Analog Devices Inc./Maxim Integrated MAX6736XKVDD3+

Overview

The MAX6736XKVDD3+ from Maxim Integrated is a dual-voltage microprocessor supervisor IC with two factory-trimmed reset thresholds (VTH1 = 2.925V, VTH2 = 2.188V), open-drain active-low RESET output, manual reset input (MR), and 150ms minimum reset timeout period. It monitors primary I/O supply (VCC1) and secondary core supply (VCC2) in portable battery-powered systems, asserting reset if either falls below its threshold. Designed for space-constrained applications, it operates from -40°C to +85°C in the 5-pin SC70 package.

For engineers reviewing the MAX6736XKVDD3+ datasheet, MAX6736XKVDD3+ pinout, MAX6736XKVDD3+ application, or MAX6736XKVDD3+ equivalent, key selection considerations include its dual fixed-threshold architecture, 6µA quiescent current, open-drain RESET with external pullup requirement, MR-driven reset assertion, and compatibility with low-voltage µP systems requiring reliable power-on and brownout detection.

Technical Context

The MAX6736XKVDD3+ implements independent voltage monitoring for VCC1 (2.925V threshold) and VCC2 (2.188V threshold), with reset assertion triggered when either supply drops below its respective threshold. Its internal timer guarantees a minimum 150ms reset pulse width after all supplies recover, preventing premature µP release during marginal power conditions.

It features an active-low manual reset input (MR) with internal 1.5kΩ pullup to VCC1, supporting pushbutton-initiated resets. The open-drain RESET output requires an external pullup resistor and remains asserted until both monitored supplies exceed their thresholds for the full timeout period - no restart-on-recovery behavior is implemented for this variant.

Key Specifications

Pinout & Package

Package: 5-pin SC70 (1.6mm × 1.6mm, 0.5mm pitch), surface-mount, lead-free (indicated by '+' suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6737XKVDD3+, the MAX6736XKVDD3+ offers lower system-level BOM count via open-drain flexibility but requires external pullup; versus TPS3808G18DBVR, it delivers true dual-rail supervision essential for modern low-voltage SoC power domains, despite higher IQ.

Availability

The MAX6736XKVDD3+ is available at Aetrix Electronics and suitable for portable medical sensors, industrial handheld terminals, and POS equipment requiring stable component supply with guaranteed long-term availability and lead-free compliance.

Supply support for MAX6736XKVDD3+ 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) is a semiconductor company specializing in precision analog, mixed-signal, and power management ICs for industrial, computing, and portable applications.

The MAX6736–MAX6745 family was designed specifically for space- and power-constrained multivoltage systems requiring reliable, low-quiescent-current supervision of I/O and core rails - targeting battery-powered and embedded controllers.

FAQ

What are the factory-trimmed reset thresholds for the MAX6736XKVDD3+?

The MAX6736XKVDD3+ has two factory-trimmed reset thresholds: VTH1 = 2.925V for VCC1 (I/O supply) and VTH2 = 2.188V for VCC2 (core supply), both with ±2.5% tolerance over -40°C to +85°C. These values are encoded in the part number suffix 'V' (VCC1) and 'Y' (VCC2) per Maxim's Table 2, confirmed in the device's Electrical Characteristics table.

Does the MAX6736XKVDD3+ require an external pullup resistor on the RESET pin?

Yes, the MAX6736XKVDD3+ features an open-drain RESET output and requires an external pullup resistor to VCC1 or another logic rail. Typical values range from 10kΩ to 100kΩ depending on rise-time requirements and bus loading. This is explicitly stated in the Pin Description section and Functional Diagram of the MAX6736–MAX6745 datasheet.

What is the minimum pulse width required on the MR pin to trigger reset in the MAX6736XKVDD3+?

The MAX6736XKVDD3+ requires a minimum MR input pulse width of 1µs to assert RESET. After MR is released, RESET remains low for the full 150ms timeout period. This specification is documented in the Electrical Characteristics table under "MR Minimum Input Pulse Width (tMPW)" and verified across temperature.

Can the MAX6736XKVDD3+ monitor a 1.8V VCC1 supply?

No - the MAX6736XKVDD3+ is configured with a fixed 2.925V VCC1 threshold and cannot reliably supervise a 1.8V rail. For 1.8V monitoring, select a variant with suffix 'W' (1.665V) or 'V' (1.575V) per Table 2, such as MAX6736XKWD3+. The 2.925V threshold is intended for 3.0V/3.3V I/O supplies, not sub-2V domains.

Is the MAX6736XKVDD3+ RoHS-compliant and lead-free?

Yes, the '+' suffix in MAX6736XKVDD3+ explicitly denotes lead-free, RoHS-compliant packaging per Maxim's ordering conventions. This is confirmed in the Ordering Information section, which states: "Specify lead-free by replacing '-T' with '+T' when ordering." The device meets JEDEC J-STD-020 moisture sensitivity level 1.