Analog Devices Inc./Maxim Integrated MAX6380XR46+

Overview

MAX6380XR46+ from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector designed for precision power-supply monitoring in battery-powered systems. It features a factory-trimmed 4.63V threshold (±2.5% over temperature), 500nA supply current, and operates down to 1V VCC. It asserts OUT low when VCC falls below threshold and is used in portable equipment power sequencing and Li+-battery backup supervision.

For engineers reviewing the MAX6380XR46+ datasheet, MAX6380XR46+ pinout, MAX6380XR46+ application, or MAX6380XR46+ equivalent, key selection criteria include reset threshold accuracy, ultra-low quiescent current, open-drain output compatibility with mixed-voltage logic, transient immunity, and SC70-3 space-constrained packaging.

Technical Context

The MAX6380XR46+ implements a precision bandgap reference and comparator with internally trimmed resistors to set its 4.63V trip point. Its open-drain output requires an external pull-up and sinks up to 100µA while asserted, enabling flexible interface to 1.8V–5.5V logic domains.

It ignores fast negative-going VCC transients up to ~200µs (at 30mV overdrive), ensuring glitch immunity in noisy power rails. The device guarantees correct output state for VCC ≥1V and exhibits ±2.5% threshold accuracy across –40°C to +85°C.

Key Specifications

Pinout & Package

MAX6380XR46+ is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), 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 detector applications.

Compared with TLV803EB33DBVR and APX803S-46SA-7, the MAX6380XR46+ delivers exact 4.63V detection with industry-leading 500nA current and guaranteed SC70-3 form factor-critical for space-constrained, long-life battery systems requiring precise 5V rail supervision.

Availability

MAX6380XR46+ is available at Aetrix Electronics and suitable for portable medical devices, battery-backed real-time clocks, industrial edge controllers, and IoT sensor nodes requiring stable component supply and long-term lifecycle support.

Supply support for MAX6380XR46+ 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 family was engineered specifically for ultra-low-power voltage monitoring in space- and energy-constrained systems, emphasizing threshold accuracy, minimal quiescent current, and robust transient immunity.

FAQ

What is the exact reset threshold voltage of the MAX6380XR46+ and how stable is it over temperature?

The MAX6380XR46+ has a factory-trimmed nominal reset threshold of 4.63V, with guaranteed accuracy of ±2.5% over the full industrial temperature range (–40°C to +85°C). Its temperature coefficient is 40ppm/°C, meaning threshold drift is limited to approximately ±11.6mV across the entire range - critical for reliable brown-out detection in thermally varying environments. This specification is confirmed in the Electrical Characteristics table of the MAX6380XR46+ datasheet.

Does the MAX6380XR46+ require any external components to function?

No, the MAX6380XR46+ requires no external resistors, capacitors, or trimming components. Its 4.63V threshold is set by internal laser-trimmed resistors, and its precision bandgap reference and comparator are fully integrated. Only an external pull-up resistor on the open-drain OUT pin is needed to interface with downstream logic - a standard, non-critical component not affecting core functionality of the MAX6380XR46+.

What is the minimum supply voltage at which the MAX6380XR46+ guarantees correct output state?

The MAX6380XR46+ guarantees correct output logic state (i.e., OUT remains asserted low when VCC < 4.63V, and releases high impedance when VCC > 4.63V) down to VCC = 1.0V. This is explicitly specified in the device's Absolute Maximum Ratings and Electrical Characteristics tables, enabling reliable operation during deep brown-out conditions where other supervisors may fail - a key design advantage of the MAX6380XR46+.

How does the MAX6380XR46+ handle fast transients on the VCC line?

The MAX6380XR46+ incorporates built-in transient immunity: it ignores negative-going VCC glitches shorter than ~200µs (depending on overdrive magnitude), as shown in the "Maximum Transient Duration vs. Threshold Overdrive" graph in the datasheet. This prevents false resets caused by switching noise from DC/DC converters or load transients - a verified behavior intrinsic to the MAX6380XR46+ architecture, not dependent on external filtering.

Is the MAX6380XR46+ available in lead-free packaging and what is its package footprint?

Yes, the MAX6380XR46+ is supplied in lead-free packaging (RoHS-compliant), indicated by the "+" suffix per Maxim's ordering convention. It uses the SC70-3 package (2.0mm × 2.1mm × 0.95mm), significantly smaller than SOT23-3, making it ideal for ultra-compact PCBs. The pinout is standardized: Pin 1 = GND, Pin 2 = OUT, Pin 3 = VCC - identical across all MAX6375–MAX6380 SC70 variants including the MAX6380XR46+.