Analog Devices Inc./Maxim Integrated MAX6407BS22-T

Overview

MAX6407BS22-T from Maxim Integrated is an ultra-low-power, active-high push-pull voltage detector IC designed for battery and power-supply monitoring in portable systems. It features a factory-trimmed 2.20V threshold (±2.5% over –40°C to +85°C), 500nA supply current, manual reset input (MR), and guaranteed valid output down to VCC = 1.0V. It is used in Li+-powered MP3 players to trigger controlled shutdown before brownout.

For engineers reviewing the MAX6407BS22-T datasheet, MAX6407BS22-T pinout, MAX6407BS22-T application, or MAX6407BS22-T equivalent, key selection criteria include reset threshold accuracy, ultra-low ICC, active-high push-pull logic compatibility with µP reset inputs, immunity to VCC transients, and UCSP-4 package constraints for space-constrained PCB layouts.

Technical Context

The MAX6407BS22-T implements a precision bandgap reference comparator with internal trimming for fixed 2.20V detection. Its push-pull output asserts high when VCC falls below threshold and remains valid down to 1.0V, enabling reliable reset assertion even during deep discharge.

It includes a manually controllable MR input with internal 50kΩ pullup and 1µs minimum pulse width requirement. The device rejects fast VCC transients via built-in hysteresis (6.3mV typical) and is immune to glitches ≤100ns, ensuring robust operation in noisy battery-powered environments.

Key Specifications

Pinout & Package

MAX6407BS22-T is housed in a 4-bump UCSP (Ultra Compact Silicon Package), 2mm × 2mm, bottom-terminal chip-scale package. This leadless, die-level封装 requires careful PCB pad design and reflow profiling per Maxim's UCSP reliability guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6406BS22-T and TPS3808G12DBVR, the MAX6407BS22-T uniquely combines active-high logic, 500nA ICC, MR support, and validated UCSP-4 integration-making it optimal for compact, battery-critical designs requiring direct µP interface and field-serviceable reset.

Availability

MAX6407BS22-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, medical wearables, and industrial handheld scanners requiring stable component supply and long-term lifecycle support.

Supply support for MAX6407BS22-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-constrained portable electronics, emphasizing minimal footprint (UCSP-4), nanoscale current draw, and factory-trimmed accuracy without external components.

FAQ

What is the exact reset threshold voltage of the MAX6407BS22-T?

The MAX6407BS22-T has a nominal reset threshold of 2.20V, with a tolerance of ±2.5% over the full operating temperature range of –40°C to +85°C. At +25°C, the threshold is specified as 2.200V (min 2.167V, max 2.233V). This value is factory-trimmed and does not require external calibration. The MAX6407BS22-T achieves this precision using an internal bandgap reference and laser trimming during production.

Does the MAX6407BS22-T support manual reset, and how is it implemented?

Yes, the MAX6407BS22-T includes a dedicated MR (manual reset) input on pin B2. It is active-low with an internal 50kΩ pullup resistor to VCC, allowing it to be left unconnected if unused. To assert reset, drive MR low for ≥1µs with a momentary switch to GND or compatible logic. The MAX6407BS22-T holds OUT high for the duration of the MR low pulse, independent of VCC level-enabling reliable system reset initiation under any supply condition.

What is the supply current consumption of the MAX6407BS22-T, and how does it vary with voltage?

The MAX6407BS22-T draws only 500nA typical supply current (ICC) at VCC = 3V and +25°C. Over temperature (–40°C to +85°C), ICC remains ≤1.0µA. At VCC = 5.5V, ICC rises to 1.0–1.75µA maximum. This ultra-low ICC enables multi-year operation on small batteries. The MAX6407BS22-T maintains consistent performance across its 1.0V–5.5V operating range, making it suitable for both low-voltage coin cells and higher-voltage rails.

Can the MAX6407BS22-T operate reliably when VCC drops below 2.0V?

Yes-the MAX6407BS22-T guarantees valid output logic states down to VCC = 1.0V. Its push-pull output continues to drive high (VOH ≥ 0.8×VCC) and sink current (VOL ≤ 0.4V) even at 1.2V supply, ensuring robust reset signaling during deep battery discharge. This capability is explicitly characterized and guaranteed in the datasheet, distinguishing the MAX6407BS22-T from many competing supervisors that fail below 1.6V.

What package type and dimensions does the MAX6407BS22-T use, and what assembly considerations apply?

The MAX6407BS22-T uses a 4-bump UCSP (Ultra Compact Silicon Package), measuring 2.0mm × 2.0mm with bottom-mounted solder bumps. It is not a conventional leaded package-assembly requires precise stencil design, controlled reflow profile, and adherence to Maxim's UCSP reliability guidelines (e.g., board material selection, pad geometry, and mechanical stress mitigation). The MAX6407BS22-T's UCSP-4 footprint replaces larger SC70 packages with 70% area reduction, but demands qualified CSP assembly partners.