Analog Devices Inc./Maxim Integrated MAX6737XKRVD3

Overview

The MAX6737XKRVD3 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 3.075V (VCC1) and 2.313V (VCC2), operating over -40°C to +85°C in a 5-pin SC70 package. It asserts reset when either supply falls below its threshold and maintains reset for ≥150ms after both supplies recover - ideal for reliable power-on initialization in portable and multivoltage embedded systems.

For engineers reviewing the MAX6737XKRVD3 datasheet, MAX6737XKRVD3 pinout, MAX6737XKRVD3 application, or MAX6737XKRVD3 equivalent, key selection criteria include its push-pull RESET output (no external pullup required), 6µA supply current, dual fixed-threshold monitoring, 150ms timeout, and SC70-5 footprint compatibility with space-constrained designs.

Technical Context

The MAX6737XKRVD3 integrates two independent voltage comparators with precision internal references (±1.5% threshold accuracy over temperature), a digital timeout timer, and an MR input with 1.5kΩ internal pullup to VCC1. Its push-pull RESET output drives high to VCC1 (VOH ≥ 0.8×VCC1 at 800µA) and low to ≤0.4V (VOL ≤ 0.4V at 3.2mA sink), eliminating external biasing components.

Reset assertion is triggered by VCC1 < 3.075V, VCC2 < 2.313V, or MR low for ≥1µs; reset remains asserted for ≥150ms after all monitored voltages exceed thresholds. The device guarantees valid RESET state while either VCC1 or VCC2 > 1.2V, supporting brownout detection during partial power loss.

Key Specifications

Pinout & Package

Package: 5-pin SC70-5 (2.0mm × 1.25mm, 0.65mm pitch), surface-mount, lead-free compatible.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6737XKRVD3, MAX6736XKRVD3 requires an external pullup but offers identical supervision accuracy and timing; TPS3808G33DBVR reduces current draw but sacrifices dual-voltage monitoring - making MAX6737XKRVD3 the only option for compact, self-contained dual-rail reset control.

Availability

The MAX6737XKRVD3 is available at Aetrix Electronics and suitable for portable/battery-powered equipment, multivoltage systems, and notebook computers requiring stable component supply with guaranteed long-term availability.

Supply support for MAX6737XKRVD3 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, communications, and consumer applications.

The MAX6736–MAX6745 family was designed specifically for low-power dual-/triple-voltage microprocessor supervision in space-constrained, battery-sensitive systems - emphasizing ultra-low IQ, factory-trimmed accuracy, and minimal external components.

FAQ

What is the exact reset threshold voltage for VCC1 on the MAX6737XKRVD3?

The MAX6737XKRVD3 has a factory-trimmed VCC1 reset threshold of 3.075V with ±1.5% accuracy over the full -40°C to +85°C temperature range. This value is fixed by the "T" suffix in the part number and does not require external adjustment. The threshold is referenced to an internal bandgap and remains stable under varying load and line conditions.

Does the MAX6737XKRVD3 require an external pullup resistor on the RESET pin?

No, the MAX6737XKRVD3 features a push-pull RESET output, so it does not require an external pullup resistor. The output actively drives high to VCC1 (≥0.8×VCC1 at 800µA source) and low to ≤0.4V (at 3.2mA sink), enabling direct connection to µP reset inputs without additional components - unlike open-drain variants such as MAX6736XKRVD3.

What is the minimum pulse width required on the MR pin to trigger reset on the MAX6737XKRVD3?

The MAX6737XKRVD3 requires a minimum MR input pulse width of 1µs to initiate reset assertion. The MR pin has an internal 1.5kΩ pullup to VCC1 and supports CMOS-level drive or momentary switch-to-ground interfaces. Glitch rejection is ≥100ns, preventing spurious resets from noise on the MR line.

Can the MAX6737XKRVD3 monitor a 1.2V core supply?

No - the MAX6737XKRVD3 is a dual fixed-threshold device with preset VCC1 = 3.075V and VCC2 = 2.313V. It cannot monitor 1.2V directly. For sub-2V core supplies, consider the MAX6738/MAX6739 series with adjustable RSTIN input (down to 0.488V threshold) or the MAX6745 with 0.788V VCC2 option (suffix "D").

What is the supply current consumption of the MAX6737XKRVD3 at 25°C and 3.3V VCC1?

The MAX6737XKRVD3 draws 6µA typical supply current (ICC1) when VCC1 = 3.3V, VCC1 > VCC2, no load, and reset is not asserted. This ultra-low quiescent current is specified across the full operating temperature range and enables multi-year operation in battery-powered applications such as handheld meters and remote sensors.