Texas Instruments TLV803EA22DBZR

Overview

TLV803EA22DBZR from Texas Instruments is an open-drain, active-low voltage supervisor IC designed for reliable power-on reset and brownout detection in ultra-low-power systems. It features a 2.2 V factory-programmed threshold (±0.5% typical accuracy), 250 nA typical supply current, 40 µs fixed reset delay, and guaranteed operation down to 0.7 V VDD - enabling robust reset assertion in battery-backed microcontrollers and FPGA configuration circuits.

For engineers reviewing the TLV803EA22DBZR datasheet, TLV803EA22DBZR pinout, TLV803EA22DBZR application, or TLV803EA22DBZR equivalent, this page delivers verified electrical specifications, SOT-23-3 (DBZ) package mapping with pin-1-as-GND configuration, real-world timing behavior under transient conditions, and validated alternative options for supply-voltage monitoring in portable and industrial embedded designs.

Technical Context

The TLV803EA22DBZR implements a precision bandgap-referenced comparator with integrated hysteresis (1.2% typical VHYS) to prevent false resets during supply ripple. Its open-drain output requires an external pull-up resistor and remains asserted low for exactly 40 µs after VDD rises above the rising threshold (VIT+ = VIT– + VHYS).

Glitch immunity is built-in: transients on VDD shorter than 10 µs (typical) are ignored regardless of amplitude, and the device maintains defined output state down to VPOR = 0.7 V - critical for deterministic startup in energy-harvesting and coin-cell-powered applications.

Key Specifications

Pinout & Package

SOT-23-3 (DBZ) package, 2.90 mm × 1.30 mm body size, with pin 1 = GND (confirmed per Figure 6-1 and Table 6-1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EA22DBZR, TLV803EB22DBZR trades timing precision for extended hold duration, while MAX803SUR22+T offers legacy compatibility at the expense of quiescent current and delay flexibility - making TLV803EA22DBZR optimal for modern battery-critical designs requiring 40 µs response.

Availability

TLV803EA22DBZR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, smart meter MCU supervision, and portable medical sensor nodes requiring stable component supply with guaranteed long-term lifecycle support.

Supply support for TLV803EA22DBZR 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 ICs.

The TLV803E series was engineered specifically for ultra-low-power, small-footprint voltage monitoring in battery-operated and thermally demanding applications - delivering enhanced accuracy and extended temperature range over legacy supervisors.

FAQ

What is the exact reset threshold voltage of TLV803EA22DBZR?

The TLV803EA22DBZR has a factory-programmed falling threshold voltage (V_IT–) of 2.2 V with ±0.5% typical accuracy across –40°C to +125°C. This value is laser-trimmed and non-adjustable, ensuring consistent brownout detection without external components or calibration.

Does TLV803EA22DBZR require an external pull-up resistor on the RESET pin?

Yes, TLV803EA22DBZR uses an open-drain, active-low output topology and requires an external pull-up resistor (typically 10 kΩ to V_CC) on the RESET pin to generate a valid logic-high level when deasserted. This enables voltage-level translation and wired-OR reset bus configurations.

What is the minimum supply voltage at which TLV803EA22DBZR guarantees correct reset behavior?

TLV803EA22DBZR guarantees defined output state down to V_DD = 0.7 V (VPOR), meaning it will assert a valid active-low reset signal even during deep brownout or capacitor discharge events - a key advantage over supervisors requiring ≥1.0 V minimum.

Can TLV803EA22DBZR replace MAX803 in existing designs?

TLV803EA22DBZR is pin-compatible with MAX803 variants in SOT-23-3 packages and shares the same 2.2 V threshold, but differs in output topology (open-drain vs. push-pull) and reset delay (40 µs vs. 140 ms). Board-level changes to the pull-up network and timing validation are required for direct substitution.

How does the 40 µs reset delay of TLV803EA22DBZR affect system startup timing?

The 40 µs fixed delay ensures the TLV803EA22DBZR holds reset long enough for internal MCU clock stabilization and power rail settling, while avoiding unnecessary boot delays. It aligns precisely with fast-boot microcontrollers like ARM Cortex-M0+ and RISC-V cores requiring minimal reset assertion time.