Texas Instruments TPS3899DL43DSER

Overview

TPS3899DL43DSER 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/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 TPS3899DL43DSER datasheet, TPS3899DL43DSER pinout, TPS3899DL43DSER application, or TPS3899DL43DSER equivalent, key selection criteria include its 0.505V adjustable VIT− threshold, 5% typical hysteresis, 1.5mm × 1.5mm WSON-6 package, and dual-capacitor programmability for independent assertion/deassertion timing control under −40°C to +125°C operation.

Technical Context

The TPS3899DL43DSER implements a precision comparator with built-in 5% hysteresis (VHYS) referenced to VIT− = 0.505V, enabling stable rail monitoring despite noise. Its separate SENSE and VDD pins support redundant monitoring of independent voltage domains, decoupling supervision logic from supply rail integrity.

Sense delay (tD-SENSE) and reset delay (tD) are independently set via external capacitors on CTS and CTR pins, with base delays of 50µs and 80µs when floating-scalable up to ~6.2s using 10µF capacitors. Glitch immunity (tGI_VIT− = 10µs at 5% overdrive) ensures robustness against transient spikes on the SENSE input.

Key Specifications

Pinout & Package

TPS3899DL43DSER is housed in a 6-pin, 1.5mm × 1.5mm WSON (DSE) package with wettable flanks, optimized for automated optical inspection (AOI) and thermal performance in automotive environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3899PL43DSER, the TPS3899DL43DSER offers output voltage flexibility via external pull-up but requires one additional component; compared with TPS3897DL43DSER, it provides tighter threshold customization at the cost of slightly higher unit price and design complexity for resistor-divider configuration.

Availability

TPS3899DL43DSER is available at Aetrix Electronics and suitable for ADAS camera modules, radar ECUs, infotainment head units, automotive gateways, and battery-backed telematics requiring stable component supply across extended temperature and automotive lifecycle demands.

Supply support for TPS3899DL43DSER 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 delivers nano-power, AEC-Q100 qualified voltage supervisors with programmable timing and precision thresholds specifically for automotive subsystems demanding ultra-low quiescent current and high reliability under harsh environmental conditions.

FAQ

What is the exact VIT− threshold voltage for TPS3899DL43DSER?

The TPS3899DL43DSER features an adjustable negative-going input threshold (VIT−) of 0.505V (typical), factory-trimmed for ±0.5% accuracy across −40°C to +125°C. This value is confirmed in Section 6.5 of the official datasheet (SLVSG89B) and applies specifically to the "01" threshold suffix in the device nomenclature, which corresponds to the "43" in TPS3899DL43DSER per TI's naming convention.

Does TPS3899DL43DSER require an external pull-up resistor on the RESET pin?

Yes, TPS3899DL43DSER uses an open-drain active-low RESET output and requires an external pull-up resistor to a valid logic rail (≤6V). The datasheet specifies a nominal 100kΩ pull-up to VDD for characterization, but the resistor may be tied to any compatible voltage domain-including higher or lower than VDD-to interface with downstream logic levels. No pull-up is needed for push-pull variants like TPS3899PL43DSER.

How are sense and reset delays programmed on TPS3899DL43DSER?

Sense delay (tD-SENSE) and reset delay (tD) on TPS3899DL43DSER are independently programmed using external capacitors on the CTS and CTR pins, respectively. With no capacitor, base delays are 50µs (CTS) and 80µs (CTR); adding capacitance scales delay linearly-e.g., 100nF yields ~65ms, and 1µF yields ~620ms. Equations 2 and 3 in Section 7.3.2 of the datasheet define the exact relationship using RCT = 500kΩ (typical).

Is TPS3899DL43DSER qualified for automotive use?

Yes, TPS3899DL43DSER is AEC-Q100 qualified for automotive applications (Grade 1), with full specification over −40°C to +125°C ambient temperature, HBM ESD rating of ±2kV, and CDM rating of ±750V. The "Q1" suffix in the part number explicitly denotes automotive qualification, and all electrical, thermal, and reliability data in the datasheet reflect this grade.

Can TPS3899DL43DSER monitor a voltage rail different from its VDD supply?

Yes, TPS3899DL43DSER supports true dual-supply monitoring: the SENSE pin accepts input voltages from 0V to 6V independent of VDD, which itself operates from 0.85V to 6V. This allows monitoring of higher or lower rails (e.g., 5V analog supply while VDD = 3.3V) or isolated domains-critical for redundancy in ASIL-B/C systems-and is enabled by the separate SENSE/VDD pin architecture described in Section 3 and Figure 5-1 of the datasheet.