Analog Devices Inc./Maxim Integrated MAX6384XS17D3+T

Overview

MAX6384XS17D3+T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-low push-pull reset output, factory-set 1.67V VCC reset threshold (±2.5% over -40°C to +125°C), 140ms minimum VCC reset timeout, and debounced manual reset input (MR) with internal 63kΩ pullup. It monitors single supply voltage in battery-powered embedded systems requiring reliable power-on reset and brownout protection.

For engineers reviewing the MAX6384XS17D3+T datasheet, MAX6384XS17D3+T pinout, MAX6384XS17D3+T application, or MAX6384XS17D3+T equivalent, key selection criteria include its 4-pin SC70 package, guaranteed reset validity down to VCC = 1V, ±2.5% threshold accuracy across automotive temperature range, and MR-driven reset assertion with 200ns delay and 1µs minimum pulse width.

Technical Context

The MAX6384XS17D3+T implements a precision bandgap-based voltage comparator for VCC monitoring and an internal monostable timer for reset timeout generation. Its MR input is directly connected to the reset logic with internal pullup and 100ns glitch rejection, enabling robust manual reset initiation without external components.

This device operates as a single-supply supervisor with no auxiliary voltage monitor (RESET IN) or dual-threshold capability. Its push-pull active-low RESET output drives high-impedance loads with VOL ≤ 0.3V at ISINK = 1.2mA (VCC ≥ 2.5V) and guarantees correct logic state down to VCC = 1V.

Key Specifications

Pinout & Package

MAX6384XS17D3+T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm, optimized for space-constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326XR26D3+T, MAX6384XS17D3+T adds MR functionality in a 4-pin SC70; versus TPS3808G16DBVR, it trades threshold accuracy and timeout length for 75% lower supply current and smaller package-critical for compact, battery-operated systems.

Availability

MAX6384XS17D3+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart energy meters requiring stable component supply with automotive-grade temperature performance and long-term lifecycle support.

Supply support for MAX6384XS17D3+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

Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for demanding industrial, automotive, and computing applications, emphasizing low power, high reliability, and small form factor.

The MAX6381–MAX6390 family delivers single/dual low-voltage microprocessor supervisory circuits targeting space- and power-constrained embedded systems where deterministic reset behavior across extreme temperatures is mandatory.

FAQ

What is the exact reset threshold voltage of MAX6384XS17D3+T and how stable is it over temperature?

The MAX6384XS17D3+T has a nominal VCC reset threshold of 1.67V, with guaranteed tolerance of ±2.5% over the full operating range of -40°C to +125°C. This stability is achieved through factory laser trimming of internal resistive dividers and bandgap reference compensation, ensuring consistent brownout detection without external calibration. The MAX6384XS17D3+T maintains this accuracy without requiring derating or guard-banding in thermal design.

Does MAX6384XS17D3+T support manual reset, and what are the electrical requirements for the MR pin?

Yes, MAX6384XS17D3+T features a debounced manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. To assert reset, MR must be driven below 0.3×VCC (for VTH < 4V) for ≥1µs; the device rejects glitches shorter than 100ns. MR can interface directly with open-drain logic or momentary switches to GND. The MAX6384XS17D3+T guarantees MR-to-RESET delay of 200ns, enabling fast, deterministic manual intervention.

What package type and dimensions does MAX6384XS17D3+T use, and is it RoHS-compliant?

MAX6384XS17D3+T uses a 4-pin SC70 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm with 0.65mm lead pitch. The "+T" suffix confirms lead(Pb)-free and RoHS-compliant construction. This package supports reflow soldering per JEDEC J-STD-020 (peak 260°C) and offers thermal resistance θJA = 322.6°C/W on multilayer boards - critical for thermal management in sealed enclosures. The MAX6384XS17D3+T's compact size enables placement near µP reset pins to minimize noise pickup.

How does the reset timeout period of MAX6384XS17D3+T behave across temperature and supply voltage?

The MAX6384XS17D3+T guarantees a minimum reset timeout of 140ms at -40°C to +125°C, with normalized variation ≤ ±1.5% across temperature (per typical curve toc03). Supply voltage changes from 1.8V to 5.5V cause negligible shift in timeout duration due to internal voltage-regulated timing circuitry. This stability ensures consistent reset hold time regardless of battery discharge or LDO tolerance - a key requirement verified in the MAX6384XS17D3+T's production test flow.

Can MAX6384XS17D3+T monitor a second voltage rail, and what alternatives exist if dual-rail supervision is needed?

No, MAX6384XS17D3+T monitors only the VCC rail and lacks RESET IN functionality. Dual-rail supervision requires devices like MAX6387XS17D3+T (which adds auxiliary comparator with 1.27V reference) or MAX6389 series. Those parts use external resistor dividers on RESET IN to set secondary thresholds, while MAX6384XS17D3+T is strictly single-rail. For designs needing both rails supervised, pairing MAX6384XS17D3+T with a discrete voltage detector is not recommended - instead, select MAX6387/MAX6389 variants to maintain timing correlation and reduce component count.