Analog Devices Inc./Maxim Integrated MAX6377XR22+T

Overview

MAX6377XR22+T from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector with a factory-trimmed 2.20V threshold, ±2.5% accuracy over temperature, 500nA supply current, and SC70-3 package. It monitors VCC in battery-powered systems and asserts OUT low when supply drops below threshold-used for precision brownout detection in portable medical sensors and wearables.

For engineers reviewing the MAX6377XR22+T datasheet, MAX6377XR22+T pinout, MAX6377XR22+T application, or MAX6377XR22+T equivalent, key selection criteria include threshold accuracy at low VCC (down to 1V), transient immunity against sub-200µs glitches, open-drain output compatibility with mixed-voltage logic domains, and SC70 footprint constraints in space-constrained PCB layouts.

Technical Context

The MAX6377XR22+T implements a precision bandgap reference and comparator with internally trimmed resistors to fix the 2.20V trip point-no external components required. Its open-drain output sinks up to 100µA at VCC ≥1.2V while asserted, and supports pull-up to any voltage ≤5.5V.

Designed for immunity to fast transients, it suppresses output pulses for negative-going VCC excursions under the Maximum Transient Duration curve (e.g., ≤140µs at 100mV overdrive). Guaranteed functional down to VCC = 1V, it maintains correct logic state across -40°C to +85°C without calibration.

Key Specifications

Pinout & Package

MAX6377XR22+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), lead-free, tape-and-reel compatible. 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 detector applications.

Compared with TLV803EB22DBZR and APX803S-22SA-7, the MAX6377XR22+T uniquely balances ultra-low ICC (500nA), SC70 size, and open-drain versatility-making it optimal for miniaturized, long-life designs requiring flexible logic interfacing without sacrificing accuracy or transient rejection.

Availability

MAX6377XR22+T is available at Aetrix Electronics and suitable for portable medical sensors, wearable health monitors, industrial wireless sensor nodes, low-power GPS trackers, and battery-backed memory systems requiring stable component supply across extended production lifecycles.

Supply support for MAX6377XR22+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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, medical, and communications applications.

The MAX6375–MAX6380 family delivers ultra-low-power voltage supervision for battery-critical systems-engineered to eliminate external components while maintaining ±2.5% threshold accuracy and robust transient immunity in miniature SC70/SOT23 packages.

FAQ

What is the exact factory-trimmed threshold voltage of MAX6377XR22+T?

The MAX6377XR22+T has a nominal threshold voltage of 2.20V, with a guaranteed range of 2.145V to 2.250V over -40°C to +85°C (±2.5% tolerance). This value is laser-trimmed at wafer test and does not require external calibration-confirmed in Table 1 of the official MAX6375–MAX6380 datasheet revision 3.

Does MAX6377XR22+T support operation below 1.2V VCC?

MAX6377XR22+T is guaranteed to maintain correct output logic state down to VCC = 1V, though its specified operating range begins at 1.2V. Below 1.2V, the device remains functional but propagation delay and leakage may deviate from datasheet limits-designs requiring sub-1.2V brownout detection should validate timing margins per application note AN6375.

What pull-up resistor value is recommended for the open-drain OUT of MAX6377XR22+T?

For MAX6377XR22+T, select a pull-up resistor that ensures VOL ≤0.4V at ISINK = 100µA (per Electrical Characteristics table). With a 3.3V pull-up, RPU ≤33kΩ satisfies this; for 5V, RPU ≤46kΩ. Values >100kΩ risk slow rise time in noisy environments-verified in Figure 1 of the MAX6375–MAX6380 datasheet.

Is MAX6377XR22+T pin-compatible with other MAX6375–MAX6380 variants in SC70-3?

Yes-MAX6377XR22+T shares identical SC70-3 pinout (GND/OUT/VCC) and footprint with all MAX6375–MAX6380 XR-series devices. Threshold, output type (open-drain), and electrical specs differ, but PCB layout is interchangeable across the XR family-confirmed in the Pin Configuration diagram and Ordering Information tables.

How does MAX6377XR22+T reject power-supply transients?

MAX6377XR22+T incorporates internal filtering to ignore fast VCC transients: it suppresses output pulses for negative-going excursions ≤140µs at 100mV overdrive (VTH − VCC), as shown in Figure MAX6375-04. This design prevents false resets during DC/DC converter switching noise or ESD-induced supply droop-validated across -40°C to +85°C.