Texas Instruments TPS3899DL11DSER

Overview

TPS3899DL11DSER 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, 125 nA 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 TPS3899DL11DSER datasheet, TPS3899DL11DSER pinout, TPS3899DL11DSER application, or TPS3899DL11DSER equivalent, key selection considerations include its 0.505 V adjustable threshold, 1.5 mm × 1.5 mm WSON-6 (DSE) package, dual-capacitor delay programming, separate SENSE/VDD pins for rail redundancy, and built-in 5% hysteresis to suppress false resets.

Technical Context

The TPS3899DL11DSER implements a precision comparator with independent SENSE and VDD inputs, enabling monitoring of voltage rails distinct from its supply. Its internal reference delivers ±0.5% VIT− accuracy across −40°C to +125°C, and built-in 5% hysteresis prevents chatter during threshold crossings.

Sense assertion delay (tD-SENSE) and reset deassertion delay (tD) are independently programmed via external capacitors on CTS and CTR pins, with base delays of 50 µs and 80 µs when floating, scalable up to ~6.2 s using ≤10 µF capacitors. Glitch immunity on SENSE is specified at 10 µs for 5% overdrive.

Key Specifications

Pinout & Package

TPS3899DL11DSER uses a 6-pin WSON (DSE) package with 0.5 mm pitch and wettable flanks, optimized for automated optical inspection 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 TPS3899PL11DSER, the TPS3899DL11DSER offers greater interface flexibility via open-drain output but requires a pull-up resistor; versus TLV809EDBZR, it delivers 20× lower quiescent current, adjustable threshold, and dual-programmable delay-critical for advanced automotive power sequencing.

Availability

TPS3899DL11DSER 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 compliance.

Supply support for TPS3899DL11DSER 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 automotive, industrial, and personal electronics markets.

The TPS3899-Q1 product line was designed specifically for high-reliability automotive power monitoring, emphasizing nano-power operation, precision thresholding, and programmable timing to replace discrete RC-based reset circuits in ADAS and electrification systems.

FAQ

What is the function of the CTS and CTR pins on the TPS3899DL11DSER?

The CTS pin sets the sense delay-the time between SENSE voltage falling below VIT− and RESET assertion-while the CTR pin sets the reset delay-the time between SENSE rising above VIT− + VHYS and RESET deassertion. Both pins accept ground-referenced capacitors to scale delays from 50 µs/80 µs (floating) up to ~6.2 s (10 µF). The TPS3899DL11DSER uses internal 500 kΩ pull-ups on these pins to establish baseline timing without external components.

Does the TPS3899DL11DSER require an external pull-up resistor on the RESET pin?

Yes, the TPS3899DL11DSER features an open-drain active-low RESET output, so an external pull-up resistor is mandatory to define the high-state voltage level. The pull-up can connect to any rail up to 6 V, independent of VDD, allowing interface with diverse logic families. Typical values range from 10 kΩ to 100 kΩ depending on rise-time and bus loading requirements. This design is inherent to the TPS3899DL11DSER's DL variant configuration.

Can the TPS3899DL11DSER monitor a voltage rail different from its own supply voltage?

Yes, the TPS3899DL11DSER supports true rail redundancy via separate SENSE and VDD pins. SENSE accepts 0–6 V inputs regardless of VDD value (0.85–6 V), enabling monitoring of a 1.2 V core rail while powered from a 3.3 V I/O supply-or vice versa. This isolation prevents single-point failure and is explicitly validated in the TPS3899DL11DSER's AEC-Q100 test plan for automotive reliability.

What is the minimum operating voltage for the TPS3899DL11DSER's VDD pin?

The TPS3899DL11DSER operates down to 0.85 V on the VDD pin, with guaranteed functionality across the full −40°C to +125°C automotive temperature range. Below 0.85 V, the device enters undefined state per VPOR specification (700 mV min), and RESET behavior cannot be assured. This 0.85 V minimum enables compatibility with emerging ultra-low-voltage automotive subsystems, a key design target of the TPS3899DL11DSER family.

How does the TPS3899DL11DSER handle voltage transients on the SENSE pin?

The TPS3899DL11DSER provides 10 µs glitch immunity for SENSE transients exceeding 5% overdrive (|VSENSE/VIT− − 1| × 100%), as characterized in Section 6.6 of its datasheet. For noisy environments like radar ECUs, adding a 10–100 nF ceramic capacitor from SENSE to GND further attenuates high-frequency coupling. This transient resilience is integral to the TPS3899DL11DSER's qualification for safety-critical automotive domains.