Analog Devices Inc./Maxim Integrated MAX16133BFM/V+T

Overview

MAX16133BFM/V+T from Analog Devices is a precision dual-voltage microprocessor supervisor IC designed for automotive ADAS systems. It monitors two independent supply rails (IN1 and IN2) for undervoltage and overvoltage window faults with ±1% threshold accuracy over temperature, factory-programmable nominal input voltages (1.0V–5.0V), and 23 selectable reset timeout periods up to 1200ms. Its active-low open-drain reset outputs (RESET1, RESET2) ensure reliable system initialization in multivoltage ASICs and storage equipment.

For engineers reviewing the MAX16133BFM/V+T datasheet, MAX16133BFM/V+T pinout, MAX16133BFM/V+T application, or MAX16133BFM/V+T equivalent, this device delivers critical functional safety support through guaranteed reset logic state down to VDD = 1.07V, immunity to short monitored-supply transients, and AEC-Q100 qualification for automotive-grade reliability.

Technical Context

The MAX16133BFM/V+T implements dual independent voltage monitoring channels with factory-trimmed window thresholds-each defined by programmable UV/OV tolerance (±4% to ±11%) and hysteresis (0.25% or 0.50%). Its internal voltage reference and comparator architecture ensures ±1% threshold accuracy across –40°C to +125°C, enabling precise fault detection in safety-critical ADAS power domains.

All reset outputs share a single factory-set timeout period (here: 560ms, per suffix 'T'), assert on threshold violation, and deassert only after the full timeout elapses once inputs return within the window. The device operates from 1.71V to 5.5V VDD and guarantees correct reset output logic state as long as VDD remains above 1.07V.

Key Specifications

Pinout & Package

MAX16133BFM/V+T is housed in an 8-pin SOT23 package (outline 21-0078, land pattern 90-0176), optimized for space-constrained automotive PCB layouts. Thermal resistance θ_JA = 196°C/W on a four-layer board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX16133BFM+T, the /V+T variant adds AEC-Q100 qualification and traceable automotive-grade screening; versus TPS3808G33DBVR, it provides true dual-rail window supervision with programmable thresholds and longer timeout flexibility essential for ADAS boot integrity.

Availability

MAX16133BFM/V+T is available at Aetrix Electronics and suitable for ADAS domain controllers, multivoltage ASICs, automotive storage equipment, and servers requiring stable component supply with automotive-grade reliability and long-term lifecycle support.

Supply support for MAX16133BFM/V+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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving automotive, industrial, communications, and consumer markets.

The MAX16132–MAX16135 family was engineered specifically for functional safety-critical automotive applications-delivering precision window supervision, AEC-Q100 qualification, and guaranteed operation across the full –40°C to +125°C range.

FAQ

What is the function of the /V suffix in MAX16133BFM/V+T?

The /V suffix indicates AEC-Q100 qualification for automotive applications. MAX16133BFM/V+T undergoes extended reliability testing-including high-temperature operating life, temperature cycling, and ESD validation-to meet Grade 0 (–40°C to +125°C) requirements. This certification is mandatory for deployment in ADAS and powertrain ECUs, and is absent in the non-/V variant MAX16133BFM+T.

How does the MAX16133BFM/V+T determine its reset timeout period?

The reset timeout period is factory-programmed and encoded in the part number suffix: 'T' corresponds to 560ms minimum timeout. All reset outputs (RESET1 and RESET2) share this identical timeout value. The device does not support runtime adjustment-the timeout is fixed at manufacture and verified per Table 9 in the datasheet.

Can unused input pins be left floating on the MAX16133BFM/V+T?

No. Unused input pins must be connected to their nominal voltage setting (e.g., tie IN2 to 1.8V if only monitoring IN1). Floating inputs may cause unpredictable comparator behavior and false resets. The datasheet explicitly requires connection to the programmed nominal voltage to maintain valid window threshold operation and avoid noise susceptibility.

What is the minimum VDD required for MAX16133BFM/V+T to guarantee correct reset output logic state?

MAX16133BFM/V+T guarantees correct reset output logic state (i.e., known high-impedance or asserted low) down to VDD = 1.07V. Below this level, the internal UVLO circuit holds outputs in a defined state, but the 1.07V threshold ensures deterministic behavior during brownout conditions-critical for fail-safe shutdown sequencing in automotive systems.

Does the MAX16133BFM/V+T support overvoltage detection on both inputs?

Yes. MAX16133BFM/V+T performs full window monitoring on both IN1 and IN2-detecting both undervoltage (UV) and overvoltage (OV) faults relative to their respective factory-programmed nominal voltages and tolerance bands. Each channel operates independently, and RESET1 asserts only on IN1 violations while RESET2 asserts only on IN2 violations.