Texas Instruments TLV809EA22DBZR

Overview

TLV809EA22DBZR 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 2.2 V ±0.5% threshold voltage, 250 nA typical quiescent current, 40 µs reset delay, and operates across –40°C to +125°C - enabling reliable power-on reset in battery-powered IoT sensors and portable medical devices.

For engineers reviewing the TLV809EA22DBZR datasheet, TLV809EA22DBZR pinout, TLV809EA22DBZR application, or TLV809EA22DBZR equivalent, key selection criteria include its guaranteed reset assertion down to 0.7 V VDD, SOT-23-3 (DBZ) package with pin 1 = RESET, glitch immunity of 10 µs, and compatibility with manual reset (MR) input for system-level fault recovery.

Technical Context

The TLV809EA22DBZR integrates a precision bandgap reference, comparator with hysteresis (±0.9–1.5%), and fixed 40 µs timing circuit to generate a clean, glitch-immune active-low reset signal. Its push-pull output eliminates external pull-up requirements and supports sink currents up to 2 mA at 1.7 V VDD.

It monitors VDD continuously and asserts RESET when voltage falls below 2.2 V (VIT–), holding it low for exactly 40 µs after VDD rises above VIT+ (2.2 V + VHYS). The device maintains defined logic states down to VPOR = 700 mV and includes MR input for synchronous system reset initiation.

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 - compatible with standard pick-and-place equipment and reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV809MA22DBZR and MAX809TR22D3T, TLV809EA22DBZR delivers superior timing precision (40 µs vs. 200 ms/140 ms), lower power (250 nA vs. ~1 µA), and push-pull simplicity - making it the preferred choice for modern low-power microcontroller supervision.

Availability

TLV809EA22DBZR is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, smart meter RTC backup, and automotive body control modules requiring stable component supply and long-term lifecycle support.

Supply support for TLV809EA22DBZR 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 supervisory circuits.

The TLV809E series belongs to TI's low-power voltage supervisor product line, engineered specifically for battery-operated and thermally constrained applications demanding nanoscale IQ and wide-temperature robustness.

FAQ

What is the exact reset threshold voltage of TLV809EA22DBZR?

The TLV809EA22DBZR has a factory-programmed falling threshold voltage (VIT–) of 2.2 V with ±0.5% typical accuracy across –40°C to +125°C. This value is laser-trimmed during production and specified in Section 7.5 of the datasheet under Electrical Characteristics.

Does TLV809EA22DBZR require an external pull-up resistor on the RESET pin?

No. TLV809EA22DBZR uses a push-pull, active-low output topology, so the RESET pin actively drives low and high without needing an external pull-up resistor - unlike open-drain variants such as TLV803E.

What is the minimum supply voltage at which TLV809EA22DBZR guarantees correct reset behavior?

TLV809EA22DBZR guarantees defined output logic states down to VPOR = 700 mV. Below this voltage, the RESET output becomes undefined - a critical specification for ultra-low-voltage brownout handling in energy-harvesting systems.

How does the 40 µs reset delay of TLV809EA22DBZR impact microcontroller startup timing?

The 40 µs fixed delay ensures the microcontroller's internal clocks and PLLs stabilize before release from reset. This eliminates need for external RC timing networks and aligns precisely with typical ARM Cortex-M0+ and RISC-V core initialization windows.

Is TLV809EA22DBZR pin-compatible with legacy MAX809 devices?

Yes - TLV809EA22DBZR is pin-to-pin compatible with MAX809TR22D3T in SOT-23-3 package, but differs in output topology (push-pull vs. open-drain) and timing (40 µs vs. 140 ms), requiring schematic review before substitution.