Analog Devices Inc./Maxim Integrated MAX6467XS29D3+T

Overview

MAX6467XS29D3+T from Analog Devices is a microprocessor supervisory reset circuit in SC70-4 package, monitoring +2.925V supply with ±1.5% threshold accuracy at +25°C, 150ms minimum reset timeout, active-low open-drain RESET output, and edge-triggered manual reset input. It ensures reliable power-on reset and brownout detection in automotive-grade embedded systems operating from -40°C to +125°C.

For engineers reviewing the MAX6467XS29D3+T datasheet, MAX6467XS29D3+T pinout, MAX6467XS29D3+T application, or MAX6467XS29D3+T equivalent, this page delivers verified electrical parameters, factory-trimmed threshold behavior, MR debounce timing, VCC-to-RESET delay (35µs), and compatibility with +2.925V supply rails in space-constrained industrial and automotive designs.

Technical Context

The MAX6467XS29D3+T implements a precision bandgap-based voltage reference with factory-trimmed reset threshold of 2.925V (min 2.852V, typ 2.925V, max 2.998V) across -40°C to +85°C. Its edge-triggered MR input ignores switch bounce via internal 150ms rising-edge debounce window and asserts a one-shot RESET pulse for exactly 150–300ms after MR falling edge.

VCC monitoring operates with 35µs propagation delay from threshold crossing, supports valid RESET down to VCC = +1V, and draws only 3µA at +1.8V supply. The open-drain RESET output requires external pullup and sinks 80µA at VOL ≤ 0.3V, enabling direct interface with µP reset inputs across diverse logic families.

Key Specifications

Pinout & Package

Package: SC70-4 (4-pin, 1.25mm × 1.65mm, 0.65mm pitch), lead(Pb)-free/RoHS-compliant (+T suffix).

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 identical electrical specs in a larger package for easier rework, while TLV803EB29DBZR trades automotive qualification and open-drain flexibility for lower cost and push-pull convenience in commercial applications.

Availability

MAX6467XS29D3+T is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O subsystems, and medical patient monitor front-ends requiring stable component supply with guaranteed AEC-Q100 compliance and long-term lifecycle support.

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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The MAX6467/MAX6468 product line delivers precision, low-power supervisory circuits optimized for automotive and industrial applications demanding extended temperature operation, factory-trimmed thresholds, and robust manual reset functionality - specifically targeting systems requiring guaranteed reset behavior under harsh electrical and thermal conditions.

FAQ

What is the exact reset threshold voltage of MAX6467XS29D3+T and its tolerance over temperature?

The MAX6467XS29D3+T has a factory-trimmed reset threshold of 2.925V (typical) with ±1.5% tolerance at +25°C. Over -40°C to +85°C, the tolerance widens to ±2.5%, and from +85°C to +125°C it is ±3%. The datasheet specifies min/max values of 2.852V and 2.998V respectively at +25°C, confirming the 2.925V nominal point for +3.0V supply monitoring.

Does MAX6467XS29D3+T require an external pullup resistor on the RESET pin?

Yes, MAX6467XS29D3+T requires an external pullup resistor on the RESET pin because it features an active-low open-drain output. The datasheet recommends typical values between 10kΩ and 100kΩ, depending on bus capacitance and rise-time requirements. This differs from the MAX6468 variant, which uses a push-pull output and does not require a pullup.

How does the manual reset (MR) input behave on MAX6467XS29D3+T during switch bounce?

The MR input on MAX6467XS29D3+T implements a 150ms rising-edge debounce period: after MR transitions from low to high, subsequent falling edges within that window are ignored. This ensures only one reset pulse per button press, eliminating need for external hardware or firmware debouncing. The MR timeout period itself is fixed at 150–300ms per reset assertion.

Can MAX6467XS29D3+T operate reliably below 1.8V supply voltage?

Yes, MAX6467XS29D3+T operates down to VCC = +1.0V, with full reset functionality guaranteed above +1.2V across the full -40°C to +125°C range. At +1.0V, RESET remains valid but may not assert correctly; the device draws only 3µA at +1.8V, making it suitable for ultra-low-power backup domains and energy-harvesting systems.

Is MAX6467XS29D3+T pin-compatible with other supervisory ICs in the same family?

Yes, MAX6467XS29D3+T is pin-compatible with all MAX6467 variants in SC70-4 package (e.g., MAX6467XS16D3+T, MAX6467XS46D3+T) and shares pinout with MAX6468XSxxD3+T. It is also documented as pin-compatible with MAX811, MAX6315, MAX6384, and MAX6386 - enabling drop-in replacement in existing designs using those legacy parts.