Texas Instruments TLV809EC46DBZR

Overview

TLV809EC46DBZR 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), 10 ms reset time delay, 250 nA typical supply current, and operates across –40°C to +125°C - enabling reliable power-on reset in battery-powered IoT sensors and industrial controllers.

For engineers reviewing the TLV809EC46DBZR datasheet, TLV809EC46DBZR pinout, TLV809EC46DBZR application, or TLV809EC46DBZR equivalent, key selection considerations include its SOT-23-3 (DBZ) package with pin 1 = GND, guaranteed RESET assertion down to 0.7 V VDD, glitch immunity (10 µs), and compatibility with legacy MAX809/TPS3809 designs.

Technical Context

The TLV809EC46DBZR integrates a precision bandgap reference, comparator with hysteresis (1.2% typical), and monostable timer to generate a fixed 10 ms active-low reset pulse upon VDD falling below 4.63 V. Its push-pull output eliminates external pull-up requirements and supports sink currents up to 2 mA at 1.7 V.

It implements built-in glitch immunity (10 µs minimum pulse width rejection) and ensures defined logic state down to VPOR = 0.7 V, making it suitable for brownout detection in microcontroller-based systems where supply transients are common and ultra-low quiescent current is mandatory.

Key Specifications

Pinout & Package

SOT-23-3 (DBZ) package, 2.90 mm × 1.30 mm body size, pin 1 = GND (confirmed per Figure 6-1 and Device Nomenclature).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809SEUR+T, TLV809EC46DBZR delivers 6.4× lower max supply current and full automotive temperature support; versus TPS3809K33DBVR, it provides the exact 4.63 V threshold required for 5 V rail integrity without recalculating system margins.

Availability

TLV809EC46DBZR is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, and wireless sensor nodes requiring stable component supply with long-term lifecycle assurance.

Supply support for TLV809EC46DBZR 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 over 50 years of innovation in high-reliability ICs.

The TLV809E series belongs to TI's low-power voltage supervisor product line, engineered specifically for battery-critical and thermally demanding applications where nanoscale quiescent current and wide-temperature accuracy are non-negotiable.

FAQ

What is the exact reset threshold voltage of TLV809EC46DBZR?

The TLV809EC46DBZR has a factory-programmed falling threshold voltage (V_IT–) of 4.63 V with ±0.5% typical accuracy over –40°C to +125°C. This value is confirmed in the Device Naming Nomenclature ('46' = 4.63 V) and Electrical Characteristics table of the official datasheet SLVSES2J.

Does TLV809EC46DBZR require an external pull-up resistor on the RESET pin?

No. TLV809EC46DBZR uses a push-pull, active-low output topology, so the RESET pin drives both high and low internally. Unlike open-drain variants (e.g., TLV803E), TLV809EC46DBZR does not require an external pull-up resistor - simplifying layout and reducing BOM count.

What is the reset time delay for TLV809EC46DBZR?

The TLV809EC46DBZR has a fixed reset time delay (t_D) of 10 ms, corresponding to variant 'C' in the device naming convention. This delay is guaranteed over temperature and supply voltage and is used to hold the RESET signal asserted after VDD recovers above the rising threshold (V_IT+).

Can TLV809EC46DBZR operate reliably below 1 V supply voltage?

Yes. TLV809EC46DBZR guarantees a defined output state down to VPOR = 0.7 V, meaning the RESET pin remains predictably asserted or deasserted even during ultra-slow power ramps - critical for energy-harvesting and supercapacitor-backed systems.

Is TLV809EC46DBZR pin-compatible with legacy MAX809 devices?

Yes. TLV809EC46DBZR is explicitly pin-to-pin compatible with MAX803/809/810 and APX803/809/810 in the SOT-23-3 (DBZ) package. No PCB layout changes are needed when upgrading, provided the same 4.63 V threshold variant is selected.