Texas Instruments TLV840MADL30DBVR

Overview

TLV840MADL30DBVR from Texas Instruments is a nano-power ultra-low voltage supervisor IC with adjustable reset time delay, fixed 3.0 V detection threshold (±0.5% typical accuracy), 120 nA typical supply current, and open-drain active-low RESET output. It operates from 0.7 V to 6 V and supports industrial applications requiring precise power-on reset sequencing in battery-powered or low-voltage embedded systems.

For engineers reviewing the TLV840MADL30DBVR datasheet, TLV840MADL30DBVR pinout, TLV840MADL30DBVR application, or TLV840MADL30DBVR equivalent, key selection considerations include its capacitor-programmable reset delay (40 µs minimum), active-low manual reset (MR) input, built-in 5% hysteresis, –40°C to +125°C operating range, and SOT-23-5 (DBV) package compatibility with space-constrained PCB layouts.

Technical Context

The TLV840MADL30DBVR implements a precision bandgap-based voltage comparator with internal hysteresis and a programmable RC timing circuit tied to the CT pin. Its detection logic asserts RESET when VDD falls below 3.0 V (VIT−), and holds RESET low for tD after VDD rises above VIT− + VHYS (3.15 V typical).

It integrates an active-low manual reset (MR) input with 1 µs propagation delay and supports glitch immunity up to 10 µs at 5% overdrive. The open-drain RESET output requires an external pull-up and sinks up to 5 mA while maintaining VOL ≤ 300 mV at 15 µA sink current.

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 TPS3840DL30DBVR and MAX6373LASD30+T, TLV840MADL30DBVR delivers the lowest quiescent current, full delay programmability, and integrated manual reset-making it optimal for energy-sensitive, field-configurable, or safety-redundant supervision tasks.

Availability

TLV840MADL30DBVR is available at Aetrix Electronics and suitable for motor drives, factory automation systems, and electronic point-of-sale terminals requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TLV840MADL30DBVR 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 was designed specifically for ultra-low-power voltage monitoring in battery-operated and thermally constrained systems, emphasizing nanoscale quiescent current, precision threshold accuracy, and flexible reset timing.

FAQ

What is the minimum reset time delay achievable with TLV840MADL30DBVR?

The TLV840MADL30DBVR achieves a minimum reset time delay of 40 µs (typical) when the CT pin is left floating. This value is confirmed in the Electrical Characteristics table (Section 7.6) and applies across the full –40°C to +125°C temperature range. No external capacitor is required to reach this minimum delay, making TLV840MADL30DBVR suitable for fast-response applications such as processor core rail supervision where minimal hold time is critical.

Does TLV840MADL30DBVR require an external pull-up resistor on the RESET pin?

Yes, TLV840MADL30DBVR uses an open-drain active-low RESET output (denoted by "DL" in the part number), which requires an external pull-up resistor to establish a defined high state. The datasheet specifies a recommended 100 kΩ pull-up to VDD for standard operation, though values up to 1 MΩ are usable depending on rise-time and noise immunity requirements. TLV840MADL30DBVR does not include an internal pull-up on RESET, unlike push-pull variants.

Can TLV840MADL30DBVR monitor a 1.2 V supply directly?

No, TLV840MADL30DBVR has a fixed 3.0 V detection threshold and cannot monitor a 1.2 V rail directly. To supervise 1.2 V, a resistor divider must be used to scale the rail to 3.0 V at the VDD pin (e.g., 1.2 V × 2.5 = 3.0 V). The device's 0.7–6 V operating range supports this configuration, and its ±0.5% threshold accuracy ensures precise scaled detection. Divider resistor tolerances and temperature drift must be accounted for in system design.

What is the function of the MR pin on TLV840MADL30DBVR?

The MR (Manual Reset) pin on TLV840MADL30DBVR is an active-low input that forces the RESET output low regardless of VDD level when pulled to GND for ≥500 ns. It is internally pulled up to VDD (100 kΩ), so no external pull-up is needed. This feature enables external system control-such as a microcontroller GPIO or front-panel button-to initiate a hardware reset, making TLV840MADL30DBVR suitable for field-serviceable or user-triggered recovery scenarios.

Is TLV840MADL30DBVR qualified for automotive applications?

TLV840MADL30DBVR is not AEC-Q100 qualified and is specified for industrial temperature range (–40°C to +125°C), not automotive. While its operating range overlaps with some automotive ambient conditions, Texas Instruments does not certify or guarantee TLV840MADL30DBVR for automotive use cases such as engine control or ADAS. For automotive designs, engineers should select explicitly AEC-Q100 qualified supervisors like the TLV809 series or TPS3840-Q1 variants.