Analog Devices Inc./Maxim Integrated MAX6468XS26D1+

Overview

MAX6468XS26D1+ from Maxim Integrated is a push-pull output microprocessor supervisory reset circuit monitoring +2.625V supply voltage with ±1.5% threshold accuracy at +25°C, 150ms minimum reset timeout, and operation from -40°C to +125°C. It asserts active-low RESET when VCC drops below threshold or on MR falling edge, supporting automotive and industrial embedded systems requiring reliable power-on and brownout reset.

For engineers reviewing the MAX6468XS26D1+ datasheet, MAX6468XS26D1+ pinout, MAX6468XS26D1+ application, or MAX6468XS26D1+ equivalent, key selection criteria include factory-trimmed 2.625V reset threshold, edge-triggered manual reset with 150ms one-shot pulse, push-pull RESET output compatibility with TTL/CMOS loads, low 3µA supply current at 1.8V, and AEC-Q100 qualified automotive-grade reliability.

Technical Context

The MAX6468XS26D1+ implements a precision bandgap-based voltage reference and comparator to detect VCC falling below its factory-set 2.625V threshold (±1.5% at +25°C, ±2.5% over -40°C to +85°C). Its internal timing circuitry generates a fixed 150ms (min) reset timeout after VCC recovery and a synchronized 150ms (min) one-shot pulse on MR falling edge.

It features an edge-triggered MR input with 150ms rising debounce period to suppress switch bounce, internal 1.5kΩ MR pullup resistor, and push-pull RESET output capable of sourcing 500µA at 0.8×VCC (VCC ≥ 2.5V) while sinking 1.2mA at VOL ≤ 0.3V - enabling direct interface with µP reset inputs without external pullup.

Key Specifications

Pinout & Package

MAX6468XS26D1+ uses the 4-pin SC70 package (X4+1 outline), measuring 2.0mm × 2.1mm × 0.95mm, optimized for space-constrained portable and automotive modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6384US26D3+T, MAX6468XS26D1+ eliminates external pullup and improves noise immunity via push-pull drive; versus TPS3808G33DBVR, it delivers exact 2.625V threshold matching and drop-in SC70-4 replacement without layout change.

Availability

MAX6468XS26D1+ is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC controllers, and medical patient monitor sensors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6468XS26D1+ 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 is a semiconductor company specializing in analog and mixed-signal ICs for power, sensing, connectivity, and security applications.

The MAX6467/MAX6468 family was designed specifically for automotive and industrial microprocessor reset supervision, delivering precision voltage monitoring, edge-triggered manual reset, and AEC-Q100 qualified reliability in minimal SC70/SOT143 packages.

FAQ

What is the exact reset threshold voltage of MAX6468XS26D1+ and how tightly is it specified?

The MAX6468XS26D1+ has a factory-trimmed reset threshold of 2.625V, guaranteed to be within ±1.5% at +25°C and ±2.5% over the -40°C to +85°C temperature range. This specification is confirmed in the Reset Threshold table of the official datasheet and ensures accurate supervision of +2.6V supply rails without external calibration. The MAX6468XS26D1+ achieves this precision using laser-trimmed bandgap references during wafer sort.

Does MAX6468XS26D1+ support manual reset functionality, and how does it handle switch bounce?

Yes, MAX6468XS26D1+ features an edge-triggered manual reset (MR) input that responds only to the first falling edge and ignores subsequent edges for 150ms (tDEB), effectively rejecting mechanical switch bounce. The internal 1.5kΩ pullup resistor allows direct connection of a normally open pushbutton from MR to GND. This behavior is verified in the Applications Information section and timing diagrams of the MAX6468XS26D1+ datasheet.

What is the RESET output configuration of MAX6468XS26D1+, and why does it matter for system design?

MAX6468XS26D1+ provides an active-low push-pull RESET output, unlike open-drain alternatives. This means it can both source and sink current - driving high without an external pullup and pulling low with strong sink capability (1.2mA at VOL ≤ 0.3V). This eliminates the need for external components, reduces PCB area, and improves noise margin in high-speed or high-capacitance reset paths - a key advantage confirmed in the Pin Description and Electrical Characteristics sections.

Is MAX6468XS26D1+ qualified for automotive applications, and what standard does it meet?

Yes, MAX6468XS26D1+ is AEC-Q100 qualified for automotive use, as explicitly stated in the Features and Ordering Information sections of the datasheet. The "/V" suffix denotes automotive qualification, and the "+" indicates RoHS-compliant packaging. It operates over -40°C to +125°C and is validated for use in infotainment, ADAS, and body electronics where reliability under thermal stress and vibration is critical.

What package type and dimensions does MAX6468XS26D1+ use, and is it compatible with automated assembly?

MAX6468XS26D1+ uses the 4-pin SC70 package (outline X4+1), measuring 2.0mm × 2.1mm × 0.95mm, with gull-wing leads suitable for standard reflow soldering. Land pattern #90-0187 is specified for PCB layout, and the device is supplied in tape-and-reel format ("T" suffix). This package is fully compatible with high-volume SMT assembly lines and meets IPC-7351B standards for density and thermal performance.