Analog Devices Inc./Maxim Integrated MAX6467XS26D3+T

Overview

The MAX6467XS26D3+T from Analog Devices is a precision microprocessor supervisory reset circuit in SC70-4 package, monitoring +2.625V supply (±2.5% over -40°C to +85°C), asserting active-low open-drain RESET on VCC drop or edge-triggered MR input, with 150ms min reset timeout, and guaranteed operation down to VCC = +1V - used in automotive infotainment power sequencing.

For engineers reviewing the MAX6467XS26D3+T datasheet, MAX6467XS26D3+T pinout, MAX6467XS26D3+T application, or MAX6467XS26D3+T equivalent, key selection criteria include factory-trimmed 2.625V threshold accuracy, edge-triggered one-shot manual reset immunity to switch bounce, 3µA supply current at 1.8V, -40°C to +125°C automotive qualification, and open-drain output requiring external pullup.

Technical Context

This device implements a precision bandgap-based voltage comparator for VCC monitoring, combined with digital edge-detection logic for the MR input. The internal one-shot timer ensures fixed-duration RESET assertion independent of MR pulse width.

It features factory-laser-trimmed reset threshold (2.625V typ, ±2.5% over -40°C to +85°C), 150ms minimum reset timeout period, and MR rising debounce of 150ms to reject switch bounce - all operating within 1.2V to 5.5V supply range and validated across -40°C to +125°C.

Key Specifications

Pinout & Package

Package: SC70-4 (4-pin, 1.3mm × 1.1mm × 0.6mm, 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 MAX6467XS26D3+T, MAX6384US26D3+T offers push-pull convenience but sacrifices bus-sharing capability, while TPS3808G33DBVR lacks the precise 2.625V threshold and requires PCB layout changes - making MAX6467XS26D3+T optimal for space-constrained, 2.6V automotive modules needing open-drain flexibility.

Availability

MAX6467XS26D3+T is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC I/O modules, medical patient monitors, telematics control units, and battery-powered sensor nodes requiring stable component supply across extended temperature ranges.

Supply support for MAX6467XS26D3+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.

The MAX6467 series belongs to Analog Devices' precision supervisory IC product line, designed specifically for automotive and industrial applications demanding accurate voltage monitoring, robust manual reset functionality, and extended temperature operation without external components.

FAQ

What is the exact reset threshold voltage of the MAX6467XS26D3+T?

The MAX6467XS26D3+T has a factory-trimmed reset threshold of 2.625V (typical), with tolerance of ±2.5% over the -40°C to +85°C temperature range and ±3% over -40°C to +125°C. This value is laser-trimmed during production and does not require external calibration. The MAX6467XS26D3+T is specifically configured for monitoring +2.6V supply rails in automotive and industrial systems.

Does the MAX6467XS26D3+T support operation down to 1.2V supply voltage?

Yes, the MAX6467XS26D3+T operates over a supply range of +1.2V to +5.5V at temperatures from -40°C to +125°C. Its internal circuitry remains functional and RESET output remains valid down to VCC = +1V, enabling reliable reset assertion during deep brownout conditions. The MAX6467XS26D3+T draws only 3µA at 1.8V, making it suitable for ultra-low-power applications.

Is the MR input of the MAX6467XS26D3+T compatible with TTL or CMOS logic levels?

Yes, the MR input of the MAX6467XS26D3+T accepts standard TTL and CMOS logic levels. For VTH < +4V, VIH is 0.7 × VCC and VIL is 0.3 × VCC; for VTH ≥ +4V, VIH is 2.4V and VIL is 0.8V. It also features an internal 1.5kΩ pullup resistor to VCC, allowing direct connection of a momentary switch from MR to GND without external components. The MAX6467XS26D3+T ignores switch bounce via 150ms rising-edge debounce.

What is the function of the open-drain RESET output in the MAX6467XS26D3+T?

The open-drain RESET output in the MAX6467XS26D3+T allows wired-OR connection with other reset sources on a shared reset bus and supports level translation across different I/O voltage domains. It requires an external pullup resistor (typically 10–100kΩ) to the target logic rail. When asserted, RESET sinks up to 80µA at VCC ≥ +1V, ensuring compatibility with diverse microcontroller reset inputs. This architecture is essential in the MAX6467XS26D3+T for flexible system-level reset coordination.

How is the MAX6467XS26D3+T qualified for automotive use?

The MAX6467XS26D3+T is AEC-Q100 qualified for automotive applications, specified over -40°C to +125°C, and manufactured in a BiCMOS process with 748 transistors. It meets automotive reliability standards including transient immunity, latch-up immunity, and long-term stability under thermal cycling. The "/V" designation in ordering codes (e.g., MAX6467XS26D3/V+T) confirms full automotive qualification - the MAX6467XS26D3+T itself carries this qualification per Analog Devices' standard automotive release.