Analog Devices Inc./Maxim Integrated MAX6737XKVHD3+

Overview

MAX6737XKVHD3+ from Maxim Integrated is a dual fixed-voltage microprocessor supervisor IC with push-pull active-low reset output, manual reset input, and factory-trimmed thresholds of 2.188V (VCC1) and 1.575V (VCC2), 150ms minimum reset timeout, 6µA supply current, and SC70-5 package. It monitors core and I/O supplies in portable battery-powered systems to ensure reliable µP startup and fault recovery.

For engineers reviewing the MAX6737XKVHD3+ datasheet, MAX6737XKVHD3+ pinout, MAX6737XKVHD3+ application, or MAX6737XKVHD3+ equivalent, this page delivers verified electrical parameters, exact SC70-5 pin mapping, confirmed dual-supply reset behavior, and validated alternative options for multivoltage embedded designs requiring low-quiescent-current supervision.

Technical Context

The MAX6737XKVHD3+ implements two independent voltage comparators with precision internal references (2.188V and 1.575V), each feeding a shared reset timer that restarts on any threshold violation. Its push-pull RESET output drives directly to VCC1 without external pullup, eliminating board-level components required by open-drain variants.

Reset assertion occurs within 35µs of VCC1 or VCC2 falling 100mV below threshold; deassertion requires both supplies to remain above threshold for ≥150ms. The MR input features 1.5kΩ internal pullup to VCC1 and 100ns glitch rejection, enabling direct connection to momentary switches or logic signals.

Key Specifications

Pinout & Package

Package: SC70-5 (1.6mm × 1.6mm, 0.65mm pitch, 0.9mm max height), RoHS-compliant lead-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6736XKVHD3+, the MAX6737XKVHD3+ eliminates external pullup components via its push-pull output, reducing BOM cost and PCB area; versus TPS3808G15DBVR, it provides true dual-rail supervision in a single SC70-5 package, avoiding system-level complexity from multiple supervisors.

Availability

MAX6737XKVHD3+ is available at Aetrix Electronics and suitable for portable medical sensors, notebook power management, industrial PLC I/O modules, and GPS tracking devices requiring stable component supply across extended temperature ranges and ultra-low power consumption.

Supply support for MAX6737XKVHD3+ 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 high-reliability, low-power solutions.

The MAX6736–MAX6745 family targets multivoltage embedded systems needing compact, low-quiescent-current supervision-specifically addressing space-constrained portable and battery-powered equipment where dual-rail coordination is critical.

FAQ

What are the exact reset threshold voltages for MAX6737XKVHD3+?

The MAX6737XKVHD3+ has factory-trimmed reset thresholds of 2.188V for VCC1 and 1.575V for VCC2, as defined by the "VH" suffix per Table 1 in the datasheet. These values are guaranteed over -40°C to +85°C with ±0.05V tolerance, enabling precise supervision of standard 2.2V I/O and 1.5V/1.6V core supplies without external adjustment.

Does MAX6737XKVHD3+ require an external pullup resistor on the RESET pin?

No, MAX6737XKVHD3+ does not require an external pullup resistor because it features a push-pull RESET output. The output actively drives high (to VCC1) and low (to GND), unlike open-drain variants such as MAX6736XKVHD3+. This eliminates the need for external components and simplifies interface with unidirectional µP reset inputs.

What is the reset timeout period for MAX6737XKVHD3+ and how is it determined?

The MAX6737XKVHD3+ has a minimum reset timeout period of 150ms, indicated by the "D3" suffix in its part number. This timeout begins after both VCC1 and VCC2 rise above their respective thresholds and ensures the reset signal remains asserted long enough for microprocessor initialization. The actual duration varies slightly with temperature but stays within 150–300ms across operating conditions.

Can MAX6737XKVHD3+ monitor a 1.2V supply rail?

No, MAX6737XKVHD3+ cannot directly monitor a 1.2V rail because its factory-trimmed VCC2 threshold is fixed at 1.575V. For 1.2V supervision, consider the MAX6737XKWD3+ (1.665V threshold) or use an external resistor divider with an adjustable supervisor like MAX6738. The MAX6737XKVHD3+ is optimized for 1.5V–1.6V core supplies, not sub-1.5V domains.

What package type and dimensions does MAX6737XKVHD3+ use?

MAX6737XKVHD3+ uses the SC70-5 package: 1.6mm × 1.6mm body size, 0.65mm pin pitch, and maximum height of 0.9mm. This ultra-small outline reduces PCB area by ~40% compared to standard SOT23-5 packages while maintaining compatibility with automated assembly processes and reflow soldering profiles for lead-free RoHS compliance.