Analog Devices Inc./Maxim Integrated MAX6741XKSDD3+

Overview

MAX6741XKSDD3+ from Maxim Integrated is a dual-voltage microprocessor supervisor IC with push-pull RESET and open-drain VCC1 Power-OK (POK1) output, factory-trimmed thresholds of 2.925V (VCC1) and 2.188V (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 MAX6741XKSDD3+ datasheet, MAX6741XKSDD3+ pinout, MAX6741XKSDD3+ application, or MAX6741XKSDD3+ equivalent, this page delivers verified electrical parameters, confirmed POK1 timing behavior, exact SC70-5 terminal mapping, and validated alternatives for dual-supply reset supervision with sequencing capability.

Technical Context

The MAX6741XKSDD3+ integrates two independent voltage monitors (VCC1 and VCC2) with factory-set thresholds, a dedicated POK1 output that asserts high only after VCC1 exceeds 2.925V for ≥37.5ms, and a push-pull RESET output deasserted only when both supplies remain above threshold for ≥150ms. It operates across -40°C to +85°C with no external components required for basic sequencing.

Its POK1 logic is fully decoupled from MR and VCC2 inputs, enabling reliable VCC1-to-VCC2 enable control. The internal 50kΩ pullup on RESET supports manual reset detect functionality without external circuitry, and the 0.5% reset threshold hysteresis ensures immunity to supply noise during power transitions.

Key Specifications

Pinout & Package

MAX6741XKSDD3+ uses the 5-pin SC70-5 package with exposed pad (not electrically connected). Pin 1 is RESET (push-pull active-low), Pin 2 is GND, Pin 3 is VCC2 (secondary supply input), Pin 4 is POK1 (open-drain active-high), and Pin 5 is VCC1 (primary supply input).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-supply reset supervision applications.

Compared with MAX6744XKSDD3+, the MAX6741XKSDD3+ provides unique VCC1 sequencing via POK1 but omits MR; versus TPS3808G18DBVR, it delivers true dual-rail supervision and hardware-enforced sequencing - critical for processors requiring ordered power delivery.

Availability

MAX6741XKSDD3+ is available at Aetrix Electronics and suitable for portable equipment, notebook computers, and industrial controllers requiring stable component supply, guaranteed -40°C to +85°C operation, and precise dual-rail power sequencing capability.

Supply support for MAX6741XKSDD3+ 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 was engineered specifically for low-power, space-constrained multivoltage systems requiring accurate reset supervision and hardware-based power sequencing - targeting portable, computing, and industrial control markets.

FAQ

What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6741XKSDD3+?

The MAX6741XKSDD3+ has factory-trimmed reset thresholds of 2.925V for VCC1 and 2.188V for VCC2, with ±1.5% tolerance over -40°C to +85°C. These values are defined by the "KS" suffix per Table 1 in the datasheet and are not adjustable. Both thresholds include 0.5% hysteresis to prevent chatter during marginal supply conditions.

Does the MAX6741XKSDD3+ provide a manual reset input (MR)?

No, the MAX6741XKSDD3+ does not include a manual reset input. Per the Selector Guide and Pin Description, MR is present only on MAX6736–MAX6739 and MAX6740/MAX6743 variants. The MAX6741XKSDD3+ relies solely on monitored supply voltages and its internal timer for reset assertion - confirming absence of Pin 3 MR functionality in its SC70-5 pinout.

What is the function and timing behavior of the POK1 output on the MAX6741XKSDD3+?

The POK1 output on MAX6741XKSDD3+ is an open-drain active-high signal that goes high only after VCC1 exceeds 2.925V and remains above threshold for ≥37.5ms (tPOKP). It stays high until VCC1 drops below threshold, with no timeout on deassertion. This enables precise enable control of downstream regulators - a key differentiator from standard RESET outputs.

Can the MAX6741XKSDD3+ monitor a 1.2V core supply?

Yes, the MAX6741XKSDD3+ supports VCC2 monitoring down to 0.9V, so a 1.2V core supply falls within its specified range. Its VCC2 threshold is fixed at 2.188V, meaning it cannot supervise 1.2V directly - but the device's architecture allows VCC2 to be any supply ≥0.9V, while the 2.188V threshold applies only when VCC2 is the monitored rail. For 1.2V supervision, a different variant (e.g., MAX6741XKSD3+) with matching threshold would be required.

What package type and dimensions does the MAX6741XKSDD3+ use?

The MAX6741XKSDD3+ uses the SC70-5 package: 1.6mm × 1.6mm body size, 0.95mm maximum height, 0.65mm pin pitch, and Pin 1 marked by a dot. It is lead-free (RoHS-compliant), tape-and-reel packaged, and rated for reflow soldering per JEDEC J-STD-020. The exposed pad is non-functional and may be left floating or grounded for thermal relief.