset delay (tD) of TLV809EA26DCKR ensures the RESET signal remains asserted for ≥33 ms and ≤67 ms after VDD rises above VIT+, providing ample hold time for most ARM Cortex-M and RISC-V MCUs to complete internal PLL lock, flash initialization, and peripheral configuration before releasing reset - eliminating need for software-based delays.

Is TLV809EA26DCKR pin-compatible with legacy MAX809 devices?

No, TLV809EA26DCKR is not pin-compatible with MAX809 devices. While functionally similar, TLV809EA26DCKR uses an SC-70 (DCK) 3-pin package (Pin 1 = RESET, Pin 2 = GND, Pin 3 = VDD), whereas MAX809 variants use SOT-23-3 with differing pinouts (e.g., MAX809TRD3T: Pin 1 = VDD, Pin 2 = GND, Pin 3 = RESET). Layout redesign is required for replacement.