Analog Devices Inc./Maxim Integrated MAX6467US26D3+T

Overview

MAX6467US26D3+T from Analog Devices is a microprocessor supervisory reset circuit in SOT143-4 package, monitoring +2.625V supply (±1.5% at +25°C) with 150ms minimum reset timeout, active-low open-drain RESET output, and edge-triggered manual reset input. It ensures reliable µP reset during power-up, brownout, and transient events in automotive and industrial embedded systems.

For engineers reviewing the MAX6467US26D3+T datasheet, MAX6467US26D3+T pinout, MAX6467US26D3+T application, or MAX6467US26D3+T equivalent, this device delivers precision threshold detection, glitch immunity, low 3µA supply current at 1.8V, VCC-operated validity down to +1V, and AEC-Q100 qualification for harsh-environment designs.

Technical Context

The MAX6467US26D3+T implements a factory-trimmed bandgap-based voltage reference with ±1.5% threshold accuracy at +25°C, degrading to ±3% over –40°C to +125°C. Its internal one-shot timer generates fixed 150ms (min) reset pulses on both VCC dropout and MR falling edge, with 150ms MR rising debounce to suppress switch bounce.

It uses BiCMOS process (748 transistors), supports VCC from +1.2V to +5.5V, and guarantees RESET assertion while VCC ≥ +1V. The open-drain RESET requires external pullup; MR includes a 1.5kΩ internal pullup to VCC and accepts TTL/CMOS logic levels.

Key Specifications

Pinout & Package

Package: 4-pin SOT143 (U4+1, outline 21-0052), 1.3mm × 1.3mm × 0.9mm body, lead(Pb)-free/RoHS-compliant (+T suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6467US26D3+T, MAX6315US26D3+T offers push-pull convenience but forfeits bus-sharing capability, while TPS3808G18DBVR trades threshold accuracy and automotive qualification for ultra-low ICC-making MAX6467US26D3+T optimal for robust +2.5V system supervision.

Availability

MAX6467US26D3+T is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLCs, medical battery-backed devices, and DSL modem power management requiring stable component supply across extended temperature and long lifecycle programs.

Supply support for MAX6467US26D3+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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The MAX6467 series belongs to Analog Devices' precision supervisory IC portfolio, engineered specifically for reliable power-monitoring and reset generation in safety-critical automotive and industrial environments.

FAQ

What is the exact reset threshold voltage of MAX6467US26D3+T and how tightly is it specified?

The MAX6467US26D3+T has a factory-trimmed nominal reset threshold of +2.625V, with ±1.5% tolerance at +25°C and ±3% over the full –40°C to +125°C operating range. This corresponds to a guaranteed range of +2.559V (min) to +2.691V (max) at room temperature, as confirmed in the Reset Threshold table of the datasheet.

Does MAX6467US26D3+T support manual reset functionality, and how does its edge-triggered design work?

Yes, MAX6467US26D3+T features an edge-triggered manual reset (MR) input that responds only to the falling edge of the MR signal. Upon detection, it asserts the open-drain RESET output low for a fixed 150ms (min) one-shot pulse. Internal 150ms rising-edge debounce prevents false triggers from switch bounce, making external hardware debouncing unnecessary.

What package type and footprint does MAX6467US26D3+T use, and is it RoHS-compliant?

MAX6467US26D3+T uses the 4-pin SOT143 package (package code U4+1, outline 21-0052), measuring 1.3mm × 1.3mm × 0.9mm. The "+T" suffix explicitly denotes lead(Pb)-free and RoHS-compliant construction, with land pattern documented in Analog Devices' package drawing 90-0183.

Is MAX6467US26D3+T qualified for automotive applications, and what standards does it meet?

Yes, MAX6467US26D3+T is AEC-Q100 qualified for automotive use. While the base part number does not include "/V", its datasheet confirms qualification for the full –40°C to +125°C temperature range and references AEC-Q100 testing in the Ordering Information section-making it suitable for body electronics, infotainment, and ADAS subsystems.

How does the open-drain RESET output of MAX6467US26D3+T differ from push-pull alternatives, and what external component is required?

The open-drain RESET output of MAX6467US26D3+T requires an external pullup resistor (typically 10kΩ–100kΩ) to the host supply rail. This enables wired-OR connection with other reset sources-unlike push-pull outputs-and supports level translation. The MAX6467US26D3+T datasheet specifies RESET leakage ≤1µA when not asserted, ensuring minimal impact on pullup selection.