Analog Devices Inc./Maxim Integrated MAX6380XR34+

Overview

MAX6380XR34+ 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 3.40V threshold (±2.5% over temperature), 500nA supply current at +25°C, and guaranteed operation down to 1V VCC. Its role is to assert a logic-low output when VCC falls below the preset threshold, enabling system reset or power sequencing control in space-constrained applications.

For engineers reviewing the MAX6380XR34+ datasheet, MAX6380XR34+ pinout, MAX6380XR34+ application, or MAX6380XR34+ equivalent, key selection criteria include its 3.40V trip point, SC70-3 open-drain output configuration, 20µs propagation delay (falling edge), ±2.5% threshold accuracy across –40°C to +85°C, and immunity to sub-100µs VCC transients - all critical for reliable low-voltage supervision in battery-powered IoT sensors and wearables.

Technical Context

The MAX6380XR34+ implements a precision bandgap reference and comparator with internally trimmed resistors to set its 3.40V detection threshold. It operates without external components and ignores fast VCC transients via built-in hysteresis (100mV typical) and transient rejection circuitry.

This device belongs to the MAX6375–MAX6380 family of single-function voltage detectors. As an open-drain variant, it requires an external pull-up resistor and supports interfacing to logic supplies up to 5.5V. Its output remains valid down to 1V VCC, ensuring robust reset assertion during deep brownout conditions.

Key Specifications

Pinout & Package

MAX6380XR34+ is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.9mm), optimized for ultra-compact 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 TLV803EB33DBZR and APX803S-34SA-7, the MAX6380XR34+ delivers the lowest supply current (500nA vs. ≥1.2µA), making it uniquely suited for multi-year battery applications - while retaining open-drain flexibility and precise 3.40V trip point in the compact SC70-3 footprint.

Availability

MAX6380XR34+ is available at Aetrix Electronics and suitable for wearable health monitors, smart sensor nodes, industrial handheld scanners, and medical point-of-care devices requiring stable component supply and long-term manufacturability.

Supply support for MAX6380XR34+ 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, mixed-signal, and power management ICs for demanding industrial, automotive, and computing applications.

The MAX6375–MAX6380 series was developed specifically for ultra-low-power voltage supervision in battery-critical portable equipment, emphasizing minimal current draw, high threshold accuracy, and robust transient immunity in miniature packages.

FAQ

What is the exact reset threshold voltage of the MAX6380XR34+?

The MAX6380XR34+ has a factory-trimmed nominal reset threshold of 3.40V, 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 "R34", and applies specifically to the MAX6380XR34+ variant within the MAX6375–MAX6380 family.

Does the MAX6380XR34+ require an external pull-up resistor?

Yes, the MAX6380XR34+ features an active-low open-drain output (OUT), which requires an external pull-up resistor to a logic supply (up to 5.5V) to generate a valid high-level signal. The datasheet recommends selecting a resistor value that ensures VOL ≤ 0.4V at ISINK = 100µA while maintaining adequate rise time for the target load.

Can the MAX6380XR34+ operate reliably below 1.2V VCC?

No - the absolute minimum VCC for functional operation of the MAX6380XR34+ is 1.2V, as specified in the Electrical Characteristics table. Although the output state is guaranteed down to 1V, the device does not actively monitor or assert reset below 1.2V, and supply current and threshold accuracy are not characterized below that voltage.

What is the propagation delay of the MAX6380XR34+ during a falling VCC event?

The MAX6380XR34+ exhibits a typical propagation delay of 9.5µs when VCC falls through the threshold (VTH − 100mV), measured from the 50% VCC crossing to the 50% OUT transition. This value is specified for the MAX6378/MAX6379/MAX6380 subgroup and applies directly to the MAX6380XR34+.

Is the MAX6380XR34+ compatible with lead-free soldering processes?

Yes, the MAX6380XR34+ is supplied in lead-free packaging. The "+" suffix in the part number explicitly denotes RoHS-compliant, lead-free termination. It supports standard reflow profiles per JEDEC J-STD-020, including peak temperatures up to 260°C for 10 seconds, as validated in Maxim's package reliability documentation.