Texas Instruments TLV840MADL10DBVR

Overview

TLV840MADL10DBVR from Texas Instruments is a nano-power voltage supervisor IC with adjustable reset time delay, active-low open-drain RESET output, 1.0 V detection threshold, and manual reset (MR) input. It operates from 0.7 V to 6 V supply, draws only 120 nA typical quiescent current, and delivers ±0.5% threshold accuracy across –40°C to +125°C - used for reliable power-on reset and brownout protection in battery-powered industrial controllers.

For engineers reviewing the TLV840MADL10DBVR datasheet, TLV840MADL10DBVR pinout, TLV840MADL10DBVR application, or TLV840MADL10DBVR equivalent, key selection considerations include its capacitor-programmable reset delay (40 µs minimum), MR-triggered reset assertion, open-drain output compatibility with mixed-voltage systems, and SOT23-5 package suitability for space-constrained PCB layouts.

Technical Context

The TLV840MADL10DBVR implements a precision bandgap-based comparator with built-in 5% hysteresis to prevent chatter during voltage recovery, and integrates a timer circuit referenced to an internal 500 kΩ CT pin resistance for programmable delay. Its MR input directly controls reset assertion independent of VDD level, with 1 µs propagation delay from MR low to RESET assert.

Reset deassertion requires both VDD > VIT– + VHYS and expiration of the CT-programmed tD delay; the device remains in undefined state below VPOR = 700 mV, ensuring clean initialization during power ramp-up. Glitch immunity is guaranteed for transients <10 µs at 5% overdrive on VDD.

Key Specifications

Pinout & Package

SOT23-5 (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 TPS3840DL10DBVR and MAX6371LT10+T, TLV840MADL10DBVR uniquely combines nano-power consumption, MR input, and capacitor-programmable delay in a single SOT23-5 footprint - making it the only option for battery-powered systems requiring both low-quiescent-current supervision and software-controlled reset initiation.

Availability

TLV840MADL10DBVR is available at Aetrix Electronics and suitable for motor drives, factory automation systems, and data center power management requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for TLV840MADL10DBVR 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, with leadership in power management, signal chain, and high-reliability ICs.

The TLV840 family is designed specifically for ultra-low-power voltage monitoring in battery-operated and industrial systems, emphasizing nanoscale quiescent current, high threshold accuracy, and flexible reset timing control.

FAQ

What is the minimum operating voltage for TLV840MADL10DBVR?

The TLV840MADL10DBVR has a minimum operating voltage of 0.7 V, enabling supervision of sub-1 V logic rails such as 0.9 V FPGA cores or advanced microcontroller domains. Below 0.7 V, the device enters undefined state; VPOR is specified at 700 mV, below which RESET output behavior is not guaranteed. This allows TLV840MADL10DBVR to function earlier in power-up sequences than conventional supervisors.

How does the CT pin affect reset timing in TLV840MADL10DBVR?

The CT pin on TLV840MADL10DBVR sets the reset time delay (tD) via an external capacitor to ground. With CT floating, tD is 40 µs typical. Connecting a capacitor yields tD ≈ 618937 × CCT + 80 µs (CCT in µF). For example, a 100 nF capacitor gives ~62 ms delay. The internal 500 kΩ CT resistance defines the RC constant, and TLV840MADL10DBVR supports capacitors up to 10 µF for maximum ~6.2 s delay.

Can TLV840MADL10DBVR monitor multiple voltage rails simultaneously?

No - TLV840MADL10DBVR monitors a single VDD rail per device. However, multiple TLV840MADL10DBVR units can be deployed in parallel to supervise different rails (e.g., 1.0 V core and 3.3 V I/O), with their RESET outputs OR'd using diodes or wired-AND open-drain topology. Each TLV840MADL10DBVR must have its own CT capacitor if independent delay timing is required.

What is the purpose of the MR pin on TLV840MADL10DBVR?

The MR (Manual Reset) pin on TLV840MADL10DBVR provides an active-low hardware reset input, allowing a microcontroller GPIO or system controller to force a reset independently of VDD level. Driving MR low for ≥500 ns asserts RESET immediately; release of MR initiates tD delay before RESET deassertion, provided VDD > VIT– + VHYS. This enables safe firmware updates, watchdog recovery, and debug-mode resets.

Does TLV840MADL10DBVR require an external pull-up resistor on the RESET pin?

Yes - TLV840MADL10DBVR uses an open-drain active-low RESET output (denoted by "DL" in the part number), so an external pull-up resistor is mandatory to define the high-state voltage. The pull-up can connect to any voltage ≤6.5 V (e.g., 3.3 V or 5 V logic rail), decoupling RESET logic level from VDD. Typical values range from 10 kΩ to 100 kΩ depending on sink current and VOL requirements; 40 kΩ is recommended for 1.2 V VDD with 15 µA sink.