Analog Devices Inc./Maxim Integrated MAX6406BS22+T

Overview

MAX6406BS22+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 2.20V threshold (±2.5% over -40°C to +85°C), active-low push-pull output, 500nA supply current at 3V, and operates down to VCC = 1.0V - ideal for Li-ion-powered MP3 players and pagers requiring reliable brownout detection.

For engineers reviewing the MAX6406BS22+T datasheet, MAX6406BS22+T pinout, MAX6406BS22+T application, or MAX6406BS22+T equivalent, key selection criteria include reset threshold accuracy, ultra-low ICC, UCSP-4 package footprint, manual reset input compatibility, and immunity to sub-100ns VCC transients.

Technical Context

The MAX6406BS22+T integrates a precision bandgap reference and comparator with internal trimming to deliver stable 2.20V detection across temperature. Its push-pull output drives logic directly without external pull-up resistors, and the MR input includes a 50kΩ internal pullup for simplified manual reset implementation.

Designed for single-supply operation from 1.2V to 5.5V, it guarantees valid output state down to VCC = 1.0V and rejects fast negative-going transients via built-in hysteresis (6.3mV typical) and propagation delay filtering - critical for noisy battery rails in handheld devices.

Key Specifications

Pinout & Package

MAX6406BS22+T is housed in a 4-bump UCSP (Ultra Compact Silicon Package) measuring 2mm × 2mm with bottom-mounted solder bumps. This chip-scale package reduces board area by 70% versus SC70 and targets space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB22DBZR and APX803S-22SA-7, the MAX6406BS22+T uniquely combines ultra-low 500nA current, integrated MR input, push-pull output, and UCSP-4 footprint - making it optimal for space- and power-constrained portable designs requiring full reset control.

Availability

MAX6406BS22+T is available at Aetrix Electronics and suitable for portable medical sensors, Li-ion battery-powered pagers, and handheld barcode scanners requiring stable component supply, long-term lifecycle support, and tape-and-reel delivery for automated assembly.

Supply support for MAX6406BS22+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 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 equipment - delivering precision thresholds, minimal ICC, and chip-scale packaging without external components.

FAQ

What is the exact reset threshold voltage of the MAX6406BS22+T?

The MAX6406BS22+T has a nominal reset threshold of 2.20V, with a guaranteed tolerance of ±2.5% over the full operating temperature range of -40°C to +85°C. At +25°C, the typical threshold is 2.200V, with min/max values of 2.167V and 2.233V respectively. This precision eliminates need for external calibration in battery-monitoring circuits.

Does the MAX6406BS22+T require external components to operate?

No, the MAX6406BS22+T requires no external components. It integrates a precision bandgap reference, trimmed comparator, internal 50kΩ MR pullup resistor, and push-pull output driver. The only connections needed are VCC, GND, MR (optional), and OUT - enabling a complete reset solution in a 2mm × 2mm UCSP-4 package.

What is the supply current consumption of the MAX6406BS22+T?

The MAX6406BS22+T draws just 500nA typical supply current at 3V and +25°C, rising to 1.0µA maximum over -40°C to +85°C. This ultra-low ICC enables multi-year operation in battery-backed systems such as real-time clocks, memory supervisors, and wearable health monitors where power budget is critical.

How does the manual reset (MR) input function on the MAX6406BS22+T?

The MR input on the MAX6406BS22+T is active-low with an internal 50kΩ pullup to VCC. Pulling MR below 0.2×VCC asserts the active-low OUT signal regardless of VCC level. When left unconnected, MR remains high and does not affect normal voltage-monitoring operation - enabling flexible reset architecture without added passives.

Is the MAX6406BS22+T compatible with 1.8V logic systems?

Yes, the MAX6406BS22+T is fully compatible with 1.8V logic. Its output VOH reaches ≥0.8×VCC when released, so at VCC = 1.8V, VOH ≥ 1.44V - exceeding standard 1.8V CMOS VIH (typically 0.7×VDD = 1.26V). VOL remains ≤0.4V under load, ensuring solid logic-low margin even at minimum VCC = 1.2V.