Analog Devices Inc./Maxim Integrated MAX6716UTRVD3-T

Overview

MAX6716UTRVD3-T from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in 6-pin SOT23 package, monitoring VCC1 (4.625V threshold) and VCC2 (3.075V threshold) with 210ms minimum reset timeout, push-pull active-low RST output, and manual reset input - used to ensure reliable boot and brownout recovery in multivoltage embedded systems.

For engineers reviewing the MAX6716UTRVD3-T datasheet, MAX6716UTRVD3-T pinout, MAX6716UTRVD3-T application, or MAX6716UTRVD3-T equivalent, key selection criteria include guaranteed reset validity down to VCC1/VCC2 = 0.8V, 14µA typical supply current at 3.6V, immunity to short VCC transients, and compatibility with bidirectional µP reset I/O via 4.7kΩ series resistor.

Technical Context

The MAX6716UTRVD3-T implements dual independent voltage comparators with factory-trimmed thresholds (VTH1 = 4.625V, VTH2 = 3.075V), a digital reset timeout timer (210ms min), and push-pull RST output referenced to VCC1. It asserts reset when either supply falls below its threshold and holds reset for the full timeout after both supplies recover.

It features an internal 50kΩ pullup on MR, supports manual reset pulse widths ≥1µs, and guarantees correct reset logic state as long as VCC1 or VCC2 remains >0.8V - enabling robust operation during deep brownouts without external biasing.

Key Specifications

Pinout & Package

MAX6716UTRVD3-T is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), surface-mount, RoHS-compliant, with gull-wing leads and thermal pad option per variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6716UTRVD3-T, MAX6316MUT48D3-T omits VCC2 monitoring entirely, while TPS3808G33DBVR trades dual-threshold flexibility and MR support for lower quiescent current and open-drain simplicity - making MAX6716UTRVD3-T optimal for multivoltage industrial designs requiring guaranteed 0.8V operation and push-pull drive.

Availability

MAX6716UTRVD3-T is available at Aetrix Electronics and suitable for computers/servers, telecom/networking equipment, and industrial PLCs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6716UTRVD3-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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.

The MAX6715–MAX6729 family delivers ultra-low-voltage dual/triple supervisory circuits optimized for multirail embedded systems where reliability, small footprint, and brownout resilience are critical - targeting applications from base stations to portable medical devices.

FAQ

What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6716UTRVD3-T?

The MAX6716UTRVD3-T has factory-trimmed reset thresholds of 4.625V (±125mV) for VCC1 and 3.075V (±75mV) for VCC2, as defined by the "RV" suffix in the part number per Maxim's Reset Voltage Threshold Suffix Guide. These values are measured under standard conditions (TA = +25°C, VCC1/VCC2 ≥ 0.8V) and remain stable across -40°C to +85°C with 20ppm/°C tempco.

Does the MAX6716UTRVD3-T support manual reset, and what are the electrical requirements?

Yes, the MAX6716UTRVD3-T includes an active-low manual reset input (MR) with internal 50kΩ pullup to VCC1. It accepts logic-low pulses ≥1µs wide and rejects glitches <100ns. MR can be driven by TTL/CMOS logic, open-drain outputs, or a momentary switch to GND - no external components required for basic operation.

What is the function of Pin 6 (NC) on the MAX6716UTRVD3-T, and how should it be handled in layout?

Pin 6 on the MAX6716UTRVD3-T is a no-connect (NC) terminal - internally unconnected and unused. Per Maxim's design guidance, it must be left floating or tied to GND in PCB layout; connecting it to VCC1 or other signals may cause undefined behavior. No thermal or electrical function is assigned to this pin.

How does the MAX6716UTRVD3-T guarantee valid reset output when VCC drops below 1.0V?

The MAX6716UTRVD3-T guarantees correct reset logic state (RST = low when asserted) down to VCC1 or VCC2 = 0.8V - verified across temperature and process corners. This is achieved through internal biasing and comparator design that maintains functionality below typical CMOS logic thresholds, eliminating need for external pull-down resistors in most implementations.

Is the MAX6716UTRVD3-T compatible with bidirectional microprocessor reset pins, and how is interfacing achieved?

Yes, the MAX6716UTRVD3-T's push-pull RST output can interface with bidirectional µP reset I/O by adding a 4.7kΩ series resistor between RST and the µP pin. This prevents contention during µP-driven reset assertion while allowing the supervisor to reliably force reset - a method validated in Maxim's Application Note 2325 Figure 4.