Analog Devices Inc./Maxim Integrated MAX6407BS31+T

Overview

The MAX6407BS31+T from Maxim Integrated is an ultra-low-power, active-high push-pull voltage detector optimized for battery and system supply monitoring in portable electronics. It features a factory-trimmed 3.08V threshold (±2.5% over –40°C to +85°C), 500nA supply current at 3V, manual reset input (MR), and guaranteed valid output down to VCC = 1.0V - used to assert system reset when main supply drops below threshold in MP3 players and PDAs.

For engineers reviewing the MAX6407BS31+T datasheet, MAX6407BS31+T pinout, MAX6407BS31+T application, or MAX6407BS31+T equivalent, key selection criteria include its active-high push-pull output logic, 3.08V trip point, UCSP-4 package footprint, immunity to sub-200ns VCC transients, and compatibility with 1.2V–5.5V operating range.

Technical Context

The MAX6407BS31+T implements a precision bandgap reference comparator with internal trimming to deliver stable 3.08V detection across temperature. Its active-high push-pull output drives high when VCC falls below VTH and remains valid down to 1.0V supply, enabling reliable reset assertion even during brownout conditions.

It integrates a manual reset input (MR) with internal 50kΩ pullup, supporting TTL/CMOS-compatible reset initiation. Propagation delay is 42µs (typical) for VCC falling edge, and the device rejects transients ≤100ns while maintaining immunity to fast supply glitches up to 200µs depending on overdrive.

Key Specifications

Pinout & Package

MAX6407BS31+T is housed in a 4-bump, 2mm × 2mm chip-scale package (UCSP-4), with bumps located on the bottom side of the die. The package is lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB30DBZR and APX803S-30SA-7, the MAX6407BS31+T delivers 99.97% lower supply current and native active-high push-pull drive - eliminating external components and simplifying µP interface in space-constrained, battery-critical designs.

Availability

MAX6407BS31+T is available at Aetrix Electronics and suitable for portable medical monitors, wireless headsets, and industrial handheld scanners requiring stable component supply, long-lifecycle availability, and consistent UCSP-4 packaging.

Supply support for MAX6407BS31+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 battery-operated portable equipment, delivering precision thresholds, minimal footprint, and guaranteed operation down to 1V supply.

FAQ

What is the exact reset threshold voltage of the MAX6407BS31+T?

The MAX6407BS31+T has a nominal reset threshold of 3.08V, with ±2.5% tolerance 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 "31". At +25°C, the typical threshold is 3.08V, with min/max bounds of 3.034V and 3.126V respectively.

Does the MAX6407BS31+T require external components to operate?

No, the MAX6407BS31+T requires no external components. It integrates a precision bandgap reference, comparator, push-pull output stage, and internal 50kΩ pullup on the MR pin. Only VCC, GND, MR (optional), and the load on OUT need connection - making it a true single-component solution for supply monitoring.

Can the MAX6407BS31+T operate reliably below 2.0V supply?

Yes, the MAX6407BS31+T guarantees valid output logic state down to VCC = 1.0V. Its internal circuitry remains functional and the OUT pin correctly asserts high when VCC drops below 3.08V, even at 1.2V supply - critical for detecting deep brownout in Li-ion or alkaline battery systems.

What is the propagation delay of the MAX6407BS31+T during VCC drop?

The MAX6407BS31+T exhibits a typical propagation delay of 42µs from VCC crossing the 3.08V threshold (falling edge) to full OUT assertion. This value is measured at VCC = 3.0V and TA = +25°C, with maximum delay specified at 100µs over temperature and process variation.

Is the MAX6407BS31+T pin-compatible with other devices in the MAX6406–MAX6411 family?

Yes, all MAX6406–MAX6411 variants, including the MAX6407BS31+T, share identical UCSP-4 pinout (GND/A1, VCC/A2, OUT/B1, MR/B2) and mechanical footprint. However, output logic (active-high vs. active-low) and threshold voltage differ - so electrical compatibility must be verified per application requirements.