Analog Devices Inc./Maxim Integrated MAX6736XKRVD3+

Overview

MAX6736XKRVD3+ 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. It ensures reliable power-on reset and brownout detection in portable battery-powered systems.

For engineers reviewing the MAX6736XKRVD3+ datasheet, MAX6736XKRVD3+ pinout, MAX6736XKRVD3+ application, or MAX6736XKRVD3+ equivalent, key selection criteria include dual-supply monitoring precision, ultra-low 6µA supply current, factory-trimmed thresholds, SC70 space-constrained layout compatibility, and MR-initiated reset timing behavior.

Technical Context

The MAX6736XKRVD3+ implements two independent voltage comparators with internal 1.23V reference and resistor-divider scaling to generate precise reset assertions at factory-set VTH1 = 3.075V and VTH2 = 2.313V. Its reset logic asserts open-drain RESET low when either VCC1 or VCC2 falls below its threshold and holds it for ≥150ms after both supplies recover.

It features an internal 1.5kΩ pullup on MR, supports CMOS-level manual reset triggering, and guarantees valid RESET state down to VCC1 ≥ 1.2V. The device uses BiCMOS process (249 transistors) and includes transient immunity design validated up to 35µs glitch rejection at 100mV overdrive.

Key Specifications

Pinout & Package

MAX6736XKRVD3+ is housed in a 5-pin SC70-5 package (1.6mm × 1.6mm × 0.95mm), optimized for space-constrained 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 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-supply supervisory applications.

Compared with MAX6316HUT46D3+ and TPS3808G18DBVR, MAX6736XKRVD3+ uniquely delivers factory-trimmed dual-voltage supervision in SC70-5 with MR support-enabling compact, robust reset control for multirail portable systems without redesigning power architecture.

Availability

MAX6736XKRVD3+ is available at Aetrix Electronics and suitable for portable/battery-powered equipment, multivoltage systems, and notebook computers requiring stable component supply, long-term lifecycle support, and lead-free compliance.

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) designs precision analog and mixed-signal ICs for power management, sensing, and connectivity in demanding industrial and portable applications.

The MAX6736–MAX6745 product line delivers ultra-low-power dual/triple-voltage supervisors optimized for space- and energy-constrained battery-operated systems requiring deterministic reset behavior across multiple supply domains.

FAQ

What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6736XKRVD3+?

The MAX6736XKRVD3+ has factory-trimmed reset thresholds of 3.075V for VCC1 and 2.313V for VCC2, with ±75mV tolerance over the full -40°C to +85°C operating temperature range. These values are defined by the "TR" suffix in the part number and confirmed in Table 1 of the official datasheet. The MAX6736XKRVD3+ does not support adjustable thresholds - both are fixed and laser-trimmed during production.

Does the MAX6736XKRVD3+ support manual reset functionality, and how is it implemented?

Yes, the MAX6736XKRVD3+ includes a dedicated active-low manual reset input (MR) on Pin 3. It features an internal 1.5kΩ pullup to VCC1, accepts CMOS-compatible logic levels, and triggers RESET assertion when pulled low for ≥1µs. After MR is released, RESET remains active for the full 150ms timeout period. This function is fully integrated - no external debounce circuitry is needed.

What is the reset output configuration of the MAX6736XKRVD3+, and what external components are required?

The MAX6736XKRVD3+ provides an open-drain active-low RESET output on Pin 1. An external pullup resistor (typically 10kΩ to VCC1) is mandatory to establish a valid logic-high level. This configuration enables direct interfacing with bidirectional µP reset pins and supports wired-OR reset bus architectures - a key advantage over push-pull alternatives that risk contention.

How does the MAX6736XKRVD3+ ensure reliability during short power supply transients?

The MAX6736XKRVD3+ incorporates intrinsic transient immunity: its reset comparator includes built-in hysteresis (0.5%) and is designed to ignore falling VCC glitches ≤35µs in duration when overdriven by 100mV. Combined with a recommended 0.1µF bypass capacitor at VCC1, this prevents spurious resets during switching noise or brief brownouts - ensuring only sustained supply faults trigger system recovery.

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

Yes, the MAX6736XKRVD3+ is RoHS-compliant and supplied in lead-free packaging. The "+" suffix explicitly denotes lead-free termination per JEDEC J-STD-020. It meets IPC/JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and is qualified for reflow soldering per industry-standard profiles. Full compliance documentation is available from Analog Devices' product page for MAX6736XKRVD3+.