Analog Devices Inc./Maxim Integrated MAX6380XR44+T

Overview

MAX6380XR44+T from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector with a factory-trimmed 4.38V threshold, ±2.5% accuracy over temperature, 500nA supply current, and SC70-3 package - used for battery undervoltage monitoring in portable medical sensors and low-power IoT edge nodes.

For engineers reviewing the MAX6380XR44+T datasheet, MAX6380XR44+T pinout, MAX6380XR44+T application, or MAX6380XR44+T equivalent, this page delivers verified electrical parameters, real-world use context, pin-level design meaning, and validated alternative options for power-supply supervision in space-constrained, battery-critical systems.

Technical Context

The MAX6380XR44+T implements a precision bandgap reference and comparator architecture with internally trimmed resistors to set its 4.38V trip point. It asserts an active-low output when VCC falls below threshold and holds valid logic state down to 1V supply.

It features built-in immunity to fast negative-going VCC transients (≤200µs at 100mV overdrive), operates across -40°C to +85°C, and requires no external components - enabling direct integration into low-voltage, low-quiescent-current monitoring paths.

Key Specifications

Pinout & Package

MAX6380XR44+T 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 MAX6380XR44+T, TLV803EB33DBVR offers lower IQ but mismatched threshold and output logic, while APX803S-44SA-7 matches threshold closely but doubles supply current and increases thermal drift - making MAX6380XR44+T optimal for ultra-low-power, precision 4.38V brownout detection.

Availability

MAX6380XR44+T is available at Aetrix Electronics and suitable for battery-powered wearables, industrial sensor nodes, portable medical diagnostics, and smart energy meters requiring stable component supply with guaranteed long-term availability.

Supply support for MAX6380XR44+T 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, medical, and communications systems.

The MAX6375–MAX6380 family delivers ultra-low-power voltage supervision for battery-critical systems - engineered specifically to eliminate external components while maintaining ±2.5% threshold accuracy across industrial temperature ranges.

FAQ

What is the exact threshold voltage of MAX6380XR44+T and how is it trimmed?

The MAX6380XR44+T has a factory-trimmed nominal threshold voltage of 4.38V, with ±2.5% tolerance over -40°C to +85°C. This value is achieved using laser-trimmed internal resistors during wafer sort, as confirmed in Table 1 of the datasheet. The 'R44' suffix explicitly denotes the 4.38V variant within the MAX6380 series, and MAX6380XR44+T maintains this specification in its SC70-3 lead-free package.

Does MAX6380XR44+T require external components to operate?

No, MAX6380XR44+T requires no external components for basic voltage detection functionality. Its precision bandgap reference, comparator, and threshold-setting resistors are fully integrated. Only an external pull-up resistor on the open-drain OUT pin is needed to establish the logic-high level - a standard design practice for open-drain interfaces, not an external functional component.

What is the minimum VCC voltage at which MAX6380XR44+T guarantees correct output state?

MAX6380XR44+T guarantees correct output logic state (active-low when VCC < 4.38V) down to VCC = 1.0V, as stated in the General Description and Electrical Characteristics sections. This allows reliable operation even during deep battery discharge or low-voltage brownout conditions where other supervisors may fail.

How does MAX6380XR44+T handle short voltage transients on the VCC line?

MAX6380XR44+T is designed to ignore fast negative-going VCC transients: the datasheet specifies immunity to pulses ≤200µs wide when the overdrive (VTH – VCC) is 100mV. This transient rejection prevents false resets caused by switching noise or load dumps, ensuring robust operation in electrically noisy environments like motor-driven sensor nodes.

Is MAX6380XR44+T compatible with both SC70-3 and SOT23-3 footprints?

No - MAX6380XR44+T is exclusively offered in the SC70-3 package, as indicated by the 'X' in the part number (MAX6380XR44+T). The 'U' suffix (e.g., MAX6380UR44+T) denotes the SOT23-3 variant. These packages have different pinouts and dimensions: SC70-3 uses GND/OUT/VCC on pins 1/2/3 respectively, while SOT23-3 uses GND/VCC/OUT - making them physically and layout-incompatible.