Analog Devices Inc./Maxim Integrated MAX6715AUTLTD3+T

Overview

MAX6715AUTLTD3+T from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit in SOT23-5 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. It supports telecom power systems requiring reliable brownout detection and orderly shutdown.

For engineers reviewing the MAX6715AUTLTD3+T datasheet, MAX6715AUTLTD3+T pinout, MAX6715AUTLTD3+T application, or MAX6715AUTLTD3+T equivalent, key selection criteria include dual-rail voltage monitoring range, 140ms reset timeout, SOT23-5 footprint compatibility, low 14µA typical supply current at 3.6V, and immunity to sub-20µs VCC transients.

Technical Context

The MAX6715AUTLTD3+T implements independent dual-voltage comparators with internal 20ppm/°C tempco and 0.5% hysteresis referenced to VTH typical, ensuring stable threshold behavior across -40°C to +125°C. Its reset logic asserts active-low RST when either VCC1 or VCC2 falls below its factory-set threshold (e.g., VTH1 = 2.925V typ, VTH2 = 1.110V typ for suffix 'T'), with propagation delay under 20µs.

It features no watchdog, manual-reset (MR), or power-fail inputs-confirmed by suffix 'T' in Reset Timeout Suffix Guide (D3 = 140ms) and absence of WDI/PFI/RSTIN pins in its 5-pin SOT23 configuration. The device uses push-pull RST output referenced to VCC1, delivering VOH ≥ 0.8×VCC1 and VOL ≤ 0.3V at ISINK = 500µA.

Key Specifications

Pinout & Package

SOT23-5 package (package code U5+1), 2.9mm × 1.6mm × 1.1mm body, thermal resistance θJA = 324.3°C/W (four-layer board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6715AUTLTD3+T, MAX6716AUTLTD3+T offers identical functionality and timing but differs only in internal output driver implementation (no design impact), while TPS3808G125DBVR provides higher threshold accuracy at the cost of losing dual-supply capability and manual reset-making it unsuitable for multivoltage systems requiring coordinated reset assertion.

Availability

MAX6715AUTLTD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and automotive infotainment systems requiring stable component supply with guaranteed long-term availability and AEC-Q100-aligned qualification.

Supply support for MAX6715AUTLTD3+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.

The MAX6715A–MAX6729A family delivers ultra-low-voltage dual/triple supervisory circuits optimized for multirail embedded systems where space, power, and reliability constrain traditional discrete supervision solutions.

FAQ

What is the exact reset timeout period of the MAX6715AUTLTD3+T?

The MAX6715AUTLTD3+T has a guaranteed minimum reset timeout period of 140ms, corresponding to the 'D3' suffix in its ordering code. This value is specified over the full -40°C to +125°C temperature range and is not affected by supply voltage variations between 0.8V and 5.5V. The actual timeout may extend up to 280ms depending on process variation, but system design must rely on the 140ms minimum guarantee. This timing ensures compliance with μP reset hold-time requirements during power-up and brownout recovery sequences.

Does the MAX6715AUTLTD3+T support monitoring a third voltage rail?

No, the MAX6715AUTLTD3+T does not support third-rail monitoring. It is a dual-supply supervisor with dedicated VCC1 and VCC2 inputs only. Models with RSTIN capability (e.g., MAX6719A) require different suffixes and pinouts (6- or 8-pin SOT23). The MAX6715AUTLTD3+T's 5-pin SOT23 package lacks the RSTIN terminal, and its internal circuitry contains no adjustable comparator for auxiliary voltage monitoring. For triple-voltage supervision, engineers must select a variant such as MAX6719AUTTWD3+T.

What are the absolute maximum ratings for VCC1 and VCC2 on the MAX6715AUTLTD3+T?

The MAX6715AUTLTD3+T has absolute maximum ratings of -0.3V to +6V for both VCC1 and VCC2 terminals. However, functional operation is guaranteed only within 0.8V to 5.5V per the Electrical Characteristics table. Operation below 0.8V invalidates reset output logic state guarantees, though the device remains undamaged. Exceeding +6V on either supply risks permanent damage due to junction breakdown. These limits apply regardless of whether the other supply is present or absent, and thermal derating begins above +70°C ambient per the 3.9mW/°C specification for the SOT23-5 package.

Is the MAX6715AUTLTD3+T watchdog-capable?

No, the MAX6715AUTLTD3+T does not include a watchdog timer. Its suffix 'T' corresponds to the Reset Timeout Suffix Guide entry D3 (140ms), with no WDI pin assigned in the 5-pin SOT23 configuration. Watchdog functionality is exclusive to variants with 'W' or 'WD' in their ordering codes (e.g., MAX6721A) and requires at least a 6-pin package to accommodate the WDI terminal. The MAX6715AUTLTD3+T provides only voltage monitoring, manual reset, and fixed-timing reset assertion-making it suitable for systems where software-level watchdog supervision is handled separately.

What is the reset output type and drive strength of the MAX6715AUTLTD3+T?

The MAX6715AUTLTD3+T features a push-pull active-low RST output referenced to VCC1. It delivers VOH ≥ 0.8×VCC1 when deasserted (e.g., 2.64V min at VCC1 = 3.3V, ISOURCE = 200µA) and VOL ≤ 0.3V when asserted (at ISINK = 500µA, VCC1 ≥ 1.8V). This eliminates need for external pullup resistors and ensures clean logic transitions into CMOS inputs. Drive strength is sufficient to directly interface with μP reset pins rated for 1mA sink current, supporting robust noise immunity in electrically noisy industrial environments.