Texas Instruments TLV809EA46DCKR

Overview

TLV809EA46DCKR from Texas Instruments is a push-pull, active-low voltage supervisor IC designed for supply rail monitoring in low-power embedded systems. It features a fixed 4.63 V under-voltage detection threshold (±0.5% typical accuracy), 50 ms reset time delay, and ultra-low 250 nA typical quiescent current - enabling reliable power-on reset and brownout protection in battery-powered IoT sensors and portable medical devices.

For engineers reviewing the TLV809EA46DCKR datasheet, TLV809EA46DCKR pinout, TLV809EA46DCKR application, or TLV809EA46DCKR equivalent, key selection criteria include its SC-70 (DCK) 3-pin package, guaranteed RESET assertion down to 0.7 V VDD, glitch immunity (10 µs), and compatibility with 1.7–6 V supply rails in space-constrained industrial control modules.

Technical Context

The TLV809EA46DCKR implements a precision bandgap-referenced comparator with built-in hysteresis (1.2% typical) to prevent false resets during supply ripple. Its internal timer ensures a fixed 50 ms reset pulse width after VDD recovers above the rising threshold (VIT+ = VIT− + VHYS), independent of external components.

Unlike open-drain variants, the push-pull output drives both high and low without requiring an external pull-up resistor - simplifying BOM and reducing board area. The device operates across −40°C to +125°C and maintains defined logic states down to VPOR = 0.7 V, supporting robust startup in cold-temperature edge nodes.

Key Specifications

Pinout & Package

TLV809EA46DCKR 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 TLV809EA46DCKR, TLV809MA46DBVR offers identical electrical behavior in a larger, more thermally robust package, while TPS3809K46DBVR trades timing precision and ultra-low power for legacy compatibility - making TLV809EA46DCKR optimal for miniaturized, battery-sensitive designs demanding exact 50 ms reset control.

Availability

TLV809EA46DCKR is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, and smart meter communication modules requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for TLV809EA46DCKR 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, embedded processing, and power management technologies, with decades of expertise in precision voltage supervision and low-power system design.

The TLV809E series belongs to TI's enhanced voltage supervisor product line, engineered specifically for ultra-low-power, small-form-factor applications where reliability, accuracy, and extended temperature operation are critical - such as battery-powered IoT endpoints and industrial edge controllers.

FAQ

What is the exact reset threshold voltage of TLV809EA46DCKR?

The TLV809EA46DCKR has a factory-programmed falling threshold voltage (V_IT−) of 4.63 V with ±0.5% typical accuracy across −40°C to +125°C. This value is laser-trimmed during production and does not require external calibration. The rising threshold (V_IT+) is V_IT− plus hysteresis (1.2% typical), ensuring noise immunity during recovery. TLV809EA46DCKR delivers this specification without external components.

Does TLV809EA46DCKR require an external pull-up resistor on the RESET pin?

No, TLV809EA46DCKR uses a push-pull output topology that actively drives both high and low states - eliminating the need for an external pull-up resistor. This reduces BOM count, saves PCB area, and avoids potential failure modes associated with resistor aging or solder joint fatigue. TLV809EA46DCKR can source up to 4 mA and sink up to 2 mA on the RESET pin under specified conditions.

What is the minimum supply voltage at which TLV809EA46DCKR guarantees correct reset behavior?

TLV809EA46DCKR guarantees a defined output state down to a power-on-reset voltage (VPOR) of 700 mV. Below this level, the RESET output becomes undefined. This feature ensures deterministic reset assertion during ultra-slow power ramp-up, such as in energy-harvesting systems or deeply discharged batteries. TLV809EA46DCKR maintains this VPOR specification across its full −40°C to +125°C operating range.

How does the 50 ms reset delay of TLV809EA46DCKR improve system reliability?

The fixed 50 ms reset delay in TLV809EA46DCKR ensures the monitored supply remains stable for sufficient time before releasing the microcontroller from reset - preventing premature execution during LDO settling or capacitor charging. This eliminates race conditions common in systems with slow-ramping rails. TLV809EA46DCKR achieves this timing internally without external capacitors, guaranteeing consistency across temperature and voltage.

Is TLV809EA46DCKR pin-compatible with legacy MAX809 or APX809 devices?

Yes, TLV809EA46DCKR is pin-to-pin compatible with MAX809 and APX809 in SC-70 (DCK) packages, sharing identical pinout (Pin 1 = RESET, Pin 2 = GND, Pin 3 = VDD) and functional behavior. However, TLV809EA46DCKR improves upon them with ±0.5% threshold accuracy (vs. ±1.5–2%), 250 nA I_Q (vs. ~1 µA), and guaranteed operation down to 0.7 V - making TLV809EA46DCKR a direct, higher-performance drop-in replacement.