Analog Devices Inc./Maxim Integrated MAX6829YDUT+

Overview

MAX6829YDUT+ from Maxim Integrated is a dual ultra-low-voltage microprocessor supervisory IC in 6-pin SOT23 package, monitoring primary VCC (2.12V–2.25V threshold) and secondary VCC2 (2.113V–2.263V threshold) supplies with manual reset input, watchdog timer (1.6s nominal timeout), and active-low push-pull RESET output. It guarantees valid reset assertion down to VCC = +1.0V and supports critical µP monitoring in battery-powered embedded systems.

For engineers reviewing the MAX6829YDUT+ datasheet, MAX6829YDUT+ pinout, MAX6829YDUT+ application, or MAX6829YDUT+ equivalent, this page delivers verified electrical parameters, exact pin functions, confirmed dual-supply monitoring behavior, factory-trimmed VCC2 threshold, and real-world selection guidance against comparable supervisors - all validated against Maxim's official Rev 3 datasheet (19-1867, 7/2014).

Technical Context

The MAX6829YDUT+ implements a dual-threshold supervision architecture: one factory-trimmed comparator monitors VCC against a Y-suffix threshold (2.12V–2.25V at -40°C to +85°C), while a second comparator monitors VCC2 against a Y-suffix secondary threshold (2.113V–2.263V over full temperature range). It integrates a 1.6s watchdog timer with edge-triggered clearing and a 140ms minimum reset timeout delay after supply recovery.

Its push-pull RESET output drives low during fault conditions (VCC/VCC2 undervoltage, MR assertion, or WDI timeout) and returns high after timeout; internal 50kΩ MR pullup enables direct switch-to-GND manual reset without external components. The device operates from VCC = +2.1V to +2.75V and draws ≤30µA at -40°C to +125°C.

Key Specifications

Pinout & Package

MAX6829YDUT+ uses a 6-pin SOT23 package (package code U6+1, outline 21-0058) with 1.0mm pitch, 2.9mm × 1.6mm footprint, and RoHS-compliant lead-free construction (+T suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6830YDUT+, MAX6829YDUT+ offers native active-low reset polarity matching most µPs, while TPS3808G18DBVR lacks VCC2 supervision and watchdog - making MAX6829YDUT+ the only option fulfilling full dual-rail, watchdog, and push-pull active-low requirements in SOT23-6.

Availability

MAX6829YDUT+ is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded controllers, and intelligent instruments requiring stable component supply across industrial temperature ranges (-40°C to +125°C) and long-lifecycle production programs.

Supply support for MAX6829YDUT+ 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, medical, and communications applications.

The MAX6826–MAX6831 product line delivers ultra-low-voltage dual-supply microprocessor supervisors with integrated watchdog and manual reset - engineered specifically for space-constrained, battery-operated, and safety-critical embedded systems.

FAQ

What is the exact VCC reset threshold range for MAX6829YDUT+ over temperature?

The MAX6829YDUT+ has a VCC reset threshold of 2.12V (min) to 2.25V (max) at -40°C to +85°C, and 2.11V (min) to 2.26V (max) at -40°C to +125°C. These values are factory-trimmed and specified in the "VCC Reset Threshold" table of the MAX6826–MAX6831 datasheet Rev 3. The Y-suffix denotes this specific threshold grade, and MAX6829YDUT+ does not support user-adjustable VCC thresholds.

Does MAX6829YDUT+ monitor both VCC and VCC2, and what are their respective roles?

Yes, MAX6829YDUT+ monitors two independent supplies: VCC (pin 6) is the primary supply powering the IC and setting its main reset threshold (Y-suffix = 2.12V–2.25V), while VCC2 (pin 5) is the secondary supply monitored at a separate factory-trimmed threshold (2.113V–2.263V). Both must exceed their thresholds for RESET to deassert; failure of either triggers reset.

What type of RESET output does MAX6829YDUT+ provide, and how is it electrically configured?

MAX6829YDUT+ provides an active-low push-pull RESET output (pin 1). When asserted, it actively drives low (≤0.3V at 1.2mA sink); when deasserted, it actively drives high (≥0.8 × VCC at 200µA source). This eliminates the need for an external pullup resistor and ensures clean, fast edges compatible with standard µP reset inputs.

Can the watchdog timer in MAX6829YDUT+ be disabled, and how?

Yes, the watchdog timer in MAX6829YDUT+ is disabled by leaving the WDI pin (pin 4) unconnected or connecting it to a three-stated buffer output. Internally, an open WDI is driven low for 7/8 of the timeout period and high for 1/8, automatically clearing the timer every ~1.4s - effectively disabling watchdog functionality without software intervention.

Is MAX6829YDUT+ compatible with systems requiring reset assertion down to VCC = +1.0V?

Yes, MAX6829YDUT+ is guaranteed to assert a valid RESET output down to VCC = +1.0V across the full -40°C to +125°C temperature range. This is explicitly stated in the General Description and confirmed in the Absolute Maximum Ratings and Electrical Characteristics sections of the datasheet - enabling robust operation during severe brownout conditions.