Analog Devices Inc./Maxim Integrated MAX6380XR41+

Overview

MAX6380XR41+ from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector with a factory-trimmed threshold of 4.100V ±2.5% over temperature, 500nA supply current at +25°C, and guaranteed operation down to VCC = 1V. It monitors regulated system or battery voltages in portable equipment and asserts OUT low when VCC falls below threshold.

For engineers reviewing the MAX6380XR41+ datasheet, MAX6380XR41+ pinout, MAX6380XR41+ application, or MAX6380XR41+ equivalent, this device serves as a precision reset supervisor for 3.3V–5V systems requiring transient-immune, space-constrained power monitoring with no external components.

Technical Context

The MAX6380XR41+ integrates a precision bandgap reference, comparator, and laser-trimmed resistive divider to set its 4.100V detection threshold. Its open-drain output sinks up to 100µA while asserted and requires an external pull-up for logic-level compatibility across voltage domains.

Designed for immunity to fast VCC transients, it ignores negative-going glitches ≤200µs at 100mV overdrive (VTH − VCC), with propagation delay of 9.5µs (typ) on falling edge and hysteresis of 0.1mV - enabling stable reset assertion without chatter during brownout recovery.

Key Specifications

Pinout & Package

MAX6380XR41+ is housed in a 3-pin SC70 package (2.0mm × 1.25mm × 0.95mm), optimized for high-density PCB layouts in portable and wearable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB33DBVR and TPS3808G33DBVR, MAX6380XR41+ uniquely delivers 4.10V precision detection, open-drain output, and 500nA ICC in a 3-pin SC70 - making it the only option meeting all three requirements simultaneously for compact, low-power, multi-rail reset supervision.

Availability

MAX6380XR41+ is available at Aetrix Electronics and suitable for portable medical sensors, smart home gateways, industrial I/O modules, and automotive body control units requiring stable component supply with lead-free compliance and tape-and-reel delivery.

Supply support for MAX6380XR41+ 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 interface applications in industrial, medical, and communications markets.

The MAX6375–MAX6380 family was developed specifically for ultra-low-power voltage monitoring in battery-critical systems - prioritizing nanoscale ICC, factory-trimmed accuracy, and minimal footprint without external components.

FAQ

What is the exact reset threshold voltage of the MAX6380XR41+?

The MAX6380XR41+ has a factory-trimmed nominal reset threshold of 4.100V, with guaranteed tolerance of ±2.5% over the full operating temperature range of −40°C to +85°C. This value is laser-trimmed during production and specified in Table 1 of the datasheet under suffix "R41". The actual measured threshold for a given unit falls between 4.038V (min) and 4.161V (max) at +25°C, and between 3.997V and 4.202V across temperature.

Does the MAX6380XR41+ require an external pull-up resistor on the OUT pin?

Yes, the MAX6380XR41+ features an open-drain, active-low output and requires an external pull-up resistor to establish a valid logic-high level on the OUT signal. The datasheet specifies that the pull-up may connect to any supply rail up to 5.5V. A typical value is 10kΩ to 3.3V or 1.8V, selected to ensure VOL ≤ 0.4V at ISINK = 100µA while minimizing standby current - critical for battery-powered applications using the MAX6380XR41+.

Can the MAX6380XR41+ operate reliably below 1.8V supply voltage?

Yes, the MAX6380XR41+ is fully specified to operate from VCC = 1.2V up to 5.5V and guarantees correct output logic state down to VCC = 1V. This enables use in ultra-low-voltage scenarios such as post-regulator brownout detection or energy-harvesting systems where the supply rail may dip below conventional logic thresholds - a key capability distinguishing the MAX6380XR41+ from many competing supervisors.

What is the propagation delay specification for the MAX6380XR41+?

The MAX6380XR41+ has a typical propagation delay of 9.5µs on the falling edge (VCC crossing VTH downward), measured under conditions of VOD = 100mV. This delay is consistent across the MAX6378/MAX6379/MAX6380 series and is guaranteed not to exceed 20µs over temperature. The rising-edge delay is also specified but less critical for reset assertion; the 9.5µs figure ensures timely MCU reset initiation within tight timing budgets.

Is the MAX6380XR41+ pin-compatible with other devices in the MAX6375–MAX6380 family?

Yes, the MAX6380XR41+ shares identical 3-pin SC70 pinout (GND, OUT, VCC) and electrical behavior with all members of the MAX6375–MAX6380 family in the XR package variant. This allows direct substitution within the same package footprint when threshold voltage, output type (open-drain), and temperature range align - for example, MAX6377XR29+ (2.93V) or MAX6380XR46+ (4.63V) can replace MAX6380XR41+ without PCB changes, provided system-level threshold requirements are met.