Analog Devices Inc./Maxim Integrated MAX6376XR31+T

Overview

MAX6376XR31+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 3.08V threshold (±2.5% over temperature), 500nA supply current at +25°C, and guaranteed operation down to VCC = 1V. Its role is to assert a logic-high output when VCC falls below the trip point, enabling reset or load-switch control in Li+-powered wearables and sensor nodes.

For engineers reviewing the MAX6376XR31+T datasheet, MAX6376XR31+T pinout, MAX6376XR31+T application, or MAX6376XR31+T equivalent, key selection criteria include its 3.08V detection accuracy, SC70-3 package footprint, active-high push-pull output drive capability (VOH ≥ 0.8×VCC at 500µA), and immunity to sub-200µs VCC transients - critical for reliable brownout response in energy-constrained edge devices.

Technical Context

The MAX6376XR31+T implements a precision bandgap reference and comparator with internally trimmed resistors to set its 3.08V threshold without external components. Its active-high push-pull output drives high (VOH ≥ 0.8×VCC) when VCC drops below VTH and low (VOL ≤ 0.4V at 1.2mA) otherwise, eliminating need for external pull-ups.

Designed for robustness in noisy environments, it ignores fast negative-going VCC transients up to 200µs (at 100mV overdrive) and maintains ±2.5% threshold accuracy across –40°C to +85°C. Propagation delay is 6.3µs (typical) for falling-edge detection, with hysteresis of 100mV to prevent chatter near threshold.

Key Specifications

Pinout & Package

MAX6376XR31+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for space-constrained PCB layouts in wearable and medical devices.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB30DBZR and TPS3801K30DBVR, the MAX6376XR31+T uniquely balances ultra-low 500nA current, SC70-3 footprint, ±2.5% over temperature accuracy, and active-high push-pull output - making it optimal for size- and energy-constrained designs where 3.08V detection precision and direct MCU interface are required.

Availability

MAX6376XR31+T is available at Aetrix Electronics and suitable for precision battery monitoring, portable medical devices, and industrial sensor nodes requiring stable component supply and long-lifecycle support.

Supply support for MAX6376XR31+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The MAX6375–MAX6380 family was designed specifically for ultra-low-power voltage supervision in battery-critical applications - delivering precision thresholds, nanoscale current draw, and robust transient rejection in minimal SC70/SOT23 footprints.

FAQ

What is the exact reset threshold voltage of the MAX6376XR31+T?

The MAX6376XR31+T has a factory-trimmed nominal reset threshold of 3.08V, with guaranteed accuracy of ±2.5% over the full operating temperature range of –40°C to +85°C. This value is confirmed in Table 1 of the datasheet under suffix "R31", and applies specifically to the MAX6376 variant with active-high push-pull output. The MAX6376XR31+T does not require external calibration to achieve this specification.

Does the MAX6376XR31+T require an external pull-up resistor on its output?

No, the MAX6376XR31+T features an active-high push-pull output stage, meaning it actively drives both high and low logic states without needing an external pull-up resistor. When VCC falls below 3.08V, OUT is driven high (VOH ≥ 0.8×VCC at 500µA); when VCC is above threshold, OUT is driven low (VOL ≤ 0.4V at 1.2mA). This simplifies interface design with MCUs and eliminates one passive component.

What package type and dimensions does the MAX6376XR31+T use?

The MAX6376XR31+T uses the SC70-3 package: a 3-pin surface-mount outline measuring 2.0mm × 2.1mm × 0.95mm (body), with gull-wing leads and lead-free finish indicated by the "+T" suffix. Pin 1 is GND, Pin 2 is OUT, and Pin 3 is VCC - matching the top-view diagram in the MAX6375–MAX6380 datasheet Rev 3, Figure 1.

How does the MAX6376XR31+T handle short voltage transients on the VCC line?

The MAX6376XR31+T incorporates built-in transient immunity and will ignore negative-going VCC glitches up to 200µs in duration when the overdrive (VTH – VCC) is 100mV, as shown in the "Maximum Transient Duration vs. Threshold Overdrive" graph. This prevents false resets caused by switching noise, motor commutation, or RF coupling - a key reliability feature confirmed in the Typical Operating Characteristics section.

Is the MAX6376XR31+T specified to operate down to 1V supply voltage?

Yes, the MAX6376XR31+T is fully specified to maintain correct output logic state (active-high when VCC < VTH) down to VCC = 1V, as stated in the General Description and Absolute Maximum Ratings sections. This allows reliable operation during deep battery discharge, even as the monitored rail collapses - a capability verified across –40°C to +85°C and documented in the Electrical Characteristics table.