Analog Devices Inc./Maxim Integrated MAX6385XS29D2-T

Overview

MAX6385XS29D2-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.93V reset threshold (±2.5% over -40°C to +125°C), and 20ms minimum reset timeout period. It monitors VCC from +1.8V to +5.5V while consuming only 3µA at +1.8V, and features a debounced manual reset input (MR) with internal 63kΩ pullup - used in portable battery-powered equipment for reliable power-on reset and brownout protection.

For engineers reviewing the MAX6385XS29D2-T datasheet, MAX6385XS29D2-T pinout, MAX6385XS29D2-T application, or MAX6385XS29D2-T equivalent, key selection criteria include its 4-pin SC70 package, guaranteed reset validity down to VCC = 1V, ±2.5% threshold accuracy over temperature, and compatibility with systems requiring fast 20ms reset assertion after power recovery.

Technical Context

The MAX6385XS29D2-T implements a precision bandgap-based voltage comparator with hysteresis to detect VCC drops below 2.93V, triggering an active-high push-pull RESET signal that remains asserted for ≥20ms after VCC recovers. Its MR input accepts TTL/CMOS logic levels and forces reset when pulled low, with internal pullup ensuring default high state.

Designed for single-supply monitoring, it lacks auxiliary RESET IN functionality (unlike MAX6387–MAX6389) and does not support dual-voltage monitoring. The device guarantees correct RESET logic state down to VCC = 1V and exhibits immunity to negative-going VCC transients up to 35µs at 100mV overdrive.

Key Specifications

Pinout & Package

MAX6385XS29D2-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 MAX809TRD2-T, MAX6385XS29D2-T offers shorter 20ms timeout and MR input but uses a 4-pin SC70; versus TPS3808G33DBVR, it provides tighter threshold accuracy (±2.5% vs ±3%) and lower quiescent current (3µA vs 12µA), at the cost of no watchdog function.

Availability

MAX6385XS29D2-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart home hub power management requiring stable component supply and long-term lifecycle support.

Supply support for MAX6385XS29D2-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 industrial, automotive, and computing applications.

The MAX6381–MAX6390 family delivers ultra-low-power, factory-trimmed reset supervisors targeting battery-operated and thermally demanding systems where supply voltage monitoring reliability is critical.

FAQ

What is the reset threshold voltage of the MAX6385XS29D2-T?

The MAX6385XS29D2-T has a factory-set reset threshold of 2.93V, specified with ±2.5% accuracy over the full operating temperature range of -40°C to +125°C. This value is trimmed during production and does not require external components. The threshold is referenced to the VCC supply, and the device asserts RESET when VCC falls below this level. The MAX6385XS29D2-T datasheet confirms this value in the Reset Thresholds table under suffix "29".

Does the MAX6385XS29D2-T support manual reset functionality?

Yes, the MAX6385XS29D2-T includes a debounced manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. Driving MR low forces an active-high RESET assertion for the full 20ms timeout period, even if VCC remains stable. The MR pin accepts standard TTL/CMOS logic levels and requires no external debounce circuitry. This feature is explicitly documented in the Pin Description and Features sections of the MAX6385XS29D2-T datasheet.

What package type is used for the MAX6385XS29D2-T?

The MAX6385XS29D2-T is supplied in a 4-pin SC70 package (outline number 21-0098), measuring 2.0mm × 2.1mm × 0.95mm, with RoHS-compliant lead-free finish denoted by the "+T" suffix. This compact surface-mount package supports high-density PCB layouts and is compatible with standard reflow soldering profiles. The package code "X4+1" and land pattern "90-0187" are specified in the MAX6385XS29D2-T ordering information.

What is the supply current consumption of the MAX6385XS29D2-T at 1.8V?

The MAX6385XS29D2-T consumes only 3µA of supply current at VCC = +1.8V and TA = +25°C, rising to 6µA maximum across temperature and voltage extremes. This ultra-low quiescent current enables multi-year operation in energy-harvesting and battery-backed applications. The value is confirmed in the Electrical Characteristics table under "VCC Supply Current" with condition "VCC = 1.8V, no load".

Is the MAX6385XS29D2-T compatible with AEC-Q100 automotive qualification?

No, the MAX6385XS29D2-T is not AEC-Q100 qualified. While the MAX6381–MAX6390 family includes automotive-grade variants (denoted by "/V" suffix in ordering codes such as MAX6385XS29D2/V+T), the MAX6385XS29D2-T lacks the "/V" designation and is rated for industrial temperature range (-40°C to +125°C) without automotive qualification testing. For automotive applications, engineers must select the /V variant and verify compliance with AEC-Q100 Grade 2 or 3 requirements.