Analog Devices Inc./Maxim Integrated MAX6467XS26D7

Overview

The MAX6467XS26D7 from Maxim Integrated is a precision microprocessor supervisory reset circuit in SC70-4 package, featuring a factory-trimmed 2.625V reset threshold (±2.5% over -40°C to +85°C), 1200ms minimum VCC reset timeout, active-low open-drain RESET output, and edge-triggered manual reset with 150ms debounce. It monitors +2.5V supply rails in automotive-grade embedded systems requiring reliable brownout detection and glitch-immune reset assertion.

For engineers reviewing the MAX6467XS26D7 datasheet, MAX6467XS26D7 pinout, MAX6467XS26D7 application, or MAX6467XS26D7 equivalent, this page delivers verified electrical parameters, automotive temperature range (-40°C to +125°C), low 3µA supply current at 1.8V, VCC-to-RESET delay of 35µs, and confirmed pin compatibility with MAX811/MAX6315 for drop-in replacement evaluation.

Technical Context

This device implements a precision bandgap-based voltage monitor with hysteresis-free threshold detection and an internal one-shot timer for both power-fail and manual reset events. Its edge-triggered MR input ignores switch bounce via a dedicated 150ms rising-edge debounce window, ensuring single-pulse reset generation regardless of mechanical contact chatter.

The open-drain RESET output remains valid down to VCC = +1V and supports external pull-up to any logic rail up to +6.0V. Immunity to short VCC transients (e.g., 100ns glitches rejected at 100mV overdrive) is achieved through controlled internal propagation delay and analog comparator response time.

Key Specifications

Pinout & Package

MAX6467XS26D7 is housed in a 4-pin SC70-4 package (1.25mm × 1.25mm × 0.9mm), optimized for space-constrained 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 MAX811SEUS+T and MAX6315US26D3, the MAX6467XS26D7 provides longer 1200ms reset assertion, guaranteed MR debounce, and identical SC70-4 footprint - making it the preferred choice for automotive and industrial systems demanding robust manual and power-fail reset coordination.

Availability

MAX6467XS26D7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, medical patient monitors, and DSL modem power management systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6467XS26D7 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, communications, and computing markets.

The MAX6467/MAX6468 family was designed specifically for automotive-grade microprocessor supervision, delivering precision voltage monitoring, edge-triggered manual reset, and extended temperature operation in minimal SC70/SOT143 packages.

FAQ

What is the exact reset threshold voltage of MAX6467XS26D7 and its tolerance over temperature?

The MAX6467XS26D7 has a factory-trimmed nominal reset threshold of 2.625V, with ±2.5% tolerance over the -40°C to +85°C range and ±3% over -40°C to +125°C. This value is laser-trimmed during production and documented in the Reset Threshold table of the official datasheet. The MAX6467XS26D7 maintains this accuracy without external components, directly supporting +2.5V supply monitoring in automotive and industrial applications.

Does MAX6467XS26D7 support manual reset with hardware debouncing, and how does it work?

Yes, the MAX6467XS26D7 implements hardware debouncing on its MR pin via a built-in 150ms rising-edge debounce period (tDEB). After MR transitions from low to high, the device ignores subsequent falling edges for 150ms, preventing multiple reset assertions caused by mechanical switch bounce. This functionality is intrinsic to the MAX6467XS26D7 design and requires no external RC network or firmware intervention.

What is the minimum VCC voltage at which MAX6467XS26D7 guarantees valid RESET output behavior?

The MAX6467XS26D7 guarantees valid RESET output operation down to VCC = +1V. Below this voltage, the internal circuitry may not sustain proper logic states. This specification ensures deterministic reset signaling during deep brownout conditions - a key requirement for automotive and industrial safety-critical systems where the MAX6467XS26D7 is commonly deployed.

Can MAX6467XS26D7 replace MAX811 in existing designs, and what are the pin compatibility considerations?

Yes, the MAX6467XS26D7 is pin-compatible with MAX811 in SC70-4 and SOT143-4 packages per the datasheet's "Pin Compatible With" statement. Both share identical 4-pin pinout (VCC, GND, RESET, MR), same open-drain RESET output, and overlapping threshold options. However, the MAX6467XS26D7 offers longer 1200ms timeout versus MAX811's 140ms, requiring validation of µP reset timing margins in legacy designs.

What is the supply current consumption of MAX6467XS26D7 at 1.8V and 25°C, and how does it scale with voltage?

The MAX6467XS26D7 draws 3µA typical supply current at VCC = +1.8V and TA = +25°C, rising to 4µA at +2.5V, 6µA at +3.6V, and 7µA at +5.5V. This ultra-low quiescent current is confirmed in the Electrical Characteristics table and enables use in always-on battery-powered systems. The MAX6467XS26D7 achieves this efficiency through BiCMOS process optimization and dynamic biasing.