Texas Instruments TPS3899DL30DSER

Overview

TPS3899DL30DSER from Texas Instruments is a nano-power, precision voltage supervisor with push-button monitoring capability, ±0.5% threshold accuracy, 125nA typical quiescent current, and programmable sense/reset delay via external capacitors on CTS/CTR pins. It operates from 0.85V to 6V supply and monitors independent voltage rails or manual reset inputs in battery-powered industrial systems.

For engineers reviewing the TPS3899DL30DSER datasheet, TPS3899DL30DSER pinout, TPS3899DL30DSER application, or TPS3899DL30DSER equivalent, key selection considerations include its open-drain active-low RESET output, 0.505V adjustable threshold, 5% typical hysteresis, –40°C to +125°C operation, and 1.5mm × 1.5mm WSON-6 package for space-constrained designs.

Technical Context

The TPS3899DL30DSER implements a dual-capacitor-programmable timing architecture: CTS sets the assertion delay (sense delay) when SENSE falls below VIT–, while CTR sets the deassertion delay (reset delay) after SENSE rises above VIT– + VHYS. Its internal comparator features built-in 5% hysteresis to prevent false resets during rail fluctuations.

It supports decoupled monitoring - SENSE input accepts 0V–6V signals independent of VDD (0.85V–6V), enabling redundancy in high-reliability systems. The DL variant provides open-drain active-low RESET requiring an external pull-up resistor, compatible with interface voltages up to 6V regardless of VDD level.

Key Specifications

Pinout & Package

Package: 6-pin WSON (DSE), 1.5mm × 1.5mm, exposed thermal pad, moisture sensitivity level 2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3899PL30DSER, the TPS3899DL30DSER trades off external component requirement for greater flexibility in interface voltage translation; compared with TPS3897DL30DSER, it adds programmable delay and adjustable threshold at the cost of 40nA higher IQ - critical for adaptive power management in smart sensors.

Availability

TPS3899DL30DSER is available at Aetrix Electronics and suitable for electricity meters, building automation sensors, Body Control Modules (BCM), and solid-state drives requiring stable component supply across extended temperature and long-lifecycle deployments.

Supply support for TPS3899DL30DSER 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 specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and high-reliability ICs.

The TPS3899 product line delivers nano-power, precision voltage supervision with programmable timing for battery-critical and functional-safety-aware systems - designed specifically for industrial, automotive, and computing applications demanding long-term stability and rail redundancy.

FAQ

What is the function of the CTS pin on the TPS3899DL30DSER?

The CTS pin on the TPS3899DL30DSER sets the sense delay - the time between SENSE falling below VIT– and RESET assertion. When left floating, its internal 500kΩ pull-up yields ~50µs default delay; connecting a capacitor to ground extends this to up to ~6.5s. This pin also serves as a manual reset input and provides glitch immunity by ignoring short transients on the monitored rail.

Does the TPS3899DL30DSER require an external pull-up resistor on the RESET pin?

Yes, the TPS3899DL30DSER uses an open-drain active-low RESET output and requires an external pull-up resistor to define the logic-high voltage level. The resistor may connect to any voltage rail up to 6V - independent of the device's VDD - enabling flexible interface voltage translation in mixed-supply systems.

What is the minimum VDD voltage required for reliable operation of the TPS3899DL30DSER?

The TPS3899DL30DSER requires VDD ≥ 0.85V for guaranteed operation of the DL and PL output variants. Below this, the internal circuitry cannot maintain specified timing or threshold accuracy. Its VPOR (power-on reset) voltage is 700mV - below which the RESET state is undefined, making 0.85V the practical minimum for controlled supervision.

Can the TPS3899DL30DSER monitor a voltage rail higher than its VDD supply?

Yes, the TPS3899DL30DSER can monitor voltage rails up to 6V on the SENSE pin regardless of VDD level (0.85V–6V). This decoupling enables direct monitoring of higher-voltage rails - such as 5V or 12V (with external resistor divider) - while operating from a low-voltage MCU supply, supporting redundant supervision architectures.

How does the hysteresis specification of the TPS3899DL30DSER improve system reliability?

The TPS3899DL30DSER provides 5% typical hysteresis (VHYS) between VIT– and VIT– + VHYS, preventing rapid RESET toggling during slow-ramping or noisy supply conditions. This ensures clean, single-event reset assertion/deassertion - critical for avoiding processor lockup or firmware corruption in industrial and automotive environments.