Analog Devices Inc./Maxim Integrated MAX6741XKSVD3+

Overview

MAX6741XKSVD3+ 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 2.925V (VCC1) and 2.188V (VCC2), 150ms minimum reset timeout, 6µA supply current, and SC70-5 package. It ensures reliable power-on reset and sequencing in multivoltage embedded systems.

For engineers reviewing the MAX6741XKSVD3+ datasheet, MAX6741XKSVD3+ pinout, MAX6741XKSVD3+ application, or MAX6741XKSVD3+ equivalent, this page delivers verified electrical parameters, confirmed POK1 timing behavior, exact SC70-5 terminal mapping, and validated alternatives for dual-supply sequencing designs requiring guaranteed reset assertion during VCC1/VCC2 brownouts.

Technical Context

The MAX6741XKSVD3+ integrates two independent voltage monitors with precision factory-set thresholds and a dedicated VCC1 Power-OK output. Its internal timer asserts RESET low when either VCC1 falls below 2.925V or VCC2 drops below 2.188V, holding reset for ≥150ms after both supplies recover.

POK1 operates independently: it remains low while VCC1 < 2.925V, then transitions high only after VCC1 exceeds 2.925V for ≥37.5ms (tPOKP). This enables controlled enablement of downstream VCC2 regulators without dependency on MR or VCC2 status.

Key Specifications

Pinout & Package

MAX6741XKSVD3+ uses the 5-pin SC70-5 package (1.6mm × 1.6mm × 0.9mm height), optimized for high-density layouts and reflow-compatible assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6741XKSVD3+, MAX6744XKSVD3+ offers identical supervision accuracy and timing but eliminates the need for an external POK1 pullup, while TPS3808G18DBVR trades dual-rail capability for lower current and simpler single-supply use cases.

Availability

MAX6741XKSVD3+ is available at Aetrix Electronics and suitable for portable medical devices, industrial PLCs, automotive infotainment units, and FPGA-based edge AI accelerators requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6741XKSVD3+ 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 communications markets.

The MAX6736–MAX6745 family delivers ultra-low-power dual/triple-supply supervisors with factory-trimmed thresholds and integrated sequencing features for multirail embedded systems demanding high reliability and minimal board space.

FAQ

What is the exact reset threshold voltage for VCC1 on MAX6741XKSVD3+?

The MAX6741XKSVD3+ has a factory-trimmed VCC1 reset threshold of 2.925V, with ±2.5% tolerance over -40°C to +85°C. This value is fixed by the "S" suffix in the part number and applies to all units regardless of batch or date code. The threshold is referenced internally to a precision bandgap and does not require external calibration.

Does MAX6741XKSVD3+ support power-supply sequencing between VCC1 and VCC2?

No - MAX6741XKSVD3+ does not sequence VCC1 and VCC2 relative to each other. Instead, it provides a VCC1 Power-OK (POK1) output that signals when VCC1 has stabilized above 2.925V for ≥37.5ms. Designers use POK1 to externally enable the VCC2 regulator, thereby implementing controlled sequencing. VCC2 monitoring remains independent and does not gate POK1 activation.

What is the function of the POK1 pin on MAX6741XKSVD3+?

The POK1 pin on MAX6741XKSVD3+ is an open-drain active-high output that transitions high only after VCC1 exceeds its 2.925V threshold for a minimum of 37.5ms. It requires an external pullup resistor (typically 10kΩ to VCC1) and is used to enable downstream power supplies or logic blocks in strict power-up order, ensuring VCC1 stability before VCC2 activation.

Can MAX6741XKSVD3+ monitor a 1.8V supply as VCC2?

No - MAX6741XKSVD3+ has fixed VCC2 threshold options defined by its part number suffix. For MAX6741XKSVD3+, VCC2 threshold is 2.188V (per "Y" suffix in "XKSVD3+"). To supervise a 1.8V rail, select a variant with "W", "I", "G", or "E" suffix (e.g., MAX6741XKWVD3+ = 1.665V). The device cannot be adjusted post-manufacture.

Is MAX6741XKSVD3+ pin-compatible with other MAX67xx supervisors in SC70-5?

Yes - MAX6741XKSVD3+ shares identical SC70-5 pinout (RESET, GND, VCC2, POK1, VCC1) with MAX6744XKSVD3+ and MAX6736–MAX6739 variants in the same package. However, pin functions differ across the family: e.g., Pin 4 is POK1 on MAX6741/MAX6744 but RSTIN on MAX6738/MAX6739. Always verify functional mapping per datasheet before substitution.