Analog Devices Inc./Maxim Integrated MAX6385XS46D5-T

Overview

MAX6385XS46D5-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 4.63V reset threshold (±2.5% over −40°C to +125°C), 280ms 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 MAX6385XS46D5-T datasheet, MAX6385XS46D5-T pinout, MAX6385XS46D5-T application, or MAX6385XS46D5-T equivalent, key selection factors include its 4-pin SC70 package, 3μA supply current at 1.8V, guaranteed reset validity down to VCC = 1V, and compatibility with manual reset switch interfaces requiring no external debounce.

Technical Context

The MAX6385XS46D5-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 280ms minimum reset assertion period after VCC rises above 4.63V.

It features an active-high push-pull RESET output that drives high during reset assertion and low otherwise, plus a dedicated MR input with internal 63kΩ pullup resistor - enabling direct connection to momentary switches without external components.

Key Specifications

Pinout & Package

MAX6385XS46D5-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, 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 MAX6385XS46D5-T, the μDFN variant offers identical functionality in a thermally robust package but increases board area by ~40%, while the TPS3808G33DBVR serves lower-voltage applications without manual reset capability - neither provides drop-in replacement for 4.63V + MR requirements.

Availability

MAX6385XS46D5-T is available at Aetrix Electronics and suitable for industrial controllers, medical wearables, automotive body electronics, and smart home hubs requiring stable component supply with guaranteed long-term availability.

Supply support for MAX6385XS46D5-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, factory-trimmed supervisory circuits targeting space- and energy-constrained embedded systems needing reliable reset generation without external components.

FAQ

What is the exact reset threshold voltage of MAX6385XS46D5-T and how tightly is it specified?

The MAX6385XS46D5-T has a nominal reset threshold of 4.63V, with guaranteed limits of 4.51V (min) and 4.74V (max) at +25°C. Over the full operating temperature range of −40°C to +125°C, the threshold remains within ±2.5% of nominal, corresponding to 4.51V to 4.74V. This tight specification eliminates need for external trimming and ensures consistent brownout detection across environmental conditions.

Does MAX6385XS46D5-T support manual reset, and what are the interface requirements?

Yes, MAX6385XS46D5-T includes a dedicated MR (manual reset) input with an internal 63kΩ pullup resistor to VCC. To assert reset, drive MR to GND or below 0.3×VCC for ≥1µs. The input rejects glitches <100ns and requires no external debounce components. When unused, MR may be left floating or tied to VCC - no external pullup is needed due to the integrated resistor.

What is the function and timing behavior of the RESET output on MAX6385XS46D5-T?

The RESET output of MAX6385XS46D5-T is an active-high push-pull driver. It goes high when VCC falls below 4.63V or MR is asserted, and remains high for a minimum of 280ms after VCC rises above threshold or MR is released. RESET is guaranteed valid down to VCC = 1.0V, and can sink/source up to 20mA, enabling direct connection to most microcontroller reset inputs without level-shifting or pullup resistors.

Can MAX6385XS46D5-T operate from a 1.8V supply, and what is its current consumption at that voltage?

Yes, MAX6385XS46D5-T operates across 1.0V to 5.5V. At VCC = 1.8V and TA = +25°C, its typical supply current is 3μA, with a maximum of 6μA over temperature. This ultra-low quiescent current makes it suitable for battery-powered applications where multi-year operation is required, such as wireless sensor nodes or portable medical devices.

Is MAX6385XS46D5-T qualified for automotive applications, and what packaging options support that qualification?

MAX6385XS46D5-T itself is not automotive-qualified; the /V suffix denotes AEC-Q100 qualification (e.g., MAX6385XS46D5/V+T). The standard MAX6385XS46D5-T uses a lead-free 4-pin SC70 package (RoHS-compliant) rated for −40°C to +125°C operation, meeting industrial and extended commercial requirements. For automotive use, the /V version must be selected and sourced separately.