Analog Devices Inc./Maxim Integrated MAX6364PUT46

Overview

MAX6364PUT46 from Maxim Integrated is a low-power microprocessor supervisory circuit with auxiliary adjustable reset input, battery switchover, and factory-preset 4.63V reset threshold. It operates from +1.2V supply, delivers up to 150mA from VCC or backup battery, asserts reset for ≥150ms after VCC recovery, and supports SRAM backup in brownout conditions.

For engineers reviewing the MAX6364PUT46 datasheet, MAX6364PUT46 pinout, MAX6364PUT46 application, or MAX6364PUT46 equivalent, this device is selected for precision power-monitoring in battery-backed embedded systems where guaranteed reset timing, low quiescent current (<35µA at 3.6V), and reliable VCC-to-BATT switchover are critical design requirements.

Technical Context

The MAX6364PUT46 integrates a precision voltage comparator (1.235V internal reference) for RESET IN monitoring, a hysteresis-controlled battery switchover MOSFET (40mV VCC–VBATT hysteresis), and a push-pull active-low RESET output. Its reset assertion logic combines VCC falling below 4.63V, RESET IN falling below 1.235V, or manual trigger-each holding reset for ≥150ms post-recovery.

It features guaranteed operation down to 1.2V on either VCC or VBATT, 100ns glitch immunity on MR/RESET IN inputs, and transient-immune reset propagation (≤5µs delay at 10V/ms VCC fall rate). The device enters battery-backup mode only when both VCC < VTH and VCC < VBATT – 0.02V, preventing oscillation during slow VCC decay.

Key Specifications

Pinout & Package

MAX6364PUT46 is housed in a 6-pin SOT23-6 package (1.6mm × 2.9mm × 1.1mm), optimized for space-constrained portable designs. Pin 1 is RESET (active-low push-pull), Pin 2 is GND, Pin 3 is RESET IN, Pin 4 is VCC, Pin 5 is OUT, Pin 6 is BATT.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6364HUT46-T, MAX6364PUT46 offers identical supervision functionality in tube packaging for prototyping and low-volume builds; versus TPS3808G33DBVR, it provides critical battery switchover and dual-threshold monitoring-making it irreplaceable in SRAM-retention-critical designs.

Availability

MAX6364PUT46 is available at Aetrix Electronics and suitable for industrial control, medical instrumentation, and smart metering applications requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance across temperature.

Supply support for MAX6364PUT46 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 power management, sensing, and interface applications.

The MAX6364PUT46 belongs to the MAX636x family of µP supervisory circuits engineered specifically for battery-backed memory retention in harsh, low-power embedded systems-emphasizing ultra-low quiescent current, accurate voltage thresholds, and robust switchover control.

FAQ

What is the exact reset threshold voltage of the MAX6364PUT46?

The MAX6364PUT46 has a factory-preset reset threshold of 4.63V, with a tolerance of ±15mV over the full operating temperature range (-40°C to +85°C). This value is laser-trimmed during production and does not require external components. The MAX6364PUT46 uses this threshold to assert reset when VCC falls below 4.63V and maintain reset for at least 150ms after VCC rises above it.

Does the MAX6364PUT46 support battery switchover, and how does it work?

Yes, the MAX6364PUT46 supports automatic battery switchover. When VCC drops below both the 4.63V reset threshold and VBATT minus 20mV, the internal MOSFET connects BATT to OUT, powering downstream SRAM. Switchover hysteresis is 40mV to prevent oscillation. The MAX6364PUT46 draws only 0.02µA from VBATT in backup mode, enabling multi-year coin-cell operation.

What is the function of the RESET IN pin on the MAX6364PUT46?

The RESET IN pin on the MAX6364PUT46 is an auxiliary reset input referenced to a precision 1.235V internal comparator. When the voltage at RESET IN falls below 1.235V, the device asserts reset regardless of VCC level. This enables independent monitoring of a secondary power rail (e.g., 2.5V or 3.3V). The MAX6364PUT46 holds reset for ≥150ms after RESET IN returns high, ensuring reliable µP initialization.

What output type does the MAX6364PUT46 feature, and how is it configured?

The MAX6364PUT46 features an active-low push-pull RESET output (denoted by the "P" suffix). This means the RESET pin drives low during reset assertion and actively drives high when deasserted-eliminating the need for an external pull-up resistor. The MAX6364PUT46 can sink up to 20mA and is compatible with standard CMOS/TTL µP reset inputs without additional interface circuitry.

Can the MAX6364PUT46 operate from a 1.2V supply, and what functions remain active?

Yes, the MAX6364PUT46 guarantees full functionality down to 1.2V on either VCC or VBATT. At 1.2V, the reset comparator, RESET IN comparator, and push-pull RESET output remain operational. The MAX6364PUT46 continues to monitor VCC, assert reset on threshold violation, and switch OUT between VCC and VBATT-even during deep brownout. Supply current at 1.2V is <15µA, preserving battery life.