Texas Instruments TPS3801I50DCKR

Overview

TPS3801I50DCKR from Texas Instruments is a fixed-threshold voltage supervisor IC with 4.55 V detection, 200 ms reset delay, push-pull RESET output, and SC-70 (DCK) 5-pin package. It monitors VDD supply voltage in microcontroller-based systems to ensure reliable power-on initialization and brownout protection during battery-powered operation.

For engineers reviewing the TPS3801I50DCKR datasheet, TPS3801I50DCKR pinout, TPS3801I50DCKR application, or TPS3801I50DCKR equivalent, this page delivers verified electrical parameters, thermal operating range, threshold accuracy, timing behavior, and real-world use context for embedded system design and BOM validation.

Technical Context

The TPS3801I50DCKR uses an internal precision reference (1.14 V) and resistor divider to set its 4.55 V ±2.5% threshold, with 60 mV hysteresis for noise immunity. Its reset logic asserts a push-pull active-low RESET signal when VDD falls below threshold and holds it for 200 ms after recovery.

No manual reset (MR) input is present-this variant excludes MR functionality per the TPS3801-01 family differentiation. It operates across –40°C to +85°C with supply current of 9–25 mA depending on VDD, and supports VDD from 2 V to 6 V.

Key Specifications

Pinout & Package

TPS3801I50DCKR 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, tape-and-reel (3000 pcs/reel), RoHS-compliant NIPDAU finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3801I50DCKR, TPS3801T50DCKR offers faster response but reduced noise margin due to narrower hysteresis (60 mV → 60 mV same, but lower absolute threshold), while TPS3802L30DCKR trades voltage range for timing robustness - neither is pin-compatible, requiring layout revision.

Availability

TPS3801I50DCKR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and portable medical monitors requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for TPS3801I50DCKR 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 over 50 years of innovation in power management and signal chain solutions.

The TPS380x family was designed specifically for reliable power-supply monitoring in DSP, microcontroller, and microprocessor systems - delivering precision threshold detection, programmable delays, and ultra-small packaging for space- and power-sensitive applications.

FAQ

What is the exact reset threshold voltage of the TPS3801I50DCKR?

The TPS3801I50DCKR has a factory-trimmed fixed threshold of 4.55 V, with guaranteed limits of 4.45 V (min) and 4.65 V (max) over –40°C to +85°C. This value is specified in the Electrical Characteristics table under "Negative-going input threshold voltage" for the TPS380xI50 variant, and reflects the voltage at which the RESET output asserts low when VDD falls.

Does the TPS3801I50DCKR include a manual reset (MR) input?

No, the TPS3801I50DCKR does not include a manual reset input. Per the datasheet's feature list and functional block diagram, MR is excluded in the TPS3801-01 subfamily - which includes TPS3801I50DCKR. Pin 3 (SENSE) is NC and must be connected to VDD; no MR functionality is implemented or supported.

What is the recommended bypass capacitor for the TPS3801I50DCKR?

A 0.1 µF ceramic capacitor is recommended between VDD and GND, placed as close as possible to the TPS3801I50DCKR pins. This is explicitly stated in the datasheet footnote for threshold stability and is critical to minimize noise coupling that could cause false resets, especially given the device's 60 mV hysteresis and high-impedance internal reference path.

Can the TPS3801I50DCKR operate from a 1.8 V supply?

No, the TPS3801I50DCKR cannot operate from 1.8 V. Its recommended operating range starts at 2 V (minimum), and the device will not assert valid RESET behavior below ~1.1 V. For 1.8 V systems, TI recommends the TPS3801E18DCKR (1.71 V threshold) or TPS3800G27DCKR (2.5 V threshold) instead.

Is the TPS3801I50DCKR pin-compatible with other TPS380x DCK-packaged variants?

Yes, all TPS380x devices in SC-70 (DCK) package share identical 5-pin pinout: Pin 1 = RESET, Pin 2 = GND, Pin 3 = SENSE (or NC), Pin 4 = VDD, Pin 5 = GND. However, functional differences exist - e.g., TPS3801I50DCKR lacks MR and uses fixed VDD monitoring, while TPS3801-01DCKR includes MR and adjustable threshold - so replacement requires schematic and firmware review.