Analog Devices Inc./Maxim Integrated MAX6411BS45+T

Overview

MAX6411BS45+T from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector with factory-trimmed 4.50V threshold, ±2.5% accuracy over -40°C to +85°C, 500nA supply current, and guaranteed valid output down to VCC = 1.0V - used for reliable power-on reset and brownout detection in battery-powered portable electronics.

For engineers reviewing the MAX6411BS45+T datasheet, MAX6411BS45+T pinout, MAX6411BS45+T application, or MAX6411BS45+T equivalent, key selection criteria include its 4.50V trip point, open-drain output architecture, UCSP-4 package compatibility, and immunity to sub-100ns VCC transients in space-constrained, low-quiescent-current designs.

Technical Context

The MAX6411BS45+T implements a precision bandgap reference comparator with hysteresis of 9.5mV and temperature coefficient of 40ppm/°C, enabling stable threshold detection across industrial temperature ranges. Its manual reset (MR) input features an internal 50kΩ pullup and supports TTL/CMOS logic drive.

As part of the MAX6406–MAX6411 family, it uses BiCMOS process technology (512 transistors) and is optimized for single-supply monitoring where VCC ranges from 1.2V to 5.5V. The open-drain output allows flexible interfacing with logic supplies up to 5.5V via external pullup.

Key Specifications

Pinout & Package

MAX6411BS45+T is housed in a 4-bump, 2mm × 2mm chip-scale package (UCSP-4), offering 70% smaller footprint than SC70 while maintaining solderable bump geometry compatible with standard SMT assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage detector applications.

Compared with TPS3808G33DBVR and APX803S-45SA-7, the MAX6411BS45+T uniquely combines 4.50V precision, 500nA current, open-drain output, and manual reset in a 2mm × 2mm UCSP - making it optimal for next-gen compact, long-life battery systems where all four attributes are concurrently required.

Availability

MAX6411BS45+T is available at Aetrix Electronics and suitable for portable medical sensors, smart wearables, industrial handheld terminals, and Li-ion battery-powered devices requiring stable component supply and long-term lifecycle support.

Supply support for MAX6411BS45+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.

The MAX6406–MAX6411 product line was designed specifically for ultra-low-power voltage monitoring in space-constrained portable electronics, emphasizing minimal BOM count, factory-trimmed accuracy, and robust transient immunity.

FAQ

What is the exact reset threshold voltage of the MAX6411BS45+T?

The MAX6411BS45+T has a factory-trimmed nominal reset threshold of 4.50V, with guaranteed tolerance of ±2.5% over the full operating temperature range (-40°C to +85°C). At +25°C, the typical threshold is 4.50V, and the min/max values are 4.387V and 4.612V respectively per Table 1 in the datasheet.

Does the MAX6411BS45+T require external components to operate?

No, the MAX6411BS45+T requires no external components for basic voltage detection functionality. Its precision bandgap reference and comparator are fully integrated and factory-trimmed. Only an external pullup resistor on the open-drain OUT pin is needed for logic-level definition - and the MR input has an internal 50kΩ pullup, eliminating another external part.

Can the MAX6411BS45+T operate with supply voltages below 2.0V?

Yes, the MAX6411BS45+T is fully specified to operate with VCC as low as 1.2V (minimum) and guarantees correct output logic state down to VCC = 1.0V. This enables reliable reset assertion during deep battery discharge in applications like coin-cell-powered sensors where voltage may fall below 1.5V.

What is the purpose of the MR pin on the MAX6411BS45+T?

The MR (Manual Reset) pin on the MAX6411BS45+T provides an active-low, asynchronous reset override. Pulling MR low forces the open-drain OUT pin to assert (low), regardless of VCC level. It features an internal 50kΩ pullup, so it can be left unconnected if unused - simplifying design and reducing component count in the MAX6411BS45+T implementation.

Is the MAX6411BS45+T pin-compatible with other devices in the MAX6406–MAX6411 family?

Yes, all MAX6406–MAX6411 variants, including the MAX6411BS45+T, share identical UCSP-4 pinout (GND, VCC, OUT, MR) and footprint. This allows direct substitution within the same threshold/output-type group (e.g., MAX6408/MAX6411) without PCB changes - though functional compatibility depends on matching output type (open-drain) and threshold voltage.