Analog Devices Inc./Maxim Integrated MAX6741XKZWD3

Overview

The MAX6741XKZWD3 from Maxim Integrated is a dual-voltage microprocessor supervisor IC with power-OK (POK1) output, factory-trimmed reset thresholds of 3.075V (VCC1) and 1.665V (VCC2), 150ms minimum reset timeout, 6µA supply current, and SC70-5 package - designed for precise power-supply sequencing in portable and multivoltage systems.

For engineers reviewing the MAX6741XKZWD3 datasheet, MAX6741XKZWD3 pinout, MAX6741XKZWD3 application, or MAX6741XKZWD3 equivalent, key selection criteria include VCC1/VCC2 threshold pairing, POK1 timing for supply enable control, open-drain RESET behavior, -40°C to +85°C operation, and compatibility with battery-powered I/O-core sequencing architectures.

Technical Context

The MAX6741XKZWD3 integrates two independent voltage monitors (VCC1 and VCC2) with precision factory-set thresholds, an open-drain active-low RESET output, and a dedicated open-drain active-high POK1 output referenced to VCC1. Its internal timer asserts RESET only after all monitored supplies exceed their thresholds for ≥150ms (D3 option), while POK1 deasserts after VCC1 exceeds VTH1 for 37.5–75.0ms.

It supports power-supply sequencing by enabling downstream regulators via POK1, features no manual reset input (MR absent), lacks RSTIN/PFI inputs, and operates with guaranteed functionality down to VCC1 ≥ 1.2V - making it distinct from MAX6740/MAX6742 variants with adjustable or power-fail functions.

Key Specifications

Pinout & Package

MAX6741XKZWD3 is housed in a 5-pin SC70-5 package (2.0mm × 1.25mm, 0.65mm pitch), optimized for high-density portable designs. Pinout conforms to standard SC70 top-view orientation with GND at Pin 2, enabling straightforward layout integration.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6741XKZWD3, MAX6744XKZWD3 offers push-pull drive for direct µP reset control, while MAX6741XKZWD7 extends reset hold time to 1200ms - both retain identical sequencing capability via POK1 and dual-threshold supervision.

Availability

MAX6741XKZWD3 is available at Aetrix Electronics and suitable for portable equipment, multivoltage systems, and notebook computers requiring stable component supply, guaranteed -40°C to +85°C operation, and compact SC70 packaging.

Supply support for MAX6741XKZWD3 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.

The MAX6736–MAX6745 family delivers low-power, multi-rail supervision for battery-operated and space-constrained systems - with MAX6741XKZWD3 specifically targeting deterministic I/O-to-core power sequencing.

FAQ

What is the function of the POK1 pin on the MAX6741XKZWD3?

The POK1 pin on the MAX6741XKZWD3 is an open-drain active-high output that signals when the primary supply (VCC1) has risen above its 3.075V threshold and remained stable for 37.5–75.0ms. It is used to enable downstream power supplies - for example, turning on the VCC2 regulator only after VCC1 is confirmed good. The MAX6741XKZWD3 does not require external pullup on POK1 for basic sequencing, though one is needed to establish the high logic level.

Does the MAX6741XKZWD3 support manual reset functionality?

No, the MAX6741XKZWD3 does not include a manual reset (MR) input. Unlike MAX6736–MAX6739 or MAX6740/MAX6742 variants, its pinout omits MR and instead dedicates Pin 4 to the POK1 output. Reset assertion is fully automatic based on VCC1 and VCC2 voltage levels. If manual reset capability is required, consider MAX6744XKZWD3 (same thresholds and POK1, but with MR pin) or MAX6740XKZWD3 (dual fixed + adjustable threshold with MR).

What are the exact reset threshold voltages for MAX6741XKZWD3?

The MAX6741XKZWD3 has factory-trimmed reset thresholds of 3.075V for VCC1 (Pin 5) and 1.665V for VCC2 (Pin 3), as indicated by the "ZW" suffix per Table 1 in the datasheet. These values are specified over -40°C to +85°C with tolerances of ±0.125V (VCC1) and ±0.045V (VCC2). The thresholds are fixed and non-adjustable - no external resistor network is needed or supported for these inputs.

Can the MAX6741XKZWD3 monitor negative supply voltages?

No, the MAX6741XKZWD3 cannot monitor negative voltages. It lacks PFI/PFO pins (present only on MAX6742/MAX6745) and has no circuitry for inverting or level-shifting negative inputs. Its VCC1 and VCC2 inputs are designed for positive supplies between 1.2V and 5.5V. For negative rail monitoring, use MAX6742XKZWD3 or MAX6745XKZWD3 with their dedicated PFI comparator input and external resistor-divider configuration.

What is the purpose of the 150ms reset timeout (D3 suffix) in MAX6741XKZWD3?

The 150ms reset timeout (D3 suffix) in MAX6741XKZWD3 ensures the RESET signal remains asserted for a minimum duration after all monitored supplies recover - preventing premature processor release during marginal power conditions. This timeout begins only after both VCC1 ≥ 3.075V and VCC2 ≥ 1.665V are simultaneously satisfied, and it guarantees stable initialization for most microcontrollers and FPGAs. The MAX6741XKZWD3 implements this with an internal timer; no external capacitor is required.