Analog Devices Inc./Maxim Integrated MAX6352SVUK+

Overview

MAX6352SVUK+ from Maxim Integrated is a dual-voltage microprocessor supervisory IC with open-drain active-low reset output referenced to VCC1, factory-set VCC1 threshold of 2.93V and VCC2 threshold of 1.58V, 20µA supply current, and guaranteed RESET validity down to VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - used in multivoltage embedded systems requiring reliable power-on and brownout detection.

For engineers reviewing the MAX6352SVUK+ datasheet, MAX6352SVUK+ pinout, MAX6352SVUK+ application, or MAX6352SVUK+ equivalent, this page delivers verified functional identity, exact voltage thresholds, reset timing behavior, SOT23-5 package mapping, and validated alternative options for dual-supply monitoring in industrial controllers and portable equipment.

Technical Context

The MAX6352SVUK+ monitors two independent supply rails (VCC1 and VCC2) and asserts its open-drain RST output when either falls below its precision factory-trimmed threshold - 2.93V for VCC1 and 1.58V for VCC2. It guarantees valid reset assertion as long as at least one supply remains ≥1.0V, enabling robust operation during asymmetric brownouts.

No watchdog timer or third-voltage monitor is included; it lacks WDI and RSTIN pins and is not part of the MAX6358–MAX6360 or MAX6355–MAX6357 subfamilies. Its reset timeout period is fixed at 100ms minimum, with no programmable delay or hysteresis adjustment.

Key Specifications

Pinout & Package

MAX6352SVUK+ is housed in a 5-pin SOT23-5 package with gull-wing leads, 1.6mm × 2.8mm body size, and 0.95mm pitch - compatible with standard reflow profiles and high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6352SVUK+, MAX6353SVUK+ simplifies layout by eliminating the pull-up resistor but sacrifices bus-sharing flexibility, while TLV803EB29DBZR reduces footprint and cost at the expense of losing VCC2 monitoring - making MAX6352SVUK+ the only option that natively satisfies dual-rail detection with open-drain interoperability.

Availability

MAX6352SVUK+ is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, automotive body control modules, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6352SVUK+ 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 industrial, automotive, communications, and computing applications.

The MAX6351–MAX6360 family delivers integrated dual- and triple-voltage supervision for multirail embedded systems - targeting reliability-critical applications where discrete solutions increase board area, cost, and failure risk.

FAQ

What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6352SVUK+?

The MAX6352SVUK+ has a factory-set VCC1 threshold of 2.93V (±0.05V over -40°C to +85°C) and a VCC2 threshold of 1.58V (±0.05V over the same range). These values are confirmed in the Voltage Threshold Levels table and Electrical Characteristics section of the official MAX6351–MAX6360 datasheet - no configuration or external components are needed to achieve these precise trip points.

Does the MAX6352SVUK+ include a watchdog timer or third-voltage monitor?

No, the MAX6352SVUK+ does not include a watchdog timer or third-voltage monitor. It belongs to the base dual-supply subgroup (MAX6352/MAX6355/MAX6358) and contains only VCC1 and VCC2 monitoring with open-drain RST output. Watchdog functionality is exclusive to MAX6358–MAX6360, and RSTIN-based third-voltage monitoring is limited to MAX6355–MAX6357 - neither feature is present in MAX6352SVUK+.

What is the function of Pin 1 (RST) on the MAX6352SVUK+ and how should it be connected?

Pin 1 of the MAX6352SVUK+ is an active-low open-drain reset output. It must be pulled up externally - typically with a 10kΩ resistor to the target logic rail (e.g., VCC of the µP) - to generate a valid HIGH level. When asserted, it pulls low to signal reset; when inactive, it floats, allowing other devices on the same reset bus to drive the line. This configuration supports wired-OR reset architectures common in multichip systems.

Can the MAX6352SVUK+ operate with VCC1 and VCC2 supplied from different voltage sources?

Yes, the MAX6352SVUK+ is explicitly designed to monitor two independent supplies: VCC1 powers the internal circuitry and defines the RST output reference, while VCC2 is a separate monitored rail with its own 1.58V threshold. The datasheet confirms VCC2 may be lower than VCC1 (e.g., 1.58V rail monitored against 2.93V rail), and operation is guaranteed as long as at least one supply remains ≥1.0V - enabling flexible multivoltage system supervision.

What is the minimum reset pulse width guaranteed by the MAX6352SVUK+?

The MAX6352SVUK+ guarantees a minimum reset pulse width of 100ms after power-on or manual reset assertion. This value is specified in the Electrical Characteristics table under "Reset Timeout Period (tRP)" and is valid over the full -40°C to +85°C operating range. The pulse width is internally generated and requires no external timing components - ensuring µP reset compliance without design overhead.