Analog Devices Inc./Maxim Integrated MAX6467XS29D3-T

Overview

MAX6467XS29D3-T from Maxim Integrated is a microprocessor supervisory reset circuit in SC70-4 package, featuring a factory-trimmed 2.925V reset threshold (±1.5% at +25°C), 150ms minimum reset timeout, active-low open-drain RESET output, and edge-triggered manual reset input. It monitors +3.3V supply rails in automotive-grade systems operating from -40°C to +125°C with 3µA supply current at 1.8V.

For engineers reviewing the MAX6467XS29D3-T datasheet, MAX6467XS29D3-T pinout, MAX6467XS29D3-T application, or MAX6467XS29D3-T equivalent, this device serves as a precision voltage-monitoring reset supervisor for embedded control, automotive electronics, and portable equipment where low quiescent current, noise immunity, and guaranteed operation down to VCC = +1V are critical selection criteria.

Technical Context

The MAX6467XS29D3-T implements a precision bandgap-based voltage reference and comparator to detect VCC drops below its 2.925V threshold, with ±2.5% tolerance over -40°C to +85°C and ±3% up to +125°C. Its internal one-shot timer generates a fixed 150ms–300ms reset pulse on VCC recovery or MR falling edge.

It features an edge-triggered MR input with 150ms–300ms rising-edge debounce period to reject switch bounce, internal 500Ω–3kΩ pullup resistor on MR, and open-drain RESET output requiring external pullup. RESET remains valid down to VCC = +1V, supporting brownout detection in low-voltage systems.

Key Specifications

Pinout & Package

MAX6467XS29D3-T is housed in a 4-pin SC70-4 package (2.0mm × 2.1mm, 0.65mm pitch), optimized for space-constrained PCB layouts in 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 MAX6467XS29D3-T, MAX6315US29D3-T offers push-pull drive but larger package and no MR debounce flexibility, while TLV803EB29DBZR reduces size and cost but removes manual reset capability entirely-making MAX6467XS29D3-T optimal for space-constrained designs needing both precision monitoring and robust user-initiated reset.

Availability

MAX6467XS29D3-T is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLCs, and portable medical devices requiring stable component supply, AEC-Q200-aligned reliability, and long-term production continuity.

Supply support for MAX6467XS29D3-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

Maxim Integrated, now part of Analog Devices, designs high-performance analog and mixed-signal ICs for industrial, automotive, communications, and computing markets.

The MAX6467/MAX6468 family delivers precision, low-power supervisory circuits for microprocessor reset management in harsh environments-specifically engineered for automotive (-40°C to +125°C) and industrial applications demanding guaranteed timing and voltage accuracy.

FAQ

What is the exact reset threshold voltage of the MAX6467XS29D3-T?

The MAX6467XS29D3-T has a factory-trimmed nominal reset threshold of 2.925V, with ±1.5% tolerance at +25°C, ±2.5% over -40°C to +85°C, and ±3% over -40°C to +125°C. This value is laser-trimmed during production and documented in the Reset Threshold table of the datasheet. The '29' suffix explicitly denotes the 2.925V option, making MAX6467XS29D3-T suitable for monitoring standard 3.3V supplies with appropriate margin.

Does the MAX6467XS29D3-T support manual reset functionality, and how does it behave?

Yes, the MAX6467XS29D3-T includes an edge-triggered manual reset (MR) input on Pin 3. A falling edge on MR initiates a one-shot 150ms–300ms active-low RESET pulse, independent of VCC level. Internal debounce ignores subsequent MR edges for 150ms–300ms after MR rises, eliminating switch bounce issues. The MR pin has an internal 500Ω–3kΩ pullup to VCC, allowing direct connection to a momentary switch without external components.

What is the RESET output type of the MAX6467XS29D3-T, and what design implications does it have?

The MAX6467XS29D3-T features an active-low open-drain RESET output (Pin 2). This requires an external pullup resistor to a logic rail (e.g., 3.3V or 5V) and enables wired-OR reset bus configurations with multiple supervisors or peripherals. Unlike push-pull outputs, it cannot actively drive high, but provides flexibility in voltage translation and fault-tolerant reset arbitration-critical in complex multi-supply systems where MAX6467XS29D3-T is commonly deployed.

What is the minimum operating voltage for the MAX6467XS29D3-T, and why does it matter?

The MAX6467XS29D3-T operates down to VCC = +1.0V, and its RESET output remains valid (i.e., correctly asserted or deasserted) as long as VCC stays above +1V. This specification ensures reliable brownout detection and controlled shutdown in systems where supply voltage may sag significantly before complete failure-such as automotive cold-crank events or battery-depleted portable devices-making MAX6467XS29D3-T especially valuable in safety-critical and energy-sensitive applications.

Is the MAX6467XS29D3-T qualified for automotive applications, and what evidence supports that?

Yes, the MAX6467XS29D3-T is specified over -40°C to +125°C and packaged in SC70-4, matching the automotive temperature grade defined in the Ordering Information section. Though not explicitly marked "/V" in this variant, its full temperature range, BiCMOS process, and qualification testing per Maxim's automotive standards confirm suitability for under-hood and cabin modules. The datasheet lists "Automotive Products" in Applications and references AEC-Q200-aligned stress testing in Absolute Maximum Ratings-key validation points for MAX6467XS29D3-T in automotive designs.