Analog Devices Inc./Maxim Integrated MAX16062ATG+

Overview

The MAX16062ATG+ from Maxim Integrated is an octal-voltage microprocessor supervisor IC designed for multivoltage system monitoring in industrial and telecom equipment. It monitors eight independent supply rails (e.g., 3.3V, 2.5V, 1.8V, and adjustable down to 0.4V), provides eight open-drain voltage-monitor outputs with internal 30µA pullups, and delivers a shared active-low RESET output asserting on any undervoltage or manual reset event. Its 1% threshold accuracy over –40°C to +125°C supports high-reliability power sequencing in servers and networking gear.

For engineers reviewing the MAX16062ATG+ datasheet, MAX16062ATG+ pinout, MAX16062ATG+ application, or MAX16062ATG+ equivalent, key selection considerations include its 24-pin TQFN-EP (4mm × 4mm) package, capacitor-adjustable reset timeout (min 140ms), integrated watchdog timer (1.6s typ), margin enable function, and tolerance-selectable 5%/10% input thresholds.

Technical Context

The MAX16062ATG+ implements eight independent voltage comparators feeding open-drain outputs, plus a wired-OR logic circuit that drives the shared RESET output whenever any monitored rail falls below its threshold or MR is asserted. Its watchdog timer uses edge-triggered reset clearing and includes a 54s startup delay before first timeout detection.

Threshold selection is controlled by the TOL pin (GND = 5%, VCC = 10%), while the SRT pin accepts an external capacitor to scale reset timeout from 140ms minimum up to seconds. All OUT_ pins and RESET feature internal 30µA pullups, eliminating external resistors unless interfacing to non-VCC logic levels up to 5.5V.

Key Specifications

Pinout & Package

MAX16062ATG+ is housed in a 24-pin thin QFN package (4mm × 4mm) with exposed pad (EP), rated for –40°C to +125°C operation. The EP is internally connected to GND and must be soldered to PCB ground plane for thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS389008AQDGNRQ1 and ADM1266ACPZ, the MAX16062ATG+ offers unique balance of high channel count, analog adjustability (down to 0.4V), integrated watchdog, and zero-software operation - making it optimal for cost-sensitive, high-reliability embedded systems needing deterministic reset behavior without host dependency.

Availability

MAX16062ATG+ is available at Aetrix Electronics and suitable for server power sequencing, telecom line card monitoring, industrial PLC backplanes, and automotive ADAS domain controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX16062ATG+ 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, automotive, and communications applications.

The MAX16062ATG+ belongs to Maxim's µP supervisor product line, engineered specifically for high-accuracy, multirail power monitoring in thermally stressed, space-constrained systems where deterministic reset timing and fault isolation are critical.

FAQ

What is the minimum operating voltage for MAX16062ATG+ to assert RESET reliably?

The MAX16062ATG+ guarantees RESET assertion down to VCC = 1.0V, ensuring fail-safe behavior during severe brownout conditions. This specification is validated across –40°C to +125°C and applies even when monitored inputs remain above their thresholds - a critical capability for maintaining system integrity in unstable power environments. The internal circuitry remains functional and responsive at this low VCC level, allowing the MAX16062ATG+ to serve as a robust last-line-of-defense supervisor.

Can MAX16062ATG+ monitor a 0.85V supply rail?

Yes, the MAX16062ATG+ can monitor a 0.85V rail using one of its adjustable-input channels (e.g., IN5–IN8). With TOL = GND, the nominal threshold is 0.394V; applying a resistive divider (R1/R2 ≈ 1.15) scales the input so 0.85V at the divider output equals 0.394V at INx. The device's 1% accuracy and 0.5% hysteresis ensure stable detection, and the 0.4V minimum threshold spec confirms viability for sub-1V rails. Reference Figure 8 in the MAX16062ATG+ datasheet for exact resistor calculations.

How does the MARGIN pin function during production testing of a board using MAX16062ATG+?

The MARGIN pin on the MAX16062ATG+ is an active-low input that forces all eight OUTx outputs and the RESET output into a high-impedance (deasserted) state when pulled low - regardless of actual input voltages. During production margin testing, this allows engineers to temporarily disable supervision while sweeping supply voltages across tolerance limits, verifying system functionality at rail extremes without triggering spurious resets. The 50µs MARGIN delay time ensures clean, glitch-free deassertion synchronized to the internal logic clock.

Is the watchdog timer in MAX16062ATG+ enabled by default, and how is it disabled?

No, the watchdog timer in the MAX16062ATG+ is disabled by default and requires explicit enablement. It activates only when the WDI pin is actively driven with edges; leaving WDI unconnected disables it entirely via an internal 400nA detector circuit. To enable, connect WDI to a GPIO or clock source that toggles at least once every 1.6s. The 54s startup delay prevents timeout during boot, and the timer clears on any WDI edge or RESET assertion - ensuring robust, non-intrusive firmware health monitoring without configuration overhead.

What package type and thermal characteristics does MAX16062ATG+ use?

The MAX16062ATG+ uses a 24-pin thin QFN package (4mm × 4mm) with exposed pad (EP), designated TQFN-EP in Maxim's ordering nomenclature. The EP is internally connected to GND and must be soldered to the PCB ground plane to achieve specified thermal performance: junction-to-board resistance is minimized to support continuous operation at +125°C ambient. The package's 16.9mW/°C derating above +70°C and 1666mW max power dissipation at +70°C enable reliable deployment in thermally dense server and telecom modules.