Analog Devices Inc./Maxim Integrated MAX6376UR29

Overview

MAX6376UR29 from Maxim Integrated is an ultra-low-power, active-high push-pull voltage detector designed for precision supply monitoring in battery-powered systems. It features a factory-trimmed 2.93V threshold (±2.5% over temperature), 500nA supply current, and guaranteed operation down to 1V VCC. It asserts a logic-high output when VCC falls below threshold, enabling reliable reset or power-fail signaling in portable medical devices and wearables.

For engineers reviewing the MAX6376UR29 datasheet, MAX6376UR29 pinout, MAX6376UR29 application, or MAX6376UR29 equivalent, key selection criteria include its active-high push-pull output configuration, 2.93V trip point, SC70/SOT23-3 package compatibility, transient immunity up to 100µs at 20mV overdrive, and guaranteed output state down to 1V supply.

Technical Context

The MAX6376UR29 integrates a precision bandgap reference, comparator, and laser-trimmed resistive divider to deliver fixed 2.93V detection without external components. Its internal architecture ensures stable threshold accuracy across -40°C to +85°C with ±2.5% tolerance and 40ppm/°C tempco.

It employs propagation delay filtering to reject fast VCC transients-capable of ignoring negative glitches ≤100µs wide when VCC dips 20mV below VTH. The push-pull output drives high (VOH ≥0.8×VCC at 500µA) and low (VOL ≤0.4V at 1.2mA) without requiring external pull-up resistors.

Key Specifications

Pinout & Package

MAX6376UR29 is packaged in a 3-pin SOT23-3 (also available in SC70-3), with identical pinout: Pin 1 = GND, Pin 2 = OUT, Pin 3 = VCC. The compact 2.92mm × 1.3mm footprint supports high-density PCB layouts in space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB29DPWR and TPS3808G33DBVR, MAX6376UR29 uniquely combines 2.93V precision, active-high push-pull output, and 500nA current in a 3-pin SOT23-enabling direct replacement in existing 2.9V–3.0V brown-out circuits without layout or firmware changes.

Availability

MAX6376UR29 is available at Aetrix Electronics and suitable for portable medical sensors, wearable fitness trackers, industrial handheld scanners, and smart home battery backup units requiring stable component supply across long production lifecycles.

Supply support for MAX6376UR29 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 analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.

The MAX6375–MAX6380 family was designed specifically for ultra-low-power supply monitoring in battery-critical systems, delivering factory-trimmed voltage detection with minimal external components and guaranteed operation down to 1V.

FAQ

What is the exact reset threshold voltage of MAX6376UR29?

The MAX6376UR29 has a factory-trimmed nominal reset threshold of 2.93V, with ±2.5% accuracy over the full -40°C to +85°C temperature range. This value is laser-trimmed during production and specified in Table 1 of the datasheet under suffix "R29". The actual threshold remains stable across voltage and temperature due to integrated bandgap reference and low tempco design.

Does MAX6376UR29 require external components to operate?

No, MAX6376UR29 operates as a fully self-contained voltage detector with no external components required. Its precision bandgap reference, comparator, and trimmed resistor network are integrated on-die. Only a 0.1µF ceramic decoupling capacitor on VCC is recommended for noise immunity-no resistors, capacitors, or trimming adjustments are needed for basic reset functionality.

What is the output configuration of MAX6376UR29 and how does it interface with a microcontroller?

MAX6376UR29 features an active-high push-pull output. When VCC falls below 2.93V, OUT drives logic-high (VOH ≥0.8×VCC at 500µA); otherwise, it drives logic-low (VOL ≤0.4V at 1.2mA). This allows direct connection to standard CMOS reset inputs (e.g., nRESET pins) without pull-up resistors or level shifters-simplifying interface and reducing BOM count.

How does MAX6376UR29 handle power supply transients?

MAX6376UR29 incorporates built-in transient immunity: it ignores negative-going VCC glitches ≤100µs wide when the overdrive (VTH – VCC) is 20mV, per the Maximum Transient Duration vs. Threshold Overdrive graph. This prevents false resets during switching noise or load-step events, ensuring robust operation in electrically noisy environments like motor-driven handheld tools.

What package options are available for MAX6376UR29 and are they interchangeable?

MAX6376UR29 is offered in both 3-pin SOT23-3 (top mark FZHK) and 3-pin SC70-3 (top mark ADA) packages. Both share identical pinout (GND/OUT/VCC), electrical specs, and thermal performance. They are footprint-compatible for manual rework but differ in size: SOT23-3 measures 2.92mm × 1.3mm, SC70-3 is smaller at 2.0mm × 1.25mm-allowing layout flexibility based on board density requirements.