Texas Instruments TPS3899DL26DSER

Overview

TPS3899DL26DSER from Texas Instruments is a nano-power, precision voltage supervisor with push-button monitoring capability, featuring ±0.5% threshold accuracy, 125nA typical quiescent current, and programmable sense/reset delay via external capacitors on CTS/CTR pins. It operates across 0.85V–6V VDD and monitors rails independently via dedicated SENSE pin - used in battery-powered metering, industrial automation, and computing systems requiring reliable power-up sequencing and glitch-immune reset control.

For engineers reviewing the TPS3899DL26DSER datasheet, TPS3899DL26DSER pinout, TPS3899DL26DSER application, or TPS3899DL26DSER equivalent, key selection criteria include its open-drain active-low RESET output, 0.8V fixed threshold (DL26 variant), 1.5mm × 1.5mm WSON-6 package, –40°C to +125°C operation, and dual-capacitor programmability for independent assertion/deassertion timing.

Technical Context

The TPS3899DL26DSER implements a precision comparator with built-in 5% hysteresis and separate VDD/SENSE inputs enabling rail redundancy. Its internal reference and high-impedance SENSE pin support direct monitoring of voltages up to 6V - independent of VDD - with optional external resistor dividers for adjustable thresholds.

Reset assertion is triggered when SENSE falls below 0.8V (VIT−) for ≥50µs (CTS floating) and held low until SENSE rises above 0.84V (VIT− + VHYS) for ≥80µs (CTR floating); both delays are independently extended up to ~6.5s using external capacitors on CTS/CTR pins.

Key Specifications

Pinout & Package

TPS3899DL26DSER uses a 6-pin, 1.5mm × 1.5mm WSON package with wettable flanks, optimized for automated optical inspection and thermal performance in compact layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3899DL26DSER, the PL26 variant eliminates external pull-up dependency but lacks manual reset flexibility via CTS, while the TPS3897DL26DSER reduces IQ by 60% at the expense of programmable timing - making each optimal for distinct trade-offs in power, timing control, and interface simplicity.

Availability

TPS3899DL26DSER is available at Aetrix Electronics and suitable for electricity meters, building automation controllers, automotive body control modules, and enterprise SSDs requiring stable component supply, long-term lifecycle assurance, and guaranteed traceable sourcing.

Supply support for TPS3899DL26DSER 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, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.

The TPS3899 product line delivers ultra-low-power, high-accuracy voltage supervision with integrated push-button monitoring - designed specifically for battery-backed, safety-critical, and space-constrained systems demanding precision timing and rail independence.

FAQ

What is the exact threshold voltage of the TPS3899DL26DSER?

The TPS3899DL26DSER has a fixed negative-going input threshold (V_IT−) of 0.8V, confirmed by TI's device naming convention (DL26 = DL output, 0.8V threshold) and electrical characteristics table. This value is factory-trimmed and specified with ±0.5% accuracy over –40°C to +125°C, ensuring reliable brown-out detection for 3.3V and 5V supply rails without external resistors.

Does the TPS3899DL26DSER require an external pull-up resistor on the RESET pin?

Yes, the TPS3899DL26DSER features an open-drain active-low RESET output and requires an external pull-up resistor to a defined logic rail (up to 6V). The datasheet specifies a typical 100kΩ pull-up to VDD, but the resistor may connect to any compatible voltage domain - enabling level-shifting between different I/O voltages while maintaining clean reset assertion.

How do CTS and CTR capacitors affect reset timing in the TPS3899DL26DSER?

In the TPS3899DL26DSER, the CTS capacitor sets the sense delay (t_D-SENSE) - time from SENSE falling below 0.8V to RESET assertion - while the CTR capacitor sets the reset delay (t_D) - time from SENSE rising above 0.84V to RESET deassertion. Both follow t = 654.7kΩ × C + base delay (50µs/80µs), supporting programmable delays from microseconds to seconds with standard ceramic capacitors.

Can the TPS3899DL26DSER monitor a voltage rail higher than its VDD supply?

Yes, the TPS3899DL26DSER's SENSE pin accepts input voltages from 0V to 6.0V regardless of VDD, which operates from 0.85V to 6V. This allows monitoring of higher-voltage rails (e.g., 5V or 3.3V) while powering the supervisor from a lower auxiliary rail (e.g., 1.8V), enabling true rail independence and fault isolation in multi-supply systems.

Is the TPS3899DL26DSER qualified for automotive applications?

The TPS3899DL26DSER is specified for –40°C to +125°C operation and supports functional safety documentation, but it is not AEC-Q200 qualified. It is suitable for under-hood industrial and commercial automotive subsystems (e.g., BCM, infotainment power management) where full automotive qualification is not mandated - however, AEC-Q200 variants like TPS3899DL26DSER-Q1 must be selected for ASIL-B/C safety-critical functions.