Analog Devices Inc./Maxim Integrated MAX16150BUT+T

Overview

MAX16150BUT+T from Maxim Integrated is a nanoPower pushbutton on/off controller with integrated switch debouncer, latched output, and one-shot interrupt generator. It accepts ±60V pushbutton inputs, delivers 20mA latched output with <100mV drop, consumes ≤20nA standby current, and operates from +1.3V to +5.5V across –40°C to +125°C - enabling battery freshness sealing and ultra-low-power system power control in portable medical sensors.

For engineers reviewing the MAX16150BUT+T datasheet, MAX16150BUT+T pinout, MAX16150BUT+T application, or MAX16150BUT+T equivalent, key selection criteria include its 2s debounce/16s shutdown timing profile, SOT23-6 package compatibility, ±15kV HBM ESD protection at PB_IN, and ability to drive light loads directly without external MOSFETs.

Technical Context

The MAX16150BUT+T implements an asynchronous, hardware-based debounce engine with fixed 2s debounce time (tDB) and 16s shutdown period (tSO), where extended PB_IN closure beyond tSO triggers a 4× longer INT pulse (128ms nominal) but leaves OUT asserted - distinguishing it from MAX16150A. Its internal PB_IN pullup (1.2–2.0MΩ) and overvoltage clamping enable direct connection to mechanical switches in harsh environments.

Operation relies on two independent timing paths: one controlling OUT latching via tDB/tSO thresholds, and another generating INT pulses with programmable durations (32ms or 128ms depending on PB_IN hold time). The CLR input provides asynchronous reset with 2×tINT lockout window after OUT assertion, preventing spurious deassertion during interrupt processing.

Key Specifications

Pinout & Package

MAX16150BUT+T is housed in a 6-pin thin SOT23 package (package code U6+1), footprint-compatible with industry-standard 6-lead SOT-23 layouts and suitable for high-density PCB designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar pushbutton on/off controller applications.

Compared with MAX16150AUT+T, the MAX16150BUT+T trades board-area savings for standard SMT assembly and thermal performance; versus TPS3808G01DBVR, it delivers complete front-end switch management - eliminating external components needed for ESD, overvoltage, and timing - at the cost of higher ISB.

Availability

MAX16150BUT+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial handheld terminals, and disposable diagnostic kits requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for MAX16150BUT+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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, medical, and automotive applications.

The MAX16150 family targets ultra-low-power system power control - specifically engineered to replace discrete debounce + latch + interrupt circuits in battery-constrained, ESD-prone, and space-limited devices.

FAQ

What is the debounce timing configuration of the MAX16150BUT+T?

The MAX16150BUT+T features a fixed 2-second debounce time (tDB) and 16-second shutdown period (tSO). Unlike the MAX16150A variant, a PB_IN closure exceeding tSO generates an extended 128ms INT pulse but does not deassert the latched OUT signal - maintaining power-on state for sustained operation. This behavior is inherent to the MAX16150B part number and cannot be altered externally.

Can the MAX16150BUT+T directly power a microcontroller?

Yes, the MAX16150BUT+T can directly power low-current microcontrollers: its latched OUT pin supplies up to 20mA with less than 100mV voltage drop across the full +1.3V to +5.5V supply range. For MCUs drawing >20mA or requiring tighter voltage regulation, MAX16150BUT+T is typically used to enable an external LDO - leveraging OUT as a clean, debounced enable signal rather than a power rail.

Does the MAX16150BUT+T require external components for basic operation?

No external components are required for core functionality: MAX16150BUT+T integrates internal pullup on PB_IN, ESD protection, debounce logic, and latching. A 0.1μF ceramic capacitor between VCC and GND is recommended for supply decoupling, and pullup resistors on INT and CLR may be needed depending on host interface - but no external debounce RC network, MOSFETs, or voltage translators are necessary.

How does the CLR input behave during normal operation of the MAX16150BUT+T?

The CLR input on MAX16150BUT+T is asynchronous and active-low: pulling CLR low forces the latched OUT signal to deassert immediately, regardless of PB_IN state. However, after OUT asserts, CLR transitions are ignored for a lockout window equal to 2×tINT (64ms or 256ms depending on PB_IN duration) to prevent race conditions during interrupt servicing - ensuring reliable system-level control sequencing.

Is the MAX16150BUT+T compatible with 1.8V logic systems?

Yes, MAX16150BUT+T operates down to +1.3V supply voltage and specifies VIH = 80% VCC for PB_IN/CLR at VCC = 1.3V–2.7V, making it fully compatible with 1.8V logic domains. Its OUT pin sources/sinks 20mA with VOH = VCC − 0.02V at 1.3V, delivering ~1.28V high-level output - sufficient to drive 1.8V CMOS inputs with margin. INT is open-drain and level-agnostic when pulled to any valid rail.