Analog Devices Inc./Maxim Integrated MAX6348XR41-T

Overview

MAX6348XR41-T from Maxim Integrated is an open-drain, active-low microprocessor supervisory circuit designed to monitor 4.1V power supplies in embedded systems. It asserts reset when VCC falls below 4.100V (±2.5% over temperature), holds reset for ≥100ms after VCC recovery, draws ≤1µA supply current at 3V, operates from 1.2V to 5.5V, and is qualified for -40°C to +85°C industrial use.

For engineers reviewing the MAX6348XR41-T datasheet, MAX6348XR41-T pinout, MAX6348XR41-T application, or MAX6348XR41-T equivalent, key selection criteria include its factory-trimmed 4.1V reset threshold, SC70-3 open-drain output, ultra-low quiescent current, transient immunity, and compatibility with bidirectional µP reset pins.

Technical Context

The MAX6348XR41-T implements a precision bandgap-based voltage comparator with 40ppm/°C tempco and 9.5mV hysteresis to detect VCC drops below its 4.1V threshold. Its internal timing circuit guarantees a minimum 100ms reset timeout after power-up or brownout recovery.

Designed for direct interface with microcontrollers having bidirectional reset pins (e.g., Motorola 68HC11), the open-drain RESET output requires only a single external pull-up resistor. The device ignores fast negative-going VCC transients up to durations defined by its reset threshold overdrive curve.

Key Specifications

Pinout & Package

MAX6348XR41-T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm, 0.65mm pitch), optimized for high-density portable designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor supervisory applications.

Compared with MAX6348XR41-T, the MAX6348UR41-T offers identical supervision functionality in a physically larger SOT23-3 package, while the TPS3808G33DBVR provides lower cost for 3.3V systems but cannot replace the 4.1V threshold or open-drain capability required in this design.

Availability

MAX6348XR41-T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical devices, automotive body control modules, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6348XR41-T 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, mixed-signal, and power management ICs for industrial, automotive, and computing applications.

The MAX63xx family delivers ultra-low-power, factory-trimmed supervisory circuits targeting space-constrained, battery-sensitive embedded systems requiring reliable power-on reset and brownout protection.

FAQ

What is the exact reset threshold voltage of the MAX6348XR41-T?

The MAX6348XR41-T has a factory-trimmed nominal reset threshold of 4.100V at +25°C, with tolerance of ±1.5% at room temperature and ±2.5% over the full -40°C to +85°C operating range. This value is confirmed in Table 1 of the official datasheet and corresponds to the "R41" suffix in the part number.

Does the MAX6348XR41-T have a push-pull or open-drain RESET output?

The MAX6348XR41-T features an open-drain RESET output, as explicitly stated in the General Description and Pin Description sections. This distinguishes it from the push-pull variants (e.g., MAX6346) and enables direct interfacing with bidirectional µP reset pins using only an external pull-up resistor.

What package type does the MAX6348XR41-T use, and what are its dimensions?

The MAX6348XR41-T is supplied in a 3-pin SC70-3 package, measuring 2.0mm × 2.1mm with 0.65mm lead pitch. This information is documented in the Ordering Information table and Package Information section, and the land pattern number is 90-0208.

What is the maximum supply current specification for the MAX6348XR41-T?

The MAX6348XR41-T draws a maximum supply current of 1.0µA at VCC = 3.0V (for thresholds ≤2.93V) or VCC = 3.2V (for thresholds >2.93V), per the Electrical Characteristics table. At 5.5V, the max is 1.75µA - both values are guaranteed over temperature.

Is the MAX6348XR41-T compatible with bidirectional microprocessor reset pins?

Yes, the MAX6348XR41-T is specifically designed for this use case. Its open-drain RESET output allows seamless integration with µPs like the Motorola 68HC11 that feature bidirectional reset pins, as illustrated in Figure 1 of the datasheet - only a single external pull-up resistor is required.