Analog Devices Inc./Maxim Integrated MAX6736XKVRD3

Overview

The MAX6736XKVRD3 from Maxim Integrated is a dual fixed-voltage microprocessor supervisor IC in SC70-5 package, monitoring VCC1 (3.075V threshold) and VCC2 (2.313V threshold) with 150ms minimum reset timeout, open-drain active-low RESET output, manual reset input (MR), and -40°C to +85°C operation - used for reliable power-on reset and brownout detection in portable battery-powered systems.

For engineers reviewing the MAX6736XKVRD3 datasheet, MAX6736XKVRD3 pinout, MAX6736XKVRD3 application, or MAX6736XKVRD3 equivalent, key selection criteria include factory-trimmed dual-threshold accuracy, ultra-low 6µA supply current, SC70 space-constrained layout compatibility, and MR-initiated reset timing compliance with µP boot sequencing requirements.

Technical Context

The MAX6736XKVRD3 implements two independent voltage comparators with precision internal references (VTH1 = 3.075V, VTH2 = 2.313V) and hysteresis of 0.5% to reject supply transients. It asserts RESET when either VCC1 or VCC2 falls below its respective threshold and holds reset for ≥150ms after both supplies recover.

Its open-drain RESET output requires an external pullup; MR input features a 1.5kΩ internal pullup to VCC1 and supports CMOS-level or pushbutton-driven reset initiation with 1µs minimum pulse width and 100ns glitch rejection.

Key Specifications

Pinout & Package

MAX6736XKVRD3 is housed in a 5-pin SC70-5 package (2.0mm × 1.25mm, 0.65mm pitch), optimized for high-density portable designs. Pin 1 is RESET (open-drain active-low), Pin 2 is GND, Pin 3 is MR (active-low manual reset), Pin 4 is VCC2 (secondary supply monitor input), and Pin 5 is VCC1 (primary supply monitor input).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6736XKVRD3, MAX6316HPU29D3-T reduces cost and complexity in single-supply designs but forfeits core-rail monitoring, while TPS3808G125DBVR achieves lower quiescent current at the expense of dual-threshold capability and factory calibration.

Availability

MAX6736XKVRD3 is available at Aetrix Electronics and suitable for portable medical sensors, industrial handheld terminals, notebook power management, GPS tracking modules, and battery-backed data loggers requiring stable component supply with guaranteed long-term availability.

Supply support for MAX6736XKVRD3 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 connectivity in demanding environments.

The MAX6736–MAX6745 family was engineered specifically for dual- and triple-voltage microprocessor supervision in space- and power-constrained portable electronics, emphasizing factory-trimmed accuracy, ultra-low ICC, and SC70 integration.

FAQ

What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6736XKVRD3?

The MAX6736XKVRD3 has factory-trimmed reset thresholds of 3.075V for VCC1 and 2.313V for VCC2, each with ±2.5% tolerance over the full -40°C to +85°C temperature range. These values are encoded in the "VR" suffix per Maxim's ordering guide and verified in Table 1 of the official datasheet.

Does the MAX6736XKVRD3 support manual reset functionality, and how is it implemented?

Yes, the MAX6736XKVRD3 supports manual reset via Pin 3 (MR), an active-low input with an internal 1.5kΩ pullup to VCC1. Driving MR low for ≥1µs forces RESET low; RESET remains asserted for the full 150ms timeout after MR returns high. No external components are needed for basic pushbutton implementation.

What package type and dimensions does the MAX6736XKVRD3 use, and is it RoHS-compliant?

The MAX6736XKVRD3 uses a 5-pin SC70-5 package measuring 2.0mm × 1.25mm × 0.9mm (max height) with 0.65mm lead pitch. It is available in both leaded and lead-free versions; specify "+T" instead of "-T" in the order code for RoHS-compliant packaging.

Can the MAX6736XKVRD3 monitor voltages below 1.0V, such as a 0.9V core rail?

No - the MAX6736XKVRD3 is configured for fixed dual thresholds (3.075V and 2.313V) and does not support sub-1.0V monitoring. For 0.9V core rails, consider the MAX6738/MAX6739 variants with RSTIN input (threshold = 0.488V) or the MAX6742/MAX6745 with PFI input, neither of which apply to the MAX6736XKVRD3.

What is the maximum sink current capability of the open-drain RESET output on the MAX6736XKVRD3?

The MAX6736XKVRD3 RESET output guarantees VOL ≤ 0.4V when sinking 3.2mA (at VCC1 ≥ 4.25V) and ≤ 0.3V when sinking 50µA (at VCC1 ≥ 1.2V). Its open-drain structure requires an external pullup resistor; typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements.