Analog Devices Inc./Maxim Integrated MAX6380XR42

Overview

MAX6380XR42 from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector optimized for battery and power-supply monitoring in portable systems. It features a factory-trimmed 4.200V threshold (±2.5% over temperature), 500nA supply current at +25°C, and guaranteed operation down to VCC = 1V. Its SC70-3 package enables compact integration in space-constrained battery-powered equipment.

For engineers reviewing the MAX6380XR42 datasheet, MAX6380XR42 pinout, MAX6380XR42 application, or MAX6380XR42 equivalent, this device serves as a precision reset supervisor for Li-ion battery packs, low-voltage microcontroller power rails, and DC/DC converter enable sequencing where minimal quiescent current and transient immunity are critical.

Technical Context

The MAX6380XR42 implements a precision bandgap reference and comparator with internally trimmed resistors to set its 4.200V trip point. It asserts an active-low, open-drain output when VCC falls below VTH, requiring an external pull-up for logic-level compatibility across voltage domains up to 5.5V.

Designed for immunity to fast negative-going VCC transients, it tolerates glitches up to ~120µs at 20mV overdrive and guarantees correct output state down to 1V supply. Propagation delay is 9.5µs (typ) for falling edge under full temperature range (-40°C to +85°C).

Key Specifications

Pinout & Package

MAX6380XR42 is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for high-density PCB layouts in portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB29DBZR and TPS3808G33DBVR, MAX6380XR42 delivers exact 4.200V trip accuracy with lowest ICC (500nA) and open-drain output-critical for battery voltage lockout and multi-rail interface in ultra-low-power portable designs.

Availability

MAX6380XR42 is available at Aetrix Electronics and suitable for precision battery monitoring, microcontroller power-rail supervision, and DC/DC converter enable sequencing requiring stable component supply and long-term production continuity.

Supply support for MAX6380XR42 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

Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for power management, sensing, and interface applications in industrial, automotive, and portable markets.

The MAX6375–MAX6380 family was engineered specifically for ultra-low-power voltage monitoring in battery-critical systems-delivering factory-trimmed thresholds, sub-µA supply current, and robust transient rejection in miniature SC70/SOT23 packages.

FAQ

What is the exact reset threshold voltage of MAX6380XR42?

The MAX6380XR42 has a factory-trimmed nominal reset threshold of 4.200V, with guaranteed accuracy of ±2.5% over the full operating temperature range (-40°C to +85°C). This value is confirmed in Table 1 of the datasheet under suffix "R42", and applies specifically to the MAX6380XR42 variant-not other members of the MAX6375–MAX6380 family.

Does MAX6380XR42 require an external pull-up resistor on its OUT pin?

Yes, MAX6380XR42 features an active-low, open-drain output and requires an external pull-up resistor to a logic-compatible voltage rail (up to 5.5V). The datasheet specifies that the pull-up must be sized to ensure VOL ≤ 0.4V at ISINK = 100µA, and compatible with all connected input leakage paths-no internal pull-up is integrated in MAX6380XR42.

What is the minimum VCC voltage at which MAX6380XR42 remains functional?

MAX6380XR42 is guaranteed to maintain correct output logic state down to VCC = 1V, per the Absolute Maximum Ratings and Electrical Characteristics tables. This enables reliable operation during deep battery discharge, even as the monitored Li-ion cell voltage drops below 2.5V-critical for graceful system shutdown in portable devices.

How does MAX6380XR42 handle short voltage transients on the VCC line?

MAX6380XR42 is designed to ignore fast negative-going VCC transients. The Typical Operating Characteristics graph "Maximum Transient Duration vs. Threshold Overdrive" shows it rejects glitches up to ~120µs at 20mV overdrive. This immunity prevents false resets caused by switching noise or load transients-verified across -40°C to +85°C.

Is MAX6380XR42 available in both leaded and lead-free packaging?

Yes, MAX6380XR42 is offered in both leaded and lead-free versions. To specify lead-free packaging, replace the "-T" suffix with "+T" in the order code (e.g., MAX6380XR42+T). Both variants use the same SC70-3 package outline and share identical electrical specifications and thermal performance.