Analog Devices Inc./Maxim Integrated MAX6375UR26

Overview

MAX6375UR26 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 2.63V threshold (±2.5% over temperature), 500nA supply current, push-pull output, and operates from 1.2V to 5.5V VCC - ideal for Li⁺-based portable equipment where reliable brownout detection is critical.

For engineers reviewing the MAX6375UR26 datasheet, MAX6375UR26 pinout, MAX6375UR26 application, or MAX6375UR26 equivalent, this device serves as a space-constrained, low-quiescent-current reset supervisor for microcontroller power sequencing, battery voltage validation, and regulated supply monitoring in industrial and consumer edge devices.

Technical Context

The MAX6375UR26 integrates a precision bandgap reference, comparator, and laser-trimmed resistive divider to deliver fixed 2.63V detection without external components. Its internal hysteresis of 0.1mV prevents chatter during slow VCC decay.

It asserts an active-low push-pull output when VCC drops below the threshold and maintains valid logic state down to 1V VCC. The device rejects transients ≤20µs at 20mV overdrive, ensuring immunity to typical power-rail noise in DC/DC converter outputs.

Key Specifications

Pinout & Package

MAX6375UR26 is housed in a 3-pin SOT23-3 package (JEDEC MO-178AA), footprint-compatible with SC70-3 but offering higher thermal dissipation (320mW at +70°C). The package is RoHS-compliant and available in tape-and-reel format only.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EC26DBZR and APX803S-26SA-7, the MAX6375UR26 uniquely balances ultra-low 500nA current, guaranteed push-pull drive, and ±2.5% threshold accuracy in a standard SOT23-3 - making it optimal for cost-sensitive, battery-constrained designs requiring direct MCU reset control without layout overhead.

Availability

MAX6375UR26 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and smart meter battery backup systems requiring stable component supply and long-lifecycle support.

Supply support for MAX6375UR26 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) designs high-performance analog and mixed-signal ICs for power, sensing, and interface applications, with emphasis on reliability and integration.

The MAX6375–MAX6380 family delivers ultra-low-power voltage supervision for battery-backed and energy-constrained systems - targeting applications where micropower operation, small size, and factory-trimmed accuracy are non-negotiable.

FAQ

What is the exact reset threshold voltage of MAX6375UR26 and how tightly is it specified?

The MAX6375UR26 has a nominal reset threshold of 2.63V, with guaranteed accuracy of ±2.5% over the full operating temperature range (-40°C to +85°C). This specification is achieved via factory laser trimming of internal resistors and is documented in Table 1 of the datasheet. The actual measured threshold for any given unit falls between 2.564V and 2.696V at temperature extremes, ensuring robust margin against 2.8V Li⁺ battery discharge curves.

Does MAX6375UR26 require any external components to function?

No, the MAX6375UR26 requires zero external components. Its precision bandgap reference, comparator, and factory-trimmed voltage divider are fully integrated. Unlike adjustable supervisors, it needs only VCC, GND, and the OUT signal connection - eliminating resistor networks, capacitors, or calibration steps. This reduces PCB area, BOM cost, and assembly complexity while improving long-term stability.

What output configuration does MAX6375UR26 use, and how does it interface with a microcontroller?

The MAX6375UR26 uses an active-low push-pull output. When VCC drops below 2.63V, OUT is driven low (≤0.4V @ 100µA sink); otherwise, it is driven high (≥0.8×VCC). This allows direct connection to standard CMOS/TTL RESET inputs without external pull-up resistors. For example, connecting MAX6375UR26 OUT to an STM32 NRST pin provides immediate, glitch-free reset assertion during brownout.

How does MAX6375UR26 handle short voltage transients on the VCC line?

The MAX6375UR26 incorporates built-in transient immunity: it ignores negative-going VCC glitches ≤20µs wide when the overdrive (VTH – VCC) is ≥20mV. This behavior is characterized in the "Maximum Transient Duration vs. Threshold Overdrive" graph (Figure MAX6375-04). As a result, the device remains immune to typical switching regulator ripple, ESD-induced dips, or load-step artifacts - preventing false resets in noisy power environments.

Is MAX6375UR26 available in lead-free packaging, and what is its package footprint?

Yes, MAX6375UR26 is available in RoHS-compliant, lead-free packaging. The "-T" suffix denotes leaded; replace with "+T" (e.g., MAX6375UR26+T) for lead-free ordering. It uses the JEDEC-standard 3-pin SOT23-3 package (MO-178AA), with 1.3mm × 2.9mm body size and 0.95mm pitch - identical footprint to SC70-3 but with higher power dissipation rating (320mW vs. 174mW).