Analog Devices Inc./Maxim Integrated MAX6741XKWTD3

Overview

The MAX6741XKWTD3 from Maxim Integrated is a dual-voltage microprocessor supervisor IC with push-pull RESET and open-drain VCC1 Power-OK (POK1) output, factory-trimmed reset thresholds of 3.075V (VCC1) and 1.665V (VCC2), 150ms minimum reset timeout, and 6µA supply current - designed for power-supply sequencing in portable multivoltage systems.

For engineers reviewing the MAX6741XKWTD3 datasheet, MAX6741XKWTD3 pinout, MAX6741XKWTD3 application, or MAX6741XKWTD3 equivalent, this page delivers verified electrical parameters, SC70-5 package layout, POK1 timing behavior, dual-threshold monitoring capability, and real-world sequencing use cases - all confirmed from Maxim's official datasheet Rev 2 (12/05).

Technical Context

The MAX6741XKWTD3 monitors two independent supply rails (VCC1 and VCC2) using precision internal voltage references. It asserts active-low RESET when either rail falls below its factory-set threshold and maintains it for ≥150ms after both rails recover. Its dedicated open-drain POK1 output deasserts only after VCC1 exceeds 3.075V for ≥37.5ms, enabling controlled enablement of downstream regulators.

This device implements a deterministic timeout-based reset architecture with no external capacitor dependency. The POK1 logic operates independently of MR and VCC2 inputs, and RESET assertion is synchronized to VCC1/VCC2 transient immunity thresholds (≥100mV overdrive required to avoid false triggers under short glitches).

Key Specifications

Pinout & Package

MAX6741XKWTD3 is housed in a 5-pin SC70-5 package (1.6mm × 1.6mm × 0.9mm height), optimized for space-constrained portable designs. Pin 1 is RESET (push-pull active-low), Pin 2 is GND, Pin 3 is VCC2, Pin 4 is POK1 (open-drain active-high), and Pin 5 is VCC1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6741XKWTD3, MAX6744XKWTD3 removes POK1 but retains identical dual-threshold supervision, while TPS3808G33DBVR offers lower current but sacrifices VCC2 monitoring - making MAX6741XKWTD3 uniquely suited for compact dual-rail sequencing where both voltage integrity and timing control are mandatory.

Availability

MAX6741XKWTD3 is available at Aetrix Electronics and suitable for portable equipment, notebook computers, and industrial controllers requiring stable component supply with guaranteed -40°C to +85°C operation and SC70 packaging.

Supply support for MAX6741XKWTD3 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 connectivity applications.

The MAX6736–MAX6745 family was engineered specifically for low-power dual/triple-voltage microprocessor supervision in space- and energy-constrained portable systems - emphasizing ultra-low ICC, factory-trimmed thresholds, and integrated sequencing features like POK1.

FAQ

What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6741XKWTD3?

The MAX6741XKWTD3 has factory-trimmed reset thresholds of 3.075V for VCC1 and 1.665V for VCC2, as defined by the "TW" suffix per Maxim's Table 1. These values are guaranteed over -40°C to +85°C with ±75mV and ±27mV tolerances respectively, and are fully characterized in the Electrical Characteristics table on page 3 of the datasheet.

Does the MAX6741XKWTD3 provide power-good signaling, and how is it implemented?

Yes, the MAX6741XKWTD3 provides VCC1 Power-OK signaling via its open-drain POK1 output (Pin 4). POK1 remains low until VCC1 exceeds 3.075V for a minimum of 37.5ms, then goes high (requiring external pullup). This signal is electrically independent of MR and VCC2, making it ideal for enabling downstream regulators in strict sequencing applications.

What is the function of the RESET pin on the MAX6741XKWTD3, and what drive strength does it offer?

The RESET pin (Pin 1) on the MAX6741XKWTD3 is a push-pull active-low output that asserts when VCC1 or VCC2 drops below its threshold. It sources up to 800µA and sinks up to 3.2mA at VCC1 ≥ 4.75V or ≥ 4.25V respectively, allowing direct connection to most µP reset inputs without external components.

Can the MAX6741XKWTD3 be used in battery-powered applications, and what is its current consumption?

Yes, the MAX6741XKWTD3 is explicitly optimized for battery-powered applications, drawing only 6µA maximum total supply current (ICC1 + ICC2) across -40°C to +85°C. Its ultra-low ICC enables multi-year operation in coin-cell–powered devices such as asset trackers and wireless sensors where reset integrity must be maintained during deep sleep.

Is the MAX6741XKWTD3 pin-compatible with other devices in the MAX6736–MAX6745 family?

No - the MAX6741XKWTD3 uses a unique pinout within the family: Pin 4 is POK1 (not MR or RSTIN), distinguishing it from MAX6736/MAX6737 (MR on Pin 3) and MAX6740/MAX6743 (RSTIN on Pin 3). Board-level replacement requires layout revision; refer to the Pin Configurations diagram on page 15 of the datasheet for verification.