Analog Devices Inc./Maxim Integrated MAX6385XS20D5-T

Overview

MAX6385XS20D5-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 2.0V reset threshold, 280ms minimum VCC reset timeout, and manual reset input. It monitors single-supply voltages from +1.8V to +5.0V while consuming only 3μA at +1.8V, and guarantees valid reset output down to VCC = 1V. Used in portable battery-powered equipment for reliable power-on reset and brownout protection.

For engineers reviewing the MAX6385XS20D5-T datasheet, MAX6385XS20D5-T pinout, MAX6385XS20D5-T application, or MAX6385XS20D5-T equivalent, key selection criteria include reset threshold accuracy (±2.5% over −40°C to +125°C), MR input pulse width (≥1µs), glitch rejection (100ns), guaranteed operation down to VCC = 1V, and compatibility with 4-pin SC70 layout constraints.

Technical Context

The MAX6385XS20D5-T implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy over temperature and 60ppm/°C tempco. Its internal timer generates a fixed 280ms minimum reset timeout after VCC rises above 2.0V or after release of the active-low manual reset (MR) input.

It features an internal 63kΩ pullup resistor on MR, supports TTL/CMOS logic drive, and asserts active-high RESET when VCC falls below 2.0V or MR is pulled low. RESET remains high for the full timeout period before deasserting, ensuring μP initialization stability during power transitions.

Key Specifications

Pinout & Package

MAX6385XS20D5-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 portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6385XS20D3-T, the MAX6385XS20D5-T provides double the reset timeout for robustness in slower power systems; versus TPS3808G12DBVR, it eliminates the external MR pullup resistor and delivers lower quiescent current at ultra-low VCC, simplifying design for battery-critical applications.

Availability

MAX6385XS20D5-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, industrial controllers, intelligent instruments, and critical μP power monitoring requiring stable component supply and long-term lifecycle assurance.

Supply support for MAX6385XS20D5-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, mixed-signal, and power management ICs for demanding industrial, automotive, and computing applications.

The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy supervisory circuits for microprocessor reset in space- and energy-constrained systems, emphasizing factory-trimmed thresholds, guaranteed timing, and robust transient immunity.

FAQ

What is the exact reset threshold voltage and tolerance for MAX6385XS20D5-T?

The MAX6385XS20D5-T has a factory-set nominal reset threshold of 2.0V, with guaranteed accuracy of ±2.5% over the full operating temperature range of −40°C to +125°C. This means the actual threshold falls between 1.95V and 2.05V at +25°C, and between 1.90V and 2.10V across temperature extremes - critical for reliable brownout detection in battery-powered systems.

Does MAX6385XS20D5-T support manual reset, and how is the MR pin configured?

Yes, MAX6385XS20D5-T includes an active-low manual reset (MR) input with an internal 63kΩ pullup resistor to VCC. The MR pin requires no external components: connect a momentary switch between MR and GND to initiate reset. MR accepts TTL/CMOS logic levels and features 100ns glitch rejection, making MAX6385XS20D5-T suitable for noisy industrial environments.

What is the reset timeout duration for MAX6385XS20D5-T, and is it guaranteed minimum or typical?

The MAX6385XS20D5-T provides a guaranteed minimum reset timeout of 280ms after VCC rises above the 2.0V threshold or after MR is released. This is a minimum specification - actual timeout may be longer due to process variation, but will never fall short, ensuring μP firmware has sufficient time to initialize before execution begins.

Can MAX6385XS20D5-T operate reliably at very low supply voltages?

Yes, MAX6385XS20D5-T guarantees correct reset output state down to VCC = 1.0V, and functions across a full supply range of +1.0V to +5.5V. Its 3μA supply current at +1.8V and valid reset signaling at 1V enable robust operation during deep battery discharge - a key advantage over competitors that fail below 1.6V.

What package type and footprint does MAX6385XS20D5-T use, and is it RoHS-compliant?

MAX6385XS20D5-T uses a 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. The "+T" suffix confirms it is lead(Pb)-free and RoHS-compliant. This compact, surface-mount package supports high-density layouts in portable and wearable electronics without requiring special assembly processes.