Texas Instruments TPS3870J4080DSERQ1

Overview

TPS3870J4080DSERQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive overvoltage reset IC with fixed 0.80 V detection threshold, ±0.7% accuracy across –40°C to +125°C, 7 µA max quiescent current, and dual-mode time delay (10 ms fixed or 200 ms when CT pin tied to VDD). It monitors core voltage rails in ADAS processors and FPGA power domains to prevent system malfunction from supply overvoltage.

For engineers reviewing the TPS3870J4080DSERQ1 datasheet, TPS3870J4080DSERQ1 pinout, TPS3870J4080DSERQ1 application, or TPS3870J4080DSERQ1 equivalent, this page delivers verified functional role, exact threshold tolerance (±0.7%), factory-programmed delay options (10 ms / 200 ms), CT pin configuration logic, and automotive-grade thermal performance (–40°C to +125°C).

Technical Context

The TPS3870J4080DSERQ1 implements a precision comparator with internal trimmed resistor divider and reference to achieve ±0.7% OV threshold accuracy over temperature. Its SENSE and VDD pins are electrically isolated to support redundant monitoring architectures required in safety-critical automotive systems.

Reset timing is determined by CT pin state: open (10 ms), pulled to VDD via 10 kΩ (200 ms), or connected to capacitor (programmable). The device asserts active-low open-drain RESET only when SENSE exceeds 0.80 V by ≥5% overdrive, with 3.5 µs glitch immunity on VIT+ and 25 ns on MR.

Key Specifications

Pinout & Package

TPS3870J4080DSERQ1 uses a 6-pin WSON (DSE) package measuring 1.50 mm × 1.50 mm, optimized for space-constrained automotive PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar overvoltage reset applications.

Compared with TPS3870J4080DSERQ1, the TPS3870J4330DSERQ1 shares identical architecture but targets higher-voltage rails, while TLV809E25DBVR sacrifices accuracy, timing flexibility, and automotive qualification for lower cost and smaller footprint.

Availability

TPS3870J4080DSERQ1 is available at Aetrix Electronics and suitable for advanced driver assistance systems (ADAS), automotive camera modules, and HEV/EV battery management interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS3870J4080DSERQ1 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 specializing in analog and embedded processing technologies, with leadership in automotive, industrial, and power management solutions.

The TPS3870-Q1 product line delivers high-accuracy overvoltage supervision for safety-critical automotive subsystems, specifically engineered to meet AEC-Q100 Grade 1 requirements and simplify power-rail monitoring in ADAS and electrified vehicle platforms.

FAQ

What is the exact overvoltage threshold voltage of the TPS3870J4080DSERQ1?

The TPS3870J4080DSERQ1 has a fixed overvoltage threshold of 0.80 V, with ±0.7% accuracy across the full operating temperature range of –40°C to +125°C. This value is factory-trimmed and does not require external resistor configuration. The TPS3870J4080DSERQ1 achieves this precision using an internal trimmed resistor divider and precision voltage reference, eliminating tolerance errors from external components.

How does the CT pin configure reset delay timing on the TPS3870J4080DSERQ1?

The CT pin on the TPS3870J4080DSERQ1 selects between three timing modes: open (10 ms delay), tied to VDD via 10 kΩ (200 ms delay), or connected to a capacitor to ground (programmable delay). An internal state machine evaluates CT pin voltage within 450 µs after SENSE enters its valid window. The TPS3870J4080DSERQ1 does not require external timing resistors, ensuring consistent delay accuracy across production units.

Is the TPS3870J4080DSERQ1 qualified for automotive applications?

Yes, the TPS3870J4080DSERQ1 is AEC-Q100 qualified for Grade 1 (–40°C to +125°C ambient), with HBM ESD classification Level 2 (±2000 V) and CDM Level C7B (±500 V). It meets automotive reliability standards for use in ADAS, camera modules, and HEV/EV systems. The TPS3870J4080DSERQ1 undergoes rigorous testing for thermal cycling, humidity, and mechanical shock per AEC-Q100 requirements.

What is the quiescent current specification for the TPS3870J4080DSERQ1?

The TPS3870J4080DSERQ1 has a maximum quiescent current of 7 µA over the full operating range (1.7 V to 5.5 V, –40°C to +125°C), with a typical value of 4.5 µA at 25°C. This ultra-low current enables continuous monitoring in always-on automotive subsystems without compromising battery life. The TPS3870J4080DSERQ1 maintains this spec even during UVLO conditions below 1.7 V.

Does the TPS3870J4080DSERQ1 support manual reset functionality?

Yes, the TPS3870J4080DSERQ1 includes a dedicated MR (manual reset) pin that accepts a logic-low signal (<0.3 V) to assert RESET immediately, independent of SENSE voltage. After MR is deasserted, RESET remains low for the configured time delay (tD) before returning high. The MR pin features internal 100 kΩ pull-up, allowing it to float when unused. This function is fully integrated in the TPS3870J4080DSERQ1 and requires no external components.