Analog Devices Inc./Maxim Integrated MAX6336US16D3+T

Overview

MAX6336US16D3+T from Maxim Integrated is a push/pull, active-low microprocessor supervisory circuit designed for ultra-low-voltage power monitoring in 1.8V–3.3V digital systems. It asserts reset when VCC falls below 1.60V or manual reset (MR) is triggered, maintains reset for ≥100ms after recovery, operates down to 0.7V supply, draws only 3.3µA at 2.5V, and is housed in a 4-pin SOT143 package for space-constrained portable equipment.

For engineers reviewing the MAX6336US16D3+T datasheet, MAX6336US16D3+T pinout, MAX6336US16D3+T application, or MAX6336US16D3+T equivalent, key selection considerations include guaranteed RESET validity to VCC = 0.7V, factory-trimmed 1.60V threshold with ±1.8% (25°C) tolerance, 100ms minimum reset timeout, debounced MR input with internal 20kΩ pull-up, and compatibility with Pentium II™ and battery-powered controllers requiring robust brownout immunity.

Technical Context

The MAX6336US16D3+T implements a precision bandgap-based voltage comparator with factory-trimmed 1.60V reset threshold, immune to fast VCC transients (e.g., ≤24µs glitches at 100mV overdrive). Its push/pull output drives low actively during reset and high (≥0.8×VCC) when deasserted, eliminating external pull-up components.

It integrates a debounced manual-reset input (MR) with 160µs minimum pulse width requirement and guarantees correct logic state across –40°C to +125°C. The device requires no external timing or biasing components and achieves full specification compliance over temperature without calibration.

Key Specifications

Pinout & Package

Package: 4-pin SOT143 (3.0mm × 1.6mm × 1.1mm), surface-mount, lead-free (RoHS-compliant) with +T suffix.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX811SEUS+T and MAX6314US29D3+T, the MAX6336US16D3+T uniquely combines 1.60V precision threshold, push/pull output, 0.7V operation, and 100ms timeout in one SOT143 device-making it optimal for space-constrained 1.8V systems where reset signal integrity and ultra-low supply voltage support are mandatory.

Availability

MAX6336US16D3+T is available at Aetrix Electronics and suitable for portable medical sensors, automotive body control modules, and industrial PLC I/O submodules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6336US16D3+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 precision analog, mixed-signal, and power-management ICs for industrial, automotive, communications, and computing applications.

The MAX633x family delivers ultra-low-voltage, low-power µP supervisory circuits targeting battery-powered, space-constrained, and high-reliability embedded systems where precise brownout detection and minimal quiescent current are critical.

FAQ

What is the exact reset threshold voltage of the MAX6336US16D3+T?

The MAX6336US16D3+T has a factory-trimmed reset threshold of 1.60V, with a tolerance of ±1.8% at +25°C and ±3% over the full –40°C to +125°C operating range. This value is confirmed in Table 1 of the official datasheet and applies specifically to the "US16" suffix variant. The MAX6336US16D3+T uses this precise threshold to reliably detect brownout conditions in 1.8V systems without external calibration.

Does the MAX6336US16D3+T require an external pull-up resistor on its RESET pin?

No, the MAX6336US16D3+T does not require an external pull-up resistor because it features a push/pull output stage. When deasserted, the RESET pin actively drives high to ≥0.8×VCC, ensuring a clean logic-high level without external components. This eliminates BOM cost and layout area versus open-drain alternatives like the MAX6337US16D3+T, which mandates an external pull-up. The MAX6336US16D3+T's integrated drive capability is verified across its full 0.7V–5.5V supply range.

What is the minimum reset timeout period specified for the MAX6336US16D3+T?

The MAX6336US16D3+T provides a minimum reset timeout period of 100ms, as indicated by the "D3" suffix in its part number. This value is guaranteed over the full –40°C to +125°C temperature range and ensures sufficient hold time for microprocessor power-up sequencing, oscillator stabilization, and peripheral initialization. The 100ms timeout is factory-programmed and does not require external capacitors or resistors-unlike adjustable supervisors. This fixed timing is a key feature of the MAX6336US16D3+T.

Can the MAX6336US16D3+T operate with a supply voltage below 1.0V?

Yes, the MAX6336US16D3+T is fully specified to operate down to 0.7V VCC, and its RESET output remains valid (correct logic state) at this voltage. This capability is explicitly guaranteed in the datasheet and distinguishes it from alternatives like the MAX6337, which is only guaranteed to 1.0V. The MAX6336US16D3+T's 0.7V operation supports deep brownout detection in battery-powered devices nearing end-of-life, ensuring safe shutdown before logic corruption occurs.

Is the MAX6336US16D3+T pin-compatible with other Maxim supervisory ICs?

Yes, the MAX6336US16D3+T is pin-compatible with the MAX811/MAX812 and MAX6314/MAX6315 families in the 4-pin SOT143 package. Pin 1 (GND), Pin 2 (RESET), Pin 3 (MR), and Pin 4 (VCC) match identically across these devices. However, functional differences exist-such as reset threshold, output type (push/pull vs. open-drain), and timeout period-so electrical validation is required before drop-in replacement. The MAX6336US16D3+T retains identical footprint and soldering profile for seamless board-level substitution where specifications align.