Texas Instruments TPS3899DL09DSER

Overview

TPS3899DL09DSER from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade nano-power 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/CTR pins. It monitors critical rails or push-button inputs in ADAS camera modules and radar ECUs where ultra-low power and precise reset timing are essential.

For engineers reviewing the TPS3899DL09DSER datasheet, TPS3899DL09DSER pinout, TPS3899DL09DSER application, or TPS3899DL09DSER equivalent, key selection criteria include its 0.505V adjustable VIT− threshold, 5% built-in hysteresis, 1.5mm × 1.5mm WSON-6 package, and independent SENSE/VDD pins enabling rail redundancy in safety-critical systems.

Technical Context

The TPS3899DL09DSER implements a precision comparator with separate SENSE and VDD inputs, enabling monitoring of voltage rails independent of its supply. Its internal reference delivers ±0.5% VIT− accuracy over −40°C to +125°C, and built-in 5% hysteresis prevents chatter during threshold crossings.

Sense and reset delays are independently programmed via external capacitors on CTS (sense assertion) and CTR (reset deassertion), with base delays of 50µs and 80µs when pins float. The open-drain RESET output requires an external pull-up and supports interface voltages up to 6.0V regardless of VDD.

Key Specifications

Pinout & Package

TPS3899DL09DSER is housed in a 6-pin, 1.5mm × 1.5mm WSON (DSE) package with wettable flanks for automated optical inspection. Pin 1 is marked by a dot; top-side marking includes "DL09" and TI logo.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3899PL09DSER, the TPS3899DL09DSER offers greater flexibility in interface voltage translation but requires a pull-up; versus MAX6375XR29+T, it delivers 13× lower quiescent current, adjustable threshold, and dual-programmable timing - making it superior for AEC-Q100-compliant, battery-aware ADAS systems.

Availability

TPS3899DL09DSER is available at Aetrix Electronics and suitable for automotive ADAS camera modules, radar ECUs, and infotainment head units requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for TPS3899DL09DSER 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 specializing in analog, embedded processing, and automotive ICs, with decades of automotive qualification expertise and broad manufacturing scale.

The TPS3899-Q1 product line was designed specifically for AEC-Q100 Grade 1 automotive systems demanding ultra-low power, high-accuracy voltage monitoring, and robust push-button supervision - targeting ADAS, body electronics, and powertrain control units.

FAQ

What is the function of the CTS and CTR pins on the TPS3899DL09DSER?

The CTS pin sets the sense delay - the time between SENSE falling below VIT− and RESET assertion. The CTR pin sets the reset delay - the time between SENSE rising above VIT− + VHYS and RESET deassertion. Both accept ground-referenced capacitors; floating pins yield 50µs (CTS) and 80µs (CTR) base delays. This dual-delay architecture enables independent optimization of glitch immunity and power-rail stabilization timing in the TPS3899DL09DSER.

Does the TPS3899DL09DSER require an external pull-up resistor on the RESET pin?

Yes, the TPS3899DL09DSER features an open-drain active-low RESET output and requires an external pull-up resistor to the desired interface voltage rail (up to 6.0V). Typical values range from 10kΩ to 100kΩ depending on rise-time requirements and bus capacitance. This design allows the TPS3899DL09DSER to interface with MCUs operating at different voltage levels than its own VDD supply.

Can the TPS3899DL09DSER monitor a voltage rail higher than its VDD supply?

Yes, the SENSE pin accepts 0V to 6.0V independent of VDD, which operates from 0.85V to 6V. For example, the TPS3899DL09DSER can be powered from a 3.3V domain (VDD = 3.3V) while monitoring a 5V MCU supply on the SENSE pin - eliminating level shifters and simplifying power architecture in multi-rail automotive systems.

What is the significance of the 0.505V VIT− threshold in the TPS3899DL09DSER?

The 0.505V VIT− threshold enables precise supervision of ultra-low-voltage rails such as 0.6V CPU cores or 0.8V memory interfaces. When used with an external resistor divider on the SENSE pin, the TPS3899DL09DSER achieves accurate monitoring of rails far below its own minimum VDD, supporting next-generation low-power automotive SoCs where traditional 1V+ supervisors fall short.

How does the TPS3899DL09DSER achieve AEC-Q100 Grade 1 qualification?

The TPS3899DL09DSER meets AEC-Q100 Grade 1 through rigorous testing across −40°C to +125°C ambient temperature, HBM ±2kV ESD, and CDM ±750V ESD stress. Its design incorporates process controls, layout hardening, and characterization across full automotive temperature and voltage ranges - ensuring reliable reset behavior in engine control, camera, and radar applications where failure is not acceptable.