Texas Instruments TLV840MADL29DBVR

Overview

TLV840MADL29DBVR from Texas Instruments is a nano-power voltage supervisor IC with active-low open-drain reset output, 2.9 V detection threshold, capacitor-programmable reset delay, and manual reset input. It operates from 0.7 V to 6 V, draws only 120 nA typical supply current, and features ±0.5% threshold accuracy with 5% hysteresis - enabling precise power monitoring in ultra-low-power industrial and battery-powered systems.

For engineers reviewing the TLV840MADL29DBVR datasheet, TLV840MADL29DBVR pinout, TLV840MADL29DBVR application, or TLV840MADL29DBVR equivalent, this page delivers verified specifications, validated pin functions, real-world timing behavior (including CT-pin programmability), and application-specific design guidance for rail sequencing, brownout protection, and manual system reset integration.

Technical Context

The TLV840MADL29DBVR implements a precision bandgap-based comparator with built-in hysteresis and glitch immunity, monitoring VDD against a factory-trimmed 2.9 V negative-going threshold (VIT−). Its internal timer circuit uses the CT pin to generate a user-defined reset time delay (tD) via external capacitor, with minimum tD = 40 µs when CT is floating.

It integrates an active-low manual reset (MR) input that directly asserts RESET independent of VDD level, with propagation delay <1 µs and pulse width requirement ≥500 ns. The open-drain RESET output supports flexible pull-up to any voltage ≤6.5 V, decoupling reset logic from VDD domain.

Key Specifications

Pinout & Package

Package: SOT-23-5 (DBV), 2.90 mm × 1.60 mm body size, surface-mount, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV840MADL29DBVR, TLV840MADL29DBVT offers identical performance in a different packaging format for manufacturing scalability, while TPS3840DL29DBVR provides a simplified, lower-cost alternative lacking MR and CT features - making it unsuitable for applications requiring programmable timing or hardware-initiated reset.

Availability

TLV840MADL29DBVR is available at Aetrix Electronics and suitable for motor drives, factory automation systems, and electronic point-of-sale terminals requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for TLV840MADL29DBVR 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 industrial and automotive ICs.

The TLV840 family is designed specifically for ultra-low-power voltage supervision in battery-operated and energy-constrained systems, delivering nanoscale quiescent current without sacrificing accuracy, timing control, or robustness.

FAQ

What is the minimum reset time delay achievable with TLV840MADL29DBVR?

The TLV840MADL29DBVR achieves a minimum reset time delay of 40 µs (typical) when the CT pin is left floating or connected to GND. This fixed minimum delay is guaranteed across –40°C to +125°C and does not require any external capacitor, simplifying designs where minimal hold-off time is sufficient for processor initialization.

Does TLV840MADL29DBVR require an external pull-up resistor on the RESET pin?

Yes, TLV840MADL29DBVR uses an open-drain active-low RESET output (denoted by "DL" in the part number), so an external pull-up resistor is mandatory. The resistor value must be selected based on sink current (≤500 µA max) and desired VOL (≤300 mV), typically 10 kΩ–100 kΩ to VDD or another logic rail up to 6.5 V.

Can TLV840MADL29DBVR monitor a 1.8 V supply rail?

No - TLV840MADL29DBVR has a fixed 2.9 V detection threshold (VIT−), making it unsuitable for monitoring 1.8 V rails. For 1.8 V supervision, select TLV840MADL18DBVR (1.8 V variant) or TLV840MADL20DBVR (2.0 V), both sharing identical package, features, and performance characteristics.

How does the manual reset (MR) pin interact with the voltage-monitoring function in TLV840MADL29DBVR?

In TLV840MADL29DBVR, the MR pin operates independently of VDD level: pulling MR low asserts RESET regardless of whether VDD is above or below 2.9 V. After MR returns high, RESET deasserts only after the programmed tD delay expires - ensuring deterministic reset release timing even during brownout conditions.

What is the maximum capacitor value supported on the CT pin of TLV840MADL29DBVR?

The recommended maximum capacitor value for the CT pin is 10 µF. Larger values risk incomplete discharge during short-duration voltage faults, causing shorter-than-expected reset delays. At 10 µF, TLV840MADL29DBVR delivers ~6.2 s typical tD, balancing timing range with reliability across temperature and fault profiles.