Analog Devices Inc./Maxim Integrated MAX6736XKRVD3

Overview

The MAX6736XKRVD3 from Maxim Integrated is a dual-voltage microprocessor supervisor IC with two factory-trimmed reset thresholds (VTH1 = 3.075V, VTH2 = 2.313V), open-drain active-low RESET output, manual reset input (MR), and 150ms minimum reset timeout period. It monitors primary I/O supply (VCC1) and secondary core supply (VCC2) in portable and multivoltage systems, ensuring reliable µP reset assertion during brownout or power-up sequencing.

For engineers reviewing the MAX6736XKRVD3 datasheet, MAX6736XKRVD3 pinout, MAX6736XKRVD3 application, or MAX6736XKRVD3 equivalent, this device delivers precision dual-supply monitoring with ultra-low 6µA quiescent current, SC70-5 space-saving packaging, and guaranteed operation from –40°C to +85°C - critical for battery-powered controllers, POS terminals, and GPS equipment where supply integrity and board area are constrained.

Technical Context

The MAX6736XKRVD3 implements independent voltage comparators for VCC1 and VCC2, each referenced to a precision internal bandgap (±1.5% threshold accuracy over temperature), with hysteresis of 0.5% to reject noise-induced false resets. Its reset logic asserts RESET low when either supply falls below its trimmed threshold and holds it low for ≥150ms after both supplies recover.

It features an internal 1.5kΩ MR pullup to VCC1, supports CMOS-logic-level manual reset pulses as short as 1µs, and guarantees valid RESET state while VCC1 or VCC2 remains above 1.2V - enabling robust supervision even during partial power loss scenarios in dual-rail embedded systems.

Key Specifications

Pinout & Package

MAX6736XKRVD3 is housed in a 5-pin SC70-5 package (2.0mm × 1.25mm, 0.9mm height), optimized for high-density portable PCB layouts. 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 input), and Pin 5 is VCC1 (primary supply input).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6736XKRVD3, the MAX6316HPUK31D3-T offers higher RESET drive but cannot supervise dual supplies, while the TPS3808G33DBVR provides programmable delay and lower current but sacrifices VCC2 monitoring - making MAX6736XKRVD3 uniquely suited for compact, battery-sensitive dual-rail systems requiring factory-trimmed precision.

Availability

MAX6736XKRVD3 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, POS terminals, and GPS tracking devices requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for MAX6736XKRVD3 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 leader specializing in high-performance analog, mixed-signal, and power management ICs for industrial, computing, and consumer applications.

The MAX6736–MAX6745 family was designed specifically for space-constrained, battery-operated multivoltage systems requiring ultra-low-power, factory-trimmed dual/triple supply supervision with minimal external components.

FAQ

What are the exact reset threshold voltages for MAX6736XKRVD3?

The MAX6736XKRVD3 has factory-trimmed reset thresholds of 3.075V for VCC1 (I/O supply) and 2.313V for VCC2 (core supply), with ±1.5% accuracy over –40°C to +85°C. These values correspond to the "T" and "Z" suffixes in Tables 1 and 2 of the datasheet, confirming the part number's dual-fixed configuration and precise voltage monitoring capability.

Does MAX6736XKRVD3 support manual reset functionality?

Yes, MAX6736XKRVD3 includes a dedicated active-low manual reset input (MR) on Pin 3. Pulling MR low for ≥1µs forces RESET low immediately, and RESET remains asserted for the full 150ms timeout period after MR returns high. An internal 1.5kΩ pullup to VCC1 eliminates the need for an external resistor unless custom pullup voltage is required.

What is the recommended external pullup resistor value for the open-drain RESET output of MAX6736XKRVD3?

A 10kΩ pullup resistor to VCC1 is recommended for the open-drain RESET output of MAX6736XKRVD3. This value ensures fast rise time (<1µs) while limiting current to <330µA at 3.3V, maintaining compatibility with standard µP reset inputs and minimizing power consumption during reset assertion.

Can MAX6736XKRVD3 monitor a 1.8V core supply?

Yes, MAX6736XKRVD3 can monitor a 1.8V core supply via VCC2, as its 2.313V threshold provides sufficient margin above 1.8V to avoid false triggering during normal operation. The device guarantees valid RESET state while VCC2 ≥1.2V, supporting stable supervision even during transient core voltage dips common in dynamic load switching.

Is MAX6736XKRVD3 RoHS-compliant and available in lead-free packaging?

Yes, MAX6736XKRVD3 is RoHS-compliant and available in lead-free packaging. To order the lead-free version, replace the "-T" suffix with "+T" (e.g., MAX6736XKRVD3+T). Both versions meet JEDEC J-STD-020 moisture sensitivity level 1 and are qualified for reflow soldering per IPC/JEDEC J-STD-020.