Texas Instruments TLV840MADL13DBVR

Overview

TLV840MADL13DBVR from Texas Instruments is a nano-power voltage supervisor IC with adjustable reset time delay, designed for ultra-low-voltage monitoring in battery-powered and industrial systems. It features 0.7 V to 6 V operating range, ±0.5% typical threshold accuracy at 1.3 V, 120 nA typical supply current, and open-drain active-low RESET output - enabling precise power-on reset control in microcontroller-based motor drives and factory automation.

For engineers reviewing the TLV840MADL13DBVR datasheet, TLV840MADL13DBVR pinout, TLV840MADL13DBVR application, or TLV840MADL13DBVR equivalent, key selection criteria include programmable CT-pin delay (40 µs minimum), manual reset (MR) support, SOT-23-5 package compatibility, and guaranteed operation from –40°C to +125°C across full voltage range.

Technical Context

The TLV840MADL13DBVR implements a precision bandgap-referenced comparator with built-in 5% typical hysteresis (VHYS) and glitch immunity (10 µs pulse rejection). Its detection threshold is factory-set to 1.3 V (VIT−), with propagation delay tP_HL of 30 µs typical when VDD falls below VIT−.

Reset assertion is triggered on VDD undervoltage or MR low input; deassertion requires VDD > VIT− + VHYS plus user-programmable tD via external capacitor on CT pin. The MR pin has internal 100 kΩ pull-up and accepts logic-low pulses ≥500 ns to initiate reset.

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm max height, gull-wing leads, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3840DL13DBVR and MAX6373LASD13+T, TLV840MADL13DBVR uniquely combines nano-power operation, ±0.5% accuracy, MR input, and CT-programmable delay - making it the only option supporting both battery-life-critical and multi-rail sequencing requirements in a single SOT-23-5 footprint.

Availability

TLV840MADL13DBVR is available at Aetrix Electronics and suitable for motor drives, factory automation systems, and data center power management requiring stable component supply across extended temperature and low-power constraints.

Supply support for TLV840MADL13DBVR 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 and signal chain technologies.

The TLV840 family was engineered specifically for ultra-low-power voltage supervision in battery-operated and industrial edge devices - prioritizing nanoscale quiescent current, high threshold accuracy, and flexible reset timing without sacrificing ruggedness.

FAQ

What is the exact threshold voltage of TLV840MADL13DBVR?

The TLV840MADL13DBVR has a factory-set negative-going input threshold voltage (VIT−) of 1.3 V, with ±0.5% typical accuracy across –40°C to +125°C. This value is confirmed in the Electrical Characteristics table (Section 7.5) of the official TI datasheet SNVSBC3C, and applies directly to the "13" suffix in the part number, indicating the 1.3 V variant. The device does not support field-adjustable thresholds.

Does TLV840MADL13DBVR require an external pull-up resistor on the RESET pin?

Yes, TLV840MADL13DBVR uses an open-drain active-low RESET output (indicated by "DL" in the part number), so an external pull-up resistor is mandatory to establish a defined high state. The datasheet recommends a 100 kΩ resistor to VDD for typical applications, but values up to 1 MΩ are usable depending on VOL and rise-time requirements. No pull-up is needed for push-pull variants like TLV840PL.

How is the reset time delay configured on TLV840MADL13DBVR?

The reset time delay (tD) on TLV840MADL13DBVR is configured by connecting an external capacitor between the CT pin (Pin 5) and GND. With CT floating, tD defaults to 40 µs typical. Using Equation tD = 618937 × CCT + 80 µs (where CCT is in µF), a 0.047 µF capacitor yields ~29 ms delay - validated in TI's typical application circuit for rail sequencing. Capacitors up to 10 µF are supported.

What is the function of the MR pin on TLV840MADL13DBVR?

The MR (Manual Reset) pin on TLV840MADL13DBVR is an active-low input that forces RESET assertion regardless of VDD level when pulled below 0.3×VDD for ≥500 ns. It features an internal 100 kΩ pull-up to VDD, eliminating external biasing. This enables processor-GPIO-initiated system resets - a feature absent in TLV840N and TLV840C variants, and critical for diagnostics and safe shutdown in industrial controllers.

Is TLV840MADL13DBVR compatible with 0.7 V supply rails?

Yes, TLV840MADL13DBVR operates down to 0.7 V supply voltage (VDD), as specified in Recommended Operating Conditions (Section 7.3). At 0.7 V, it maintains functional reset assertion with VPOR = 700 mV, ensuring controlled output behavior during brownout. However, the 1.3 V threshold means it will assert RESET when VDD drops below 1.3 V - so it monitors rails ≥1.3 V, not the 0.7 V supply itself.