Analog Devices Inc./Maxim Integrated MAX6327XR28-T

Overview

MAX6327XR28-T from Maxim Integrated is an active-high push-pull microprocessor supervisory circuit that monitors 2.8V power supplies, asserts a reset signal when VCC falls below 2.800V (±1.5% at +25°C), maintains reset for ≥100ms after VCC recovery, draws ≤1.0µA supply current at 3V, and operates from -40°C to +85°C in SC70-3 packaging - used in portable battery-powered µP systems requiring reliable brownout detection.

For engineers reviewing the MAX6327XR28-T datasheet, MAX6327XR28-T pinout, MAX6327XR28-T application, or MAX6327XR28-T equivalent, this page delivers verified reset threshold accuracy, ultra-low quiescent current, temperature-stable timeout behavior, push-pull output drive capability, and SC70 package compatibility - all critical for embedded power-monitoring designs.

Technical Context

The MAX6327XR28-T implements a precision bandgap-based voltage comparator with factory-trimmed 2.800V reset threshold, ±2.5% tolerance over -40°C to +85°C, and 40ppm/°C tempco. Its internal timing circuit guarantees ≥100ms reset assertion after power-up or brownout recovery.

It features active-high push-pull RESET output capable of sourcing ≥500µA at 0.8·VCC while asserted, sinking ≤0.4V at 1.2mA when deasserted, and exhibits immunity to VCC transients ≤20µs at 100mV overdrive - enabling robust operation in noisy power environments.

Key Specifications

Pinout & Package

MAX6327XR28-T is housed in a 3-pin SC70-3 package (outline X3-2), measuring 2.0mm × 2.1mm × 0.95mm, with gull-wing leads and RoHS-compliant lead-free finish (ordered as "+T" suffix).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor reset supervision applications.

Compared with MAX6327XR28-T, the MAX6327UR28-T offers identical functionality in a larger SOT23 package with higher thermal margin, while the MAX809TR28-T trades higher current and open-drain limitations for established design reuse - making MAX6327XR28-T optimal for space-constrained, ultra-low-power, push-pull–driven µP reset applications.

Availability

MAX6327XR28-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter communication units, and automotive body control modules requiring stable component supply, long-lifecycle support, and guaranteed factory-trimmed reset accuracy.

Supply support for MAX6327XR28-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 industrial, medical, communications, and consumer applications - emphasizing reliability, integration, and low-power operation.

The MAX6326/MAX6327/MAX6328 family targets cost-sensitive, space-constrained µP supervision needs in battery-powered and industrial equipment, delivering factory-trimmed thresholds, sub-µA quiescent current, and robust transient immunity in minimal 3-pin packages.

FAQ

What is the exact reset threshold voltage of MAX6327XR28-T and how tightly is it specified?

The MAX6327XR28-T has a nominal reset threshold of 2.800V, with ±1.5% tolerance at +25°C and ±2.5% over the full -40°C to +85°C operating range. This is factory-trimmed using laser calibration, and the 40ppm/°C tempco ensures minimal drift across temperature - critical for maintaining reset accuracy in varying environmental conditions. The MAX6327XR28-T datasheet confirms these values in the Electrical Characteristics table under VTH parameter.

Does MAX6327XR28-T provide active-high or active-low reset output, and what is its drive capability?

The MAX6327XR28-T provides an active-high push-pull RESET output, meaning it drives high during VCC fault and for ≥100ms after recovery. It sources ≥500µA at 0.8·VCC when asserted and sinks ≤0.4V at 1.2mA when deasserted. This eliminates the need for an external pull-up resistor and allows direct connection to most µP reset inputs - a key distinction from open-drain variants like MAX6328XR28-T.

What is the supply current consumption of MAX6327XR28-T and under what conditions is it measured?

The MAX6327XR28-T consumes ≤1.0µA maximum supply current (ICC) when VCC = 3.0V and VTH ≤ 2.93V (which applies to the R28 variant), with typical consumption of 0.5µA. At VCC = 5.5V, ICC remains ≤1.75µA. This ultra-low current is measured with no load on RESET and is guaranteed over temperature - enabling decade-long operation from primary batteries in MAX6327XR28-T–based systems.

Can MAX6327XR28-T operate reliably during severe power supply transients?

Yes - the MAX6327XR28-T is designed to ignore fast negative-going VCC transients. For example, at 100mV overdrive (i.e., VCC dipping 100mV below 2.800V), it rejects transients up to 20µs in duration, as shown in the Typical Operating Characteristics graph "Maximum Transient Duration vs. Reset Threshold Overdrive". This immunity prevents spurious resets in electrically noisy environments such as motor drives or switch-mode power supplies.

What package type and footprint does MAX6327XR28-T use, and is it RoHS compliant?

The MAX6327XR28-T uses the SC70-3 package (outline X3-2), with dimensions 2.0mm × 2.1mm × 0.95mm and gull-wing leads. It is RoHS compliant and shipped in tape-and-reel format. The "-T" suffix denotes leaded packaging; lead-free versions use "+T". Land pattern number 90-0208 applies, and the device is pin-compatible with other SC70-3 supervisors including MAX803/MAX809 series - confirmed in the Pin Configuration section of the MAX6327XR28-T datasheet.