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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Analog Devices Inc./Maxim Integrated MAX6385XS32D7-T

Name: MAX6385XS32D7-T
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX6385XS32D7-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX6385XS32D7-T

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Supervisors

Package:: SC-82A, SOT-343

Datasheet:: MAX6385XS32D7-T.pdf

Description:: IC SUPERVISOR 1 CHANNEL SC70-4

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Product details

Overview

MAX6385XS32D7-T from Maxim Integrated is a low-power, active-high push-pull μP supervisory circuit with factory-set 3.20V reset threshold, 1200ms V_CC reset timeout, and debounced manual reset input (MR). It monitors +1.8V to +5.0V supply rails, consumes only 3μA at +1.8V, guarantees valid reset output down to V_CC = 1V, and operates across –40°C to +125°C for use in battery-powered microcontroller systems requiring reliable power-on reset and brownout protection.

For engineers reviewing the MAX6385XS32D7-T datasheet, MAX6385XS32D7-T pinout, MAX6385XS32D7-T application, or MAX6385XS32D7-T equivalent, key selection criteria include its 3.20V ±2.5% threshold accuracy over temperature, 1200ms minimum reset timeout, MR input with internal 63kΩ pullup, 4-pin SC70 package, and compatibility with dual-voltage monitoring systems where auxiliary reset capability is not required.

Technical Context

The MAX6385XS32D7-T implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy over –40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a guaranteed-minimum 1200ms reset assertion after V_CC rises above 3.20V, independent of supply ramp rate.

It features an active-high push-pull RESET output capable of sourcing 500µA at V_CC ≥ 2.5V while maintaining VOH ≥ 0.8×V_CC, and includes a debounced MR input with 1µs minimum pulse width support and 100ns glitch rejection - all within a 4-pin SC70 footprint optimized for space-constrained embedded designs.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold	3.20V ±2.5% over –40°C to +125°C - ensures deterministic reset activation during brownout at nominal 3.3V I/O rail
V_CC Reset Timeout	1200ms minimum - holds processor in reset long enough for power stabilization and clock lock in MCU boot sequences
Supply Current	3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors without compromising supervision integrity
Operating Voltage Range	+1.0V to +5.5V - supports valid reset assertion even during deep brownout down to 1V, critical for fail-safe shutdown
MR Input Pullup	63kΩ internal resistor - eliminates external components for momentary switch interface; compatible with CMOS/TTL logic drive
RESET Output Type	Active-high push-pull - drives high-impedance loads directly without external pullup; sinks 1.2mA at V_CC ≥ 2.5V
Package	4-pin SC70 (X4+1 outline) - 1.6mm × 1.6mm footprint with 0.65mm pitch, suitable for high-density PCB layouts

Pinout & Package

MAX6385XS32D7-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), featuring exposed pad thermal enhancement and JEDEC-standard soldering profiles (reflow @ +260°C).

Pin	Circuit Role	Design Meaning
1	V_CC	Primary supply input and monitored voltage rail; powers internal circuitry and enables reset detection on this node
2	RESET	Active-high push-pull output; asserts high during reset condition and deasserts low after timeout - directly interfaces with μP RESET pin
3	MR	Active-low manual reset input; initiates reset when pulled low; internal 63kΩ pullup allows NC or V_CC tie when unused
4	GND	Analog/digital ground reference; must be connected to system ground plane for accurate threshold sensing and noise immunity

Key Features

Feature	Design Value
Factory-trimmed 3.20V threshold	Eliminates external resistor networks for 3.3V system supervision; reduces BOM count and layout area
1200ms minimum reset timeout	Ensures sufficient hold time for slow-ramping supplies and PLL lock in ARM Cortex-M or RISC-V SoCs
MR input with internal pullup	Supports direct connection to tactile switch or FPGA GPIO without external biasing components
±2.5% threshold accuracy over temp	Maintains reliable reset margin across automotive under-hood or industrial ambient conditions
Valid RESET down to V_CC = 1V	Prevents spurious release during deep undervoltage events, enabling controlled graceful shutdown

Applications

Industrial PLC Controller	Battery-Powered Sensor Node
Use Scenario: Supervises 3.3V I/O and 1.8V core rails in programmable logic controller CPU module during cold start and line transients. IC Role / Device Role / Timing Role: μP reset supervisor asserting active-high signal to ARM Cortex-A53 reset pin for deterministic boot initialization. Use Value: 3.20V threshold matches 3.3V rail tolerance; 1200ms timeout accommodates FPGA configuration time and peripheral power sequencing.	Use Scenario: Monitors coin-cell–supplied 3.0V rail in LoRaWAN end-node during periodic wake-up cycles and RF transmission bursts. IC Role / Device Role / Timing Role: Low-quiescent-current supervisor ensuring MCU remains held in reset until stable supply is confirmed post-wakeup. Use Value: 3μA supply current extends 10-year battery life; MR pin enables firmware-triggered watchdog reset via GPIO.
Medical Diagnostic Handheld	Automotive Body Control Module
Use Scenario: Provides fail-safe reset for ARM-based diagnostic imager during battery insertion and USB charging transitions. IC Role / Device Role / Timing Role: Active-high push-pull supervisor interfacing directly with reset input of medical-grade SoC with no external pullup required. Use Value: Valid RESET down to V_CC = 1V prevents premature release during Li-ion battery sag; SC70 package fits compact front-panel PCB.	Use Scenario: Supervises 3.3V microcontroller supply in BCM subassembly exposed to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: AEC-Q100–qualified reset IC (via /V variant) delivering robust brownout detection in automotive ambient (-40°C to +125°C). Use Value: ±2.5% threshold accuracy ensures consistent trip point despite temperature drift; negative-going transient immunity suppresses false resets during alternator noise.

Industrial PLC Controller

Battery-Powered Sensor Node

Use Scenario: Supervises 3.3V I/O and 1.8V core rails in programmable logic controller CPU module during cold start and line transients.

IC Role / Device Role / Timing Role: μP reset supervisor asserting active-high signal to ARM Cortex-A53 reset pin for deterministic boot initialization.

Use Value: 3.20V threshold matches 3.3V rail tolerance; 1200ms timeout accommodates FPGA configuration time and peripheral power sequencing.

Use Scenario: Monitors coin-cell–supplied 3.0V rail in LoRaWAN end-node during periodic wake-up cycles and RF transmission bursts.

IC Role / Device Role / Timing Role: Low-quiescent-current supervisor ensuring MCU remains held in reset until stable supply is confirmed post-wakeup.

Use Value: 3μA supply current extends 10-year battery life; MR pin enables firmware-triggered watchdog reset via GPIO.

Medical Diagnostic Handheld

Automotive Body Control Module

Use Scenario: Provides fail-safe reset for ARM-based diagnostic imager during battery insertion and USB charging transitions.

IC Role / Device Role / Timing Role: Active-high push-pull supervisor interfacing directly with reset input of medical-grade SoC with no external pullup required.

Use Value: Valid RESET down to V_CC = 1V prevents premature release during Li-ion battery sag; SC70 package fits compact front-panel PCB.

Use Scenario: Supervises 3.3V microcontroller supply in BCM subassembly exposed to load-dump and cold-crank conditions.

IC Role / Device Role / Timing Role: AEC-Q100–qualified reset IC (via /V variant) delivering robust brownout detection in automotive ambient (-40°C to +125°C).

Use Value: ±2.5% threshold accuracy ensures consistent trip point despite temperature drift; negative-going transient immunity suppresses false resets during alternator noise.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX6385XS32D4-T	Same 3.20V threshold and MR input, but 1120ms V_CC reset timeout (vs. 1200ms)	Suitable where slightly shorter reset hold time is acceptable for faster boot sequences	Select when 1120ms meets system timing margin and stock availability favors D4 suffix
TPS3808G33DBVR	3.3V threshold (±0.5%), 1200ms timeout, 1.8–6.0V operating range, but no MR input	Lacks manual reset functionality; requires external circuitry for operator-initiated reset	Choose if MR is unnecessary and tighter threshold accuracy (±0.5%) is prioritized over feature parity

Compared with MAX6385XS32D7-T, the MAX6385XS32D4-T offers identical functionality with reduced timeout duration, while the TPS3808G33DBVR trades MR capability for higher threshold precision and broader voltage range - making the MAX6385XS32D7-T optimal for applications needing both precise 3.20V supervision and integrated manual reset in minimal area.

Availability

MAX6385XS32D7-T is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered sensor nodes, medical handheld diagnostics, and automotive body control modules requiring stable component supply, long-term lifecycle support, and AEC-Q100–compliant variants.

Supply support for MAX6385XS32D7-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 in demanding industrial, automotive, and medical applications.

The MAX6381–MAX6390 family delivers ultra-low-power, factory-trimmed μP supervisors targeting space- and energy-constrained embedded systems requiring guaranteed reset behavior across wide temperature ranges.

FAQ

What is the exact reset threshold voltage of MAX6385XS32D7-T and how tightly is it specified?

The MAX6385XS32D7-T has a factory-set reset threshold of 3.20V, specified with ±2.5% accuracy over the full operating temperature range of –40°C to +125°C. This means the actual threshold falls between 3.12V and 3.28V at any temperature within that range, ensuring reliable brownout detection for 3.3V systems without requiring calibration or external components.

Does MAX6385XS32D7-T support manual reset, and what are the electrical requirements for the MR pin?

Yes, MAX6385XS32D7-T includes a debounced manual reset input (MR) with an internal 63kΩ pullup resistor to V_CC. The MR pin is active-low: driving it below 0.3×V_CC (for V_TH < 4V) asserts reset. It accepts TTL/CMOS logic levels and supports minimum pulse widths of 1µs, making it compatible with microcontroller GPIOs or momentary switches without external debounce circuitry.

What is the guaranteed minimum reset timeout period for MAX6385XS32D7-T, and how is it triggered?

The MAX6385XS32D7-T guarantees a minimum reset timeout period of 1200ms (D7 suffix) after V_CC rises above the 3.20V threshold. This timeout begins upon V_CC crossing the threshold and is generated by an internal oscillator-based timer - independent of supply ramp rate - ensuring consistent hold time for processor initialization and peripheral stabilization.

Can MAX6385XS32D7-T operate reliably at very low supply voltages, and what is its minimum functional V_CC?

Yes, MAX6385XS32D7-T guarantees valid RESET output state down to V_CC = 1.0V, meaning the active-high push-pull output remains logically correct (high during reset, low otherwise) even as supply collapses. Its operating voltage range extends from +1.0V to +5.5V, and it draws only 3μA at +1.8V - enabling robust supervision in ultra-low-power and brownout scenarios.

What package type and footprint does MAX6385XS32D7-T use, and are PCB layout resources available?

MAX6385XS32D7-T uses a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 1.6mm × 1.6mm with 0.65mm pin pitch. Maxim provides verified land patterns and thermal guidelines online; the package supports standard reflow profiles (peak +260°C) and is RoHS-compliant (+ suffix). No exposed pad is present in this variant.

MAX6385XS32D7-T Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:: SC-82A, SOT-343

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 3.2V

Output:: Push-Pull, Totem Pole

Reset:: Active High

Reset Timeout:: 1.2s Minimum

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-70-4

MAX6385XS32D7-T FAQ

1.How can I place an order for MAX6385XS32D7-T through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX6385XS32D7-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MAX6385XS32D7-T reliable?

The price and inventory of MAX6385XS32D7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS32D7-T is usually 5 days.

3.What payment methods are accepted for MAX6385XS32D7-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS32D7-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX6385XS32D7-T?

MAX6385XS32D7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX6385XS32D7-T order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MAX6385XS32D7-T?

For technical support, including MAX6385XS32D7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS32D7-T requirements.

6.How does Aetrix verify that MAX6385XS32D7-T is sourced from the original manufacturer or authorized distributors?

All MAX6385XS32D7-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX6385XS32D7-T meets industry standards.

7.What is the process for return or replacement of MAX6385XS32D7-T?

All MAX6385XS32D7-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS32D7-T, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MAX6385XS32D7-T part is unused and in its original packaging.

Return procedure for MAX6385XS32D7-T:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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