Analog Devices Inc./Maxim Integrated MAX6384XS26D3+T

Overview

MAX6384XS26D3+T from Maxim Integrated is a low-power microprocessor supervisory circuit with factory-set 2.63V reset threshold, 140ms minimum VCC reset timeout, and active-low push-pull reset output. It monitors +1.8V to +5.0V supply rails, consumes only 3μA at +1.8V, and guarantees valid reset state down to VCC = 1V. Used in portable battery-powered equipment for reliable power-on reset and brownout protection.

For engineers reviewing the MAX6384XS26D3+T datasheet, MAX6384XS26D3+T pinout, MAX6384XS26D3+T application, or MAX6384XS26D3+T equivalent, key selection criteria include reset threshold accuracy (±2.5% over −40°C to +125°C), manual reset input with internal 63kΩ pullup, 4-pin SC70 package footprint, and compatibility with dual-voltage system monitoring requirements.

Technical Context

The MAX6384XS26D3+T implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy across −40°C to +125°C, paired with a temperature-stable monostable timer for 140ms minimum reset assertion after VCC recovery. Its reset logic asserts on VCC falling below 2.63V and holds active for the full timeout regardless of transient recovery.

It features a debounced manual reset input (MR) with 1μs minimum pulse width support and 100ns glitch rejection, internally pulled up to VCC via 63kΩ resistor. The active-low push-pull RESET output drives low during fault conditions and guarantees VOL ≤ 0.3V at ISINK = 1.2mA (VCC ≥ 2.5V), ensuring robust interface with μP reset inputs.

Key Specifications

Pinout & Package

MAX6384XS26D3+T uses a 4-pin SC70 package (outline 21-0098, land pattern 90-0187), optimized for space-constrained portable designs. Pin 1 = VCC, Pin 2 = RESET, Pin 3 = MR, Pin 4 = GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326XR26D3+T and TLV809E26DBZR, the MAX6384XS26D3+T uniquely integrates MR with internal pullup in a 4-pin SC70, enabling compact, component-free manual reset while maintaining identical timing and threshold specs-ideal for field-upgradable embedded systems.

Availability

MAX6384XS26D3+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, critical μP and μC power monitoring, and dual voltage systems requiring stable component supply across automotive and industrial temperature ranges.

Supply support for MAX6384XS26D3+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 power, sensing, and connectivity applications, with emphasis on low-power, high-reliability solutions.

The MAX6381–MAX6390 family delivers single/dual low-voltage supervisory circuits optimized for battery-operated, space-constrained, and thermally demanding systems requiring guaranteed reset behavior across extended temperature ranges.

FAQ

What is the exact reset threshold voltage of MAX6384XS26D3+T and how stable is it over temperature?

The MAX6384XS26D3+T has a factory-trimmed nominal reset threshold of 2.63V, with guaranteed accuracy of ±2.5% over the full operating temperature range of −40°C to +125°C. This stability is achieved through laser-trimmed bandgap reference circuitry and is confirmed in the Electrical Characteristics table of the official datasheet. The MAX6384XS26D3+T maintains this precision without requiring external calibration components.

Does MAX6384XS26D3+T support manual reset, and what are the electrical requirements for the MR pin?

Yes, the MAX6384XS26D3+T includes a dedicated active-low 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). It accepts TTL/CMOS logic levels and supports minimum pulse widths of 1μs with 100ns glitch rejection. The MAX6384XS26D3+T guarantees correct MR operation across its full −40°C to +125°C temperature range.

What package type and footprint does MAX6384XS26D3+T use, and is it RoHS-compliant?

The MAX6384XS26D3+T is supplied in a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. The "+T" suffix confirms lead(Pb)-free and RoHS-compliant construction. This compact footprint enables high-density PCB layouts in portable and wearable electronics where board space is constrained. The MAX6384XS26D3+T's SC70 package is pin-compatible with other members of the MAX6384–MAX6390 series in the same form factor.

How does the reset timeout behavior differ between VCC recovery and manual reset release on MAX6384XS26D3+T?

The MAX6384XS26D3+T provides identical 140ms minimum timeout duration for both VCC recovery and MR release events. When VCC rises above 2.63V or MR transitions from low to high, the RESET output remains asserted for ≥140ms before deasserting. This uniform timing simplifies system-level timing budgeting and ensures consistent μP initialization behavior regardless of reset trigger source. The MAX6384XS26D3+T does not differentiate timeout values between these two activation modes.

Can MAX6384XS26D3+T monitor a second voltage rail, and if not, what alternative should be considered?

No, the MAX6384XS26D3+T monitors only the VCC rail and does not include an auxiliary RESET IN input. For dual-rail monitoring, consider the MAX6387XS26D3+T (same 2.63V threshold and 140ms timeout), which adds a high-impedance RESET IN pin compared against an internal 1.27V reference-enabling user-defined secondary threshold via external resistor divider. The MAX6384XS26D3+T is strictly a single-supply supervisor; its pinout and internal architecture lack RESET IN functionality.