Analog Devices Inc./Maxim Integrated MAX16135GQS/V+T

Overview

MAX16135GQS/V+T from Analog Devices is a quad-input, automotive-grade voltage supervisor IC that monitors four independent supply rails (IN1–IN4) for undervoltage and overvoltage window faults with ±1% threshold accuracy over -40°C to +125°C. It features dual active-low open-drain reset outputs (RESET1, RESET2), 23 factory-programmable reset timeout periods (including 560ms for suffix T), and operates from 1.71V to 5.5V VDD. It is AEC-Q100 qualified and used in ADAS domain controllers to ensure safe power sequencing and fault detection.

For engineers reviewing the MAX16135GQS/V+T datasheet, MAX16135GQS/V+T pinout, MAX16135GQS/V+T application, or MAX16135GQS/V+T equivalent, key selection criteria include its quad-input window monitoring architecture, dual-reset logic grouping (IN1/IN2 → RESET1; IN3/IN4 → RESET2), factory-trimmed ±4% to ±11% tolerance with 0.25%/0.5% hysteresis, guaranteed reset state down to VDD = 1.07V, and SOT23-8 package compatibility with automotive thermal and reliability requirements.

Technical Context

The MAX16135GQS/V+T implements a quad-input window supervision architecture where each input pair shares a reset output: RESET1 asserts when either IN1 or IN2 falls outside its factory-set UV/OV window; RESET2 asserts when either IN3 or IN4 falls outside its window. All inputs support factory-programmable nominal voltages (1.0V–5.0V) and tolerance (±4% to ±11%), with ±1% total threshold accuracy over temperature.

It uses internal precision voltage references and comparator-based window detection with hysteresis (0.25% or 0.5% of VIN_NOM) to reject short transients. The reset timeout period is shared across both outputs and fixed at 560ms (suffix T), with propagation delay under 15μs and supply current as low as 5μA (typical) during non-reset operation.

Key Specifications

Pinout & Package

MAX16135GQS/V+T is housed in an 8-pin SOT23 package (package code K8+5A, outline 21-0078), optimized for space-constrained automotive PCB layouts and qualified for -40°C to +125°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX16134GQS/V+T and TPS3808G33DBVR, the MAX16135GQS/V+T uniquely delivers quad-input window supervision with dual grouped resets in an AEC-Q100-qualified SOT23-8 package - essential for space-constrained, safety-critical ADAS systems needing coordinated multi-rail fault response without external logic.

Availability

MAX16135GQS/V+T is available at Aetrix Electronics and suitable for ADAS domain controllers, multivoltage ASIC power sequencing, automotive infotainment head units, and server storage controllers requiring stable component supply, long-term automotive lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for MAX16135GQS/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 semiconductors, serving automotive, industrial, communications, and healthcare markets.

The MAX16132–MAX16135 family is designed specifically for automotive power integrity assurance, delivering precision window supervision across single- to quad-rail systems with AEC-Q100 qualification and extended temperature operation.

FAQ

What is the reset timeout period for MAX16135GQS/V+T?

The MAX16135GQS/V+T has a factory-programmed reset timeout period of 560ms, indicated by the suffix 'T' in its part number. This timeout applies identically to both RESET1 and RESET2 outputs and is guaranteed minimum duration after input voltages return within their UV/OV window thresholds. The value is fixed at wafer trim and cannot be adjusted externally.

How are the input thresholds configured on MAX16135GQS/V+T?

The input thresholds for MAX16135GQS/V+T are factory-programmed during manufacturing - no external resistors or configuration pins are required. For this specific variant (GQS), IN1–IN4 nominal voltages and tolerance levels (±4% to ±11%) are set per the ordering matrix; the 'G' suffix indicates ±7% tolerance with 0.5% hysteresis, and 'QS' maps to quad-input nominal voltage options (e.g., 3.3V/1.8V/1.2V/1.0V).

Does MAX16135GQS/V+T support overvoltage detection?

Yes, MAX16135GQS/V+T provides full window supervision, detecting both undervoltage and overvoltage faults on all four inputs. Each input has independently programmable upper (OV) and lower (UV) thresholds defined as VIN_NOM × (1 ± TOL%), with ±1% total accuracy over temperature - critical for protecting sensitive automotive processors from overvoltage-induced damage.

What is the minimum VDD voltage required for valid reset output states on MAX16135GQS/V+T?

MAX16135GQS/V+T guarantees correct reset output logic state (active-low asserted or deasserted) down to VDD = 1.07V. This is enabled by an internal undervoltage lockout (UVLO) circuit with threshold between 1.35V and 1.65V, ensuring reliable behavior during brownout conditions common in automotive cold-crank scenarios.

Is MAX16135GQS/V+T AEC-Q100 qualified?

Yes, MAX16135GQS/V+T is AEC-Q100 qualified for automotive applications, as confirmed by the '/V' suffix in its part number and explicit listing in the Ordering Information table. It is specified for operation from -40°C to +125°C and undergoes stress testing per AEC-Q100 Rev H requirements for reliability in harsh automotive environments.