Texas Instruments TLV809EC26DBZR

Overview

TLV809EC26DBZR from Texas Instruments is a push-pull, active-low voltage supervisor IC designed for reliable power-on reset and brownout detection in low-power systems. It features a fixed 2.64 V under-voltage threshold (±0.5% typical accuracy), 10 ms reset time delay, 250 nA typical supply current, and operates across –40°C to +125°C - enabling use in battery-powered IoT sensors and industrial control modules.

For engineers reviewing the TLV809EC26DBZR datasheet, TLV809EC26DBZR pinout, TLV809EC26DBZR application, or TLV809EC26DBZR equivalent, key selection criteria include its guaranteed reset assertion down to 0.7 V VDD, glitch immunity against transients ≥10 µs, SOT-23-3 (DBZ) package with pin 1 = RESET, and compatibility with legacy MAX809/TPS3809 designs.

Technical Context

The TLV809EC26DBZR integrates a precision bandgap reference, comparator with hysteresis (1.2% typical VHYS), and a fixed 10 ms monostable timer to generate a clean, debounced reset pulse. Its push-pull output drives low without requiring an external pull-up resistor, simplifying PCB layout versus open-drain alternatives like TLV803E.

It monitors VDD continuously and asserts RESET when VDD falls below 2.64 V (VIT–); RESET remains asserted for exactly 10 ms after VDD rises above VIT+ (2.64 V + hysteresis). The device maintains defined logic states down to VPOR = 700 mV, ensuring deterministic behavior during ultra-low-voltage startup sequences.

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 - matches industry-standard pinout for MAX809/TPS3809 drop-in replacement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809TRD26+T and TPS3809K33DBVR, TLV809EC26DBZR delivers superior accuracy (±0.5% vs ±2%), lower quiescent current (250 nA vs 1.6 µA), and extended temperature support (–40°C to +125°C), making it optimal for high-reliability, battery-constrained, and thermally demanding applications.

Availability

TLV809EC26DBZR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, smart electricity meters, portable medical sensors, and factory automation edge nodes requiring stable component supply and long-term lifecycle assurance.

Supply support for TLV809EC26DBZR 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 high-reliability industrial and automotive ICs.

The TLV809EC26DBZR belongs to TI's TLV80xE family of ultra-low-power voltage supervisors, engineered specifically for battery-powered, space-constrained, and thermally harsh applications where precision, longevity, and robustness are critical.

FAQ

What is the exact reset threshold voltage of TLV809EC26DBZR?

The TLV809EC26DBZR has a factory-programmed falling threshold voltage (VIT–) of 2.64 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+) is VIT– plus hysteresis (typically 1.2% of VIT–), ensuring noise immunity during voltage recovery. TLV809EC26DBZR guarantees this specification across its full operating temperature and supply range.

Does TLV809EC26DBZR require an external pull-up resistor on the RESET pin?

No, TLV809EC26DBZR uses a push-pull output topology and does not require an external pull-up resistor on the RESET pin. Its active-low output actively drives low during reset assertion and actively drives high when deasserted, providing strong 2 mA sink and 4 mA source capability. This eliminates board space, BOM cost, and potential reliability issues associated with external resistors - a key advantage over open-drain alternatives like TLV803E. TLV809EC26DBZR is fully functional with only VDD, GND, and RESET connections.

What is the reset time delay of TLV809EC26DBZR and how is it implemented?

TLV809EC26DBZR has a fixed 10 ms reset time delay (tD), designated by the "C" suffix in its part number. This delay is implemented using an internal monostable timer and is independent of external components, temperature, or supply voltage. After VDD rises above VIT+, RESET remains asserted for exactly 10 ms before deasserting - ensuring sufficient hold time for microcontrollers and FPGAs to complete initialization. TLV809EC26DBZR maintains this timing spec across its full –40°C to +125°C operating range.

Can TLV809EC26DBZR operate reliably at very low supply voltages?

Yes, TLV809EC26DBZR guarantees defined reset behavior down to VPOR = 700 mV, meaning its output state is controlled and predictable even when VDD drops below typical logic thresholds. Below 700 mV, the output becomes undefined - but the 700 mV VPOR enables robust power-on-reset in ultra-low-voltage scenarios such as energy-harvesting systems or cold-cranking automotive applications. TLV809EC26DBZR continues to monitor and assert reset correctly throughout its 0.7 V to 6 V operating range.

Is TLV809EC26DBZR pin-compatible with legacy MAX809 devices?

Yes, TLV809EC26DBZR is pin-to-pin compatible with MAX809 variants in the SOT-23-3 (DBZ) package, sharing identical pin 1 (RESET), pin 2 (GND), pin 3 (VDD) assignments and footprint. It also matches the electrical interface - push-pull active-low output, same voltage ranges, and compatible timing. However, TLV809EC26DBZR improves upon MAX809 with tighter threshold accuracy (±0.5% vs ±2%), lower IQ (250 nA vs ~1.6 µA), and extended temperature range (–40°C to +125°C vs 0°C to +70°C). TLV809EC26DBZR serves as a direct, enhanced drop-in replacement.