Analog Devices Inc./Maxim Integrated MAX6715AUTRVD3+T

Overview

MAX6715AUTRVD3+T from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (1.8V–5.0V) and VCC2 (0.9V–3.3V) with factory-trimmed reset thresholds, 140ms minimum reset timeout, and guaranteed reset validity down to VCC1 or VCC2 = 0.8V - used in telecom power sequencing and industrial embedded controllers.

For engineers reviewing the MAX6715AUTRVD3+T datasheet, MAX6715AUTRVD3+T pinout, MAX6715AUTRVD3+T application, or MAX6715AUTRVD3+T equivalent, key selection criteria include dual-rail threshold accuracy (±1.5% over -40°C to +125°C), low 14µA typical supply current at 3.6V, push-pull RST output referenced to VCC1, and immunity to sub-20µs VCC transients.

Technical Context

The MAX6715AUTRVD3+T integrates two independent voltage comparators with hysteresis (0.5% of VTH), a programmable reset timeout timer (140ms min), and a manual-reset input with internal 50kΩ pullup to VCC1. It asserts active-low RST when either VCC1 drops below its factory-trimmed threshold (e.g., 3.075V typ for 'T' suffix) or VCC2 falls below its corresponding threshold (e.g., 3.075V typ for 'T'), maintaining reset for the full timeout after recovery.

Its architecture supports system-level reliability via guaranteed reset assertion at VCC ≥ 0.8V, 20µs VCC-to-RST propagation delay, and open-drain/push-pull output flexibility. The device lacks watchdog, RSTIN, PFI/PFO, or active-high RST features - confirmed by suffix 'D3' (140ms timeout) and 'V' (VCC1/VCC2 dual-monitor only, no auxiliary inputs).

Key Specifications

Pinout & Package

SOT23-6 package (package code U6+1), 1.6mm × 2.9mm footprint, 1.1mm height, thermal resistance θJA = 115°C/W on multilayer board.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-supply supervisory applications.

Compared with MAX6715AUTRVD3+T, MAX6716AUTRVD3+T trades push-pull simplicity for bus flexibility, while TPS3808G33DBVR reduces cost and current but sacrifices dual-supply capability - making MAX6715AUTRVD3+T the only option for space-constrained, true dual-rail brownout protection.

Availability

MAX6715AUTRVD3+T is available at Aetrix Electronics and suitable for telecom power sequencing, industrial PLC I/O modules, and automotive infotainment head units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6715AUTRVD3+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

Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for demanding industrial, automotive, and communications applications, with emphasis on reliability and low-power operation.

The MAX6715A–MAX6729A family delivers ultra-low-voltage supervisory circuits optimized for multivoltage embedded systems where simultaneous monitoring of primary and secondary rails is critical to system integrity.

FAQ

What is the exact reset threshold voltage for MAX6715AUTRVD3+T on VCC1 and VCC2?

The MAX6715AUTRVD3+T uses the 'T' suffix, specifying a VCC1 reset threshold of 3.000V (min) to 3.150V (max), with 3.075V typical, and an identical VCC2 threshold range. These values are factory-trimmed and guaranteed over -40°C to +125°C with ±1.5% tolerance, as documented in the Electrical Characteristics table of the MAX6715A–MAX6729A datasheet.

Does MAX6715AUTRVD3+T support watchdog or power-fail monitoring functions?

No, MAX6715AUTRVD3+T does not include watchdog timer, RSTIN, PFI, or PFO functionality. Its suffix 'V' denotes dual-supply monitoring only (VCC1 and VCC2), and 'D3' specifies the 140ms reset timeout. Devices with watchdog (e.g., MAX6721A) or power-fail (e.g., MAX6728A) use different suffix codes and pinouts - MAX6715AUTRVD3+T is strictly a dual-threshold, fixed-timeout supervisor.

What is the function of Pin 6 (NC) on MAX6715AUTRVD3+T, and can it be connected?

Pin 6 on MAX6715AUTRVD3+T is a no-connect (NC) terminal - physically unbonded and electrically isolated. It must remain unconnected and unpopulated on the PCB; routing traces, applying solder mask openings, or attaching components to Pin 6 violates Maxim's layout guidelines and may compromise reliability or cause parametric failure.

How does the manual-reset (MR) input behave during power-up and brownout conditions?

The MR input on MAX6715AUTRVD3+T has an internal 50kΩ pullup to VCC1 and asserts reset when pulled low. During power-up, MR remains high until VCC1 reaches ~0.8V, ensuring reset is held until supply stabilization. If MR is pulsed low during brownout, reset remains asserted for the full 140ms timeout after MR returns high - even if VCC1/VCC2 recover mid-timer, the timeout completes uninterrupted.

Is MAX6715AUTRVD3+T compatible with 1.2V or 0.9V VCC2 supplies?

Yes, MAX6715AUTRVD3+T supports VCC2 supplies as low as 0.9V, with guaranteed reset validity down to VCC2 = 0.8V. However, the 'T'-suffix VCC2 threshold is 3.000V–3.150V - so a 0.9V VCC2 rail cannot trigger reset. To monitor sub-3V rails, select a variant with lower VCC2 suffix (e.g., 'E' = 0.810V–0.855V) or use the RSTIN input (not available on MAX6715AUTRVD3+T).