Analog Devices Inc./Maxim Integrated MAX16135HRR/V+T

Overview

MAX16135HRR/V+T from Analog Devices is a quad-voltage microprocessor supervisor IC designed for automotive ADAS systems. It monitors four independent supply rails (IN1–IN4) for undervoltage and overvoltage faults within ±1% threshold accuracy over –40°C to +125°C, features dual active-low open-drain reset outputs (RESET1/RESET2), and supports factory-programmable input thresholds from 1.0V to 5.0V with ±4% to ±11% window tolerance and 23 selectable reset timeout periods up to 1200ms.

For engineers reviewing the MAX16135HRR/V+T datasheet, MAX16135HRR/V+T pinout, MAX16135HRR/V+T application, or MAX16135HRR/V+T equivalent, this device is selected for functional-safety-critical multivoltage monitoring in automotive ADAS ECUs where precise windowed fault detection, guaranteed reset state down to VDD = 1.07V, and AEC-Q100 qualification are required.

Technical Context

The MAX16135HRR/V+T implements a quad-input window-monitoring architecture with two independent reset channels: RESET1 asserts when IN1 or IN2 falls outside its programmed UV/OV window; RESET2 asserts when IN3 or IN4 falls outside its programmed UV/OV window. All inputs use factory-trimmed voltage references with ±1% accuracy over temperature and support 0.25% or 0.50% hysteresis.

It operates from 1.71V to 5.5V VDD, draws only 5–30μA supply current, and guarantees correct reset logic state as low as VDD = 1.07V. The 8-pin SOT23 package integrates all monitoring, timing, and output logic without external components beyond pull-up resistors on open-drain reset lines.

Key Specifications

Pinout & Package

MAX16135HRR/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 reflow soldering at +260°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX16135HRR+T, the /V version adds AEC-Q100 qualification essential for automotive deployment; compared with TPS3808G33DBVR, MAX16135HRR/V+T delivers true quad-rail window supervision with dual reset outputs in one package - eliminating board space, BOM count, and timing coordination overhead.

Availability

MAX16135HRR/V+T is available at Aetrix Electronics and suitable for ADAS ECU development, multivoltage ASIC power sequencing, and automotive storage equipment requiring stable component supply with full automotive qualification and long-term lifecycle support.

Supply support for MAX16135HRR/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 with precision, reliability, and functional safety focus.

The MAX16132–MAX16135 family was engineered specifically for automotive ADAS and high-reliability multivoltage systems, delivering ±1% window supervision, AEC-Q100 qualification, and integrated quad-input monitoring in miniature SOT23 packaging.

FAQ

What is the function of the /V suffix in MAX16135HRR/V+T?

The /V suffix indicates AEC-Q100 qualification for automotive applications, confirming that MAX16135HRR/V+T has passed stress testing for temperature cycling, humidity, mechanical shock, and other conditions defined in AEC-Q100 Rev H. This qualification is mandatory for use in production automotive ECUs and distinguishes it from non-/V variants like MAX16135HRR+T, which lack automotive validation despite identical electrical performance.

How does the dual-reset architecture of MAX16135HRR/V+T work?

MAX16135HRR/V+T uses logical OR grouping: RESET1 asserts when either IN1 or IN2 falls outside its programmed undervoltage/overvoltage window, and RESET2 asserts when either IN3 or IN4 falls outside its window. Each reset output maintains its assertion for the full factory-set timeout period after the corresponding input(s) return to the valid window, enabling independent fault handling for two distinct voltage domain groups.

Can unused inputs on MAX16135HRR/V+T be left floating?

No - unused inputs on MAX16135HRR/V+T must be connected to their nominal voltage setting (e.g., tie IN2 to 1.8V if only IN1 is active), not left floating. Floating inputs may cause unpredictable comparator behavior and false resets. The datasheet explicitly requires connection to the programmed nominal voltage to ensure stable operation and avoid noise-induced faults.

What is the minimum VDD voltage required for MAX16135HRR/V+T to guarantee correct reset output logic state?

MAX16135HRR/V+T guarantees correct reset output logic state (i.e., RESET1 and RESET2 remain asserted during undervoltage conditions) down to VDD = 1.07V. Below this voltage, the internal UVLO circuit ensures outputs stay in known safe state, preventing spurious deassertion during brown-out events - a critical feature for fail-safe automotive boot sequences.

Does MAX16135HRR/V+T support overvoltage detection on all four inputs?

Yes - MAX16135HRR/V+T performs simultaneous undervoltage and overvoltage window monitoring on all four inputs (IN1–IN4). Each input's threshold is defined by its nominal voltage and ±tolerance (e.g., ±10%), so both UV and OV boundaries are enforced per channel. This dual-fault detection is factory-programmed and requires no external components or configuration.