Analog Devices Inc./Maxim Integrated MAX6467XS16D3

Overview

The MAX6467XS16D3 from Maxim Integrated is a microprocessor supervisory reset circuit in SC70-4 package, monitoring +1.8V supply with factory-trimmed 1.575V reset threshold (±2.5% over -40°C to +85°C), 150ms minimum reset timeout, and active-low open-drain RESET output. It ensures reliable power-on reset and brownout detection for embedded microcontrollers in automotive and industrial systems.

For engineers reviewing the MAX6467XS16D3 datasheet, MAX6467XS16D3 pinout, MAX6467XS16D3 application, or MAX6467XS16D3 equivalent, key selection criteria include its 1.575V threshold tolerance, 3µA supply current at 1.8V, VCC operation down to +1V, edge-triggered manual reset with 150ms one-shot timing, and immunity to sub-100ns MR glitches.

Technical Context

This device implements a precision bandgap-based voltage comparator with hysteresis to detect VCC drops below the 1.575V threshold, triggering an open-drain RESET assertion that remains active for ≥150ms after VCC recovery. The internal MR debounce logic ignores falling edges within 150ms of MR rising, preventing switch bounce-induced false resets.

The MAX6467XS16D3 uses BiCMOS process technology (748 transistors) and integrates a 1.5kΩ internal MR pullup resistor. Its RESET output remains valid down to VCC = +1V, and it rejects transients as short as 100ns on MR and up to 26µs on VCC (at 100mV overdrive), confirmed across -40°C to +125°C.

Key Specifications

Pinout & Package

MAX6467XS16D3 is housed in a 4-pin SC70-4 package (2.0mm × 2.1mm × 0.9mm), optimized for space-constrained PCB layouts in portable and automotive applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6467XS16D3, MAX6315US29D3 targets higher-voltage rails and lacks 1.8V optimization, while MAX6384US29D3 adds watchdog capability at cost and design overhead-neither offers the precise 1.575V threshold, 3µA current, or automotive-grade reliability of the MAX6467XS16D3 for +1.8V embedded systems.

Availability

MAX6467XS16D3 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC subsystems, portable medical sensor hubs, and battery-powered IoT edge nodes requiring stable component supply with guaranteed long-term availability.

Supply support for MAX6467XS16D3 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 high-performance analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.

The MAX6467/MAX6468 family was engineered specifically for robust microprocessor reset supervision in harsh environments, emphasizing precision threshold stability, ultra-low power, and immunity to electrical noise across -40°C to +125°C.

FAQ

What is the exact reset threshold voltage of the MAX6467XS16D3?

The MAX6467XS16D3 has a factory-trimmed reset threshold of 1.575V, with guaranteed limits of 1.536V (min) and 1.614V (max) over the -40°C to +85°C temperature range. This value is laser-trimmed during production and specified in the Reset Threshold table of the datasheet; it is optimized for reliable supervision of +1.8V power rails without external components.

Does the MAX6467XS16D3 support manual reset functionality, and how does it work?

Yes, the MAX6467XS16D3 features an edge-triggered manual reset (MR) input on Pin 3. A falling edge on MR initiates a one-shot 150ms (min) reset pulse on the open-drain RESET output, regardless of how long MR remains low. Internal 150ms rising-edge debounce prevents multiple pulses from switch bounce, and a 1.5kΩ internal pullup allows direct connection of a momentary switch to GND-no external resistor required.

What is the supply current consumption of the MAX6467XS16D3 at 1.8V?

The MAX6467XS16D3 draws only 3µA (typical) and up to 7.5µA (max) at VCC = +1.8V and TA = +25°C. This ultra-low quiescent current is maintained across the full -40°C to +125°C operating range, making the MAX6467XS16D3 ideal for always-on, battery-powered applications such as portable medical devices and IoT sensors where runtime is critical.

Can the MAX6467XS16D3 operate reliably when VCC drops below 1.8V?

Yes-the MAX6467XS16D3 guarantees functional operation and valid RESET output down to VCC = +1V. Below this level, the internal circuitry ceases to operate, but the open-drain RESET output remains in its last state (pulled high externally). This extended low-VCC validity ensures deterministic reset behavior during severe brownouts where competing supervisors may release reset prematurely.

What package type and pin configuration does the MAX6467XS16D3 use?

The MAX6467XS16D3 is supplied in a 4-pin SC70-4 package (2.0mm × 2.1mm footprint) with standard top-mark "AGL". Pin 1 is GND, Pin 2 is open-drain RESET, Pin 3 is MR, and Pin 4 is VCC-matching the SC70 pinout shown in Figure 1 of the datasheet. This compact package supports high-density PCB layouts in space-constrained automotive and portable designs.