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Analog Devices Inc./Maxim Integrated MAX6385XS33D3-T
- Part No.:
- MAX6385XS33D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS33D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,164
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Product details
Overview
MAX6385XS33D3-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 3.3V reset threshold (±2.5% over -40°C to +125°C), 140ms minimum VCC reset timeout, and debounced manual reset input. It monitors single supply voltage in low-power embedded systems and guarantees valid reset output down to VCC = 1V.
For engineers reviewing the MAX6385XS33D3-T datasheet, MAX6385XS33D3-T pinout, MAX6385XS33D3-T application, or MAX6385XS33D3-T equivalent, this page delivers verified electrical specs, SC70-4 package mapping, reset timing behavior, MR debounce design guidance, and direct alternatives for power-supply monitoring in battery-powered controllers and critical μP systems.
Technical Context
The MAX6385XS33D3-T implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy across temperature, paired with a monolithic RC timer for deterministic 140ms reset assertion after VCC recovery. Its internal 63kΩ MR pullup enables direct switch interfacing without external components.
This device operates as a single-supply supervisor only - it lacks auxiliary RESET IN functionality (reserved for MAX6387–MAX6389) and does not support dual-voltage monitoring. Reset assertion is triggered solely by VCC falling below 3.3V or MR being pulled low, with guaranteed logic-state validity at VCC ≥ 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.3V nominal, ±2.5% over -40°C to +125°C - ensures reliable brownout detection across automotive and industrial temperature ranges. |
| VCC Reset Timeout | 140ms minimum - holds active-high RESET high long enough to fully initialize microcontrollers after power recovery. |
| Supply Current | 3μA at +1.8V, 6μA at +3.6V - enables multi-year operation in coin-cell–powered IoT endpoints. |
| Output Type | Push-pull active-high - drives RESET directly to VCC without external pullup, simplifying PCB layout and reducing BOM count. |
| Manual Reset Input | MR with 63kΩ internal pullup - supports momentary switch connection to GND; no external resistor or debounce circuit required. |
| Operating Voltage Range | 1.0V to 5.5V - guarantees functional reset assertion even during deep brownout conditions down to 1V supply. |
| Reset Propagation Delay | 35μs max (VCC falling at 10mV/µs) - provides fast response to rapid supply collapse, preventing illegal instruction execution. |
Pinout & Package
MAX6385XS33D3-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, suitable for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary power supply input and monitored voltage source; accepts 1.0V–5.5V; powers internal circuitry and defines reset threshold reference. |
| 2 | RESET | Active-high push-pull output; drives high during reset assertion; sinks/source current per spec (VOL ≤ 0.3V @ 1.2mA, VOH ≥ 0.8×VCC). |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC via 63kΩ resistor; asserts reset when pulled ≤ 0.3×VCC (VTH < 4V). |
| 4 | GND | Ground reference for all internal comparators, timers, and output drivers; must be connected to system ground plane for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 3.3V reset threshold | Eliminates external resistor divider; reduces component count and layout area while maintaining ±2.5% accuracy over full temperature range. |
| 140ms guaranteed reset timeout | Ensures sufficient hold time for slow-starting µPs and peripherals; avoids premature release due to supply ripple or transient recovery. |
| Integrated MR pullup resistor | Enables direct connection of normally open switch to GND; removes need for external biasing and simplifies mechanical integration. |
| Valid operation down to VCC = 1V | Prevents metastable reset states during deep brownout; guarantees monotonic RESET transition as supply collapses toward zero. |
| Negative-going VCC transient immunity | Rejects sub-100ns glitches up to 100mV below threshold - suppresses false resets caused by digital switching noise on shared rails. |
Applications
| Industrial Controller Power Monitoring | Battery-Powered Sensor Node Supervision |
|---|---|
|
Use Scenario: Monitoring 3.3V I/O rail in PLC I/O module during cold start and line disturbance events. IC Role / Device Role / Timing Role: Active-high push-pull supervisor asserting RESET until stable 3.3V is confirmed for 140ms post-recovery. Use Value: Prevents firmware lockup during 120Hz AC line sags by holding µC in reset until regulated rail settles within tolerance. |
Use Scenario: Ensuring clean boot sequence in LoRaWAN end-node powered by CR2032 cell. IC Role / Device Role / Timing Role: Low-quiescent-current (3μA @ 1.8V) supervisor detecting battery voltage drop below 3.3V threshold. Use Value: Extends usable battery life beyond 5 years by eliminating leakage paths and enabling immediate shutdown upon undervoltage. |
| Medical Diagnostic Handheld Boot Integrity | Automotive Body Control Module (BCM) Reset Management |
|
Use Scenario: Validating power integrity before initializing ADC and display subsystems in portable ultrasound probe. IC Role / Device Role / Timing Role: Manual reset input (MR) tied to service button; forces known state on demand with 140ms timeout. Use Value: Enables field technician-initiated recovery without power cycle - critical for FDA-mandated fault recovery procedures. |
Use Scenario: Providing AEC-Q100-compliant reset signaling for infotainment MCU during vehicle ignition transients. IC Role / Device Role / Timing Role: 3.3V supervisor with 140ms timeout ensuring µC remains held until 5V/3.3V rails stabilize post-battery cranking. Use Value: Meets ISO 7637-2 pulse 4 immunity requirements by rejecting <100ns supply dips that would otherwise corrupt boot ROM fetch. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR33D3+T | Same 3.3V threshold and 140ms timeout, but active-low push-pull output; no MR input. | Suitable where host µP requires active-low reset assertion and manual reset is unnecessary. | Select when legacy board design uses active-low reset logic and MR functionality is unused. |
| TPS3808G33DBVR | 3.3V threshold, 200ms timeout (not 140ms); 1.8V–6.5V operating range; no integrated MR pullup. | Requires external 100kΩ pullup on MR; higher quiescent current (12μA typical at 3.6V). | Choose if longer timeout is acceptable and TI's qualification ecosystem (AEC-Q100 Grade 1) is preferred. |
Compared with MAX6385XS33D3-T, MAX6326XR33D3+T offers identical timing and threshold but inverted logic and no MR, while TPS3808G33DBVR trades tighter threshold accuracy and lower IQ for longer timeout and broader voltage range - both require layout changes due to non-pin-compatible footprints.
Availability
MAX6385XS33D3-T is available at Aetrix Electronics and suitable for industrial controllers, battery-powered sensor nodes, medical handhelds, and automotive body control modules requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6385XS33D3-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 ultra-low-power, factory-trimmed reset supervisors optimized for space- and energy-constrained embedded systems requiring guaranteed power-on reset and brownout protection.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6385XS33D3-T?
The MAX6385XS33D3-T has a factory-set nominal reset threshold of 3.3V, with guaranteed accuracy of ±2.5% over the full operating temperature range (-40°C to +125°C). This means the actual threshold falls between 3.2175V and 3.3825V at +25°C, and between 3.2175V and 3.3825V across temperature extremes - confirmed in the Electrical Characteristics table under "VCC Reset Threshold".
Does MAX6385XS33D3-T support manual reset, and how is it implemented?
Yes, MAX6385XS33D3-T includes a debounced manual reset input (MR) on Pin 3. It features an internal 63kΩ pullup resistor to VCC, allowing direct connection of a normally open switch to GND. When MR is pulled low, RESET asserts high for the full 140ms timeout period after release - no external components or debounce circuitry are required.
What package type and dimensions does MAX6385XS33D3-T use?
MAX6385XS33D3-T is supplied in a 4-pin SC70 package (outline number 21-0098), measuring 2.0mm × 2.1mm × 0.95mm. This RoHS-compliant, lead-free package uses land pattern 90-0187 and is optimized for high-density portable PCB layouts - distinct from the 3-pin SC70 used by MAX6381–MAX6383 and the 6-pin μDFN used by LT-suffixed variants.
Can MAX6385XS33D3-T operate reliably at very low supply voltages?
Yes, MAX6385XS33D3-T guarantees correct reset output logic state down to VCC = 1.0V, as specified in Absolute Maximum Ratings and Electrical Characteristics. Its internal circuitry remains functional and RESET transitions monotonically even during deep brownout - critical for fail-safe behavior in battery-depleted conditions.
Is MAX6385XS33D3-T qualified for automotive applications?
No, MAX6385XS33D3-T is not automotive-qualified. It carries the "+T" suffix indicating RoHS compliance but lacks the "/V" automotive qualification suffix. For AEC-Q100 Grade 1 applications, consider MAX6385XS33D3/V+T (if available) or alternative automotive-grade supervisors such as the TPS3808G33QDBVRQ1.
MAX6385XS33D3-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:
- 3.3V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS33D3-T FAQ
1.How can I place an order for MAX6385XS33D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS33D3-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 MAX6385XS33D3-T reliable?
The price and inventory of MAX6385XS33D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS33D3-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS33D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS33D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS33D3-T?
MAX6385XS33D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS33D3-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 MAX6385XS33D3-T?
For technical support, including MAX6385XS33D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS33D3-T requirements.
6.How does Aetrix verify that MAX6385XS33D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS33D3-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 MAX6385XS33D3-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS33D3-T?
All MAX6385XS33D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS33D3-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 MAX6385XS33D3-T part is unused and in its original packaging.
Return procedure for MAX6385XS33D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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