Analog Devices Inc./Maxim Integrated MAX6376UR26

Overview

MAX6376UR26 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 2.63V 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 low-power IoT sensors.

For engineers reviewing the MAX6376UR26 datasheet, MAX6376UR26 pinout, MAX6376UR26 application, or MAX6376UR26 equivalent, key selection criteria include its active-high push-pull output configuration, 2.63V trip point, SC70/SOT23-3 package compatibility, transient immunity up to 200µs at 100mV overdrive, and guaranteed output state retention down to 1V supply.

Technical Context

The MAX6376UR26 implements a precision bandgap reference and comparator with internally trimmed resistors to set its 2.63V detection threshold. Its active-high push-pull output drives high (VOH ≥ 0.8×VCC) when VCC drops below VTH and low (VOL ≤ 0.4V) otherwise, eliminating external pull-up components.

It achieves ±2.5% threshold accuracy across –40°C to +85°C and exhibits propagation delay of 6.3µs (typical) with hysteresis of 100mV. The device ignores fast negative-going VCC transients - maximum tolerable glitch duration is 200µs at 100mV overdrive - ensuring robust operation in noisy power environments.

Key Specifications

Pinout & Package

MAX6376UR26 is packaged in a 3-pin SOT23-3 (lead-free -T suffix) with JEDEC MO-178AC outline. Pin 1 = OUT (active-high push-pull), Pin 2 = GND, Pin 3 = VCC. This 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 TLV803R26DBZR and TPS3801K26DBVR, the MAX6376UR26 uniquely balances ultra-low 500nA current, active-high push-pull output, and precise 2.63V threshold - making it optimal for space- and energy-constrained portable designs requiring direct MCU reset assertion without external components.

Availability

MAX6376UR26 is available at Aetrix Electronics and suitable for battery-powered wearables, industrial sensor nodes, medical diagnostic handhelds, and smart meter backup systems requiring stable component supply and long-term manufacturability.

Supply support for MAX6376UR26 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 supply monitoring in portable and battery-critical systems, delivering precision voltage detection with minimal board area and zero external components.

FAQ

What is the exact reset threshold voltage of the MAX6376UR26?

The MAX6376UR26 has a factory-trimmed nominal reset threshold voltage of 2.63V, with guaranteed accuracy of ±2.5% over the full operating temperature range of –40°C to +85°C. This value is confirmed in Table 1 of the official datasheet and corresponds to the "R26" suffix in the ordering code. The MAX6376UR26 maintains this precision without requiring external calibration or trimming components.

Does the MAX6376UR26 require an external pull-up resistor?

No, the MAX6376UR26 does not require an external pull-up resistor because it features an active-high push-pull output stage. When VCC falls below 2.63V, the OUT pin actively drives high (VOH ≥ 0.8×VCC); when VCC is above threshold, it actively drives low (VOL ≤ 0.4V). This eliminates external components and simplifies interface to standard CMOS/TTL reset inputs - a key design advantage of the MAX6376UR26 over open-drain alternatives.

What is the minimum supply voltage at which the MAX6376UR26 guarantees correct output state?

The MAX6376UR26 guarantees correct output logic state (high when VCC < VTH, low otherwise) down to 1V VCC, as explicitly stated in the General Description and Electrical Characteristics sections of the datasheet. This capability allows the MAX6376UR26 to remain functional during deep brown-out conditions where other detectors may fail, making it especially valuable in battery-powered applications approaching end-of-life voltage.

How does the MAX6376UR26 handle power supply transients?

The MAX6376UR26 incorporates built-in transient immunity that rejects fast negative-going VCC glitches. According to the Typical Operating Characteristics graph (Figure MAX6375-04), it tolerates transients up to 200µs in duration when the overdrive (VTH – VCC) is 100mV. This feature prevents false resets caused by switching noise or load dumps - a critical reliability attribute for the MAX6376UR26 in electrically harsh environments like motor-driven or RF-intensive systems.

Is the MAX6376UR26 available in both SC70 and SOT23 packages?

The MAX6376UR26 is specified in the Ordering Information table as a SOT23-3 variant (UR suffix), with top mark FZHC. While the MAX6376XR26-T exists in SC70-3 (top mark ACZ), the MAX6376UR26-T is exclusively offered in the 3-pin SOT23-3 package per Maxim's official ordering guide. Both share identical electrical specifications, but the SOT23 variant offers slightly higher power dissipation (320mW vs. 174mW) and different thermal characteristics - important considerations for the MAX6376UR26 in thermally constrained layouts.