Texas Instruments TLV809EA26DBZR

Overview

TLV809EA26DBZR 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 2.64 V under-voltage detection threshold (±0.5% typical accuracy), 250 nA typical quiescent current, and a 200 ms reset time delay. It operates across –40°C to +125°C and asserts RESET when VDD drops below VIT–, holding it low for tD after VDD recovers above VIT+ - used in battery-powered metering and industrial control.

For engineers reviewing the TLV809EA26DBZR datasheet, TLV809EA26DBZR pinout, TLV809EA26DBZR application, or TLV809EA26DBZR equivalent, key selection criteria include guaranteed operation down to 0.7 V VPOR, SOT-23-3 (DBZ) package compatibility with legacy MAX809/TPS3809, glitch immunity (10 µs), and absence of external pull-up requirement due to push-pull output topology.

Technical Context

The TLV809EA26DBZR implements a precision bandgap-referenced comparator with integrated hysteresis (VHYS = 0.9–1.5% of VIT–) to prevent chatter during slow-rising supply transitions. Its internal timer enforces a fixed 200 ms (variant "A") reset timeout after VDD exceeds VIT+, independent of external components.

It uses a push-pull output stage capable of sourcing up to 4 mA and sinking 2 mA while maintaining VOL ≤ 300 mV at 500 µA sink (VDD = 1.7 V) and VOH ≥ 0.8×VDD at 2 mA source (VDD = 3.3 V), eliminating need for external pull-up resistors unlike open-drain variants.

Key Specifications

Pinout & Package

SOT-23-3 (DBZ) package, 2.90 mm × 1.30 mm body size, with pin 1 = GND (standard DBZ pinout per TI SLVSES2J Rev J, Figure 6-1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3809K26DBVR and MAX809TRD26+T, TLV809EA26DBZR uniquely delivers 250 nA IQ, 700 mV VPOR, and guaranteed 200 ms reset hold across full industrial temperature range - making it the only choice for ultra-low-power, long-duration, and high-reliability rail supervision.

Availability

TLV809EA26DBZR is available at Aetrix Electronics and suitable for electricity meters, factory automation controllers, and portable medical sensors requiring stable component supply across extended temperature and long product lifecycles.

Supply support for TLV809EA26DBZR 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, with over 50 years of innovation in power management and signal chain technologies.

The TLV809E series belongs to TI's precision low-power voltage supervisor family, engineered specifically for battery-critical and thermally demanding applications where accuracy, ultra-low IQ, and robust glitch immunity are non-negotiable.

FAQ

What is the exact reset threshold voltage for TLV809EA26DBZR?

The TLV809EA26DBZR has a factory-programmed falling threshold voltage (VIT–) of 2.64 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 (VIT+) equals VIT– plus hysteresis (0.9–1.5% of VIT–), ensuring noise immunity during supply recovery.

Does TLV809EA26DBZR require an external pull-up resistor on the RESET pin?

No, TLV809EA26DBZR does not require an external pull-up resistor because it features a push-pull active-low output stage. The RESET pin actively drives both high and low states - sourcing up to 4 mA and sinking up to 2 mA - eliminating dependency on external components and reducing layout complexity versus open-drain alternatives like TLV803E.

What is the power-on reset (VPOR) voltage specification for TLV809EA26DBZR?

The TLV809EA26DBZR has a VPOR of 700 mV, meaning its RESET output state is guaranteed only when VDD ≥ 700 mV. Below this voltage, the output is undefined. This low VPOR enables reliable reset assertion during ultra-low-voltage wake-up sequences in modern sub-1 V microcontrollers and SoCs.

Is TLV809EA26DBZR pin-compatible with legacy MAX809 devices?

Yes, TLV809EA26DBZR is pin-to-pin compatible with MAX809TRD26+T and APX809-26SA in the SOT-23-3 (DBZ) package, sharing identical pin 1 (GND), pin 2 (RESET), and pin 3 (VDD) assignments. However, TLV809EA26DBZR adds 200 ms fixed delay and 250 nA IQ - enhancements not present in the legacy MAX809 family.

What is the reset time delay for TLV809EA26DBZR and how is it implemented?

The TLV809EA26DBZR implements a fixed 200 ms reset time delay (variant "A"), enforced by an internal precision timer that starts when VDD rises above VIT+. This delay is process- and temperature-compensated (±10% over –40°C to +125°C), requires no external RC network, and ensures consistent reset hold time for MCU/FPGA initialization regardless of board-level parasitics.