Analog Devices Inc./Maxim Integrated MAX6407BS26

Overview

MAX6407BS26 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 2.63V 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 - enabling reliable brownout detection in Li-ion-powered MP3 players and PDAs.

For engineers reviewing the MAX6407BS26 datasheet, MAX6407BS26 pinout, MAX6407BS26 application, or MAX6407BS26 equivalent, this device supports critical low-voltage supervision where minimal quiescent current, precise trip accuracy, and MR-initiated system reset are required in space-constrained UCSP-4 designs.

Technical Context

The MAX6407BS26 uses a precision bandgap reference comparator with internal trimming to deliver stable 2.63V detection across temperature. Its push-pull output asserts logic high when VCC falls below threshold and remains valid down to 1.0V, eliminating need for external pull-ups or level-shifting.

It incorporates a dedicated manual reset input (MR) with internal 50kΩ pull-up, supporting TTL/CMOS-compatible reset initiation. The device rejects fast VCC transients up to 100ns and provides 6.3mV hysteresis to prevent chatter during slow-rising/falling supply conditions.

Key Specifications

Pinout & Package

MAX6407BS26 is housed in a 4-bump, 2mm × 2mm chip-scale package (UCSP-4), optimized for ultra-compact PCB layouts in portable electronics. The package has no leads and mounts via solder bumps on bottom side.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6406BS26 and TPS3808G26DBVR, MAX6407BS26 delivers optimal fit for space- and current-constrained designs needing simple, active-high reset without added complexity or overhead.

Availability

MAX6407BS26 is available at Aetrix Electronics and suitable for portable/battery-powered equipment, MP3 players, and PDAs requiring stable component supply with long-term manufacturability and RoHS-compliant sourcing.

Supply support for MAX6407BS26 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 engineered specifically for ultra-low-power voltage supervision in battery-critical portable devices, emphasizing sub-1µA operation, factory-trimmed accuracy, and minimal board space via UCSP packaging.

FAQ

What is the exact reset threshold voltage of MAX6407BS26 and its tolerance over temperature?

The MAX6407BS26 has a nominal reset threshold of 2.63V, with a guaranteed range of 2.564V to 2.692V over the full operating temperature range of –40°C to +85°C. This ±2.5% accuracy is factory-trimmed and specified in the Electrical Characteristics table of the official datasheet, ensuring consistent brownout behavior across environmental conditions without external calibration.

Does MAX6407BS26 require external components to operate?

No, MAX6407BS26 requires no external components. It integrates a precision bandgap reference, comparator, push-pull output driver, and internal 50kΩ pull-up resistor on the MR pin. This allows direct connection to VCC, GND, a momentary switch on MR, and a microcontroller reset pin - eliminating resistors, capacitors, or zener diodes typically needed in discrete supervisor circuits.

Can MAX6407BS26 function reliably when VCC drops below 1.5V?

Yes, MAX6407BS26 guarantees correct output logic state down to VCC = 1.0V. Its internal circuitry remains fully operational and asserts the active-high OUT signal as long as VCC stays below 2.63V, even at 1.0V - making it suitable for deep brownout detection in systems using aging batteries or low-voltage energy harvesting sources.

What is the purpose of the MR pin on MAX6407BS26 and how should it be used?

The MR (Manual Reset) pin on MAX6407BS26 is an active-low input that forces the OUT pin high regardless of VCC level when pulled low. It features an internal 50kΩ pull-up to VCC, so it may be left unconnected if unused. For manual reset, connect a normally open momentary switch between MR and GND; no external pull-up or debouncing capacitor is required unless operating in high-noise environments.

Is MAX6407BS26 compatible with standard pick-and-place assembly processes?

Yes, MAX6407BS26 uses Maxim's UCSP-4 package (2mm × 2mm, 4-bump), which is qualified for standard surface-mount assembly including reflow soldering at peak temperatures up to +235°C. The package drawing (21-0117G) and assembly guidelines are published in Maxim's UCSP Reliability Notice, confirming compatibility with automated manufacturing for high-volume portable electronics production.