Analog Devices Inc./Maxim Integrated MAX6383XR26D7-T

Overview

MAX6383XR26D7-T from Maxim Integrated is a low-power, open-drain active-low microprocessor supervisory circuit with factory-set 2.63V reset threshold and 1200ms minimum V_CC reset timeout. It monitors single supply voltage (1.0V–5.5V), consumes only 3µA at 1.8V, guarantees valid reset output down to V_CC = 1V, and is used in battery-powered embedded systems requiring reliable power-on reset and brownout protection.

For engineers reviewing the MAX6383XR26D7-T datasheet, MAX6383XR26D7-T pinout, MAX6383XR26D7-T application, or MAX6383XR26D7-T equivalent, key selection considerations include its open-drain active-low reset output, ±2.5% reset threshold accuracy over –40°C to +125°C, 1200ms timeout, SC70-3 package, and compatibility with critical μP reset timing requirements in portable and industrial control designs.

Technical Context

The MAX6383XR26D7-T implements a precision bandgap-based voltage comparator with internal 2.63V reference and a monolithic timer for fixed 1200ms reset assertion after V_CC recovery. Its open-drain RESET output requires an external pullup resistor and remains asserted during V_CC undervoltage, manual reset (not applicable-no MR pin), or negative-going transients exceeding immunity thresholds.

No manual reset input (MR) or auxiliary RESET IN pin is present-this variant is a minimal 3-pin configuration (V_CC, GND, RESET) optimized for space-constrained applications where only primary supply monitoring is required. Reset assertion is guaranteed for V_CC ≥ 1.0V, and the device exhibits 60ppm/°C reset threshold tempco.

Key Specifications

Pinout & Package

MAX6383XR26D7-T uses a 3-pin SC70 package (outline 21-0075, land pattern 90-0208) with exposed pad not electrically connected. Pin 1 = RESET (open-drain active-low), Pin 2 = V_CC, Pin 3 = GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6383XR26D7-T, MAX6326XR26D7-T offers identical functionality with mature process assurance, while TPS3123E12DBVR delivers lower quiescent current in a non-pin-compatible SOT-23-3 package-making it suitable only when board redesign is acceptable and sub-2µA ICC is critical.

Availability

MAX6383XR26D7-T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered IoT nodes, industrial PLC I/O modules, and automotive body control units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6383XR26D7-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 connectivity applications, with emphasis on reliability and low-power operation.

The MAX6381–MAX6390 family delivers single/dual low-voltage, low-power μP reset circuits targeting space- and energy-constrained embedded systems where deterministic reset timing and wide temperature operation are essential.

FAQ

What is the exact reset threshold voltage of the MAX6383XR26D7-T?

The MAX6383XR26D7-T has a factory-set nominal reset threshold of 2.63V, with guaranteed tolerance of ±2.5% over the full operating temperature range (–40°C to +125°C). This value is laser-trimmed during production and does not require external calibration or resistor networks.

Does the MAX6383XR26D7-T include a manual reset input (MR) pin?

No, the MAX6383XR26D7-T does not feature a manual reset input. It is a 3-pin variant (V_CC, GND, RESET) with no MR terminal-unlike 4-pin SC70 versions such as MAX6384XR26D7-T. Manual reset capability requires selecting a different member of the MAX6381–MAX6390 family.

What package type and dimensions does the MAX6383XR26D7-T use?

The MAX6383XR26D7-T is supplied in a 3-pin SC70 package (outline number 21-0075), measuring 1.25mm × 0.85mm with 0.65mm pitch. The package code is X3+2, and the recommended land pattern is 90-0208 per Maxim's package documentation.

Can the MAX6383XR26D7-T operate with a 1.2V supply rail?

No-the MAX6383XR26D7-T requires V_CC ≥ 1.0V to function, but its 2.63V reset threshold means it cannot supervise a 1.2V rail. It is intended for monitoring rails ≥ 2.7V (e.g., 2.8V, 3.3V, or 5.0V). For 1.2V supervision, a different threshold variant (e.g., MAX6383XR12D7-T) would be required.

Is the MAX6383XR26D7-T RoHS-compliant and lead-free?

Yes, the "+T" suffix in MAX6383XR26D7-T explicitly denotes a lead(Pb)-free and RoHS-compliant package per Maxim Integrated's ordering conventions. The device meets JEDEC J-STD-020 moisture sensitivity level 1 and is qualified for reflow soldering at +260°C peak temperature.