Analog Devices Inc./Maxim Integrated MAX6380XR43+

Overview

MAX6380XR43+ from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector designed for precision power-supply monitoring in battery-powered systems. It features a factory-trimmed 4.30V threshold (±2.5% over temperature), 500nA supply current, and operates down to 1V VCC while asserting output when supply falls below threshold. Used in portable equipment for reliable brownout detection and system reset initiation.

For engineers reviewing the MAX6380XR43+ datasheet, MAX6380XR43+ pinout, MAX6380XR43+ application, or MAX6380XR43+ equivalent, key selection criteria include its 4.30V trip point, SC70-3 open-drain output configuration, ±2.5% threshold accuracy, transient immunity up to 100µs at 200mV overdrive, and compatibility with 1.2V–5.5V supply rails.

Technical Context

The MAX6380XR43+ implements a precision bandgap reference and comparator with internally trimmed resistors to set its 4.30V threshold-no external components required. Its open-drain output sinks current when asserted and requires an external pull-up to any voltage ≤5.5V, enabling flexible logic-level interfacing.

It ignores fast negative-going VCC transients up to 100µs (at 200mV overdrive), ensuring glitch immunity in noisy power environments. All internal circuitry remains functional and outputs retain correct logic state down to VCC = 1V, supporting deep low-power operation during battery discharge.

Key Specifications

Pinout & Package

MAX6380XR43+ is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), lead-free and RoHS-compliant. The compact footprint suits space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB33DBVR and APX803S-43SA-7, the MAX6380XR43+ uniquely combines 4.30V precision, 500nA ultra-low current, and open-drain output in SC70-3-enabling longer battery life and greater interface flexibility in 4.3V-system brownout protection.

Availability

MAX6380XR43+ is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor nodes, and USB-C power banks requiring stable component supply with guaranteed long-term availability and lead-free compliance.

Supply support for MAX6380XR43+ 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 in industrial, automotive, and consumer markets.

The MAX6375–MAX6380 family delivers ultra-low-power voltage supervision for battery and power-rail monitoring, targeting applications where minimal current draw and precise threshold accuracy are critical to system reliability.

FAQ

What is the exact factory-trimmed threshold voltage of the MAX6380XR43+?

The MAX6380XR43+ has a nominal threshold voltage of 4.30V, with ±2.5% accuracy over the full operating temperature range (-40°C to +85°C). This value is laser-trimmed at wafer test and confirmed per Table 1 in the datasheet for suffix "R43", corresponding to the MAX6380 series' 4.30V option. The MAX6380XR43+ does not require external calibration.

Does the MAX6380XR43+ require an external pull-up resistor on its OUT pin?

Yes-the MAX6380XR43+ features an open-drain output, so an external pull-up resistor is mandatory to establish a defined logic-high state when the output is not asserted. The pull-up may connect to any voltage up to 5.5V, independent of VCC. Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements. This design enables flexible voltage-level translation in the MAX6380XR43+ application.

Can the MAX6380XR43+ operate reliably below 1.2V VCC?

No-the MAX6380XR43+ is specified to operate from 1.2V to 5.5V VCC. While its output retains correct logic state down to 1V (ensuring valid reset assertion during final battery discharge), internal circuitry-including the bandgap reference and comparator-requires ≥1.2V to function correctly and guarantee threshold accuracy. Operation below 1.2V is outside specification and not characterized for the MAX6380XR43+.

How does the MAX6380XR43+ handle short power-supply transients?

The MAX6380XR43+ rejects negative-going VCC transients up to 100µs in duration when the overdrive (VTH – VCC) is 200mV, as shown in the "Maximum Transient Duration vs. Threshold Overdrive" graph. This built-in immunity prevents false resets caused by switching noise or load dumps. The MAX6380XR43+ achieves this through internal filtering and hysteresis, eliminating need for external RC networks.

Is the MAX6380XR43+ pin-compatible with other devices in the MAX6375–MAX6380 family?

Yes-all MAX6375–MAX6380 variants in SC70-3 (e.g., MAX6380XR43+, MAX6378XR33+, MAX6375XR22+) share identical pinout (GND, OUT, VCC) and package dimensions. However, output logic (active-low open-drain vs. active-high push-pull) and threshold voltage differ by part number, so electrical compatibility must be verified per application. The MAX6380XR43+ uses the same SC70-3 footprint as other XR-suffixed members.