Analog Devices Inc./Maxim Integrated MAX6336US20D3

Overview

MAX6336US20D3 from Maxim Integrated is a push/pull, active-low microprocessor supervisory circuit designed for 1.8V–3.3V digital systems. It monitors VCC and asserts RESET when supply voltage falls below 2.00V (±2% over temperature), provides 100ms minimum reset timeout, operates down to 0.7V VCC, draws only 3.3µA at 2.5V, and features debounced manual-reset input - used in portable equipment, controllers, and critical µP power monitoring.

For engineers reviewing the MAX6336US20D3 datasheet, MAX6336US20D3 pinout, MAX6336US20D3 application, or MAX6336US20D3 equivalent, key selection criteria include guaranteed RESET validity to 0.7V VCC, factory-trimmed 2.0V threshold with ±3% tolerance over –40°C to +125°C, SOT143 package compatibility, and absence of external components required for basic reset functionality.

Technical Context

The MAX6336US20D3 implements a precision bandgap-based reset comparator with factory-trimmed 2.00V threshold (±1.8% at +25°C, ±3% over full temperature range) and built-in immunity to fast VCC transients (e.g., <24µs glitches at 10mV overdrive). Its internal timing circuit generates a fixed 100ms minimum reset pulse width after VCC recovery or MR deassertion.

It uses a push/pull output stage capable of sourcing ≥200µA at VCC ≥1.8V (VOH ≥0.8VCC) and sinking ≥50µA at VCC ≥1.0V (VOL ≤0.4V), with MR input featuring a 20kΩ internal pull-up and 160µs minimum pulse width requirement. The device remains fully functional and guarantees correct RESET state down to VCC = 0.7V.

Key Specifications

Pinout & Package

MAX6336US20D3 is housed in a 4-pin SOT143 package (JEDEC TO-253-4), measuring 2.9mm × 1.5mm × 1.1mm, with gull-wing leads and lead-free option available (+T suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX811SUR23+T and MAX6314US20D3+T, the MAX6336US20D3 uniquely combines 2.00V threshold, 100ms timeout, push/pull output, debounced MR, and 0.7V operation - enabling simpler, more robust reset design in space-constrained portable and automotive systems without external components.

Availability

MAX6336US20D3 is available at Aetrix Electronics and suitable for portable equipment, industrial controllers, and automotive body electronics requiring stable component supply, long-term lifecycle support, and guaranteed performance across –40°C to +125°C.

Supply support for MAX6336US20D3 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 analog and mixed-signal ICs for power, interface, sensing, and timing applications.

The MAX633x family delivers ultra-low-voltage, low-power µP supervisory circuits targeting battery-operated, automotive, and industrial systems where reliability under brownout and minimal bill-of-materials are critical design goals.

FAQ

What is the exact reset threshold voltage for MAX6336US20D3 and how does it vary with temperature?

The MAX6336US20D3 has a factory-trimmed nominal reset threshold of 2.00V. At +25°C, tolerance is ±1.8%, and over the full –40°C to +125°C operating range, it is specified as ±3%. This means the actual threshold falls between 1.94V and 2.06V at room temperature, and between 1.94V and 2.06V across temperature - confirmed in Table 1 and Electrical Characteristics section of the datasheet.

Does MAX6336US20D3 require external components to function as a reset supervisor?

No, the MAX6336US20D3 operates autonomously with no external resistors, capacitors, or diodes required. Its internal 20kΩ MR pull-up, factory-trimmed threshold, and fixed 100ms timeout eliminate all external components - a core design feature highlighted in the General Description and Applications Information sections.

What is the minimum supply voltage at which MAX6336US20D3 guarantees correct RESET output behavior?

The MAX6336US20D3 guarantees correct RESET assertion and deassertion down to VCC = 0.7V, as explicitly stated in the General Description and Absolute Maximum Ratings. This ultra-low operating voltage enables reliable brownout detection in deeply discharged battery scenarios where other supervisors fail.

How does the manual reset (MR) input of MAX6336US20D3 work, and what is its minimum pulse width?

The MR input of MAX6336US20D3 is debounced internally and features a 20kΩ pull-up resistor. A logic-low pulse on MR asserts RESET; the minimum valid pulse width is 160µs at VCC = 2.6V. No external debounce circuitry is needed - this is confirmed in the Pin Description and Applications Information sections.

Is MAX6336US20D3 pin-compatible with other Maxim reset ICs, and which ones?

Yes, the MAX6336US20D3 is pin-compatible with MAX811/MAX812 and MAX6314/MAX6315 families in the 4-pin SOT143 package, as stated in the Features list. This allows drop-in replacement in existing layouts where footprint and pin function match - though electrical differences (e.g., output type, threshold, timeout) must be verified per application.