Analog Devices Inc./Maxim Integrated MAX6467US22D3

Overview

MAX6467US22D3 from Maxim Integrated is a microprocessor supervisory reset circuit in SOT143-4 package, monitoring +2.188V supply (typical threshold) with ±2.5% tolerance over -40°C to +125°C, asserting active-low open-drain RESET for 150ms (min) on VCC drop or MR edge trigger, and used in automotive engine control units requiring robust brownout detection.

For engineers reviewing the MAX6467US22D3 datasheet, MAX6467US22D3 pinout, MAX6467US22D3 application, or MAX6467US22D3 equivalent, key selection criteria include factory-trimmed 2.188V reset threshold, 150ms minimum reset timeout, edge-triggered manual reset immunity to switch bounce, and operation down to VCC = +1V - all critical for reliable power-on reset in harsh-temperature embedded systems.

Technical Context

The MAX6467US22D3 implements a precision bandgap-based voltage comparator with hysteresis to detect VCC drops below its factory-set 2.188V threshold, triggering an internal one-shot timer that holds RESET low for ≥150ms after recovery. Its edge-triggered MR input ignores subsequent falling edges within 150ms (tDEB), eliminating false resets from mechanical switch bounce.

It features an open-drain RESET output requiring external pullup, valid down to VCC = +1V, and draws only 3µA at +1.8V. The BiCMOS process ensures stable threshold accuracy across automotive temperature range (-40°C to +125°C) without external components.

Key Specifications

Pinout & Package

MAX6467US22D3 is housed in a 4-pin SOT143-4 package (3.0mm × 1.7mm × 1.3mm), surface-mount, RoHS-compliant, rated for automotive temperature range (-40°C to +125°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6467US22D3, MAX6315US22D3 offers identical electrical behavior in a smaller package but reduced mechanical reliability, while TLV809E22DBZR trades MR simplicity and automotive qualification for nanoscale current draw - making MAX6467US22D3 the optimal choice for ruggedized, manually resettable systems.

Availability

MAX6467US22D3 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, medical infusion pumps, and ADAS camera systems requiring stable component supply under extended temperature and long-lifecycle commitments.

Supply support for MAX6467US22D3 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 medical applications, emphasizing high-reliability performance under extreme conditions.

The MAX6467/MAX6468 product line delivers automotive-grade microprocessor supervisory circuits with factory-trimmed thresholds and edge-triggered manual reset - engineered specifically for fail-safe power sequencing in safety-critical embedded systems.

FAQ

What is the exact reset threshold voltage of MAX6467US22D3?

The MAX6467US22D3 has a factory-trimmed reset threshold of 2.188V (typical), with ±2.5% tolerance over -40°C to +85°C and ±3% over +85°C to +125°C. This value is laser-trimmed during production and documented in the Reset Threshold table of the MAX6467/MAX6468 datasheet. The '22' suffix explicitly denotes this 2.188V threshold, and the MAX6467US22D3 maintains this specification across its full automotive temperature range.

Does MAX6467US22D3 support manual reset with hardware debounce?

Yes, MAX6467US22D3 integrates hardware debounce on its MR pin with a guaranteed 150ms (min) rising-edge debounce period (tDEB). This means after MR transitions from low to high, the device ignores any subsequent falling edges for ≥150ms - eliminating switch bounce without external RC networks or firmware intervention. The MAX6467US22D3 uses this feature to ensure exactly one reset pulse per button press, even with noisy mechanical switches.

What is the minimum VCC voltage at which MAX6467US22D3 guarantees valid RESET output?

The MAX6467US22D3 guarantees valid RESET output down to VCC = +1V. Below this voltage, the internal circuitry may not sustain proper logic states, but above +1V, RESET remains asserted or deasserted as specified - including during brownout recovery. This capability is critical for systems where supply collapse must not cause premature RESET release; the MAX6467US22D3 maintains functional integrity longer than most supervisory ICs, which typically specify validity only down to +1.2V or higher.

Is MAX6467US22D3 pin-compatible with other Maxim reset supervisors?

Yes, MAX6467US22D3 is pin-compatible with MAX811, MAX6315, MAX6384, and MAX6386 in the same SOT143-4 package. All share identical 4-pin layout (VCC, GND, RESET, MR) and compatible voltage thresholds and timing - enabling drop-in replacement in existing designs. However, output type differs: MAX6467US22D3 uses open-drain RESET, whereas MAX6384/MAX6386 use push-pull; verify pullup requirements before substitution.

What package type and dimensions does MAX6467US22D3 use?

MAX6467US22D3 uses the SOT143-4 package: a 4-pin, surface-mount, gull-wing leaded outline measuring 3.0mm × 1.7mm × 1.3mm (L × W × H), with 0.95mm lead pitch. It is qualified for automotive applications (-40°C to +125°C) and available in both leaded and lead-free versions (suffix '+T' for RoHS-compliant). The 'US' in MAX6467US22D3 explicitly denotes the SOT143 package variant, distinguishing it from the SC70-4 'XS' version.