Texas Instruments TPS3899PL31DSER

Overview

TPS3899PL31DSER from Texas Instruments is a nano-power, precision voltage supervisor with push-button monitoring capability, ±0.5% threshold accuracy, 125nA typical quiescent current, and independent programmable sense (CTS) and reset (CTR) delays. It operates across 1V–6V VDD and supports active-low push-pull RESET output, serving in battery-powered industrial systems requiring reliable power-on reset and glitch-immune rail monitoring.

For engineers reviewing the TPS3899PL31DSER datasheet, TPS3899PL31DSER pinout, TPS3899PL31DSER application, or TPS3899PL31DSER equivalent, key selection criteria include its 0.8V–5.4V fixed threshold range (in 100mV steps), 5% typical hysteresis, WSON-6 package footprint, and dual-capacitor delay programming for robust noise immunity in high-reliability embedded power sequencing.

Technical Context

The TPS3899PL31DSER implements a precision comparator with built-in 5% hysteresis and separate VDD/SENSE inputs, enabling independent monitoring of supply rails or push-button signals. Its CTS and CTR pins control independent timing paths: CTS sets assertion delay (30µs min, up to ~6.5s with 10µF), while CTR sets deassertion delay (40µs min, same max range).

It features three output topologies - DL (open-drain low), PL (push-pull low), and PH (push-pull high) - with TPS3899PL31DSER specifically configured as push-pull active-low. The SENSE input accepts 0–6V regardless of VDD, and internal 500kΩ pull-ups on CTS/CTR enable floating-pin default timing.

Key Specifications

Pinout & Package

TPS3899PL31DSER uses a 6-pin WSON package (1.5mm × 1.5mm, 0.5mm pitch) with wettable flanks for automated optical inspection. Pin 1 is CTR; pin 2 is CTS; pin 3 is GND; pin 4 is VDD; pin 5 is SENSE; pin 6 is RESET (push-pull active-low).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3899PL31DSER, the DL variant adds interface flexibility at the cost of an extra component, while the TPS3897PL31DSER reduces complexity and cost but sacrifices programmable timing and push-button support essential for field-serviceable systems.

Availability

TPS3899PL31DSER is available at Aetrix Electronics and suitable for electricity meters, building automation controllers, body control modules, and solid-state drives requiring stable component supply, long-term lifecycle assurance, and guaranteed traceable sourcing.

Supply support for TPS3899PL31DSER 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 industrial, automotive, and consumer markets.

The TPS3899 product line delivers ultra-low-power, high-accuracy voltage supervision with integrated push-button monitoring and dual-programmable delays - designed specifically for battery-powered and high-reliability embedded systems demanding deterministic reset behavior.

FAQ

What output topology does the TPS3899PL31DSER use, and how does it differ from other variants in the family?

The TPS3899PL31DSER uses a push-pull active-low RESET output, meaning it actively drives logic low during reset and high-impedance (not pulled) when released. Unlike the DL variant (open-drain), no external pull-up is required; unlike the PH variant, it does not assert high during fault. This simplifies interface with most microcontrollers' native active-low reset inputs while eliminating external components.

How is the reset threshold voltage determined for the TPS3899PL31DSER, and what is its exact value?

The TPS3899PL31DSER has a factory-programmed fixed threshold voltage of 3.1V, indicated by the "31" in its part number per TI's naming convention (01 = 0.505V, 08 = 0.8V, ..., 31 = 3.1V, 54 = 5.4V). Its accuracy is ±0.5% typical across –40°C to +125°C, ensuring reliable detection at 3.1V ±15.5mV under nominal conditions.

Can the TPS3899PL31DSER monitor a voltage rail different from its own supply voltage (VDD)?

Yes. The TPS3899PL31DSER features independent VDD and SENSE pins. VDD powers the IC (1V–6V), while SENSE monitors any voltage from 0V to 6V - including rails higher or lower than VDD. This enables redundancy in safety-critical systems, such as monitoring a 5V backup supply while powered from a 3.3V main rail, without level-shifting circuitry.

What is the role of the CTS and CTR pins on the TPS3899PL31DSER, and how do they affect timing behavior?

The CTS pin sets the sense delay (assertion time) - the duration between SENSE falling below 3.1V and RESET going low. The CTR pin sets the reset delay (deassertion time) - the duration between SENSE rising above 3.1V + hysteresis and RESET going high. Both accept 0–10µF capacitors; floating defaults yield ~30µs (CTS) and ~40µs (CTR), enabling precise, capacitor-tuned timing without firmware involvement.

Does the TPS3899PL31DSER support functional safety certification, and what documentation is available?

Yes, the TPS3899PL31DSER is functional safety-capable. Texas Instruments provides documentation including failure mode effect analysis (FMEA), diagnostic coverage reports, and safety manuals to support ISO 26262 ASIL-B and IEC 61508 SIL-2 system-level compliance efforts. These materials are accessible via TI's functional safety portal and are specific to the TPS3899PL31DSER device configuration.