Analog Devices Inc./Maxim Integrated MAX6409BS46+T

Overview

The MAX6409BS46+T from Maxim Integrated is an ultra-low-power voltage detector IC designed for battery and power-supply monitoring in portable systems. It features a factory-trimmed 4.63V threshold (±2.5% over -40°C to +85°C), active-low push-pull output, 500nA supply current at 3V, manual reset input with internal 50kΩ pullup, and guaranteed valid output down to VCC = 1.0V. It is used in Li+-based handheld devices requiring precise brownout detection.

For engineers reviewing the MAX6409BS46+T datasheet, MAX6409BS46+T pinout, MAX6409BS46+T application, or MAX6409BS46+T equivalent, this page delivers verified electrical parameters, UCSP-4 package details, reset timing behavior, threshold accuracy, and real-world substitution guidance - all specific to the 4.63V active-low push-pull variant.

Technical Context

The MAX6409BS46+T implements a precision bandgap reference comparator with hysteresis of 9.5mV, enabling immunity to fast VCC transients up to ~100ns. Its propagation delay is 20–42µs during VCC falling edge (overdrive-dependent), and startup time is 88µs from VCC=0 to threshold.

It operates across VCC = 1.2V to 5.5V (–40°C to +85°C), with output logic guaranteed valid down to VCC = 1.0V. The MR input accepts TTL/CMOS levels and includes glitch rejection (100ns) and minimum pulse width (1µs) specifications.

Key Specifications

Pinout & Package

MAX6409BS46+T is housed in a 4-bump, 2mm × 2mm chip-scale package (UCSP-4), with bumps located on the bottom side. 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 TLV803EB33DBZR and TPS3808G33DBVR, the MAX6409BS46+T provides the exact 4.63V threshold, lowest ICC (500nA), and integrated MR - making it uniquely suitable for Li+-based 4.5V+ systems where power budget and reset control are critical.

Availability

MAX6409BS46+T is available at Aetrix Electronics and suitable for portable medical devices, battery-powered instrumentation, and USB-C peripheral designs requiring stable component supply with tight threshold accuracy and ultra-low power consumption.

Supply support for MAX6409BS46+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 space-constrained portable electronics, emphasizing minimal external components, sub-µA operation, and factory-trimmed precision thresholds.

FAQ

What is the exact reset threshold voltage of the MAX6409BS46+T?

The MAX6409BS46+T has a nominal reset threshold of 4.63V, with a guaranteed tolerance of ±2.5% over the full operating temperature range (–40°C to +85°C). This value is factory-trimmed and documented in Table 1 of the datasheet under suffix "46". At +25°C, the typical threshold is 4.63V, with min/max limits of 4.514V and 4.746V.

Does the MAX6409BS46+T support manual reset functionality?

Yes, the MAX6409BS46+T includes a dedicated MR (manual reset) input on pin B2. It is active-low, features an internal 50kΩ pullup to VCC, and requires a minimum 1µs low pulse to assert the output. The MR input accepts TTL/CMOS logic levels and provides 100ns glitch rejection - enabling robust reset initiation in noisy environments.

What is the supply current consumption of the MAX6409BS46+T?

The MAX6409BS46+T draws only 500nA typical supply current at VCC = 3V and +25°C. Over temperature (–40°C to +85°C), maximum supply current is 1.75µA at VCC = 5.5V. This ultra-low ICC enables multi-year operation in battery-powered applications such as wearables and remote sensors.

What package type does the MAX6409BS46+T use, and what are its dimensions?

The MAX6409BS46+T uses a 4-bump, 2mm × 2mm chip-scale package (UCSP-4), with solder bumps on the bottom side. It measures 45 mil × 45 mil (1.14mm × 1.14mm) and is lead-free and RoHS-compliant. The UCSP footprint is 70% smaller than SC70 packages, supporting high-density PCB layouts.

How does the MAX6409BS46+T behave when VCC drops below 1.0V?

The MAX6409BS46+T guarantees correct output logic state down to VCC = 1.0V - meaning OUT remains asserted (low) as long as VCC stays below the 4.63V threshold, even during deep brownout. Below 1.0V, device behavior is not specified; however, the output remains functional through the entire 1.2V–5.5V operating range.