Texas Instruments TLV840NAPL50DBVR

Overview

TLV840NAPL50DBVR from Texas Instruments is a nano-power voltage supervisor IC with fixed 5.0 V detection threshold, active-low push-pull reset output, and factory-programmed 50 ms reset time delay. It operates from 0.7 V to 6 V supply, draws only 120 nA typical quiescent current, and delivers ±0.5% threshold accuracy with 5% built-in hysteresis - enabling reliable power-on reset and brownout protection in ultra-low-power microcontroller systems.

For engineers reviewing the TLV840NAPL50DBVR datasheet, TLV840NAPL50DBVR pinout, TLV840NAPL50DBVR application, or TLV840NAPL50DBVR equivalent, key selection considerations include its SOT23-5 package footprint, absence of manual reset (MR) and capacitor-programmable delay (CT), fixed 50 ms delay timing, push-pull active-low output eliminating external pull-up requirements, and guaranteed operation across –40°C to +125°C industrial temperature range.

Technical Context

The TLV840NAPL50DBVR implements a precision bandgap-based comparator with hysteresis to monitor VDD against a factory-trimmed 5.0 V negative threshold (VIT−). Reset assertion occurs when VDD falls below VIT−; deassertion requires VDD to rise above VIT− + VHYS (≈5.25 V) and expiration of the fixed 50 ms delay. No CT or MR pins are functional - both are internally disconnected (NC) per device variant definition.

This N-suffix variant lacks programmable delay circuitry and manual reset logic, distinguishing it from TLV840C/TLV840M families. Its push-pull output drives RESET low actively and high actively, supporting direct interface with MCU reset inputs without external components, while maintaining nanoscale supply current across full voltage and temperature ranges.

Key Specifications

Pinout & Package

SOT23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm height, gull-wing leads, RoHS-compliant, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3840DL50DBVR and MAX6375XR37+T, the TLV840NAPL50DBVR offers the lowest quiescent current (120 nA) and tightest threshold accuracy (±0.5%), making it optimal for battery-critical, precision-supervision roles - though its fixed 50 ms delay limits flexibility versus programmable alternatives.

Availability

TLV840NAPL50DBVR is available at Aetrix Electronics and suitable for motor drives, factory automation systems, and grid infrastructure equipment requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TLV840NAPL50DBVR 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 microcontrollers.

The TLV840 family was designed specifically for ultra-low-power voltage monitoring in battery-operated and industrial systems where nanoscale current, high accuracy, and wide temperature operation are essential - not general-purpose reset ICs.

FAQ

What is the function of the NC pins on TLV840NAPL50DBVR?

The TLV840NAPL50DBVR has two no-connect (NC) pins - Pin 4 and Pin 5 - which are internally unconnected and serve no electrical function. Per Texas Instruments' datasheet guidance, these pins may be left floating or tied to GND on the PCB. Neither pin supports manual reset (MR) nor capacitor-based delay (CT) functionality, as those features are excluded in the 'N' variant. This design simplifies layout and avoids unintended signal coupling.

Does TLV840NAPL50DBVR require an external pull-up resistor on the RESET pin?

No, TLV840NAPL50DBVR does not require an external pull-up resistor because it uses a push-pull, active-low output configuration. The RESET pin actively drives high and low, eliminating reliance on external components for logic-level translation. This contrasts with open-drain variants (e.g., TLV840NADL50DBVR) that mandate a pull-up. The push-pull architecture reduces BOM cost, improves noise immunity, and ensures faster rise/fall times - all inherent to the TLV840NAPL50DBVR design.

What is the exact reset delay timing for TLV840NAPL50DBVR and how is it implemented?

The TLV840NAPL50DBVR provides a factory-programmed, fixed reset time delay of 50 ms - confirmed in TI's device nomenclature ('E' suffix = 50 ms) and electrical characteristics table. Unlike C/M variants, this delay is not capacitor-programmable; it is implemented via on-chip timing circuitry with no external dependencies. The 50 ms interval begins when VDD rises above VIT− + VHYS (≈5.25 V) and ends with RESET deassertion, ensuring consistent, repeatable hold time across voltage and temperature without component tolerance drift.

Can TLV840NAPL50DBVR monitor a 3.3 V supply rail?

No, TLV840NAPL50DBVR is not suitable for monitoring a 3.3 V supply rail because its fixed detection threshold is 5.0 V. Attempting to use it on 3.3 V would result in permanent reset assertion, as VDD never reaches the 5.0 V trip point. For 3.3 V supervision, select a variant with matching threshold - e.g., TLV840NAPL33DBVR (3.3 V) - which shares identical nano-power performance, push-pull output, and 50 ms delay, but is trimmed to 3.3 V ±0.5%.

How does the hysteresis of TLV840NAPL50DBVR prevent false resets?

The TLV840NAPL50DBVR incorporates 5% built-in hysteresis (≈250 mV) around its 5.0 V threshold, meaning the release point is ~5.25 V while the trip point remains at 5.0 V. This gap prevents oscillatory reset behavior during slow-rising or noisy supply conditions - for example, if VDD sags to 4.95 V and recovers slowly, the output remains asserted until VDD exceeds 5.25 V. This design eliminates the need for external RC filtering and ensures robust operation in electrically harsh environments like motor drives and factory automation, as verified in TI's glitch immunity testing (tGI_VIT− = 10 µs).