Texas Instruments TPS3802K33DCKR

Overview

TPS3802K33DCKR from Texas Instruments is a fixed-threshold voltage supervisor IC with 2.93 V detection, 380 ms reset delay, push-pull RESET output, manual reset (MR) input, and SC-70 (DCK) 5-pin package. It monitors VDD supply rails in microcontroller-based systems to ensure reliable power-on initialization and brownout recovery.

For engineers reviewing the TPS3802K33DCKR datasheet, TPS3802K33DCKR pinout, TPS3802K33DCKR application, or TPS3802K33DCKR equivalent, this page delivers verified electrical parameters, thermal operating range, timing behavior, package dimensions, and real-world use cases for embedded power sequencing and DSP reset management.

Technical Context

The TPS3802K33DCKR uses an internal precision reference (1.14 V) and resistor divider to achieve ±2.5% threshold accuracy at 2.93 V over –40°C to +85°C. Its reset logic asserts a low-active push-pull RESET signal when VDD falls below threshold and holds it for 380 ms after VDD recovers above threshold.

A dedicated MR input enables external system-level reset initiation; a low pulse on MR forces RESET active regardless of VDD state. The device draws only 13–18 mA supply current across 1.6–6 V VDD, with input bias current <25 nA on SENSE/VDD pins and negligible loading on monitored rails.

Key Specifications

Pinout & Package

TPS3802K33DCKR is housed in a 5-pin SC-70 (DCK) package - 2.0 mm × 1.25 mm footprint, 1.1 mm max height, JEDEC MO-203 compliant - optimized for space-constrained PCB layouts in portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3802K33DCKR, TPS3802L30DCKR shifts detection downward for compatibility with sub-3 V logic, while TPS3801K33DCKR shortens delay for latency-sensitive designs-both retain pin compatibility and require no layout changes.

Availability

TPS3802K33DCKR is available at Aetrix Electronics and suitable for industrial automation, medical instrumentation, and automotive body electronics requiring stable component supply across long product lifecycles.

Supply support for TPS3802K33DCKR 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 connectivity technologies, with decades of expertise in power management and system supervision ICs.

The TPS380x family was designed specifically for robust, ultra-small-footprint voltage monitoring in DSP, microcontroller, and microprocessor systems where board space and power efficiency are critical constraints.

FAQ

What is the exact reset threshold voltage of the TPS3802K33DCKR?

The TPS3802K33DCKR has a factory-trimmed reset threshold of 2.93 V, with guaranteed tolerance of ±2.5% over –40°C to +85°C. This value is specified in the Electrical Characteristics table under "Negative-going input threshold voltage" for TPS380xK33 devices and confirmed in the Available Options table where TPS3802K33DCKR is explicitly listed with 2.93 V.

Does the TPS3802K33DCKR include a manual reset (MR) input?

Yes, the TPS3802K33DCKR includes a dedicated MR (manual reset) input on Pin 3. As stated in the FEATURES section and FUNCTION/TRUTH TABLE, all TPS380x devices except TPS3801-01 incorporate MR. A low-level pulse on MR forces the RESET output active regardless of VDD level, enabling system-level reset initiation.

What is the reset delay time for the TPS3802K33DCKR, and is it adjustable?

The TPS3802K33DCKR features a fixed 380 ms reset delay time, as documented in both the FEATURES list ("TPS3802 = 400 ms" approximated to 380 ms typical in Electrical Characteristics) and the AVAILABLE OPTIONS table. This delay is factory-programmed and non-adjustable - unlike adjustable-delay supervisors, no external capacitor or resistor modifies the timing.

Which package type and pin count does the TPS3802K33DCKR use?

The TPS3802K33DCKR uses the SC-70 (DCK) package - a 5-pin surface-mount outline measuring 2.0 mm × 1.25 mm with 1.1 mm maximum height. This is confirmed in the PACKAGE OPTION ADDENDUM, Package Outline drawing, and all top-view diagrams labeled "DCK PACKAGE (TOP VIEW)" showing five pins numbered 1–5.

Can the TPS3802K33DCKR monitor a separate SENSE voltage, or only VDD?

The TPS3802K33DCKR monitors VDD directly - it is a fixed-threshold device in the TPS3802-xx series, not the adjustable SENSE-based TPS3801-xx series. The datasheet distinguishes TPS3800/01/02 families by monitoring method: TPS3802-xx uses VDD as both supply and sense input, while TPS3801-xx variants (e.g., TPS3801-01) feature a dedicated SENSE pin.