Texas Instruments TLV809EA46DBZR

Overview

TLV809EA46DBZR 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), 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 IoT sensors and industrial controllers requiring precise brownout protection.

For engineers reviewing the TLV809EA46DBZR datasheet, TLV809EA46DBZR pinout, TLV809EA46DBZR application, or TLV809EA46DBZR equivalent, key selection criteria include its SOT-23-3 (DBZ) package with pin 1 = RESET, push-pull output eliminating external pull-up needs, guaranteed operation at 0.7 V VDD, and ±0.5% threshold accuracy over full temperature range.

Technical Context

The TLV809EA46DBZR implements a precision bandgap-referenced comparator with integrated 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 VIT+ (4.63 V + VHYS), ensuring sufficient system stabilization before release.

It includes built-in glitch immunity (10 µs typical) rejecting transients on VDD below specified overdrive thresholds, and guarantees defined logic state down to VPOR = 0.7 V - critical for ultra-low-voltage microcontroller startup sequencing in energy-harvesting applications.

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 footprint for drop-in replacement of MAX809/MCP102.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV809EA46DBZR, MAX809TRD3+T offers lower cost but sacrifices extended temperature support and ultra-low IQ, while MCP102T-460I/TT trades threshold accuracy and current efficiency for broader distributor availability - making TLV809EA46DBZR optimal for high-reliability, long-life, wide-temp applications.

Availability

TLV809EA46DBZR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart electricity meters, and portable medical diagnostics requiring stable component supply across extended temperature and ultra-low-power constraints.

Supply support for TLV809EA46DBZR 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, serving industrial, automotive, and communications markets.

The TLV809E series belongs to TI's low-power voltage supervisor product line, engineered for high-accuracy, ultra-low-IQ power monitoring in battery-constrained and thermally demanding applications.

FAQ

What is the exact reset threshold voltage of TLV809EA46DBZR?

The TLV809EA46DBZR has a factory-programmed falling threshold voltage (VIT–) of 4.63 V with ±0.5% typical accuracy over –40°C to +125°C. This value is laser-trimmed during production and does not require external components to set - it is fixed and guaranteed per the device nomenclature "46" suffix.

Does TLV809EA46DBZR require an external pull-up resistor on the RESET pin?

No. TLV809EA46DBZR uses a push-pull, active-low output topology, so the RESET pin actively drives low during fault conditions and high during normal operation. Unlike open-drain variants (e.g., TLV803E), TLV809EA46DBZR eliminates the need for an external pull-up resistor, simplifying layout and reducing component count.

What is the minimum supply voltage at which TLV809EA46DBZR guarantees correct reset behavior?

TLV809EA46DBZR guarantees a defined output state down to VPOR = 0.7 V. Below this voltage, the RESET output becomes undefined. This feature ensures reliable reset assertion during ultra-slow power ramps common in energy-harvesting and supercapacitor backup systems.

How does the 200 ms reset delay in TLV809EA46DBZR benefit system reliability?

The 200 ms fixed reset delay (variant A) ensures the host processor remains held in reset long enough for all power rails to stabilize, LDOs to settle, clocks to lock, and nonvolatile memory writes to complete - preventing boot failures, register corruption, or metastability in FPGAs and microcontrollers.

Is TLV809EA46DBZR pin-compatible with legacy MAX809 devices?

Yes. TLV809EA46DBZR uses the standard SOT-23-3 (DBZ) package with identical pinout (pin 1 = RESET, pin 2 = GND, pin 3 = VDD) and matches MAX809's 4.63 V threshold and 200 ms delay. It is a direct functional and mechanical replacement offering improved IQ, accuracy, and temperature range.