Texas Instruments TPS3801E18DCKR

Overview

TPS3801E18DCKR from Texas Instruments is a fixed-threshold voltage supervisor IC designed for power-on reset and supply monitoring in low-voltage digital systems. It features a 1.71 V ±2.5% detection threshold, 200 ms factory-programmed reset delay, push-pull RESET output, and operates from 1.6 V to 4 V supply. It is used in battery-powered microcontroller applications requiring reliable brownout protection.

For engineers reviewing the TPS3801E18DCKR datasheet, TPS3801E18DCKR pinout, TPS3801E18DCKR application, or TPS3801E18DCKR equivalent, this page delivers verified electrical parameters, SC-70 package layout, functional role in power sequencing, and validated alternative parts for design flexibility and supply continuity.

Technical Context

The TPS3801E18DCKR integrates a precision bandgap reference (1.14 V) and comparator to monitor VDD directly-no external resistor divider required. Its internal timer generates a fixed 200 ms RESET assertion after VDD rises above 1.71 V or falls below that threshold.

It lacks a manual reset (MR) input-unlike most TPS3801-xx variants-making it a dedicated fixed-threshold, single-supply monitor. The push-pull output drives RESET actively high or low without external pull-up, simplifying interface with 1.8 V logic domains.

Key Specifications

Pinout & Package

TPS3801E18DCKR uses the SC-70 (DCK) 5-pin surface-mount package: 2.0 mm × 1.25 mm body, 0.65 mm pitch, 1.1 mm max height. Pin 1 is marked by an index area at the top-left corner of the top view.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3801E18DCKR, the TPS3801-01DCKR adds configurability at the cost of extra components and layout complexity, while TLV803EB18DBVR trades push-pull drive and pin compatibility for lower quiescent current and smaller package count.

Availability

TPS3801E18DCKR is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, and smart meter communication modules requiring stable component supply across long production lifecycles.

Supply support for TPS3801E18DCKR 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 specializing in analog, embedded processing, and power management technologies, with decades of expertise in high-reliability supervisory circuits.

The TPS380x family was designed specifically for precise, low-power supply monitoring in DSP, microcontroller, and processor-based systems-emphasizing small size, factory-trimmed timing, and wide supply range.

FAQ

What is the exact reset threshold voltage of the TPS3801E18DCKR?

The TPS3801E18DCKR has a nominal reset threshold of 1.71 V, with guaranteed min/max values of 1.67 V and 1.75 V over –40°C to +85°C. This ±2.5% accuracy is achieved via internal trimming against a 1.14 V reference and applies directly to the VDD pin-no external components needed. The TPS3801E18DCKR does not use the SENSE pin; it monitors VDD exclusively.

Does the TPS3801E18DCKR include a manual reset (MR) input?

No, the TPS3801E18DCKR does not include a manual reset input. Unlike most TPS3801-xx variants (e.g., TPS3801J25DCKR), this specific part omits the MR function. Its pinout consists only of RESET, GND, VDD, GND, and NC (SENSE). This simplifies design for applications requiring only automatic power-on and brownout reset without user-initiated reset capability.

What is the function of Pin 5 (SENSE) on the TPS3801E18DCKR?

Pin 5 (SENSE) on the TPS3801E18DCKR is a no-connect (NC) terminal. As a fixed-threshold variant, the device monitors VDD directly and does not use the SENSE input. TI's datasheet explicitly states that SENSE is unused in the TPS3801E18DCKR and must be left unconnected. Connecting it may cause undefined behavior or threshold deviation.

Can the TPS3801E18DCKR drive a 1.8 V microcontroller reset pin directly?

Yes, the TPS3801E18DCKR can drive a 1.8 V microcontroller reset pin directly. Its push-pull RESET output sinks up to 5 mA and sources up to 5 mA, with VOL ≤ 0.4 V at 2 mA and VOH ≥ VDD – 0.4 V. At VDD = 1.8 V, VOH exceeds 1.4 V-well within the VIH requirement of typical 1.8 V logic. No external pull-up or level shifter is required.

Is the TPS3801E18DCKR RoHS-compliant and MSL-1 rated?

Yes, the TPS3801E18DCKR is RoHS-compliant (lead-free, NiPdAu finish) and rated MSL-1 (Moisture Sensitivity Level 1) with unlimited floor life at ≤30°C/60% RH. Per TI's Package Option Addendum, it ships in 3000-piece tape-and-reel (DCK package) and is qualified for standard Pb-free reflow profiles up to 260°C peak.