Texas Instruments TPS3899DL14DSER

Overview

TPS3899DL14DSER 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 CTS/CTR pins. It operates from 0.85V to 6V supply and monitors external rails independently via the high-impedance SENSE pin - ideal for battery-powered metering and industrial control systems where rail redundancy and ultra-low power are critical.

For engineers reviewing the TPS3899DL14DSER datasheet, TPS3899DL14DSER pinout, TPS3899DL14DSER application, or TPS3899DL14DSER equivalent, key selection considerations include its open-drain active-low RESET output, 0.8V fixed threshold (DL14 variant), 1.5mm × 1.5mm WSON-6 package, –40°C to +125°C operation, and dual-capacitor-programmable timing for glitch-immune voltage and push-button monitoring.

Technical Context

The TPS3899DL14DSER implements a precision comparator with built-in 5% hysteresis and separate VDD/SENSE paths to support redundant monitoring of independent voltage rails. Its CTS and CTR pins use internal 500kΩ pull-ups and voltage-threshold-triggered RC timing (VTH_CTS = VTH_CTR = 0.73 × VDD) to generate user-adjustable assertion and deassertion delays - enabling robust immunity to transients and manual reset functionality.

This variant features a fixed 0.8V negative-going threshold (DL14 suffix), open-drain active-low RESET output, and supports external pull-up to any rail ≤6V. The SENSE pin accepts 0–6V inputs regardless of VDD, allowing monitoring of higher-voltage rails while powered from low-voltage supplies - a key enabler for multi-rail systems in building automation and data center equipment.

Key Specifications

Pinout & Package

Package: WSON-6 (DSE), 1.5mm × 1.5mm, 0.5mm pitch, exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3899PL14DSER, the TPS3899DL14DSER requires an external pull-up but offers greater interface flexibility (e.g., mixed-voltage systems). Compared with TPS3897DL14DSER, it trades 75nA higher IQ for full programmability - essential for adaptive timing in variable-load or noise-prone environments.

Availability

TPS3899DL14DSER is available at Aetrix Electronics and suitable for electricity meters, building automation controllers, and body control modules requiring stable component supply, long-term lifecycle support, and guaranteed traceability for industrial and automotive programs.

Supply support for TPS3899DL14DSER 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 deep expertise in precision analog, low-power design, and functional safety.

The TPS3899 product line delivers nano-power, programmable-supervision ICs optimized for battery longevity, rail redundancy, and robust push-button monitoring in industrial, automotive, and infrastructure applications.

FAQ

What is the exact threshold voltage of the TPS3899DL14DSER?

The TPS3899DL14DSER has a fixed negative-going threshold voltage of 0.8V, as indicated by the "14" suffix in its part number per TI's naming convention. This value is factory-trimmed with ±0.5% typical accuracy across –40°C to +125°C, and applies to the SENSE pin input - not VDD. The device asserts RESET when SENSE falls below 0.8V (after CTS delay) and releases RESET when SENSE rises above 0.8V + 5% hysteresis (0.84V nominal).

Does the TPS3899DL14DSER require an external pull-up resistor on the RESET pin?

Yes, the TPS3899DL14DSER features an open-drain active-low RESET output and requires an external pull-up resistor to establish the logic-high state. The pull-up may connect to any voltage rail up to 6.0V - independent of the VDD supply - enabling interface with higher-voltage logic families. Typical values range from 10kΩ to 100kΩ depending on rise-time and capacitive load requirements.

How do the CTS and CTR pins function in the TPS3899DL14DSER?

In the TPS3899DL14DSER, the CTS pin controls the sense delay (RESET assertion timing) and the CTR pin controls the reset delay (RESET deassertion timing). Both pins use internal 500kΩ pull-ups and trigger at 0.73×VDD. With no capacitor, typical delays are 50µs (CTS) and 80µs (CTR); adding capacitors scales delay linearly - e.g., 100nF yields ~65ms, and 1µF yields ~655ms - enabling precise adaptation to system power-up profiles and button-debounce needs.

Can the TPS3899DL14DSER monitor a voltage rail higher than its VDD supply?

Yes, the TPS3899DL14DSER can monitor voltage rails up to 6.0V on the SENSE pin while powered from as low as 0.85V on VDD. This is enabled by its high-impedance SENSE input (leakage ≤0.1µA) and internal level-shifting architecture. This capability allows supervision of 3.3V or 5V system rails using a low-power 1.8V or 0.85V supply - simplifying power architecture and improving fault isolation in multi-rail designs.

What is the operating temperature range specified for the TPS3899DL14DSER?

TPS3899DL14DSER is fully specified over an operating ambient temperature range of –40°C to +125°C. All key parameters - including threshold accuracy (±0.5%), hysteresis (5%), quiescent current (125nA typ), and timing delays - are guaranteed across this range. This makes the TPS3899DL14DSER suitable for under-hood automotive, industrial motor drives, and telecom infrastructure where extended thermal performance is mandatory.