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 at +25°C, and guaranteed operation down to VCC = 1V. It asserts a logic-high output when VCC falls below threshold and is used in portable equipment power sequencing and Li+-battery voltage supervision.

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 suitability for low-quiescent-current reset generation in space-constrained embedded designs.

Technical Context

The MAX6376UR29+ implements a precision bandgap reference and comparator with internally trimmed resistors to set its 2.93V detection threshold. 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 sink) otherwise, eliminating external pull-up components.

It achieves ±2.5% threshold accuracy across –40°C to +85°C and exhibits built-in immunity to fast VCC transients-rejecting negative glitches up to 100µs wide when overdriven by 20mV. Propagation delay is 6.3µs (typ) for falling edge and 9.5µs (typ) for rising edge under full temperature range.

Key Specifications

Pinout & Package

MAX6376UR29+ is packaged in a lead-free 3-pin SOT23-3 (same footprint as SC70-3), with 1.3mm × 2.9mm body and 0.95mm pitch. 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 supervisor applications.

Compared with TLV803R29DBVR and TPS3808G33DBVR, the MAX6376UR29+ uniquely combines 2.93V precision, active-high push-pull output, and 500nA supply current in a standard 3-pin SOT23-3 footprint-enabling drop-in replacement in existing 2.9V–3.0V battery-monitoring layouts without layout changes or added passives.

Availability

MAX6376UR29+ is available at Aetrix Electronics and suitable for portable medical sensors, wearable fitness trackers, industrial IoT edge nodes, and smart meter battery backup systems requiring stable component supply, long-term lifecycle support, and lead-free compliance.

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 high-performance analog, mixed-signal, and power management ICs for industrial, automotive, communications, and consumer applications.

The MAX6375–MAX6380 family was designed specifically for ultra-low-power voltage supervision in battery-critical applications-delivering precision thresholds, nanoscale quiescent current, and robust transient immunity in miniature 3-pin packages.

FAQ

What is the exact reset threshold voltage of the MAX6376UR29+?

The MAX6376UR29+ has a factory-trimmed nominal reset threshold of 2.93V, with guaranteed accuracy of ±2.5% over the full operating temperature range of –40°C to +85°C. This value is laser-trimmed during production and does not require external calibration. The "R29" suffix in MAX6376UR29+ explicitly denotes the 2.93V variant per Maxim's Selector Guide.

Does the MAX6376UR29+ require an external pull-up resistor on its output?

No, the MAX6376UR29+ features an active-high push-pull output that actively drives both high and low states. When VCC falls below 2.93V, it sources up to 500µA to drive OUT high; when VCC is above threshold, it sinks up to 1.2mA to drive OUT low. This eliminates the need for an external pull-up resistor, reducing BOM count and board area.

Can the MAX6376UR29+ operate reliably at VCC = 1.2V?

Yes, the MAX6376UR29+ is fully specified to operate and assert correct output logic down to VCC = 1.2V, and its output remains valid even as low as VCC = 1.0V. This capability ensures reliable reset generation during deep battery discharge in single-cell Li+ or alkaline systems where voltage may fall below 2.0V before cutoff.

What is the maximum transient duration the MAX6376UR29+ can ignore at 20mV overdrive?

At a 20mV overdrive (i.e., VCC = VTH – 20mV = 2.91V), the MAX6376UR29+ rejects negative-going transients up to 100µs in duration, as confirmed by the "Maximum Transient Duration vs. Threshold Overdrive" graph in the datasheet. This immunity prevents false resets caused by switching noise, ESD coupling, or load-step artifacts.

Is the MAX6376UR29+ pin-compatible with other devices in the MAX6375–MAX6380 family?

Yes, all MAX6375–MAX6380 variants-including MAX6376UR29+-share identical 3-pin SOT23-3 and SC70-3 footprints and pinouts (GND, OUT, VCC). However, output logic polarity differs: MAX6376/MAX6379 are active-high push-pull, while MAX6375/MAX6378 are active-low push-pull and MAX6377/MAX6380 are active-low open-drain. Swapping requires verifying output compatibility with the host system.