Texas Instruments TLV809EA30DCKR

Overview

TLV809EA30DCKR from Texas Instruments is a push-pull, active-low voltage supervisor IC designed for reliable power-on reset and brownout detection in ultra-low-power systems. It features a fixed 3.0 V threshold (±0.5% typical accuracy), 200 ms reset delay, 250 nA typical supply current, and operates across –40°C to +125°C - enabling use in battery-powered IoT sensors and industrial edge controllers.

For engineers reviewing the TLV809EA30DCKR datasheet, TLV809EA30DCKR pinout, TLV809EA30DCKR application, or TLV809EA30DCKR equivalent, key selection criteria include its guaranteed RESET assertion down to 0.7 V VDD, SC-70 (DCK) 3-pin package footprint, glitch immunity against <10 µs transients, and compatibility with FPGA/ASIC power sequencing requirements.

Technical Context

The TLV809EA30DCKR implements a precision bandgap-referenced comparator with built-in hysteresis (1.2% typical VHYS) to prevent chatter during slow-rising or noisy supply rails. Its internal timer enforces a fixed 200 ms release delay after VDD exceeds the rising threshold (VIT+ = VIT– + VHYS), ensuring stable system initialization before processor release.

Unlike open-drain variants, the push-pull output drives both high and low without external pull-up components, delivering VOL ≤ 300 mV at 500 µA sink and VOH ≥ 0.8×VDD at 2 mA source - simplifying interface design with microcontrollers and logic inputs requiring clean, rail-to-rail reset signaling.

Key Specifications

Pinout & Package

TLV809EA30DCKR 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 - compatible with standard pick-and-place equipment and reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3809K33DBVR and MAX809TRD33+T, TLV809EA30DCKR delivers tighter threshold accuracy (±0.5% vs. ±2.5%), lower IQ (250 nA vs. >1 µA), and extended temperature support (–40°C to +125°C), making it optimal for high-reliability, battery-constrained, or thermally aggressive designs.

Availability

TLV809EA30DCKR is available at Aetrix Electronics and suitable for electricity meters, portable medical sensors, and industrial PLC I/O modules requiring stable component supply, long-lifecycle assurance, and consistent parametric performance across production batches.

Supply support for TLV809EA30DCKR 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 experience in high-reliability industrial and automotive ICs.

The TLV809E series belongs to TI's low-power voltage supervisor product line, engineered specifically for battery-operated, space-constrained, and thermally demanding applications where precision reset timing and nanowatt operation are mandatory.

FAQ

What is the exact reset threshold voltage of TLV809EA30DCKR?

The TLV809EA30DCKR has a factory-programmed falling threshold voltage (VIT–) of 3.0 V with ±0.5% typical accuracy over –40°C to +125°C. This value is laser-trimmed during production and does not require external calibration. The rising threshold (VIT+) equals VIT– plus hysteresis (1.2% typical), ensuring stable release without oscillation.

Does TLV809EA30DCKR require an external pull-up resistor on the RESET pin?

No. TLV809EA30DCKR uses a push-pull output stage, so the RESET pin actively drives both high and low states. Unlike open-drain supervisors (e.g., TLV803E), it does not require an external pull-up resistor - simplifying schematic design and reducing component count in systems like STM32-based controllers.

What is the minimum supply voltage at which TLV809EA30DCKR guarantees correct RESET assertion?

TLV809EA30DCKR guarantees defined RESET behavior down to 0.7 V VDD - meaning it will assert RESET reliably even during deep brownout conditions. Below 0.7 V, the output state is undefined. This VPOR specification is critical for fail-safe operation in energy-harvesting and backup-power systems.

Can TLV809EA30DCKR replace MAX809 in existing designs?

TLV809EA30DCKR is pin-compatible with MAX809 in SC-70 (DCK) and SOT-23-3 packages and offers identical active-low push-pull functionality. However, it improves upon MAX809 with ±0.5% threshold accuracy (vs. ±2.5%), 250 nA IQ (vs. ~1.2 µA), and extended temperature range (–40°C to +125°C vs. –40°C to +85°C).

How does the 200 ms reset delay in TLV809EA30DCKR affect system startup timing?

The 200 ms fixed reset delay (variant A) ensures the RESET signal remains asserted for at least 130 ms and up to 270 ms after VDD rises above VIT+, accommodating slow-rising supplies and LDO stabilization. This eliminates need for external RC timing networks and guarantees robust boot sequencing for processors like NXP i.MX RT1060 or Microchip SAM E70.