Analog Devices Inc./Maxim Integrated MAX6352MSUK+T

Overview

MAX6352MSUK+T from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in 5-pin SOT23 package, featuring active-low open-drain reset output referenced to VCC1, precision factory-set thresholds of 4.38V (VCC1) and 2.93V (VCC2), 20µA supply current, and guaranteed RESET validity down to VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - used for reliable power-on reset and undervoltage detection in multivoltage embedded systems.

For engineers reviewing the MAX6352MSUK+T datasheet, MAX6352MSUK+T pinout, MAX6352MSUK+T application, or MAX6352MSUK+T equivalent, key selection considerations include its open-drain RST output, dual-supply monitoring capability, manual-reset debouncing, temperature-stable threshold hysteresis, and compatibility with 1.2V–5.5V supply ranges across –40°C to +85°C.

Technical Context

The MAX6352MSUK+T monitors two independent supply rails (VCC1 and VCC2) and asserts its open-drain RST output low when either falls below its respective factory-trimmed threshold (4.38V/2.93V). Its reset state remains valid as long as at least one supply exceeds +1.0V, enabling robust brownout detection during asymmetric power sequencing.

It includes a debounced TTL/CMOS-compatible manual-reset input (MR), supports no external components for dual-rail supervision, and provides transient immunity via built-in glitch filtering - all implemented in BiCMOS process for stable operation over extended temperature range without external timing elements.

Key Specifications

Pinout & Package

MAX6352MSUK+T is housed in a RoHS-compliant 5-pin SOT23 package (U5-1 outline, land pattern 90-0174), with 1.6mm × 2.8mm footprint and 0.95mm height - optimized for space-constrained PCB layouts in portable and multivoltage systems.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6352MSUK+T, MAX6352MTUK+T offers identical functionality with a slightly higher VCC2 threshold ideal for tighter-tolerance 3.3V rails, while TPS3808G33DBVR reduces cost and power in single-rail designs but sacrifices dual-supply coordination and brownout margin below 1.0V.

Availability

MAX6352MSUK+T is available at Aetrix Electronics and suitable for computers, controllers, and portable/battery-powered equipment requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for MAX6352MSUK+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, computing, and communications markets.

The MAX6351–MAX6360 family was designed specifically for multivoltage microprocessor systems requiring precise, low-power, dual-rail supervision with minimal external components and guaranteed operation across extended temperature ranges.

FAQ

What is the function of the RST pin on the MAX6352MSUK+T?

The RST pin on the MAX6352MSUK+T is an active-low open-drain reset output referenced to VCC1. It asserts low whenever VCC1 drops below 4.38V or VCC2 drops below 2.93V. Because it is open-drain, an external pull-up resistor is required to define the high-level voltage - enabling interoperability with mixed-voltage logic families. The MAX6352MSUK+T guarantees this output remains valid as long as either VCC1 or VCC2 stays above +1.0V.

Does the MAX6352MSUK+T support watchdog timer functionality?

No, the MAX6352MSUK+T does not include a watchdog timer. Watchdog functionality is exclusive to the MAX6358/MAX6359/MAX6360 variants in the same family. The MAX6352MSUK+T provides only dual-voltage monitoring, manual reset input, and open-drain reset output - making it suitable for systems where processor activity monitoring is handled externally or not required.

What are the absolute maximum ratings for VCC1 and VCC2 on the MAX6352MSUK+T?

The absolute maximum rating for both VCC1 and VCC2 on the MAX6352MSUK+T is –0.3V to +6V relative to GND. However, functional operation is specified only from +1.2V to +5.5V over the full temperature range (–40°C to +85°C). Exceeding +6V or going below –0.3V risks permanent damage, and operation outside the functional range may result in undefined reset behavior or increased supply current.

Can the MAX6352MSUK+T monitor three voltage rails?

No, the MAX6352MSUK+T monitors exactly two voltage rails: VCC1 and VCC2. Three-rail monitoring is supported only by the MAX6355/MAX6356/MAX6357 variants, which include an additional RSTIN input with a 1.22V threshold. The MAX6352MSUK+T has no RSTIN pin and lacks internal circuitry for third-rail supervision - its pinout and internal architecture are strictly dual-supply focused.

Is the MAX6352MSUK+T pin-compatible with other members of the MAX6351–MAX6360 family?

The MAX6352MSUK+T shares the same 5-pin SOT23 package and pinout (RST, GND, MR, VCC2, VCC1) with MAX6353 and MAX6354, but differs functionally: MAX6353 uses push-pull RST referenced to VCC1, MAX6354 uses push-pull RST referenced to VCC2, while MAX6352MSUK+T uses open-drain RST. Swapping requires verifying output drive type and pull-up requirements - direct replacement is not assured without circuit review.