Analog Devices Inc./Maxim Integrated MAX6352SVUK-T

Overview

MAX6352SVUK-T from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in 5-pin SOT23 package, monitoring VCC1 and VCC2 with factory-set thresholds of 2.93V and 1.58V respectively, featuring active-low open-drain reset output, debounced manual-reset input, 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-T datasheet, MAX6352SVUK-T pinout, MAX6352SVUK-T application, or MAX6352SVUK-T equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% over temperature), ultra-low 20µA supply current, 100ms minimum reset pulse width, and open-drain RST output compatibility with mixed-voltage logic interfaces.

Technical Context

The MAX6352SVUK-T implements independent precision voltage comparators for two supply rails, asserting reset when either VCC1 falls below 2.93V or VCC2 falls below 1.58V, with hysteresis of VTH/500 and tempco of 20ppm/°C. Its open-drain RST output supports external pull-up to any logic rail up to 6V.

No watchdog timer or third-voltage monitor is integrated - this variant excludes WDI and RSTIN functions, distinguishing it from MAX6358–MAX6360 and MAX6355–MAX6357 families. It operates across -40°C to +85°C with full electrical specifications guaranteed.

Key Specifications

Pinout & Package

MAX6352SVUK-T uses a 5-pin SOT23 package (U5-1 outline, land pattern 90-0174) with exposed pad not connected. Pin 1 is RST (active-low open-drain), Pin 2 is GND, Pin 3 is MR (manual reset input), Pin 4 is VCC2, and Pin 5 is VCC1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6352SVUK-T, MAX6352UVUK-T offers identical functionality with adjusted VCC1 threshold for tighter margin applications, while TPS3808G18DBVR provides lower-cost single-rail supervision but cannot replace dual-threshold coordination or shared reset assertion logic.

Availability

MAX6352SVUK-T is available at Aetrix Electronics and suitable for computers, portable/battery-powered equipment, and multivoltage systems requiring stable component supply, long-term industrial lifecycle support, and RoHS-compliant packaging.

Supply support for MAX6352SVUK-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 semiconductor solutions for industrial, computing, and communications markets.

The MAX6351–MAX6360 family delivers precision dual/triple-supply supervision with factory-trimmed thresholds, targeting multivoltage embedded systems where reliability, low power, and small footprint are critical.

FAQ

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

The MAX6352SVUK-T has a factory-trimmed VCC1 threshold of 2.93V (±1.5%) and VCC2 threshold of 1.58V (±1.5%), as defined by the "SV" suffix per the Voltage Threshold Levels table. These values are fully guaranteed over -40°C to +85°C and enable precise supervision of +3.0V and +1.6V rails without external calibration.

Does the MAX6352SVUK-T include a watchdog timer function?

No, the MAX6352SVUK-T does not include a watchdog timer. Watchdog functionality is exclusive to MAX6358/MAX6359/MAX6360 variants (6-pin SOT23). The MAX6352SVUK-T is a dual-voltage supervisor only, with RST, MR, VCC1, VCC2, and GND pins - no WDI terminal is present.

Can the MAX6352SVUK-T's RST output drive a 5V logic input directly?

Yes, the MAX6352SVUK-T's RST is an open-drain output rated to 6V, so it can interface directly with 5V logic when pulled up to 5V. The output sinks 1.2mA at VCC ≥ 2.7V, meeting standard TTL/CMOS input requirements. No level-shifter is needed.

What is the minimum supply voltage required for the MAX6352SVUK-T to assert a valid reset signal?

The MAX6352SVUK-T guarantees valid reset assertion as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - even if the other supply is absent or shorted. This ensures fail-safe operation during deep brownout, unlike many supervisors requiring both supplies above 1.8V or higher.

Is the MAX6352SVUK-T pin-compatible with other devices in the MAX6351–MAX6360 family?

The MAX6352SVUK-T shares the same 5-pin SOT23 package and pinout with MAX6352xxUK-T variants (e.g., UV, UW), but is not pin-compatible with 6-pin variants (MAX6351, MAX6355, etc.) or with MAX6353/MAX6354 which have push-pull RST outputs. Pin 1 is RST (open-drain) across all MAX6352 variants.