Analog Devices Inc./Maxim Integrated MAX6407BS26-T

Overview

MAX6407BS26-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 electronics. It features a factory-trimmed 2.63V 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 MP3 players and PDAs to trigger system reset during brownout conditions.

For engineers reviewing the MAX6407BS26-T datasheet, MAX6407BS26-T pinout, MAX6407BS26-T application, or MAX6407BS26-T equivalent, key selection criteria include its active-high push-pull output logic, 2.63V detection threshold, immunity to sub-100ns VCC transients, UCSP-4 package compatibility, and support for single-supply operation from 1.2V to 5.5V.

Technical Context

The MAX6407BS26-T employs a precision bandgap reference comparator with internal trimming to achieve ±2.5% threshold accuracy across temperature. Its push-pull output drives high when VCC falls below 2.63V and low otherwise, eliminating need for external pull-up resistors.

It integrates a manual reset input with 50kΩ internal pull-up and 1µs minimum pulse width requirement. Propagation delay is 42µs (VCC falling) and startup time is 88µs, optimized for fast, reliable power-fail detection in low-voltage embedded systems.

Key Specifications

Pinout & Package

Package: UCSP-4 (4-bump, 2mm × 2mm chip-scale package), bottom-side solder bumps, compatible with standard reflow processes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6406BS26-T and TPS3126E18DBVR, the MAX6407BS26-T uniquely combines active-high push-pull output, 500nA current, and integrated manual reset in a 2mm × 2mm UCSP-enabling compact, low-power, service-ready designs without external components.

Availability

MAX6407BS26-T is available at Aetrix Electronics and suitable for MP3 players, PDAs, and wearable health monitors requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.

Supply support for MAX6407BS26-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 U.S.-based semiconductor company specializing in high-performance analog and mixed-signal ICs for power, sensing, and interface applications.

The MAX6406–MAX6411 family was designed specifically for ultra-low-power voltage monitoring in space-constrained portable equipment, emphasizing minimal external components, guaranteed low-VCC operation, and factory-trimmed accuracy.

FAQ

What is the exact reset threshold voltage of the MAX6407BS26-T?

The MAX6407BS26-T has a factory-trimmed nominal reset threshold of 2.63V, with guaranteed tolerance of ±2.5% over the full operating temperature range (–40°C to +85°C). At +25°C, the typical threshold is 2.63V, and the min/max values are 2.564V and 2.692V respectively per Table 1 in the datasheet.

Does the MAX6407BS26-T require external components to operate?

No, the MAX6407BS26-T requires no external components. It integrates a precision bandgap reference, comparator, push-pull output driver, and 50kΩ internal pull-up on the MR pin. Only VCC, GND, and optional MR pull-down switch are needed for basic operation.

Can the MAX6407BS26-T operate reliably below 1.8V?

Yes, the MAX6407BS26-T is fully specified down to VCC = 1.2V and guaranteed to maintain correct output logic state down to VCC = 1.0V. This enables reliable brownout detection even as primary batteries approach end-of-life.

What is the function of the MR pin on the MAX6407BS26-T?

The MR (Manual Reset) pin on the MAX6407BS26-T is an active-low input with internal 50kΩ pull-up to VCC. Pulling MR low forces the OUT pin high regardless of VCC level. It remains asserted while MR is low, supporting field service reset and test-mode entry without software involvement.

Is the MAX6407BS26-T pin-compatible with other members of the MAX6406–MAX6411 family?

Yes, all MAX6406–MAX6411 variants-including MAX6407BS26-T-share identical UCSP-4 pinout (GND, VCC, OUT, MR) and footprint. However, output logic (active-high vs. active-low) and threshold voltage differ between part numbers, so functional substitution requires verification of reset polarity and voltage requirements.