Texas Instruments TLV803EF26DBZR

Overview

TLV803EF26DBZR 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 2.64 V threshold (±0.5% typical accuracy), 400 ms fixed reset delay, 250 nA typical supply current, and operates across –40°C to +125°C - enabling use in battery-powered industrial sensors and portable medical devices.

For engineers reviewing the TLV803EF26DBZR datasheet, TLV803EF26DBZR pinout, TLV803EF26DBZR application, or TLV803EF26DBZR equivalent, key selection criteria include its guaranteed reset assertion down to 0.7 V VDD, SOT-23-3 (DBZ) package with pin 1 = RESET, open-drain output requiring external pull-up, and compatibility with FPGA/ASIC power sequencing requirements.

Technical Context

The TLV803EF26DBZR implements a precision bandgap-referenced comparator with built-in hysteresis (1.2% typical) to prevent false resets during supply ripple. Its glitch immunity filter rejects transients ≤10 µs at 5% overdrive, ensuring robust operation in noisy environments like factory automation power rails.

It uses a state-machine-based timer to enforce a precise 400 ms (variant F) reset timeout after VDD rises above VIT+ (2.64 V + VHYS). The open-drain output supports flexible logic-level translation via external pull-up, while internal circuitry maintains defined output states down to VPOR = 0.7 V.

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 space-constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EC26DBZR, the TLV803EF26DBZR provides 40× longer reset hold time for systems with slow-ramping supplies; versus MAX803SUR26-T, it delivers 3× better threshold accuracy, 250× lower quiescent current, and full automotive-grade temperature support - critical for industrial reliability.

Availability

TLV803EF26DBZR is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, and smart energy meters requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for TLV803EF26DBZR 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 company delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TLV803E series belongs to TI's precision voltage supervisor product line, engineered specifically for ultra-low-power, high-accuracy power monitoring in battery-critical and harsh-environment applications.

FAQ

What is the exact reset threshold voltage of TLV803EF26DBZR?

The TLV803EF26DBZR has a factory-programmed falling threshold voltage (V_IT–) of 2.64 V with ±0.5% typical accuracy across –40°C to +125°C. This value is laser-trimmed during production and confirmed in TI's SLVSES2J datasheet Section 7.5. The rising threshold (V_IT+) equals V_IT– plus hysteresis (1.2% typical), ensuring stable reset release without chatter.

Does TLV803EF26DBZR require an external pull-up resistor?

Yes, TLV803EF26DBZR uses an open-drain, active-low output and requires an external pull-up resistor on the RESET pin. A 10 kΩ resistor to the monitored rail (e.g., 3.3 V) is recommended per TI's typical application circuit. Unlike push-pull variants (e.g., TLV809E), TLV803EF26DBZR cannot drive high internally - this design enables wired-OR reset buses and voltage-level translation.

What is the reset delay time for TLV803EF26DBZR and how is it implemented?

TLV803EF26DBZR provides a fixed 400 ms reset delay (variant F), measured from when VDD rises above V_IT+ until RESET deasserts. This delay is generated by an internal RC-based timer - no external components needed. The value is production-tested and specified in Section 7.6 of the datasheet, with typical variation of ±30% over temperature.

Can TLV803EF26DBZR operate reliably below 1.0 V supply voltage?

Yes - TLV803EF26DBZR guarantees functional reset assertion down to VDD = 0.7 V (VPOR), as documented in Section 7.5. Below this voltage, the output state is undefined. This capability enables early fault detection during deep brownouts, unlike many supervisors that cease operation near 1.0 V. Operation is fully characterized from 0.7 V to 6 V.

Is TLV803EF26DBZR pin-compatible with legacy MAX803 devices?

Yes, TLV803EF26DBZR is pin-to-pin compatible with MAX803SUR26-T and APX803-26 in the SOT-23-3 (DBZ) package, per TI's Device Comparison section. Pin 1 = RESET, Pin 2 = GND, Pin 3 = VDD. However, note differences: TLV803EF26DBZR offers 250 nA I_DD vs. ~1.2 µA for MAX803, and ±0.5% vs. ±1.5% threshold accuracy - direct replacement only if these improvements are acceptable.