Texas Instruments TPS3870J4330DSERQ1

Overview

TPS3870J4330DSERQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive overvoltage reset IC in a 6-pin WSON (DSE) package, monitoring supply rails with ±0.7% threshold accuracy across –40°C to +125°C, fixed 3.30 V OV trip point, 4% tolerance, and dual-mode time delay (10 ms or 200 ms) selectable via CT pin configuration. It serves as a safety-critical voltage supervisor for processor core rail monitoring in ADAS and HEV/EV power domains.

For engineers reviewing the TPS3870J4330DSERQ1 datasheet, TPS3870J4330DSERQ1 pinout, TPS3870J4330DSERQ1 application, or TPS3870J4330DSERQ1 equivalent, key selection considerations include its ±0.7% OV threshold accuracy over temperature, open-drain active-low RESET output with latch mode, manual reset (MR) support, internal glitch immunity (3.5 µs at 5% overdrive), and programmable time delay using a single external capacitor on CT.

Technical Context

The TPS3870J4330DSERQ1 implements a precision comparator with trimmed internal resistor divider and reference, eliminating external components for threshold setting. Its OV detection path includes built-in hysteresis (0.3–0.8% of VIT+) and analog glitch filtering to prevent false resets during transients.

Time delay is determined by CT pin state: floating → 10 ms nominal, pulled to VDD via 10 kΩ → 200 ms nominal, or connected to ground via capacitor → user-programmable delay (e.g., 0.1–1000 nF yields ~0.1–500 ms). MR input supports logic-level hard reset with 1 µs minimum pulse width and 500 ns propagation delay.

Key Specifications

Pinout & Package

Package: 6-pin WSON (DSE), 1.50 mm × 1.50 mm, 0.5 mm pitch, wettable flank - optimized for automotive PCB assembly and thermal performance (RθJA = 184.2°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3870J4330DSERQ1, the TPS3870J4330DSER offers identical functionality without AEC-Q100 validation, while TLV809E33DBZR trades accuracy, timing flexibility, and automotive qualification for smaller footprint and lower cost in non-safety applications.

Availability

TPS3870J4330DSERQ1 is available at Aetrix Electronics and suitable for advanced driver assistance systems (ADAS), automotive camera modules, and hybrid electric vehicle (HEV) battery management requiring stable component supply with full automotive qualification traceability.

Supply support for TPS3870J4330DSERQ1 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-grade power management and signal chain solutions.

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

FAQ

What is the overvoltage threshold voltage and accuracy of the TPS3870J4330DSERQ1?

The TPS3870J4330DSERQ1 has a fixed overvoltage threshold of 3.30 V with ±0.7% accuracy over the full operating temperature range of –40°C to +125°C. This specification is guaranteed in production testing and applies to all units shipped. The TPS3870J4330DSERQ1 achieves this accuracy using an internal trimmed resistor divider and precision voltage reference, eliminating dependency on external component tolerances.

How does the CT pin configure the reset time delay for the TPS3870J4330DSERQ1?

The CT pin on the TPS3870J4330DSERQ1 selects among three time delay modes: floating → 10 ms nominal delay, pulled to VDD via 10 kΩ → 200 ms nominal delay, or connected to ground via capacitor → user-programmable delay (e.g., 100 nF yields ~20 ms). The device evaluates CT state each time SENSE enters the valid window, with a 450 µs detection latency. All modes are factory-trimmed for precision.

Does the TPS3870J4330DSERQ1 support manual reset functionality?

Yes, the TPS3870J4330DSERQ1 includes a dedicated MR (manual reset) input pin. Driving MR low ≤0.3 V for ≥1 µs forces the RESET output low regardless of SENSE voltage. After MR returns high, RESET remains low for the full reset delay time (tD) before deasserting, provided SENSE is within the safe window. When unused, MR may be left floating due to internal VDD pull-up.

What package type and thermal characteristics does the TPS3870J4330DSERQ1 use?

The TPS3870J4330DSERQ1 uses a 6-pin WSON (DSE) package measuring 1.50 mm × 1.50 mm with 0.5 mm pitch. Its thermal resistance is RθJA = 184.2°C/W (junction-to-ambient) and RθJB = 86.4°C/W (junction-to-board), supporting operation up to +125°C ambient. The wettable flank design enables automated optical inspection (AOI) in automotive PCB assembly.

Is the TPS3870J4330DSERQ1 pin-compatible with other members of the TPS3870-Q1 family?

Yes, all TPS3870-Q1 variants-including TPS3870J4330DSERQ1-share identical 6-pin WSON (DSE) packaging and pinout. Electrical differences (threshold voltage, time delay options, tolerance) are implemented internally and do not affect board layout. This allows drop-in replacement across voltage and timing variants during design iteration or supply chain substitution.