Analog Devices Inc./Maxim Integrated MAX6467XS22D3

Overview

MAX6467XS22D3 from Maxim Integrated is a microprocessor supervisory reset circuit in SC70-4 package, monitoring +2.188V supply (typical threshold) with 150ms minimum reset timeout, active-low open-drain RESET output, and edge-triggered manual reset input. It ensures reliable µP reset during brownout, power-up, and manual intervention in automotive-grade systems operating from -40°C to +125°C.

For engineers reviewing the MAX6467XS22D3 datasheet, MAX6467XS22D3 pinout, MAX6467XS22D3 application, or MAX6467XS22D3 equivalent, key selection criteria include factory-trimmed 2.2V threshold accuracy (±2.5% over -40°C to +85°C), 3µA supply current at 1.8V, VCC operation down to +1.2V, and immunity to <100ns MR glitches - critical for battery-powered and noise-prone embedded control designs.

Technical Context

The MAX6467XS22D3 implements a precision bandgap-based voltage comparator with hysteresis to detect VCC drops below its factory-set 2.133V (min) to 2.242V (max) threshold. Its internal one-shot timer generates a fixed 150–300ms RESET assertion after either VCC recovery or MR falling edge, independent of MR pulse width.

It features an integrated 1.5kΩ MR pullup resistor, eliminating external components for pushbutton reset interfaces, and guarantees RESET validity down to VCC = +1V. The open-drain RESET output requires an external pullup but supports mixed-voltage system interfacing and wired-OR configurations.

Key Specifications

Pinout & Package

MAX6467XS22D3 is housed in a 4-pin SC70-4 package (1.25mm × 1.25mm × 0.9mm), optimized for space-constrained portable and automotive PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6467XS22D3, MAX6384US22D3 offers pin compatibility but higher supply current and weaker MR debouncing, while TPS3808G12DBVR delivers superior threshold accuracy and lower ICC but sacrifices open-drain flexibility - making MAX6467XS22D3 optimal for cost-sensitive, noise-prone, multi-source reset systems requiring minimal external components.

Availability

MAX6467XS22D3 is available at Aetrix Electronics and suitable for automotive telematics, industrial PLC modules, portable medical monitors, and battery-powered IoT sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6467XS22D3 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 demanding industrial, automotive, and communications applications, emphasizing reliability, integration, and low-power operation.

The MAX6467/MAX6468 family was developed specifically for microprocessor reset supervision in harsh environments, delivering factory-trimmed thresholds, edge-triggered manual reset, and guaranteed operation from -40°C to +125°C without external components.

FAQ

What is the exact reset threshold voltage for MAX6467XS22D3?

The MAX6467XS22D3 has a factory-trimmed reset threshold of +2.133V (minimum), +2.188V (typical), and +2.242V (maximum) over the -40°C to +85°C temperature range. This 2.2V nominal threshold is optimized for monitoring +2.5V power supplies with standard tolerance bands, and the ±2.5% accuracy eliminates need for external calibration components in the MAX6467XS22D3 design.

Does MAX6467XS22D3 require an external pullup resistor on the RESET pin?

Yes, the MAX6467XS22D3 features an active-low open-drain RESET output, which requires an external pullup resistor to establish a valid logic-high level. The value depends on system voltage and sink current requirements, but a 10kΩ to 100kΩ resistor to the target logic rail is typical. This open-drain architecture enables wired-OR reset buses and mixed-voltage interfacing - a core design feature of the MAX6467XS22D3.

What is the minimum VCC voltage at which MAX6467XS22D3 guarantees proper reset operation?

The MAX6467XS22D3 guarantees functional reset assertion down to VCC = +1.2V over the full -40°C to +125°C temperature range, and maintains RESET validity as low as VCC = +1.0V. This ensures reliable brownout detection even during deep discharge of lithium-based batteries or unstable power-up sequences - a specified performance boundary for the MAX6467XS22D3, not a typical or estimated value.

How does the manual reset (MR) input of MAX6467XS22D3 handle switch bounce?

The MAX6467XS22D3 incorporates a 150ms MR rising debounce period (tDEB) that ignores all falling edges on the MR pin occurring within 150–300ms after MR transitions from low to high. This hardware-based debounce eliminates external RC filters and ensures only the first button press triggers a reset - a confirmed behavior documented in the MAX6467XS22D3 datasheet timing diagrams and electrical characteristics table.

Is MAX6467XS22D3 pin-compatible with other Maxim supervisory circuits?

Yes, the MAX6467XS22D3 is explicitly stated as pin-compatible with MAX811, MAX6315, MAX6384, and MAX6386 in the official datasheet Features section. All share identical 4-pin SC70-4 pinout (VCC, GND, RESET, MR), enabling drop-in replacement in existing layouts - a verified mechanical and electrical compatibility for the MAX6467XS22D3, subject to verifying functional alignment (e.g., timeout, threshold) in the target application.