Analog Devices Inc./Maxim Integrated MAX6737XKVRD3+

Overview

MAX6737XKVRD3+ 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 2.925V (VCC1) and 2.188V (VCC2). It operates from 1.2V to 5.5V supply range, draws only 6µA quiescent current, and provides 150ms minimum reset timeout - ideal for battery-powered portable systems requiring reliable power-on reset and brownout detection.

For engineers reviewing the MAX6737XKVRD3+ datasheet, MAX6737XKVRD3+ pinout, MAX6737XKVRD3+ application, or MAX6737XKVRD3+ equivalent, key selection criteria include dual-supply monitoring capability, push-pull RESET drive strength, precise factory-set thresholds, low-power operation, and SC70-5 package compatibility in space-constrained embedded designs.

Technical Context

The MAX6737XKVRD3+ monitors two independent supply rails (VCC1 and VCC2) using precision internal voltage references. Reset assertion occurs when either rail falls below its respective factory-trimmed threshold (2.925V/2.188V), with hysteresis of 0.5% ensuring noise immunity against supply transients.

It features a dedicated active-low manual reset input (MR) with internal 1.5kΩ pullup to VCC1 and 150ms minimum timeout after MR release. The push-pull RESET output drives high to VCC1 (≥0.8×VCC1 at 800µA source) and low to ≤0.4V (at 3.2mA sink), eliminating need for external pullup resistors.

Key Specifications

Pinout & Package

MAX6737XKVRD3+ is housed in a 5-pin SC70-5 package (1.6mm × 1.6mm × 0.9mm height) with moisture sensitivity level (MSL) 1 and lead-free +T suffix compliance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6736XKVRD3+, the MAX6737XKVRD3+ eliminates external pullup components via push-pull RESET, reducing BOM cost and board area; versus TPS3808G15DBVR, it provides true dual-rail supervision essential for modern mixed-voltage processors.

Availability

MAX6737XKVRD3+ is available at Aetrix Electronics and suitable for portable/battery-powered equipment, multivoltage systems, and notebook computers requiring stable component supply across industrial temperature ranges and long-term production cycles.

Supply support for MAX6737XKVRD3+ 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 high-performance analog, mixed-signal, and power management ICs for industrial, automotive, communications, and consumer markets.

The MAX6736–MAX6745 family was designed specifically for low-power dual- and triple-voltage microprocessor supervision in space- and energy-constrained portable electronics, delivering precision thresholds, minimal quiescent current, and compact packaging.

FAQ

What is the exact reset threshold voltage for VCC1 and VCC2 on MAX6737XKVRD3+?

The MAX6737XKVRD3+ has factory-trimmed reset thresholds of 2.925V for VCC1 and 2.188V for VCC2, as indicated by the "VR" suffix per Table 1 in the datasheet. These values are guaranteed over the full -40°C to +85°C operating temperature range with ±2.5% tolerance, enabling precise dual-rail monitoring without external adjustment components.

Does MAX6737XKVRD3+ require an external pullup resistor on the RESET pin?

No, MAX6737XKVRD3+ does not require an external pullup resistor because it features a push-pull RESET output. The output actively drives high to ≥0.8×VCC1 (at 800µA source) and low to ≤0.4V (at 3.2mA sink), allowing direct connection to microprocessor reset inputs without additional components - unlike open-drain variants such as MAX6736XKVRD3+.

What is the minimum pulse width required on the MR pin to trigger reset on MAX6737XKVRD3+?

The MR pin on MAX6737XKVRD3+ requires a minimum input pulse width of 1µs to reliably assert RESET. This short duration allows compatibility with mechanical pushbuttons and digital logic signals. After MR returns high, the RESET output remains low for the full 150ms timeout period (D3 option), ensuring robust system initialization.

Can MAX6737XKVRD3+ monitor a 1.8V core supply alongside a 3.3V I/O supply?

Yes, MAX6737XKVRD3+ can monitor a 1.8V I/O supply and 1.2V–3.3V core supply, but its factory-trimmed thresholds are fixed at 2.925V (VCC1) and 2.188V (VCC2). For a 3.3V/1.8V system, VCC1 = 3.3V exceeds the 2.925V threshold (valid), while VCC2 = 1.8V falls below the 2.188V threshold - triggering unwanted reset. Select a variant like MAX6737XKTD3+ (3.075V/1.665V) instead for that combination.

What is the supply current consumption of MAX6737XKVRD3+ at 25°C and 85°C?

At TA = +25°C, MAX6737XKVRD3+ consumes 6µA typical total supply current (ICC1 + ICC2). At TA = +85°C, the datasheet specifies maximum ICC1 of 10µA and ICC2 of 20µA, resulting in ≤30µA worst-case total current. This ultra-low power profile supports multi-year operation in battery-backed applications across the full industrial temperature range.