Analog Devices Inc./Maxim Integrated MAX6719UTTZD1+T

Overview

MAX6719UTTZD1+T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (primary), VCC2 (secondary), and RSTIN (adjustable third supply) with factory-trimmed thresholds of 4.625V and 3.075V, 1.1ms minimum reset timeout, and guaranteed reset validity down to VCC1 or VCC2 = 0.8V - used in multivoltage telecom power systems for reliable brownout detection and system initialization.

For engineers reviewing the MAX6719UTTZD1+T datasheet, MAX6719UTTZD1+T pinout, MAX6719UTTZD1+T application, or MAX6719UTTZD1+T equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% over temperature), ultra-low 14µA typical supply current at 3.6V, RSTIN adjustable monitoring down to 0.626V, and open-drain active-low RST output compatible with bidirectional µP reset I/O.

Technical Context

The MAX6719UTTZD1+T implements independent voltage comparators for VCC1 and VCC2 with 20ppm/°C tempco and 0.5% hysteresis, plus a high-impedance RSTIN input referenced to a 626.5mV internal bandgap. It asserts an open-drain active-low RST output when any monitored supply falls below its threshold and holds reset for a minimum 1.1ms timeout after recovery.

It features manual reset (MR) with 50kΩ internal pullup and 200ns MR-to-reset delay, immunity to sub-20µs VCC transients, and guaranteed operation across -40°C to +85°C with no external components required for basic supervision - all integrated into a 6-pin SOT23 footprint.

Key Specifications

Pinout & Package

MAX6719UTTZD1+T is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), surface-mount, lead-free (+T suffix), with gull-wing leads and standard JEDEC MO-178AC footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6720UTTZD1+T, MAX6719UTTZD1+T offers safer integration with bidirectional µP reset pins; compared with TPS3808G33DBVR, it delivers essential triple-rail coverage for complex SoC power domains - making it the only option meeting both functional and interface requirements in multivoltage embedded designs.

Availability

MAX6719UTTZD1+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and portable medical devices requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for MAX6719UTTZD1+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, automotive, and communications markets.

The MAX6715–MAX6729 family was designed specifically for space-constrained multivoltage systems requiring precise, low-power, triple-rail supervision - targeting telecom equipment, servers, and portable electronics where reliability and footprint efficiency are critical.

FAQ

What is the exact reset threshold voltage for VCC1 and VCC2 on MAX6719UTTZD1+T?

The MAX6719UTTZD1+T has factory-trimmed reset thresholds of 4.625V for VCC1 and 3.075V for VCC2, with ±1.5% tolerance over the full -40°C to +85°C operating range. These values are encoded in the "TZ" suffix per Maxim's Reset Voltage Threshold Suffix Guide and verified in the Electrical Characteristics table on page 2 of the datasheet.

Does MAX6719UTTZD1+T support monitoring a third voltage, and how is it configured?

Yes, MAX6719UTTZD1+T supports third-voltage monitoring via the RSTIN pin, which references a precise 626.5mV internal bandgap. To monitor an external supply (e.g., 1.2V), connect a resistor divider so that RSTIN = 626.5mV when the target rail reaches its trip point - enabling accurate undervoltage detection without additional ICs.

What type of reset output does MAX6719UTTZD1+T provide, and what are its drive capabilities?

MAX6719UTTZD1+T provides an open-drain active-low RST output. It sinks ≥1.2mA at VCC ≥ 2.7V with VOL ≤ 0.3V, and exhibits ≤0.5µA leakage when deasserted. This configuration allows direct interfacing with bidirectional µP reset I/O pins and supports wired-OR reset bus architectures.

Can MAX6719UTTZD1+T operate reliably during deep brownout conditions?

Yes, MAX6719UTTZD1+T guarantees valid reset output logic state as long as either VCC1 or VCC2 remains above 0.8V - confirmed in Absolute Maximum Ratings and Detailed Description sections. This ensures deterministic reset assertion even during severe input rail collapse, critical for fail-safe embedded systems.

What is the minimum reset timeout period for MAX6719UTTZD1+T, and how is it selected?

The MAX6719UTTZD1+T has a minimum reset timeout period of 1.1ms, selected by the "D1" suffix in the part number per Maxim's Reset Timeout Period Suffix Guide. This value is production-tested and guaranteed across temperature, providing sufficient hold time for modern µP core initialization sequences.