Analog Devices Inc./Maxim Integrated MAX6376UR23+T

Overview

MAX6376UR23+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 2.32V threshold (±2.5% over temperature), 500nA supply current at +25°C, and guaranteed operation down to 1V VCC - enabling reliable brownout detection in Li+-based and low-voltage microcontroller power domains.

For engineers reviewing the MAX6376UR23+T datasheet, MAX6376UR23+T pinout, MAX6376UR23+T application, or MAX6376UR23+T equivalent, key selection criteria include its active-high output logic, SC70/SOT23-3 package compatibility, 20µs propagation delay (falling edge), ±2.5% threshold accuracy, and immunity to sub-100µs VCC transients - all critical for low-power reset supervision in space-constrained embedded designs.

Technical Context

The MAX6376UR23+T implements a precision bandgap reference and comparator with internally trimmed resistors to set its 2.32V trip point, eliminating external calibration components. Its push-pull output drives high when VCC falls below threshold, requiring no external pull-up resistor.

Designed for single-function reset supervision, it ignores fast VCC transients (<100µs at 100mV overdrive) and maintains valid logic state down to 1V supply - ensuring deterministic behavior during deep brownout conditions common in battery discharge profiles.

Key Specifications

Pinout & Package

MAX6376UR23+T is housed in a 3-pin SOT23-3 package (JEDEC MO-178AA), footprint-compatible with SC70-3 but with higher power dissipation rating (320mW at +70°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB23DBZR and TPS3808G12QDBVRQ1, the MAX6376UR23+T delivers optimal balance of ultra-low ICC, fixed 2.32V accuracy, active-high push-pull drive, and minimal footprint - making it the preferred choice for cost-sensitive, space-constrained portable electronics where reset timing determinism and zero-external-component simplicity are mandatory.

Availability

MAX6376UR23+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, wearable fitness trackers, and smart meter battery backup systems requiring stable component supply and long-term manufacturability.

Supply support for MAX6376UR23+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, communications, and consumer applications.

The MAX6375–MAX6380 family was designed specifically for ultra-low-power voltage monitoring in battery-critical systems - delivering precision reset supervision with no external components in sub-1mm² packages.

FAQ

What is the exact reset threshold voltage of the MAX6376UR23+T and how tightly is it specified?

The MAX6376UR23+T has a factory-trimmed nominal reset threshold of 2.32V, with guaranteed accuracy of ±2.5% over the full industrial temperature range (-40°C to +85°C). This means the actual trip point falls between 2.262V and 2.375V at temperature extremes, and tighter tolerance (±1.5%) applies at +25°C. The value is laser-trimmed during production and requires no external adjustment - a key feature confirmed in the device's Electrical Characteristics table and Selector Guide.

Does the MAX6376UR23+T require any external components to operate correctly?

No, the MAX6376UR23+T requires zero external components. Its precision bandgap reference, comparator, and threshold-setting resistors are fully integrated and factory-trimmed. Unlike open-drain detectors, its active-high push-pull output eliminates the need for a pull-up resistor. This integration reduces PCB area, improves reliability, and simplifies layout - a core design objective explicitly stated in the General Description and Features sections of the datasheet.

What is the minimum supply voltage at which the MAX6376UR23+T guarantees correct output logic state?

The MAX6376UR23+T guarantees correct output logic state (i.e., high when VCC < VTH, low when VCC ≥ VTH) down to 1V VCC. This is explicitly stated in the General Description ("All parts are guaranteed to be in the correct output logic state for VCC down to 1V") and verified in the Absolute Maximum Ratings and Electrical Characteristics tables. This capability ensures deterministic reset behavior even during deep battery discharge or low-VCC MCU operation.

How does the MAX6376UR23+T handle short voltage transients on the VCC line?

The MAX6376UR23+T is designed to ignore fast negative-going VCC transients - specifically, those shorter than ~100µs when the overdrive (VTH − VCC) is 100mV. This transient immunity is quantified in the Typical Operating Characteristics graph "Maximum Transient Duration vs. Threshold Overdrive" and referenced in the Applications Information section. It prevents false resets caused by switching noise or load dumps, a critical requirement for robust operation in electrically noisy portable systems.

Is the MAX6376UR23+T compatible with both SC70-3 and SOT23-3 footprints?

The MAX6376UR23+T is specified for the SOT23-3 package only (as indicated by the "UR" suffix in the ordering code and confirmed in the Ordering Information table). While electrically identical to SC70-3 variants (e.g., MAX6376XR23+T), the UR version uses the larger SOT23-3 outline (JEDEC MO-178AA) with higher power dissipation (320mW vs. 174mW). Footprint compatibility is not guaranteed - pad dimensions, pitch, and thermal pad presence differ, so direct substitution requires PCB layout verification.