Analog Devices Inc./Maxim Integrated MAX16138ATA01/VY+

Overview

MAX16138ATA01/VY+ from Analog Devices is a ±0.7% accurate single-window voltage supervisor IC that monitors a 0.85V system supply for undervoltage and overvoltage faults within a factory-set ±4% threshold window, features built-in self-test (BIST), latched OV output, and 100ms reset timeout - used in automotive ADAS power-rail monitoring to ensure safe processor reset sequencing.

For engineers reviewing the MAX16138ATA01/VY+ datasheet, MAX16138ATA01/VY+ pinout, MAX16138ATA01/VY+ application, or MAX16138ATA01/VY+ equivalent, key selection considerations include its AEC-Q100 qualification, side-wettable TDFN-8 package, ±0.5% hysteresis, 5µs overvoltage fault response, and BIST diagnostic capability for ASIL-compliant systems.

Technical Context

The MAX16138ATA01/VY+ implements a dual-comparator architecture with independent UV/OV detection paths, factory-trimmed thresholds centered at 0.85V ±4%, and internal hysteresis of ±0.5% to suppress noise-induced false triggering. Its BIST logic performs both power-up and on-demand diagnostics by injecting synthetic fault conditions and verifying RST/BIST response timing.

It supports two operational modes via NR pin: full-system reset during BIST (NR = low) or BIST-only reporting (NR = high). The open-drain RST, OV, and BIST outputs require external pull-ups; CLR/BIST serves as a dual-function input for OV latch clearing and BIST initiation with ≥150µs pulse width.

Key Specifications

Pinout & Package

MAX16138ATA01/VY+ is housed in a 2mm × 2mm, 8-pin TDFN side-wettable package (package code T822CY+2C), optimized for automated optical inspection (AOI) and solder joint reliability in automotive PCB assemblies.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV809EJDBZR and MAX6373KA26+T, the MAX16138ATA01/VY+ uniquely delivers AEC-Q100 qualification, ±0.7% window accuracy, integrated BIST, and side-wettable packaging - making it the only option meeting full ASIL-B functional safety requirements for 0.85V rail supervision.

Availability

MAX16138ATA01/VY+ is available at Aetrix Electronics and suitable for advanced driver-assistance systems (ADAS), automotive domain controllers, and telematics gateways requiring stable component supply, long-term automotive lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for MAX16138ATA01/VY+ 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 safety-certified solutions.

The MAX16138 belongs to Analog Devices' automotive-grade supervisory IC product line, designed specifically to meet ISO 26262 functional safety requirements for voltage monitoring in ADAS and zonal ECU architectures.

FAQ

What is the factory-set input threshold voltage for MAX16138ATA01/VY+?

The MAX16138ATA01/VY+ has a factory-set nominal input threshold voltage of 0.85V, with undervoltage and overvoltage trip points trimmed to ±4% around this value - resulting in a UV threshold of approximately 0.816V and an OV threshold of approximately 0.884V. This configuration is permanently laser-trimmed and cannot be adjusted externally. The 0.85V target aligns with common low-voltage I/O rails in automotive SoCs and sensors, and is documented in the Selector Guide Table on page 15 of the MAX16138 datasheet.

Does MAX16138ATA01/VY+ support both push-pull and open-drain RST outputs?

No, the MAX16138ATA01/VY+ features an open-drain RST output only, as confirmed by the Pin Description table (page 6) and Electrical Characteristics (page 4) of the datasheet. While the MAX16138 family offers push-pull variants, the ATA01/VY+ suffix denotes the open-drain configuration. It requires an external pull-up resistor to VDD - typically 10kΩ - and is compatible with standard CMOS or TTL logic interfaces. This design allows wired-OR reset bus configurations common in multi-rail automotive systems.

How does the Built-In Self-Test (BIST) function in MAX16138ATA01/VY+ verify internal health?

The MAX16138ATA01/VY+ executes BIST in two phases: first during power-up (after UVLO exit), then on-demand when CLR/BIST is held low ≥150µs. It internally generates synthetic UV and OV fault conditions and validates correct RST and BIST output responses within defined timing windows. If either response fails - e.g., RST doesn't assert or BIST doesn't go low - the BIST pin remains asserted low, signaling a detectable hardware fault. This dual-phase diagnostic meets ASIL-B decomposition requirements for voltage supervisors in ISO 26262 systems.

What is the purpose of the NR pin on MAX16138ATA01/VY+?

The NR (No Reset) pin on MAX16138ATA01/VY+ controls BIST behavior: when NR is logic low, on-demand BIST asserts RST during internal testing, forcing the system into reset - useful for pre-boot validation. When NR is logic high, BIST runs without disturbing RST, allowing diagnostics during normal operation. This dual-mode capability enables flexible safety verification strategies while maintaining system uptime. The NR pin is referenced in the Pin Description (page 6) and Detailed Description (page 9) of the datasheet.

Is MAX16138ATA01/VY+ qualified for automotive applications?

Yes, MAX16138ATA01/VY+ is AEC-Q100 qualified for Grade 0 (-40°C to +125°C), as explicitly stated in the Ordering Information table (page 16) and Benefits and Features list (page 2). The "/V" in the part number denotes automotive qualification, "/Y" indicates side-wettable packaging for enhanced solder joint inspection, and "+" confirms RoHS compliance. Its design includes BIST, latched OV, and ±0.7% accuracy - all aligned with functional safety requirements for ADAS and domain controller applications per ISO 26262.