Analog Devices Inc./Maxim Integrated MAX6741XKYHD3

Overview

The MAX6741XKYHD3 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 2.188V (VCC1) and 1.575V (VCC2), 150ms minimum reset timeout, 6µA supply current, and SC70-5 package - designed for power-supply sequencing in multivoltage portable systems.

For engineers reviewing the MAX6741XKYHD3 datasheet, MAX6741XKYHD3 pinout, MAX6741XKYHD3 application, or MAX6741XKYHD3 equivalent, this device delivers precise dual-rail monitoring with POK1-driven sequencing control, low-quiescent-current supervision, and guaranteed operation from -40°C to +85°C in space-constrained designs.

Technical Context

The MAX6741XKYHD3 integrates two independent voltage monitors (VCC1 and VCC2) with factory-set thresholds, a dedicated POK1 output that asserts high only after VCC1 exceeds its threshold for 37.5–75ms, and a push-pull RESET output that remains asserted low until both supplies stabilize for ≥150ms. It operates across 1.0–5.5V supply range with ±1.5% threshold accuracy over temperature.

Its supervisory logic includes automatic reset assertion on VCC1/VCC2 undervoltage, manual reset detect via internal 50kΩ pullup on RESET (no separate MR pin), and immunity to transients <35µs at 100mV overdrive. The POK1 function is fully decoupled from MR and VCC2 inputs, enabling deterministic sequencing control.

Key Specifications

Pinout & Package

MAX6741XKYHD3 is housed in a 5-pin SC70-5 package (1.6mm × 1.6mm × 0.9mm height) with gull-wing leads, rated for -40°C to +85°C operation and RoHS-compliant lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6741XKYHD3, MAX6741XKTJD3 supports higher-voltage systems but cannot supervise 2.2V/1.6V rails, while TPS3808G125DBVR offers lower IQ but omits dual monitoring and POK sequencing - making MAX6741XKYHD3 uniquely suited for compact, sequenced dual-rail portable designs.

Availability

MAX6741XKYHD3 is available at Aetrix Electronics and suitable for portable electronics, power-supply sequencing, and battery-powered embedded controllers requiring stable component supply and long-term manufacturability.

Supply support for MAX6741XKYHD3 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.

The MAX6736–MAX6745 family was engineered to replace discrete reset circuits in space- and power-constrained multivoltage systems, delivering integrated dual/triple supervision with sequencing-ready outputs like POK1.

FAQ

What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6741XKYHD3?

The MAX6741XKYHD3 has factory-trimmed reset thresholds of 2.188V for VCC1 and 1.575V for VCC2, with ±1.5% accuracy over the full -40°C to +85°C operating temperature range. These values are confirmed in Table 1 of the official datasheet and correspond to the "Y" and "V" suffix codes in the part number.

Does the MAX6741XKYHD3 include a manual reset input pin?

No, the MAX6741XKYHD3 does not have a dedicated MR pin. Instead, it implements manual reset detect on the RESET output using an internal 50kΩ pullup to VCC1 - allowing direct connection to a momentary switch without external components, as described in the Functional Diagram and Figure 2 of the datasheet.

What is the purpose and timing behavior of the POK1 output on the MAX6741XKYHD3?

The POK1 output on the MAX6741XKYHD3 is an open-drain, active-high signal that goes high only after VCC1 exceeds its 2.188V threshold for 37.5–75ms. It remains independent of VCC2 and MR status, enabling reliable enablement of downstream power stages - such as a VCC2 DC/DC converter - in strict sequencing applications.

Can the MAX6741XKYHD3 monitor voltages below 1.0V on either supply rail?

No - the MAX6741XKYHD3 specifies a minimum operating voltage of 1.0V for VCC1 and 0.9V for VCC2 per Absolute Maximum Ratings and Electrical Characteristics tables. While RSTIN-capable variants (e.g., MAX6738) support down to 0.488V via external divider, MAX6741XKYHD3 lacks RSTIN and is limited to its two factory-set rails.

What package type and dimensions does the MAX6741XKYHD3 use?

The MAX6741XKYHD3 uses a 5-pin SC70-5 package measuring 1.6mm × 1.6mm × 0.9mm with gull-wing leads. This footprint is 30% smaller than standard SOT23-5 and is fully compatible with automated assembly processes, as documented in the Pin Configurations section of the datasheet.