Analog Devices Inc./Maxim Integrated MAX6380XR43+T

Overview

MAX6380XR43+T from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector optimized for battery and power-supply monitoring in portable systems. It features a factory-trimmed 4.30V threshold (±2.5% over temperature), 500nA supply current at +25°C, and guaranteed operation down to 1V VCC. Its role is to assert a logic-low output when supply voltage falls below the preset threshold - used in Li+-battery-powered devices requiring precise brownout detection.

For engineers reviewing the MAX6380XR43+T datasheet, MAX6380XR43+T pinout, MAX6380XR43+T application, or MAX6380XR43+T equivalent, key selection criteria include its 4.30V trip point, SC70-3 open-drain configuration, transient immunity up to 100µs at 20mV overdrive, and compatibility with 1.2V–5.5V supply rails in space-constrained designs.

Technical Context

The MAX6380XR43+T implements a precision bandgap reference and comparator with internally trimmed resistors to set its 4.30V threshold. It ignores fast VCC transients - maximum allowable negative glitch duration is 100µs at 20mV overdrive (VTH − VCC = 20mV) - ensuring robust reset assertion without false triggering.

As part of the MAX6375–MAX6380 family, it belongs to the high-threshold subgroup (3.30V–4.63V) and uses an open-drain output stage compatible with pull-up voltages up to 5.5V. All variants operate across −40°C to +85°C and maintain correct output logic state down to 1V VCC.

Key Specifications

Pinout & Package

MAX6380XR43+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for ultra-compact PCB layouts in wearables and IoT sensors.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EC43DBVR and APX803S-43SA-7, the MAX6380XR43+T uniquely combines 4.30V precision, 500nA ICC, and open-drain output in SC70-3 - enabling smaller footprints, lower power, and greater interface flexibility in next-gen portable designs.

Availability

MAX6380XR43+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial telemetry modules, and smart wearable chargers requiring stable component supply with lead-free compliance and tape-and-reel packaging.

Supply support for MAX6380XR43+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 and mixed-signal ICs for power management, sensing, and connectivity in demanding industrial and portable applications.

The MAX6375–MAX6380 family was developed specifically for ultra-low-power voltage supervision in battery-critical systems - prioritizing nanoamp ICC, factory-trimmed thresholds, and transient-hardened operation in minimal footprints.

FAQ

What is the exact reset threshold voltage of the MAX6380XR43+T?

The MAX6380XR43+T has a factory-trimmed nominal reset threshold of 4.30V, with ±2.5% accuracy over the full operating temperature range (−40°C to +85°C). This value is laser-trimmed during manufacturing and confirmed in Table 1 of the datasheet under suffix "R43". The MAX6380XR43+T is part of the high-threshold subgroup (3.30V–4.63V) within the MAX6375–MAX6380 series.

Does the MAX6380XR43+T support operation below 1.8V VCC?

Yes, the MAX6380XR43+T is fully specified to operate down to 1.2V VCC and guarantees correct output logic state (active-low assertion when VCC < 4.30V) even at 1.0V. This capability enables use with deeply discharged Li+ cells or low-voltage microcontroller cores, and is explicitly verified in the Absolute Maximum Ratings and Electrical Characteristics tables.

What is the maximum allowable VCC transient duration that the MAX6380XR43+T will ignore?

The MAX6380XR43+T rejects negative-going VCC transients up to 100µs in duration when the overdrive (VTH − VCC) is 20mV, as shown in Figure MAX6375-04 of the datasheet. At higher overdrive levels (e.g., 100mV), the maximum tolerable pulse width decreases to ~20µs - a design feature that prevents false resets in electrically noisy environments.

Can the MAX6380XR43+T's open-drain output drive a 5V logic input?

Yes, the MAX6380XR43+T's open-drain OUT terminal is rated to 5.5V, allowing direct connection to a 5V pull-up resistor. When asserted, it sinks ≥100µA with VOL ≤0.4V (at ISINK = 100µA), ensuring valid logic-low levels for 5V CMOS inputs. No level shifter is required, simplifying interface design in mixed-voltage systems.

Is the MAX6380XR43+T available in both leaded and lead-free packaging?

Yes, the MAX6380XR43+T is offered in lead-free packaging, indicated by the "+T" suffix per Maxim's ordering convention. The "+T" denotes RoHS-compliant, matte-tin lead finish. Leaded versions use "-T", but Aetrix Electronics stocks only the lead-free MAX6380XR43+T variant, supplied in tape-and-reel format per standard ordering requirements.