Texas Instruments TPS3899DL20DSER

Overview

TPS3899DL20DSER from Texas Instruments is a nano-power, AEC-Q100 Grade 1 automotive voltage supervisor with open-drain active-low RESET output, ±0.5% threshold accuracy, 125nA typical quiescent current, and programmable sense/reset delay via external capacitors on CTS and CTR pins. It monitors critical rails or push-button signals in ADAS camera modules and radar ECUs where ultra-low power and precise reset timing are essential.

For engineers reviewing the TPS3899DL20DSER datasheet, TPS3899DL20DSER pinout, TPS3899DL20DSER application, or TPS3899DL20DSER equivalent, this page delivers verified functional identity, validated 6-pin WSON package mapping, confirmed threshold (0.505V adjustable), hysteresis (5%), delay range (50µs–6.2s), and automotive-grade reliability data - all directly traceable to TI's SLVSG89B production datasheet.

Technical Context

The TPS3899DL20DSER implements a dual-capacitor-programmable timing architecture: CTS sets sense delay (assertion) with 50µs base and up to 6.2s using 10µF; CTR sets reset delay (deassertion) with 80µs base and identical 10µF scalability. Its separate SENSE and VDD pins enable rail-independent monitoring, while built-in 5% hysteresis prevents chatter during marginal voltage transitions.

As an open-drain active-low supervisor, it requires an external pull-up resistor (to any rail ≤6V) and supports 0.85V–6V supply operation. The device achieves ±0.5% VIT− accuracy over –40°C to +125°C and features glitch immunity of 10µs at 5% VIT− overdrive - critical for noisy automotive environments like infotainment head units.

Key Specifications

Pinout & Package

Package: 1.5mm × 1.5mm WSON-6 (DSE), thermally enhanced, lead-free, RoHS-compliant surface-mount package optimized for space-constrained automotive PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3899PL20DSER, the TPS3899DL20DSER trades pull-up dependency for design flexibility in mixed-voltage interfaces; compared with MAX6375XR26T, it delivers 13× lower quiescent current, ±0.5% accuracy versus ±2%, and field-programmable timing - making it superior for AEC-Q100-compliant, battery-sensitive automotive systems.

Availability

TPS3899DL20DSER is available at Aetrix Electronics and suitable for Advance Driver Assistance Systems (ADAS), radar electronic control units (ECUs), and automotive infotainment head units requiring stable component supply, long-term automotive lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for TPS3899DL20DSER 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for automotive, industrial, and personal electronics markets.

The TPS3899-Q1 product line was designed specifically for automotive voltage supervision - integrating nano-power operation, AEC-Q100 qualification, and programmable timing to replace discrete RC-based reset circuits in ADAS, gateway, and body electronics.

FAQ

What is the function of the CTS pin on the TPS3899DL20DSER?

The CTS pin on the TPS3899DL20DSER sets the sense delay - the time between SENSE voltage falling below VIT− and RESET assertion. With no capacitor, it provides a 50µs base delay; adding a capacitor (0–10µF) scales delay up to 6.2s. It also functions as a manual reset input: pulling CTS low forces immediate RESET assertion, independent of SENSE voltage.

Does the TPS3899DL20DSER require an external pull-up resistor on the RESET pin?

Yes, the TPS3899DL20DSER has an open-drain active-low RESET output and requires an external pull-up resistor to a valid logic rail (1.2V–6V). The resistor value depends on rise time and bus capacitance; 10kΩ–100kΩ is typical. This pull-up defines the high-state voltage level seen by downstream logic, enabling interface with diverse voltage domains.

What is the minimum operating voltage for the TPS3899DL20DSER?

The TPS3899DL20DSER operates from 0.85V to 6V on the VDD pin. Below 0.85V, internal circuitry cannot guarantee proper reset behavior; VPOR (power-on reset threshold) is 700mV, meaning the device asserts RESET until VDD exceeds this level and stabilizes. This low minimum enables use with depleted batteries or ultra-low-voltage subsystems.

How does the TPS3899DL20DSER achieve ±0.5% threshold accuracy?

The TPS3899DL20DSER achieves ±0.5% VIT− accuracy through laser-trimmed internal reference circuitry and matched comparator design, validated across –40°C to +125°C. This specification applies to the 0.505V adjustable version and is confirmed in TI's SLVSG89B datasheet Section 6.5 - enabling precise brownout detection without calibration in production.

Can the TPS3899DL20DSER monitor a voltage higher than its VDD supply?

Yes, the TPS3899DL20DSER SENSE pin accepts 0–6V regardless of VDD voltage, allowing it to monitor rails higher than its own supply (e.g., VDD = 3.3V, SENSE = 5V or 12V via resistor divider). The high-impedance input (≤0.1µA leakage) minimizes loading, and the internal comparator operates independently of VDD - a key feature for redundant monitoring architectures.