Texas Instruments TLV809EA17DBZR

Overview

TLV809EA17DBZR 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 1.7 V under-voltage detection threshold (±0.5% typical accuracy), 200 ms reset time delay, 250 nA typical supply current, and operates across –40°C to +125°C. It ensures reliable power-on reset down to 0.7 V VDD and is used in battery-powered metering and industrial control circuits.

For engineers reviewing the TLV809EA17DBZR datasheet, TLV809EA17DBZR pinout, TLV809EA17DBZR application, or TLV809EA17DBZR equivalent, key selection considerations include its SOT-23-3 (DBZ) package with pin 1 = RESET, push-pull active-low output topology, guaranteed operation at 0.7 V VDD, ±0.5% threshold accuracy, and immunity to sub-10 µs VDD transients.

Technical Context

The TLV809EA17DBZR implements a precision bandgap-referenced comparator with built-in hysteresis (1.2% typical) to prevent chatter during threshold crossings. Its internal timer enforces a fixed 200 ms reset assertion period after VDD recovers above the rising threshold (VIT+ = VIT– + VHYS).

It integrates glitch immunity logic that ignores VDD excursions shorter than 10 µs (typical), ensuring robustness against noise-induced false resets. The push-pull output drives RESET low without requiring an external pull-up resistor, simplifying PCB layout versus open-drain alternatives.

Key Specifications

Pinout & Package

SOT-23-3 (DBZ) package, 2.90 mm × 1.30 mm body size, with pin 1 = RESET, pin 2 = GND, pin 3 = VDD (R-pinout configuration per TI device nomenclature).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV809EA17DBZR, TPS3809K33DBVR offers lower threshold but sacrifices accuracy and quiescent current efficiency, while MAX809TRD3T trades precision and ultra-low power for broader legacy compatibility-neither provides identical 1.7 V/200 ms/250 nA performance.

Availability

TLV809EA17DBZR is available at Aetrix Electronics and suitable for smart metering, factory automation PLCs, and portable medical sensors requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance.

Supply support for TLV809EA17DBZR 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 battery-critical and thermally demanding applications where accuracy, ultra-low IQ, and wide temperature operation are mandatory.

FAQ

What is the exact reset threshold voltage of TLV809EA17DBZR?

The TLV809EA17DBZR has a factory-programmed falling threshold voltage (V_IT–) of 1.7 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.

Does TLV809EA17DBZR require an external pull-up resistor on the RESET pin?

No, TLV809EA17DBZR uses a push-pull output stage and does not require an external pull-up resistor. Its active-low RESET pin actively drives low during fault conditions and high during normal operation, simplifying design versus open-drain supervisors like TLV803E. This eliminates BOM cost and layout area for the pull-up.

What is the minimum supply voltage at which TLV809EA17DBZR guarantees correct reset behavior?

TLV809EA17DBZR guarantees defined reset output behavior down to 700 mV (V_POR). Below this voltage, the output state is undefined. This enables reliable power-on reset assertion even during deep brown-out events, a key requirement for energy-harvesting and ultra-low-power systems.

How does the 200 ms reset delay in TLV809EA17DBZR improve system reliability?

The fixed 200 ms reset delay (variant A) ensures the monitored VDD rail remains stable for sufficient time before releasing the microcontroller from reset. This prevents premature execution due to ripple or slow-rising supplies, especially critical after cold start or capacitor-based backup power recovery in TLV809EA17DBZR applications.

Is TLV809EA17DBZR pin-compatible with legacy MAX809 devices?

Yes, TLV809EA17DBZR is pin-to-pin compatible with MAX809 and APX809 in the SOT-23-3 (DBZ) package per TI documentation. However, it improves upon them with ±0.5% threshold accuracy (vs. ±2.5%), 250 nA I_DD (vs. ~10 µA), and extended –40°C to +125°C operation-making TLV809EA17DBZR a direct drop-in upgrade.