Texas Instruments TLV803EB29RDBZR

Overview

TLV803EB29RDBZR 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 2.93 V factory-programmed threshold (±0.5% typical accuracy), 40 µs fixed reset delay, 250 nA typical supply current, and operates across –40°C to +125°C. It is used in battery-powered microcontrollers, FPGA configuration circuits, and portable instrumentation to ensure deterministic system initialization.

For engineers reviewing the TLV803EB29RDBZR datasheet, TLV803EB29RDBZR pinout, TLV803EB29RDBZR application, or TLV803EB29RDBZR equivalent, key selection criteria include its guaranteed operation down to 0.7 V VDD, integrated glitch immunity (10 µs), SOT-23-3 (DBZ) package with pin 1 = RESET, and compatibility with manual reset (MR) input in X2SON variants - though MR is not present in this DBZ variant.

Technical Context

The TLV803EB29RDBZR implements a precision bandgap-referenced comparator with built-in hysteresis (1.2% typical) to prevent chatter during threshold crossing. Its open-drain output requires an external pull-up resistor and asserts low when VDD falls below 2.93 V, holding for exactly 40 µs after VDD rises above the hysteresis-adjusted rising threshold (VIT+ ≈ 2.965 V).

It integrates glitch immunity logic that ignores transients shorter than 10 µs on VDD, enabling robust operation in electrically noisy environments such as industrial sensor nodes or metering front-ends. The device guarantees defined output state down to VPOR = 0.7 V, supporting deep brownout recovery in energy-harvesting systems.

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 - confirmed per TI SLVSES2J Figure 6-3 and Table 6-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EA29RDBZR and MAX803SUR29+T, TLV803EB29RDBZR uniquely delivers 40 µs reset timing with sub-µA IQ and 0.7 V VPOR - making it optimal for FPGA, ultra-low-power MCU, and energy-harvesting applications where speed, efficiency, and deep-brownout resilience are jointly critical.

Availability

TLV803EB29RDBZR is available at Aetrix Electronics and suitable for electricity meters, portable medical devices, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TLV803EB29RDBZR 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 delivering analog and embedded processing solutions, with over 90 years of innovation in power management, signal chain, and timing products.

The TLV803E series belongs to TI's precision voltage supervisor product line, engineered specifically for ultra-low-power, high-accuracy reset generation in battery-operated, automotive, and industrial systems where reliability across extreme temperatures is mandatory.

FAQ

What is the exact reset threshold voltage of TLV803EB29RDBZR?

The TLV803EB29RDBZR has a factory-programmed falling threshold voltage (VIT–) of 2.93 V with ±0.5% typical accuracy across –40°C to +125°C. This value is laser-trimmed during production and does not require external resistors or calibration. The rising threshold (VIT+) is approximately 2.965 V due to 1.2% typical hysteresis, ensuring noise immunity during rail recovery. TLV803EB29RDBZR maintains this specification under all recommended operating conditions.

Does TLV803EB29RDBZR require an external pull-up resistor on the RESET pin?

Yes, TLV803EB29RDBZR uses an open-drain active-low output and requires an external pull-up resistor to a valid logic-high voltage (e.g., 3.3 V or 5 V). Typical values range from 10 kΩ to 100 kΩ depending on bus capacitance and rise-time requirements. Unlike push-pull variants (e.g., TLV809E), TLV803EB29RDBZR cannot drive high actively - the pull-up defines the asserted logic level and current-sinking capability remains intact at up to 2 mA.

What is the minimum supply voltage at which TLV803EB29RDBZR guarantees correct reset behavior?

TLV803EB29RDBZR guarantees a defined output state down to VPOR = 0.7 V, meaning it will assert RESET correctly even when VDD collapses to 0.7 V. Below this voltage, the output becomes undefined. This feature enables reliable brownout detection in energy-harvesting systems and ultra-low-VDD applications where other supervisors fail. The 0.7 V VPOR is specified in TI's SLVSES2J datasheet Section 7.5 and applies directly to TLV803EB29RDBZR.

Is TLV803EB29RDBZR pin-compatible with legacy MAX803-series supervisors?

Yes, TLV803EB29RDBZR is pin-to-pin compatible with MAX803/809/810 in the SOT-23-3 (DBZ) package, sharing identical pin 1 = RESET, pin 2 = GND, pin 3 = VDD layout. However, differences exist in reset delay (40 µs vs. 140 ms), IQ (250 nA vs. ~1.6 µA), and VPOR (0.7 V vs. 0.9 V). System-level validation is recommended before drop-in replacement, especially in timing-critical or ultra-low-power designs.

Can TLV803EB29RDBZR be used without a bypass capacitor on VDD?

No - TI explicitly recommends placing a 0.1 µF to 1 µF ceramic bypass capacitor between VDD and GND, close to the device pins. This capacitor stabilizes the internal bandgap reference and regulator during transient load changes and ensures clean power-up sequencing. Omitting it risks erratic reset behavior, delayed assertion, or failure to meet VPOR specification. The requirement is documented in Section 8.3.1 of the TLV803EB29RDBZR datasheet and applies universally across all operating conditions.