Analog Devices Inc./Maxim Integrated MAX6375UR29+

Overview

MAX6375UR29+ from Maxim Integrated is an ultra-low-power, active-low voltage detector IC designed for precision supply monitoring in battery-powered systems. It features a factory-trimmed 2.93V threshold (±2.5% over temperature), 500nA supply current, push-pull output, and operates down to 1V VCC. It asserts a logic-low output when VCC falls below threshold and is used in portable equipment power sequencing.

For engineers reviewing the MAX6375UR29+ datasheet, MAX6375UR29+ pinout, MAX6375UR29+ application, or MAX6375UR29+ equivalent, key selection criteria include reset threshold accuracy, ultra-low quiescent current, push-pull output drive capability, transient immunity, and SOT23-3 package compatibility with space-constrained PCB layouts.

Technical Context

The MAX6375UR29+ 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 operation across -40°C to +85°C with ±2.5% threshold accuracy and 40ppm/°C tempco.

It employs propagation delay filtering (6.3µs typical) and hysteresis (100mV) to reject fast VCC transients while maintaining deterministic reset assertion. The push-pull output drives high/low actively, eliminating need for external pull-up resistors unlike open-drain variants.

Key Specifications

Pinout & Package

MAX6375UR29+ is housed in a 3-pin SOT23-3 package (lead-free, RoHS-compliant). Pin 1 = GND, Pin 2 = OUT (active-low push-pull), Pin 3 = VCC. The compact 2.92mm × 1.6mm footprint enables high-density placement on portable PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803R29DBVR and APX803S-29SA-7, the MAX6375UR29+ uniquely balances ultra-low 500nA current, push-pull drive, and ±2.5% accuracy in SOT23-3-making it optimal for long-life, reset-critical portable designs where board space and external components must be minimized.

Availability

MAX6375UR29+ is available at Aetrix Electronics and suitable for battery-powered IoT sensor nodes, wearable health monitors, and industrial handheld meters requiring stable component supply, long-term lifecycle support, and lead-free compliance.

Supply support for MAX6375UR29+ 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, precision voltage monitoring in portable and battery-critical systems-delivering factory-trimmed thresholds, nanoscale current, and robust transient immunity in minimal footprints.

FAQ

What is the exact reset threshold voltage of the MAX6375UR29+ and how accurate is it over temperature?

The MAX6375UR29+ has a nominal reset threshold of 2.93V, with guaranteed accuracy of ±2.5% over the full -40°C to +85°C operating range. This specification is achieved via factory laser trimming of internal resistors and is documented in the Electrical Characteristics table of the MAX6375–MAX6380 datasheet. The MAX6375UR29+ maintains this accuracy without external calibration.

Does the MAX6375UR29+ require any external components to function as a voltage detector?

No, the MAX6375UR29+ requires no external components. It integrates a precision bandgap reference, comparator, and trimmed resistor network internally. The push-pull output eliminates the need for an external pull-up resistor, and the 2.93V threshold is factory-set-making the MAX6375UR29+ a true single-component solution for supply monitoring.

What is the minimum supply voltage at which the MAX6375UR29+ guarantees correct output logic state?

The MAX6375UR29+ guarantees correct output logic state (active-low when VCC < 2.93V) down to 1V VCC. This is explicitly specified in the datasheet and enables reliable reset assertion even during deep brown-out conditions before system power collapse, ensuring safe shutdown in battery-powered applications.

How does the MAX6375UR29+ handle fast voltage transients on its VCC pin?

The MAX6375UR29+ incorporates built-in transient immunity with a typical maximum glitch rejection width of 6.3µs at 100mV overdrive. Its internal comparator includes filtering that prevents false triggering from short-duration negative-going VCC spikes-a key feature confirmed in the Typical Operating Characteristics graphs and Applications Information section of the MAX6375–MAX6380 datasheet.

Is the MAX6375UR29+ pin-compatible with other devices in the MAX6375–MAX6380 family?

Yes, all MAX6375–MAX6380 devices-including the MAX6375UR29+-share identical 3-pin SOT23-3 pinouts (GND, OUT, VCC) and SC70-3 pinouts. This allows direct substitution within the same package type when changing threshold voltages or output configurations (e.g., MAX6375UR29+ to MAX6377UR29+), provided the application accepts the different output logic (push-pull vs. open-drain).