Analog Devices Inc./Maxim Integrated MAX6385XS32D6-T

Overview

MAX6385XS32D6-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 3.20V reset threshold (±2.5% over –40°C to +125°C), 560ms minimum VCC reset timeout, and debounced manual reset input. It monitors single supply voltage in battery-powered embedded systems where reliable power-on reset and brownout protection are critical.

For engineers reviewing the MAX6385XS32D6-T datasheet, MAX6385XS32D6-T pinout, MAX6385XS32D6-T application, or MAX6385XS32D6-T equivalent, key selection factors include its 3μA supply current at 1.8V, guaranteed reset validity down to VCC = 1V, 4-pin SC70 package footprint, and compatibility with manual reset switch integration without external debounce.

Technical Context

The MAX6385XS32D6-T implements a precision bandgap-based reset comparator with ±2.5% threshold accuracy across –40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a fixed 560ms minimum reset assertion period after VCC recovers above 3.20V.

It features an internally pulled-up manual reset input (MR) with 63kΩ pullup resistance, supporting TTL/CMOS logic drive and momentary switch interface. The active-high push-pull RESET output drives high during fault conditions and guarantees valid logic state for VCC ≥ 1V.

Key Specifications

Pinout & Package

MAX6385XS32D6-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 1.3mm × 1.1mm × 0.6mm with gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6385XS32D3-T and TLV803EC32DBZR, the MAX6385XS32D6-T uniquely balances extended reset hold time (560ms) with integrated manual reset functionality in a compact 4-pin SC70, making it optimal for field-serviceable embedded devices requiring both power-fail and operator-initiated reset.

Availability

MAX6385XS32D6-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 and long-term production continuity.

Supply support for MAX6385XS32D6-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.

The MAX6381–MAX6390 family delivers low-power, high-accuracy reset supervision for battery-operated and thermally harsh systems, with variants optimized for single/dual supply monitoring, manual reset, and automotive qualification.

FAQ

What is the exact reset threshold voltage of MAX6385XS32D6-T and how stable is it over temperature?

The MAX6385XS32D6-T has a factory-set nominal reset threshold of 3.20V, with guaranteed accuracy of ±2.5% over the full operating temperature range of –40°C to +125°C. Its temperature coefficient is 60ppm/°C, meaning the threshold drifts less than 10mV across a 100°C span. This stability is achieved through laser-trimmed bandgap reference circuitry and is fully specified in the Electrical Characteristics table of the MAX6385XS32D6-T datasheet.

Does MAX6385XS32D6-T support manual reset, and what are the electrical requirements for the MR pin?

Yes, MAX6385XS32D6-T includes 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 a minimum pulse width of 1μs. The pin rejects glitches as short as 100ns and features 200ns propagation delay from MR low to RESET high. No external components are required for basic switch interfacing.

What is the function of the RESET output on MAX6385XS32D6-T, and how does it behave during brownout?

The RESET output of MAX6385XS32D6-T is an active-high push-pull driver. During normal operation (VCC > 3.20V), RESET is logic low. When VCC falls below the 3.20V threshold, RESET immediately goes high and remains high for a minimum of 560ms after VCC rises back above threshold. This behavior ensures the connected microprocessor remains held in reset long enough to complete power stabilization and avoid corrupted startup sequences.

Can MAX6385XS32D6-T operate reliably at very low supply voltages, and what is its minimum functional VCC?

Yes, MAX6385XS32D6-T guarantees correct reset output logic state down to VCC = 1.0V, as explicitly stated in the Absolute Maximum Ratings and Electrical Characteristics tables. Below 1.0V, the device may not maintain valid output levels, but the 1.0V lower limit ensures robust operation during deep brownout events common in battery discharge profiles. Its supply current remains only 3μA at 1.8V, supporting ultra-low-power design goals.

What package type and footprint does MAX6385XS32D6-T use, and are there compatible land patterns available?

MAX6385XS32D6-T uses a 4-pin SC70 package (outline number 21-0098, package code X4+1), with dimensions 1.3mm × 1.1mm × 0.6mm. Maxim provides the official land pattern number 90-0187 for PCB layout. This footprint is incompatible with 3-pin SC70 or 6-pin μDFN variants in the same family, and requires dedicated stencil design due to its gull-wing lead geometry and fine pitch.