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Analog Devices Inc./Maxim Integrated MAX6385XS46D7-T
- Part No.:
- MAX6385XS46D7-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS46D7-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,490
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Product details
Overview
MAX6385XS46D7-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 4.63V reset threshold, 1200ms VCC reset timeout, and manual reset input. It monitors +1.8V to +5.0V supply rails, consumes only 3μA at +1.8V, and guarantees valid reset output down to VCC = 1V. Used in battery-powered controllers and industrial embedded systems requiring reliable power-on reset.
For engineers reviewing the MAX6385XS46D7-T datasheet, MAX6385XS46D7-T pinout, MAX6385XS46D7-T application, or MAX6385XS46D7-T equivalent, key selection factors include its active-high push-pull output, 4.63V ±2.5% threshold accuracy over –40°C to +125°C, 1200ms minimum VCC reset timeout, manual reset debounce capability, and 4-pin SC70 package compatibility with space-constrained designs.
Technical Context
The MAX6385XS46D7-T implements a precision voltage comparator with internal 4.63V reference and a monostable timer for reset assertion. Its active-high push-pull output drives high during reset and low otherwise, eliminating need for external pullup resistors. The MR input features an internal 63kΩ pullup and supports TTL/CMOS logic levels.
Reset assertion occurs when VCC falls below 4.63V (±2.5% over temperature) or MR is pulled low; reset remains asserted for ≥1200ms after VCC recovers or MR is released. The device operates from 1.0V to 5.5V and maintains guaranteed logic state down to VCC = 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V nominal, ±2.5% over –40°C to +125°C - ensures stable brownout detection across automotive and industrial temperature ranges |
| VCC Reset Timeout | 1200ms minimum - provides sufficient hold time for slow-ramping microcontrollers and FPGA configuration |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors and portable instruments |
| Output Type | Active-high push-pull - eliminates external pullup resistor, reduces BOM count and PCB area |
| Manual Reset Input | MR with 63kΩ internal pullup - supports momentary switch interface without external components |
| Operating Voltage Range | 1.0V to 5.5V - allows use with 1.2V, 1.8V, 2.5V, 3.3V, and 5V logic domains |
| Reset Output Validity | Guaranteed down to VCC = 1V - ensures deterministic reset behavior during deep brownout conditions |
Pinout & Package
MAX6385XS46D7-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm, suitable for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Positive supply input | Primary power rail monitor input; powers internal comparator and timer; accepts 1.0V–5.5V |
| 2 - RESET | Active-high push-pull reset output | Drives high during reset assertion; sinks/source current per spec; no external pullup required |
| 3 - MR | Active-low manual reset input | Pulled high internally via 63kΩ; assert reset by grounding; debounced via internal timing |
| 4 - GND | Ground reference | Return path for VCC, MR, and RESET; must be low-impedance connection to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.63V threshold | Eliminates external resistor divider; reduces component count and layout sensitivity in 5V systems |
| 1200ms VCC reset timeout | Meets JEDEC JESD78 requirements for microcontroller initialization in industrial control applications |
| MR input with internal pullup | Enables direct connection of SPST switch to GND-no external resistor or debounce circuit needed |
| 3μA supply current at 1.8V | Extends battery life in portable medical devices and wireless sensor nodes beyond 10 years |
| –40°C to +125°C operation | Validated for under-hood automotive modules and factory-floor PLCs without derating |
Applications
| Industrial PLC Controllers | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Power cycling due to unstable 24V DC field bus with transient noise. IC Role / Device Role / Timing Role: Monitors main 5V logic rail and asserts active-high RESET to halt CPU execution until stable. Use Value: Prevents corrupted firmware writes during brownout by enforcing ≥1200ms reset hold time after VCC recovery. |
Use Scenario: Intermittent CR2032 coin-cell voltage sag during RF transmission bursts. IC Role / Device Role / Timing Role: Detects 4.63V threshold breach on 3.3V LDO output and triggers MCU reset. Use Value: Ensures clean boot sequence even at 3.0V battery voltage, leveraging guaranteed reset validity down to VCC = 1V. |
| Automotive Body Control Modules | Medical Point-of-Care Devices |
Use Scenario: Cold-cranking voltage dip to 6V battery level affecting 5V domain. IC Role / Device Role / Timing Role: Supervises 5V microcontroller supply and provides manual reset via dashboard service button. Use Value: MR input with 63kΩ pullup enables direct switch interface; AEC-Q100 qualified variant available. |
Use Scenario: Low-power sleep mode with wake-on-event requiring deterministic restart. IC Role / Device Role / Timing Role: Generates precise active-high reset pulse upon wake-up signal or power resumption. Use Value: 3μA quiescent current minimizes standby drain; 4-pin SC70 footprint saves space in handheld enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS46D4-T | 1120ms VCC reset timeout (vs. 1200ms) | Suitable where slightly shorter reset hold time is acceptable for faster boot sequences | Select for cost-sensitive designs where 80ms reduction in timeout does not impact system stability |
| MAX6326XR46D7-T | Same 4.63V threshold and 1200ms timeout but active-low open-drain output; requires external pullup | Used where legacy board design mandates active-low signaling or I²C-bus shared reset lines | Choose only if existing schematic uses open-drain topology; not drop-in compatible due to output polarity and drive type |
Compared with MAX6385XS46D7-T, the MAX6385XS46D4-T offers identical functionality with reduced timeout, while MAX6326XR46D7-T trades push-pull convenience for open-drain flexibility-neither is pin-compatible, and both require schematic revision for output interface changes.
Availability
MAX6385XS46D7-T is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered data loggers, and automotive body control modules requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6385XS46D7-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 supervisory circuits optimized for reliable reset generation in space- and power-constrained embedded systems.
FAQ
What is the reset threshold voltage of the MAX6385XS46D7-T?
The MAX6385XS46D7-T has a factory-set reset threshold of 4.63V, with ±2.5% accuracy over the full operating temperature range of –40°C to +125°C. This value is fixed and non-adjustable, matching the "46" suffix in the part number per Maxim's Reset Threshold table. The MAX6385XS46D7-T uses this threshold to monitor VCC and assert reset when supply voltage drops below this level.
Does the MAX6385XS46D7-T support manual reset functionality?
Yes, the MAX6385XS46D7-T includes a debounced manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. Driving MR low forces an immediate reset, which remains active for the full 1200ms timeout after MR is released. The MAX6385XS46D7-T requires no external components for basic manual reset implementation-just a momentary switch between MR and GND.
What package type is used for the MAX6385XS46D7-T?
The MAX6385XS46D7-T is packaged in a 4-pin SC70 (SOT-323) outline, designated as package code X4+1 with outline number 21-0098. Its dimensions are 2.0mm × 2.1mm × 0.95mm, making it suitable for compact PCB layouts. This differs from the 6-pin μDFN variants in the same family and is not pin-compatible with 3-pin or 6-pin versions of the MAX6385 series.
What is the supply current consumption of the MAX6385XS46D7-T at 3.6V?
At VCC = 3.6V and TA = +25°C, the MAX6385XS46D7-T draws 6μA typical supply current (ICC), with a maximum of 11μA over temperature. This ultra-low quiescent current enables extended operation in energy-harvesting and battery-backed applications. The MAX6385XS46D7-T maintains this efficiency across its full 1.0V–5.5V operating range, dropping to just 3μA at 1.8V.
Is the MAX6385XS46D7-T compatible with the MAX809 reset IC?
The MAX6385XS46D7-T is pin-compatible with the MAX809 family per Maxim's documentation, sharing identical 4-pin SC70 pinout and active-high push-pull output behavior. However, the MAX6385XS46D7-T offers tighter threshold accuracy (±2.5% vs. ±3.5% for MAX809), lower supply current (3μA vs. ~10μA), and guaranteed operation down to VCC = 1V-making it a functional upgrade, though layout reuse requires verification of thermal and decoupling requirements.
MAX6385XS46D7-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:
- 4.63V
- 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
MAX6385XS46D7-T FAQ
1.How can I place an order for MAX6385XS46D7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS46D7-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 MAX6385XS46D7-T reliable?
The price and inventory of MAX6385XS46D7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS46D7-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS46D7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS46D7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS46D7-T?
MAX6385XS46D7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS46D7-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 MAX6385XS46D7-T?
For technical support, including MAX6385XS46D7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS46D7-T requirements.
6.How does Aetrix verify that MAX6385XS46D7-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS46D7-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 MAX6385XS46D7-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS46D7-T?
All MAX6385XS46D7-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS46D7-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 MAX6385XS46D7-T part is unused and in its original packaging.
Return procedure for MAX6385XS46D7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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