Analog Devices Inc./Maxim Integrated MAX6378XR38-T

Overview

MAX6378XR38-T from Maxim Integrated is an ultra-low-power, active-low voltage detector in SC70-3 package, with factory-trimmed 3.800V threshold (±2.5% over temperature), 500nA supply current, and push-pull output. It monitors VCC in battery-powered systems and asserts OUT low when supply drops below threshold-used for precision brownout detection in portable medical devices and IoT edge sensors.

For engineers reviewing the MAX6378XR38-T datasheet, MAX6378XR38-T pinout, MAX6378XR38-T application, or MAX6378XR38-T equivalent, key selection factors include its 3.8V trip point, SC70-3 footprint compatibility, immunity to sub-10µs VCC transients, and guaranteed correct logic state down to 1V VCC.

Technical Context

The MAX6378XR38-T implements a precision bandgap reference and comparator with internally trimmed resistors to set its 3.800V threshold. Its push-pull output drives logic directly without external pull-up, and it operates across -40°C to +85°C with ±2.5% threshold accuracy.

Designed for single-function voltage monitoring, it ignores fast VCC transients (e.g., <10µs glitches at 3.7V overdrive) and maintains valid output states even as VCC declines to 1V-enabling reliable reset assertion during deep battery discharge.

Key Specifications

Pinout & Package

MAX6378XR38-T is housed in a 3-pin SC70-3 package (2.0mm × 1.25mm × 0.95mm), optimized for space-constrained portable designs. Pin 1 = GND, Pin 2 = OUT, Pin 3 = VCC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3123QDBVRQ1 and APX803S-38SA-7, the MAX6378XR38-T delivers superior energy efficiency (500nA vs. >1µA) and guaranteed functionality down to 1V VCC-critical for long-life portable devices where every nanoamp extends operational lifetime.

Availability

MAX6378XR38-T is available at Aetrix Electronics and suitable for precision battery monitoring, load switching/power sequencing, and power-supply monitoring in digital/analog systems requiring stable component supply and long-term production continuity.

Supply support for MAX6378XR38-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, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.

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

FAQ

What is the exact reset threshold voltage of MAX6378XR38-T?

The MAX6378XR38-T has a factory-trimmed nominal reset threshold of 3.800V, with ±2.5% accuracy over the full -40°C to +85°C operating temperature range. This value is confirmed in Table 1 of the datasheet under suffix "R38", and applies specifically to the MAX6378 variant group with thresholds between 3.30V and 4.63V.

Does MAX6378XR38-T require external components for basic operation?

No, the MAX6378XR38-T requires no external components for standard voltage detection. Its precision bandgap reference, comparator, and threshold-setting resistors are fully integrated and factory-trimmed. Only a 0.1µF VCC bypass capacitor is recommended for noise immunity-no resistor dividers, calibration parts, or pull-ups are needed.

What is the output configuration of MAX6378XR38-T and how does it interface with a microcontroller?

The MAX6378XR38-T features an active-low push-pull output (OUT). When VCC falls below 3.800V, OUT drives logic low (≤0.4V at 1.6mA sink); when VCC is above threshold, OUT drives high (≥0.8×VCC). This allows direct connection to standard microcontroller RESET# inputs without external pull-up resistors.

Can MAX6378XR38-T operate reliably at very low supply voltages?

Yes, the MAX6378XR38-T is guaranteed to maintain correct output logic state for VCC down to 1.0V. This capability ensures robust reset assertion during deep battery discharge or brownout conditions-unlike many competitors that fail below 1.8V-and is explicitly verified in the Absolute Maximum Ratings and Electrical Characteristics tables.

What package type and footprint does MAX6378XR38-T use?

The MAX6378XR38-T uses the SC70-3 package (2.0mm × 1.25mm × 0.95mm), with pin 1 = GND, pin 2 = OUT, and pin 3 = VCC. Its footprint matches industry-standard 3-pin voltage detectors and is compatible with automated SMT assembly processes used for high-volume portable electronics manufacturing.