Analog Devices Inc./Maxim Integrated MAX6376XR28-T

Overview

MAX6376XR28-T from Maxim Integrated is an ultra-low-power, active-high push-pull voltage detector optimized for battery and power-supply monitoring in portable systems. It features a factory-trimmed 2.80V threshold (±2.5% over temperature), 500nA supply current at +25°C, and guaranteed operation down to VCC = 1V. Its SC70-3 package and single-supply operation make it ideal for space-constrained Li+-powered devices requiring reliable brownout detection.

For engineers reviewing the MAX6376XR28-T datasheet, MAX6376XR28-T pinout, MAX6376XR28-T application, or MAX6376XR28-T equivalent, key selection criteria include its active-high output logic, 2.80V trip point, SC70-3 footprint, transient-immune reset behavior, and compatibility with low-voltage microcontroller reset inputs.

Technical Context

The MAX6376XR28-T implements a precision bandgap reference and comparator with internally trimmed resistors to set its 2.80V threshold-no external components required. It asserts OUT high when VCC falls below VTH and holds valid logic state down to 1V supply, enabling robust reset generation even during deep discharge.

Its propagation delay is 6.3µs (typical, falling edge) with 200mV overdrive, and it rejects transients ≤140µs at 20mV underdrive per the Maximum Transient Duration vs. Threshold Overdrive curve. The device uses a 419-transistor die and operates across –40°C to +85°C without calibration.

Key Specifications

Pinout & Package

MAX6376XR28-T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), compatible with standard SOT23-3 PCB footprints but with reduced thermal mass and smaller outline. 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 TLV803EB28DBZR and APX803S-28SA-7, the MAX6376XR28-T uniquely combines SC70-3 packaging, 500nA current, and active-high push-pull output-enabling direct replacement in space-limited, low-power designs without layout or firmware changes.

Availability

MAX6376XR28-T is available at Aetrix Electronics and suitable for battery-powered wearables, industrial sensor nodes, medical handhelds, and smart meter backup systems requiring stable component supply and long-term manufacturability.

Supply support for MAX6376XR28-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, sensing, and interface applications in industrial, medical, and consumer markets.

The MAX6375–MAX6380 family was engineered specifically for ultra-low-power voltage monitoring in portable and battery-critical systems-prioritizing nanoscale current, factory-trimmed accuracy, and minimal external component count.

FAQ

What is the exact reset threshold voltage of the MAX6376XR28-T?

The MAX6376XR28-T has a factory-trimmed nominal reset threshold of 2.80V, 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 applies specifically to the R28 suffix variant of the MAX6376 series. The MAX6376XR28-T does not require external calibration or resistor adjustment to achieve this specification.

Does the MAX6376XR28-T require an external pull-up resistor on its output?

No, the MAX6376XR28-T does not require an external pull-up resistor because it features an active-high push-pull output stage. Pin 2 (OUT) actively drives high (up to VOH = 0.8×VCC) when VCC falls below 2.80V and actively drives low when VCC is above threshold. This eliminates the need for external biasing and reduces component count compared to open-drain alternatives like the MAX6377XR28-T.

What package type is used for the MAX6376XR28-T, and is it compatible with SOT23-3 layouts?

The MAX6376XR28-T is supplied in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm). While pinout matches SOT23-3 (GND–OUT–VCC), the SC70-3 body is smaller and thinner. It is not mechanically compatible with standard SOT23-3 footprints without pad redesign, though many layout tools support dual-footprint land patterns. The MAX6376UR28-T variant uses SOT23-3 for drop-in compatibility where board space permits.

Can the MAX6376XR28-T operate reliably at VCC = 1.2V?

Yes, the MAX6376XR28-T is fully specified to operate and assert correct output logic down to VCC = 1.2V, and its output remains valid even as low as 1.0V. This capability is explicitly guaranteed in the datasheet's Absolute Maximum Ratings and Electrical Characteristics tables, making it suitable for deep-discharge monitoring in primary lithium and alkaline battery systems where voltage may fall below 2.0V during end-of-life.

How does the MAX6376XR28-T handle fast voltage transients on the VCC line?

The MAX6376XR28-T incorporates internal filtering to reject fast negative-going VCC transients. According to the Typical Operating Characteristics graph "Maximum Transient Duration vs. Threshold Overdrive", it ignores glitches ≤140µs wide when VCC dips 20mV below VTH. This immunity prevents false resets in electrically noisy environments such as motor-driven or switching-power-supply systems, and is inherent to the device architecture-not dependent on external RC networks.