Analog Devices Inc./Maxim Integrated MAX6379XR46+T

Overview

MAX6379XR46+T from Maxim Integrated is an ultra-low-power, active-high push-pull voltage detector optimized for battery and power-supply monitoring in portable systems. It features a factory-trimmed 4.63V threshold (±2.5% over temperature), 500nA supply current, and guaranteed operation down to 1V VCC. Its role is to assert a logic-high output when VCC falls below the trip point, enabling reliable reset or power-fail signaling in Li+-powered devices and DC/DC converter supervision.

For engineers reviewing the MAX6379XR46+T datasheet, MAX6379XR46+T pinout, MAX6379XR46+T application, or MAX6379XR46+T equivalent, key selection criteria include threshold accuracy, ultra-low quiescent current, push-pull active-high output configuration, SC70-3 package compatibility, and transient immunity for battery-backed microcontroller reset circuits.

Technical Context

The MAX6379XR46+T implements a precision bandgap reference and comparator with internally trimmed resistors to set its 4.63V detection threshold. It operates across -40°C to +85°C with ±2.5% threshold accuracy and 40ppm/°C tempco, ensuring stable trip points in varying thermal environments.

Its active-high push-pull output drives high (VOH ≥ 0.8×VCC at 500µA) when VCC drops below 4.63V and low (VOL ≤ 0.4V at 1.2mA) otherwise. Propagation delay is 9.5µs (rising) and 6.3µs (falling), with built-in immunity to transients up to 200µs at 100mV overdrive.

Key Specifications

Pinout & Package

MAX6379XR46+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), suitable for space-constrained portable PCBs. The package is lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EC46DBZR and TPS3808G33DBVR, the MAX6379XR46+T uniquely delivers 4.63V detection, active-high push-pull output, and sub-µA ICC in a 3-pin SC70 - making it optimal for compact, battery-sensitive 5V-system reset applications without design compromises.

Availability

MAX6379XR46+T is available at Aetrix Electronics and suitable for portable medical sensors, Li+-powered IoT endpoints, and industrial handheld terminals requiring stable component supply, long-term lifecycle support, and lead-free compliance.

Supply support for MAX6379XR46+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, automotive, and consumer markets.

The MAX6375–MAX6380 family was developed specifically for ultra-low-power voltage monitoring in battery-operated equipment, emphasizing minimal ICC, factory-trimmed thresholds, and robust transient rejection in miniature packages.

FAQ

What is the exact reset threshold voltage of the MAX6379XR46+T?

The MAX6379XR46+T has a factory-trimmed nominal reset threshold of 4.63V, 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 "R46", and applies specifically to the MAX6379 variant with active-high push-pull output. The MAX6379XR46+T does not require external calibration or resistor networks to achieve this threshold.

Does the MAX6379XR46+T require any external components to operate?

No, the MAX6379XR46+T operates autonomously with no external components required. Its precision bandgap reference, comparator, and threshold-setting resistors are fully integrated and factory-trimmed. Only VCC, GND, and the OUT signal connection are needed - eliminating BOM items, layout area, and calibration effort. This integration is explicitly stated in the General Description and Features sections of the MAX6379XR46+T datasheet.

What is the output configuration of the MAX6379XR46+T and how does it interface with an MCU reset pin?

The MAX6379XR46+T features an active-high push-pull output, meaning it drives OUT high when VCC falls below 4.63V and low otherwise. This configuration directly interfaces with standard CMOS reset inputs (e.g., ARM Cortex-M RESET_N pins with internal pull-down) without requiring external pull-up resistors. The output can source 500µA or sink 1.2mA, satisfying typical MCU reset input leakage and capacitance requirements per the MAX6379XR46+T Electrical Characteristics table.

What package type and dimensions does the MAX6379XR46+T use?

The MAX6379XR46+T uses the SC70-3 package: a 3-pin, surface-mount, lead-free, RoHS-compliant outline measuring 2.0mm × 2.1mm × 0.95mm. Pin 1 is GND, Pin 2 is OUT, and Pin 3 is VCC - matching the top-view diagram in the MAX6379XR46+T datasheet. This package is distinct from the SOT23-3 option (used in UR-suffixed variants) and is optimized for ultra-dense portable PCB layouts.

How does the MAX6379XR46+T handle power supply transients?

The MAX6379XR46+T incorporates inherent transient immunity: it ignores fast negative-going VCC glitches up to 200µs in duration when the overdrive (VTH – VCC) is 100mV, as shown in Figure MAX6375-04. This behavior is achieved through internal filtering and comparator hysteresis (100mV), preventing false resets during switching regulator noise or hot-plug events - a key reliability feature confirmed in the Applications Information section of the MAX6379XR46+T datasheet.