Texas Instruments TPS3801T50DCKR

Overview

TPS3801T50DCKR from Texas Instruments is a fixed-threshold voltage supervisor IC with 4.00 V detection, 25 ms reset delay, and push-pull RESET output in a 5-pin SC-70 (DCK) package. It monitors VDD supply lines for microcontrollers and DSPs, asserting RESET during brownout or power-up until VDD stabilizes above threshold - used in portable battery-powered systems requiring precise low-voltage supervision.

For engineers reviewing the TPS3801T50DCKR datasheet, TPS3801T50DCKR pinout, TPS3801T50DCKR application, or TPS3801T50DCKR equivalent, key selection criteria include its 4.00 V ±2% threshold accuracy, 25 ms factory-programmed delay, SC-70 footprint compatibility, and absence of manual reset input (MR not present on this variant).

Technical Context

The TPS3801T50DCKR uses an internal precision reference (1.14 V) and resistor divider to set a fixed 4.00 V detection threshold with 2% typical accuracy over –40°C to +85°C. Its reset logic asserts a push-pull RESET signal when VDD falls below VIT– (3.92–4.08 V), holding it active for 15–35 ms after VDD recovers above threshold.

This variant belongs to the TPS3801-xx subfamily and lacks MR input - unlike TPS3800/TPS3802 variants - simplifying circuit design where manual reset is unnecessary. It draws only 7–10 mA supply current across 1.6–6 V VDD range and features <25 nA SENSE input bias current, enabling high-impedance monitoring without loading source rails.

Key Specifications

Pinout & Package

TPS3801T50DCKR is housed in a 5-pin SC-70 (DCK) package with 0.65 mm lead pitch, 1.1 mm max height, and Q3 pin-1 orientation per tape-and-reel standard. The package supports reflow soldering per JEDEC Level-1-260°C-UNLIM.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3801I50DCKR and TPS3800G27DCKR, the TPS3801T50DCKR offers the unique combination of 4.00 V threshold and short 25 ms delay - critical for fast-booting embedded controllers where longer delays cause missed wake-up windows or watchdog timeouts.

Availability

TPS3801T50DCKR is available at Aetrix Electronics and suitable for battery-powered IoT nodes, industrial PLC I/O modules, automotive infotainment head units, and medical portable monitors requiring stable component supply across extended production lifecycles.

Supply support for TPS3801T50DCKR 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 low-power, space-constrained applications requiring precise supply voltage monitoring and deterministic reset timing - targeting DSPs, microcontrollers, and portable electronics.

FAQ

What is the exact reset threshold voltage of the TPS3801T50DCKR?

The TPS3801T50DCKR has a factory-trimmed supply voltage detection threshold of 4.00 V, with a guaranteed range of 3.92 V to 4.08 V (±2%) over –40°C to +85°C. This value is fixed and non-adjustable, referenced to the internal 1.14 V bandgap and resistor divider network - no external components affect the trip point.

Does the TPS3801T50DCKR include a manual reset (MR) input?

No, the TPS3801T50DCKR does not include a manual reset (MR) input. Unlike other members of the TPS380x family such as TPS3800 or TPS3802 variants, this specific part omits MR functionality. Pin 2 is GND, and Pin 5 is NC - confirming no MR capability is implemented in the TPS3801T50DCKR die configuration.

What is the reset delay time for the TPS3801T50DCKR, and is it adjustable?

The TPS3801T50DCKR features a factory-programmed reset recovery delay time of 25 ms (typical), with a guaranteed range of 15–35 ms. This delay is fixed and non-adjustable - no external capacitor or resistor can modify it. The timing begins when VDD rises above the 4.00 V threshold and ends when RESET deasserts.

What package type and dimensions does the TPS3801T50DCKR use?

The TPS3801T50DCKR uses the SC-70 (DCK) package: 5-pin, 2.15 mm × 1.4 mm body size, 0.65 mm lead pitch, and maximum height of 1.1 mm. Its pin-1 orientation follows Q3 quadrant per JEDEC tape-and-reel standards, and it is rated for moisture sensitivity level 1 (260°C peak reflow).

Can the TPS3801T50DCKR monitor a 3.3 V supply rail?

No - the TPS3801T50DCKR is optimized for 4.00 V detection and is not suitable for monitoring 3.3 V rails. Attempting to use it on a 3.3 V supply would result in permanent RESET assertion since VDD never reaches the 3.92 V minimum threshold. For 3.3 V supervision, consider TPS3801K33DCKR (2.93 V) or TPS3801L30DCKR (2.64 V) instead.