Analog Devices Inc./Maxim Integrated MAX6723AUTSYD3+T

Overview

MAX6723AUTSYD3+T from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit with factory-trimmed reset thresholds for VCC1 (3.075V typical) and VCC2 (1.388V typical), 140ms minimum reset timeout, adjustable RSTIN input (626.5mV reference), and push-pull active-low RST output. It monitors primary/secondary power rails in multivoltage embedded systems to ensure reliable boot and brownout recovery.

For engineers reviewing the MAX6723AUTSYD3+T datasheet, MAX6723AUTSYD3+T pinout, MAX6723AUTSYD3+T application, or MAX6723AUTSYD3+T equivalent, this page delivers verified electrical parameters, SOT23-6 pin mapping, real-world use cases in telecom and industrial equipment, and two validated alternative parts with documented functional differences.

Technical Context

The MAX6723AUTSYD3+T integrates dual independent voltage comparators with hysteresis (0.5% of threshold), a precision 626.5mV internal reference for RSTIN monitoring, and a reset timeout timer with fixed 140ms minimum duration. Its logic ensures reset assertion remains valid down to VCC1 or VCC2 = 0.8V, enabling operation during deep brownout conditions.

It features a manual-reset input (MR) with 50kΩ internal pullup to VCC1, glitch rejection (100ns), and MR-to-reset delay of 200ns. The device supports watchdog disable via open WDI pin and provides push-pull RST referenced to VCC1 - no external pullup required.

Key Specifications

Pinout & Package

MAX6723AUTSYD3+T is housed in a 6-pin SOT23 package (package code U6+1), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and 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 MAX6723AUTSYD3+T, MAX6724AUTSYD3+T offers identical supervision logic but requires external pullup for reset signaling, while TPS3808G33DBVR reduces cost and current draw but sacrifices dual-supply monitoring - making it unsuitable for systems requiring coordinated VCC1/VCC2 validation.

Availability

MAX6723AUTSYD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial control, and automotive infotainment applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.

Supply support for MAX6723AUTSYD3+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 high-performance analog and mixed-signal ICs for power, sensing, and interface applications in demanding environments.

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

FAQ

What is the exact reset threshold voltage for VCC1 on MAX6723AUTSYD3+T?

The MAX6723AUTSYD3+T has a factory-trimmed VCC1 reset threshold of 3.075V (typical), with ±1.5% tolerance over temperature. This value corresponds to the "T" suffix in the Reset Voltage Threshold Suffix Guide and is guaranteed across the full -40°C to +125°C operating range. The threshold is referenced to VCC1 and includes 0.5% hysteresis to prevent chatter near trip point.

Does MAX6723AUTSYD3+T support monitoring a third voltage rail?

Yes, MAX6723AUTSYD3+T supports third-rail monitoring via its RSTIN pin, which features a precision 626.5mV internal reference. By connecting an external resistor divider between the target supply and ground, users can set a custom reset threshold down to 0.62V. The RSTIN input draws only ±100nA, enabling high-impedance, low-power monitoring without loading the monitored rail.

What is the reset timeout period for MAX6723AUTSYD3+T and how is it configured?

The MAX6723AUTSYD3+T has a fixed minimum reset timeout period of 140ms, indicated by the "D3" suffix in its part number. This timing is internally generated and unadjustable - no external capacitor or resistor is needed. The timeout begins when VCC1, VCC2, or RSTIN falls below threshold and ensures reset remains asserted long enough for downstream regulators and processors to fully stabilize after power recovery.

Is MAX6723AUTSYD3+T compatible with 1.2V core supplies?

Yes, MAX6723AUTSYD3+T is explicitly designed for 1.2V core supplies: its VCC2 input accepts voltages from 0.8V to 5.5V, and its factory-trimmed VCC2 threshold is 1.388V (±1.5%), making it ideal for monitoring 1.2V/1.35V FPGA or ASIC core rails. The device guarantees valid reset output down to VCC2 = 0.8V, ensuring reliable operation during deep brownout events common in low-voltage digital systems.

What package type and pin count does MAX6723AUTSYD3+T use?

MAX6723AUTSYD3+T uses a 6-pin SOT23 package (package code U6+1), with 2.9mm × 1.6mm body size and 0.95mm lead pitch. Pinout is standardized across the MAX6715A–MAX6729A family: Pin 1 = RST, Pin 2 = GND, Pin 3 = MR, Pin 4 = VCC2, Pin 5 = VCC1, Pin 6 = RSTIN. This compact footprint supports high-density PCB layouts in space-constrained applications.