Analog Devices Inc./Maxim Integrated MAX6408BS22+T

Overview

MAX6408BS22+T from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector with a factory-trimmed 2.20V threshold (±2.5% over –40°C to +85°C), 500nA supply current, and operation down to VCC = 1.0V. It monitors battery or regulated supply rails in portable electronics, asserting OUT low when VCC falls below threshold and supporting manual reset via MR pin.

For engineers reviewing the MAX6408BS22+T datasheet, MAX6408BS22+T pinout, MAX6408BS22+T application, or MAX6408BS22+T equivalent, key selection criteria include its 2.20V detection accuracy, UCSP-4 package footprint, immunity to sub-100ns VCC transients, compatibility with 1.0–5.5V supply ranges, and open-drain output requiring external pull-up for logic-level interfacing.

Technical Context

The MAX6408BS22+T integrates a precision bandgap reference and comparator trimmed to 2.20V nominal threshold, with hysteresis of 6.3mV and ±40ppm/°C tempco. Its internal 50kΩ MR pull-up enables direct switch-to-GND manual reset without external components.

Designed for battery-critical systems, it guarantees valid output state down to VCC = 1.0V and rejects fast negative-going VCC transients - e.g., up to ~150µs at 10mV overdrive, per typical operating characteristics. The open-drain OUT sinks up to 1.6mA while asserted and exhibits <0.1µA leakage when deasserted.

Key Specifications

Pinout & Package

MAX6408BS22+T is housed in a 4-bump, 2mm × 2mm UCSP (Ultra-Compact Silicon Package) with bottom-side solder bumps. This chip-scale package delivers 70% area reduction versus SC70 and is optimized for space-constrained portable PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB22DBZR and APX803S-22SA-7, the MAX6408BS22+T uniquely combines 4-bump UCSP miniaturization, integrated MR, and industry-leading 500nA supply current - making it optimal for handheld, wearable, and serviceable portable equipment where board area, battery life, and field reset capability are jointly critical.

Availability

MAX6408BS22+T is available at Aetrix Electronics and suitable for portable electronics, battery-powered medical devices, and industrial handheld terminals requiring stable component supply, long-term lifecycle support, and tape-and-reel delivery for automated assembly.

Supply support for MAX6408BS22+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 family was designed specifically for ultra-low-power voltage monitoring in space- and energy-constrained portable systems, emphasizing minimal footprint, nanoscale current draw, and factory-trimmed accuracy without external components.

FAQ

What is the exact factory-trimmed threshold voltage for MAX6408BS22+T?

The MAX6408BS22+T has a nominal reset threshold of 2.20V, with tolerance of ±2.5% over the full temperature range (–40°C to +85°C). At +25°C, the threshold is specified as 2.167V (min) to 2.233V (max), per Table 1 in the datasheet. This value is laser-trimmed at wafer test and does not require external calibration.

Does MAX6408BS22+T support manual reset, and how is it implemented?

Yes, MAX6408BS22+T includes an active-low manual reset (MR) input with an internal 50kΩ pull-up resistor to VCC. To assert reset, drive MR low via a momentary switch to GND or compatible logic signal. The device holds OUT low as long as MR remains low, independent of VCC level - a feature confirmed in the Electrical Characteristics table and Detailed Description section.

What package type and dimensions does MAX6408BS22+T use?

MAX6408BS22+T uses a 4-bump UCSP (Ultra-Compact Silicon Package) measuring 2.0mm × 2.0mm with bottom-side solder bumps. This chip-scale package is documented in the Package Information section and Pin Configuration diagram, and is distinct from leaded packages like SOT-23 or SC70.

Can MAX6408BS22+T operate reliably below 2.2V, and down to what supply voltage?

Yes, MAX6408BS22+T is fully functional and guarantees correct output logic state down to VCC = 1.0V, as stated in the General Description and Absolute Maximum Ratings. This enables brown-out detection during deep battery discharge while maintaining reset integrity - a key differentiator versus many competing detectors rated only to 1.6V or higher.

Is the output of MAX6408BS22+T push-pull or open-drain, and what design implications does that have?

The MAX6408BS22+T features an active-low open-drain output (OUT), as explicitly defined in the Selector Guide and Pin Description. This requires an external pull-up resistor to set the high-level voltage, enabling level translation, wired-OR configurations, and compatibility with mixed-voltage systems - unlike push-pull variants such as MAX6406BS22+T.