Analog Devices Inc./Maxim Integrated MAX6741XKVHD3

Overview

The MAX6741XKVHD3 from Maxim Integrated is a dual-voltage microprocessor supervisor IC with power-OK (POK1) output, factory-trimmed VCC1/VCC2 reset thresholds of 2.925V/2.188V, 150ms minimum reset timeout, and 6µA supply current. It monitors I/O and core supplies in multivoltage systems and asserts active-low RESET when either supply drops below its threshold, supporting reliable power-up sequencing in portable and embedded controllers.

For engineers reviewing the MAX6741XKVHD3 datasheet, MAX6741XKVHD3 pinout, MAX6741XKVHD3 application, or MAX6741XKVHD3 equivalent, key selection criteria include its SC70-5 package, open-drain POK1 for VCC1-to-VCC2 sequencing, dual fixed-threshold supervision, -40°C to +85°C operation, and compatibility with battery-powered and multivoltage processor platforms.

Technical Context

The MAX6741XKVHD3 implements dual independent voltage monitoring with precision factory-set thresholds (VTH1 = 2.925V, VTH2 = 2.188V), hysteresis of 0.5%, and a dedicated open-drain POK1 output that deasserts after 37.5–75.0ms once VCC1 exceeds VTH1. Its reset logic restarts the 150–300ms timeout on any threshold violation.

It features an internal 50kΩ pullup on the open-drain RESET output for manual reset detect functionality, supports MR input debouncing (37.5–75.0ms), and maintains valid RESET state while either VCC1 or VCC2 remains above 1.2V - enabling robust operation during brownout conditions.

Key Specifications

Pinout & Package

MAX6741XKVHD3 is housed in a space-saving 5-pin SC70-5 package (1.6mm × 1.6mm × 0.9mm), optimized for high-density portable designs. Pin 1 is RESET (open-drain active-low), Pin 2 is GND, Pin 3 is VCC2 (secondary supply input), Pin 4 is POK1 (open-drain active-high power-OK output), and Pin 5 is VCC1 (primary supply input).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6741XKVHD7 and TPS3808G18DBVR, the MAX6741XKVHD3 uniquely delivers integrated dual-voltage supervision with power-OK sequencing in a minimal SC70 footprint - eliminating design complexity and board area cost associated with discrete or multi-IC solutions.

Availability

MAX6741XKVHD3 is available at Aetrix Electronics and suitable for portable/battery-powered equipment, multivoltage systems, and notebook computers requiring stable component supply and guaranteed long-term availability.

Supply support for MAX6741XKVHD3 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 management, sensing, and interface applications in industrial, automotive, and consumer markets.

The MAX6736–MAX6745 family was engineered specifically for low-power, space-constrained multivoltage systems - delivering dual/triple supply supervision, sequencing control, and ultra-low quiescent current in miniature SC70 packages.

FAQ

What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6741XKVHD3?

The MAX6741XKVHD3 has factory-trimmed reset thresholds of 2.925V for VCC1 and 2.188V for VCC2, with ±0.075V tolerance over -40°C to +85°C. These values correspond to the "SY" suffix in Table 1 and are laser-trimmed during production - no external resistor network is needed for accuracy or calibration.

Does the MAX6741XKVHD3 support power-supply sequencing, and how is it implemented?

Yes, the MAX6741XKVHD3 supports sequencing via its open-drain POK1 output (Pin 4). POK1 goes high only after VCC1 exceeds 2.925V for 37.5–75.0ms, enabling direct connection to the enable pin of a downstream VCC2 regulator - ensuring I/O supply stability before core activation.

What is the function of the RESET pin on the MAX6741XKVHD3, and what drive strength does it provide?

The RESET pin (Pin 1) on the MAX6741XKVHD3 is an open-drain active-low output that asserts when VCC1 or VCC2 falls below its threshold. It has no internal pullup; an external pullup resistor is required. The output sinks ≥3.2mA at 0.4V (VCC1 ≥4.25V), compatible with standard CMOS µP reset inputs.

Can the MAX6741XKVHD3 be used in battery-powered applications with strict current budgets?

Yes - the MAX6741XKVHD3 draws only 6µA typical supply current across its full operating range, making it ideal for battery-critical applications like handheld instruments and remote sensors. Its low ICC1/ICC2 consumption is validated at 1.8V, 2.5V, and 3.3V supply points per the datasheet's electrical characteristics table.

Is the MAX6741XKVHD3 pin-compatible with other devices in the MAX6736–MAX6745 family?

No - the MAX6741XKVHD3 uses a unique pinout among the family: Pin 4 is POK1 (not MR, RSTIN, or PFI). It shares the SC70-5 package with MAX6736–MAX6745 variants but differs electrically and functionally from MAX6736 (MR), MAX6738 (RSTIN), and MAX6742 (PFI/PFO). Always verify pin mapping against the specific variant's pin description table.