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Analog Devices Inc./Maxim Integrated MAX6385XS35D7-T
- Part No.:
- MAX6385XS35D7-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS35D7-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,641
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Product details
Overview
MAX6385XS35D7-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 3.50V reset threshold, 1200ms VCC reset timeout, and 150ms manual reset timeout. It monitors +1.8V to +5.0V supply rails, consumes only 3μA at +1.8V, and guarantees valid reset output down to VCC = 1V. It is used in portable battery-powered equipment for reliable power-on reset and brownout protection.
For engineers reviewing the MAX6385XS35D7-T datasheet, MAX6385XS35D7-T pinout, MAX6385XS35D7-T application, or MAX6385XS35D7-T equivalent, key selection criteria include its active-high push-pull reset output, precise ±2.5% threshold accuracy over –40°C to +125°C, 4-pin SC70 package, MR input with internal pullup, and immunity to negative-going VCC transients.
Technical Context
The MAX6385XS35D7-T implements a precision voltage comparator with ±2.5% reset threshold accuracy across –40°C to +125°C and 60ppm/°C tempco. Its internal timer enforces a guaranteed minimum 1200ms reset assertion after VCC rises above 3.50V, and a separate 150ms timeout after manual reset release.
It features an active-high push-pull RESET output that drives high during fault conditions (VCC < 3.50V or MR low), with VOL ≤ 0.3V at ISINK = 1.2mA and VOH ≥ 0.8×VCC at ISOURCE = 500µA. The MR input includes a 63kΩ internal pullup resistor and accepts TTL/CMOS logic levels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.50V nominal, ±2.5% over –40°C to +125°C - ensures accurate brownout detection across automotive and industrial temperature ranges |
| VCC Reset Timeout | 1200ms minimum - provides sufficient hold time for slow-ramping microcontrollers during power-up |
| Manual Reset Timeout | 150ms minimum - enables fast, user-initiated reset without interfering with system boot timing |
| Supply Current | 3μA at +1.8V - supports ultra-low-power operation in battery-backed systems |
| Output Type | Active-high push-pull - eliminates need for external pullup resistor and simplifies interface to μP reset inputs |
| Operating Voltage | +1.0V to +5.5V - guarantees functional reset assertion even during deep brownout down to 1V supply |
| MR Input Pullup | 63kΩ internal - allows direct connection of momentary switch to GND without external components |
Pinout & Package
MAX6385XS35D7-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 supply input and monitored voltage rail - must be decoupled with 0.1µF capacitor near pin for transient immunity |
| 2 | RESET | Active-high push-pull reset output - drives high during reset condition; sinks current when deasserted |
| 3 | MR | Active-low manual reset input - internally pulled up to VCC; logic low forces reset for ≥150ms after release |
| 4 | GND | Ground reference - requires low-impedance connection to system ground plane for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 3.50V threshold | Eliminates external resistor network and calibration effort for fixed-voltage monitoring |
| 1200ms VCC reset timeout | Meets JEDEC JESD78 requirements for microcontroller reset hold time under slow-ramp conditions |
| 150ms manual reset timeout | Enables rapid system recovery without disrupting firmware initialization sequence |
| 3μA supply current at 1.8V | Extends battery life in coin-cell–powered IoT sensors and wearables by >10 years in standby |
| MR input with 63kΩ pullup | Reduces BOM count by removing external pullup resistor and supports direct switch-to-ground interface |
Applications
| Portable Power Management | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Monitoring Li-ion battery voltage during discharge to prevent deep-undervoltage operation in handheld test meters. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high RESET to halt MCU execution when core supply drops below 3.50V. Use Value: Prevents data corruption and flash memory write errors during brownout, leveraging guaranteed 1200ms reset hold time. | Use Scenario: Ensuring deterministic startup of a low-power environmental sensor node powered by a CR2032 coin cell. IC Role / Device Role / Timing Role: Providing power-on reset and manual reset via tactile switch, with 150ms MR timeout enabling quick field recalibration. Use Value: Enables reliable wake-from-deep-sleep using MR without requiring additional debounce circuitry or GPIO resources. |
| Industrial Controller Boot Integrity | Automotive Body Control Module |
Use Scenario: Securing safe boot sequence of an ARM Cortex-M4-based PLC controller operating from a 3.3V rail. IC Role / Device Role / Timing Role: Detecting VCC undervoltage during cold-start and asserting RESET until stable 3.3V is confirmed for ≥1200ms. Use Value: Guarantees full peripheral initialization before code execution begins, mitigating race conditions in safety-critical firmware. | Use Scenario: Supervising 3.3V I/O supply in a CAN-connected body control unit exposed to automotive load-dump transients. IC Role / Device Role / Timing Role: Active-high push-pull RESET output directly interfaces with MCU reset pin while rejecting sub-100ns VCC glitches. Use Value: Maintains system reliability under harsh electrical environments without false resets, supported by negative-going transient immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3-T | 3.08V reset threshold, 240ms timeout, no MR input, 3-pin SOT23 | Lacks manual reset capability and offers shorter timeout - unsuitable for systems requiring user-initiated recovery | Select only if fixed 3.08V threshold and minimal footprint are prioritized over MR functionality |
| TPS3808G33DBVR | 3.3V threshold, 200ms timeout, adjustable delay via capacitor, 5-pin SOT23 | Requires external timing capacitor and has lower accuracy (±0.5% typ) - adds component count and reduces predictability | Choose when programmable timeout is needed and tighter threshold tolerance is acceptable trade-off |
Compared with MAX809TRD3-T and TPS3808G33DBVR, the MAX6385XS35D7-T uniquely delivers factory-set 3.50V accuracy, integrated MR with 150ms timeout, and guaranteed 1200ms hold time in a 4-pin SC70 - making it optimal for compact, battery-sensitive designs requiring both power and manual reset assurance.
Availability
MAX6385XS35D7-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, critical microprocessor systems, and industrial controllers requiring stable component supply and long-term lifecycle support.
Supply support for MAX6385XS35D7-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 management, sensing, and interface applications across industrial, automotive, and computing markets.
The MAX6381–MAX6390 family was engineered specifically for low-power, high-accuracy microprocessor supervision in space- and energy-constrained systems, with emphasis on guaranteed timing, wide temperature operation, and minimal external components.
FAQ
What is the exact reset threshold voltage of the MAX6385XS35D7-T?
The MAX6385XS35D7-T has a factory-set nominal reset threshold of 3.50V, with guaranteed tolerance of ±2.5% over the full operating temperature range of –40°C to +125°C. This value is confirmed in the Reset Thresholds table of the datasheet, where suffix "35" corresponds to VTH(nom) = 3.50V, VTH(min) = 3.41V, and VTH(max) = 3.59V.
Does the MAX6385XS35D7-T support manual reset functionality?
Yes, the MAX6385XS35D7-T includes a dedicated active-low manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. Driving MR low forces reset assertion, which remains active for a guaranteed minimum of 150ms after MR is released - a feature explicitly documented for MAX6385 in the Selector Guide and Pin Description sections.
What package type and dimensions does the MAX6385XS35D7-T use?
The MAX6385XS35D7-T is supplied in a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. This RoHS-compliant, lead-free package is confirmed in the Ordering Information table and Package Information section of the datasheet.
How does the MAX6385XS35D7-T behave during VCC brownout conditions?
When VCC falls below 3.50V, the MAX6385XS35D7-T asserts its active-high RESET output. After VCC recovers above the threshold, RESET remains asserted for a minimum of 1200ms - ensuring the microprocessor remains held in reset long enough for stable power rail establishment, as verified in the Reset Timeout Period specification table.
Is the MAX6385XS35D7-T compatible with 1.8V supply systems?
Yes, the MAX6385XS35D7-T operates from +1.0V to +5.5V and consumes only 3μA at +1.8V. Its RESET output is guaranteed functional down to VCC = 1V, and its 3.50V threshold remains accurate across the full –40°C to +125°C range - making it fully compatible with 1.8V logic domains when monitoring higher-voltage rails like 3.3V or 5V supplies.
MAX6385XS35D7-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:
- 3.5V
- 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
MAX6385XS35D7-T FAQ
1.How can I place an order for MAX6385XS35D7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS35D7-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 MAX6385XS35D7-T reliable?
The price and inventory of MAX6385XS35D7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS35D7-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS35D7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS35D7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS35D7-T?
MAX6385XS35D7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS35D7-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 MAX6385XS35D7-T?
For technical support, including MAX6385XS35D7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS35D7-T requirements.
6.How does Aetrix verify that MAX6385XS35D7-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS35D7-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 MAX6385XS35D7-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS35D7-T?
All MAX6385XS35D7-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS35D7-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 MAX6385XS35D7-T part is unused and in its original packaging.
Return procedure for MAX6385XS35D7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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