Analog Devices Inc./Maxim Integrated MAX6411BS46-T

Overview

MAX6411BS46-T from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector IC designed for battery and power-supply monitoring in portable electronics. It features a factory-trimmed 4.63V threshold (±2.5% over −40°C to +85°C), 500nA supply current, guaranteed valid output down to VCC = 1.0V, and integrated manual reset input with 50kΩ internal pullup. It is used in Li+-based MP3 players to prevent system operation below safe battery voltage.

For engineers reviewing the MAX6411BS46-T datasheet, MAX6411BS46-T pinout, MAX6411BS46-T application, or MAX6411BS46-T equivalent, key selection considerations include its open-drain active-low reset output, 4.63V detection threshold with hysteresis, immunity to sub-100ns VCC transients, and UCSP-4 package compatibility with space-constrained handheld designs.

Technical Context

The MAX6411BS46-T employs a precision bandgap reference comparator architecture with factory-trimmed threshold accuracy. Its open-drain output requires an external pullup resistor and supports interfacing to logic supplies up to 5.5V, enabling flexible voltage domain isolation.

It incorporates a manual reset (MR) input with internal 50kΩ pullup and 1µs minimum pulse width requirement. The device guarantees correct output state down to VCC = 1.0V and rejects fast negative-going VCC transients via built-in glitch immunity-critical for noisy battery-powered environments.

Key Specifications

Pinout & Package

MAX6411BS46-T is housed in a 4-bump, 2mm × 2mm UCSP (Ultra Compact Silicon Package) - a chip-scale package with bottom-mounted solder bumps. This footprint is 70% smaller than SC70 and optimized for ultra-portable PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6409BS46-T and TLV809K46DBZR, the MAX6411BS46-T uniquely combines ultra-low ICC (500nA), open-drain flexibility, and integrated MR in the smallest possible footprint-making it optimal for next-generation wearables and hearing aids where every nA and mm² matters.

Availability

MAX6411BS46-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, Li+-based consumer audio devices, and handheld industrial data loggers requiring stable component supply and long-term lifecycle support.

Supply support for MAX6411BS46-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 supervision in space- and energy-constrained portable electronics, emphasizing minimal footprint, nanoscale current draw, and factory-trimmed accuracy without external components.

FAQ

What is the exact reset threshold voltage of the MAX6411BS46-T?

The MAX6411BS46-T has a nominal reset threshold of 4.63V, with guaranteed tolerance of ±2.5% over the full operating temperature range (−40°C to +85°C). This value is factory-trimmed and specified in Table 1 of the datasheet under suffix "46*". At +25°C, the typical threshold is 4.63V, with min/max of 4.514V and 4.746V respectively.

Does the MAX6411BS46-T require an external pullup resistor on the OUT pin?

Yes, the MAX6411BS46-T features an open-drain output and requires an external pullup resistor on the OUT pin to establish a valid logic-high level. The resistor value must be selected to ensure VOL ≤ 0.4V when sinking 1.6mA (per Electrical Characteristics), while also supporting all connected input leakage currents. Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements.

Can the MAX6411BS46-T operate reliably below 1.8V supply voltage?

Yes, the MAX6411BS46-T is fully specified to operate and assert a valid output down to VCC = 1.0V. Its internal bandgap reference and comparator remain functional across the entire 1.0V to 5.5V supply range, making it suitable for deep brown-out detection and ultra-low-voltage microcontroller reset applications where other supervisors fail.

What is the function of the MR pin on the MAX6411BS46-T?

The MR (Manual Reset) pin on the MAX6411BS46-T is an active-low input that forces the OUT pin low regardless of VCC level when asserted. It includes a 50kΩ internal pullup to VCC, so it may be left unconnected if unused. A momentary switch from MR to GND provides user-initiated system reset, and the minimum pulse width required is 1µs.

Is the MAX6411BS46-T RoHS-compliant and lead-free?

Yes, the MAX6411BS46-T is RoHS-compliant and lead-free. Per Maxim's ordering information, the "+" suffix denotes RoHS/lead-free packaging; however, the "-T" suffix alone (as in MAX6411BS46-T) indicates tape-and-reel packaging and does not preclude RoHS compliance. Official materials analysis confirms lead-free construction per JEDEC J-STD-609, and the device meets EU RoHS Directive 2011/65/EU requirements.