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Analog Devices Inc./Maxim Integrated MAX6385XS23D1-T
- Part No.:
- MAX6385XS23D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS23D1-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,978
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Product details
Overview
MAX6385XS23D1-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 2.31V reset threshold, 1ms minimum reset timeout, and manual reset input (MR), designed for reliable power-on reset assertion in low-voltage embedded systems operating from +1.8V to +5.0V supply. It consumes only 3μA at +1.8V and guarantees valid reset output down to VCC = 1V.
For engineers reviewing the MAX6385XS23D1-T datasheet, MAX6385XS23D1-T pinout, MAX6385XS23D1-T application, or MAX6385XS23D1-T equivalent, key selection criteria include its active-high push-pull reset output, MR debounce capability, ±2.5% threshold accuracy over –40°C to +125°C, 4-pin SC70 package, and compatibility with dual-rail voltage monitoring systems requiring deterministic reset timing.
Technical Context
The MAX6385XS23D1-T implements a precision bandgap-based reset comparator with 2.31V nominal threshold and 60ppm/°C tempco, paired with a monolithic timer generating a guaranteed-minimum 1ms reset assertion period after VCC recovery. Its internal 63kΩ MR pullup resistor enables direct connection of a momentary switch to GND without external components.
This device belongs to the MAX6384–MAX6390 subgroup featuring 4-pin SC70 packaging, active-high push-pull RESET output, and integrated manual reset functionality - distinct from open-drain or active-low variants and excluding auxiliary RESET IN capability found in MAX6387–MAX6389.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.31V nominal (±2.5% over –40°C to +125°C); ensures reliable detection of brownout on 2.5V or 3.3V rails |
| Reset Timeout | 1ms minimum; provides sufficient hold time for microcontroller core initialization before release |
| Supply Current | 3μA at +1.8V; enables use in battery-powered systems with multi-year standby life |
| Operating Voltage | +1.0V to +5.5V; supports operation down to 1V for valid reset state during deep brownout |
| Output Type | Active-high push-pull; eliminates need for external pullup and drives CMOS/TTL inputs directly |
| Manual Reset | MR input with 63kΩ internal pullup; allows hardware-initiated reset via momentary switch without external biasing |
| Package | 4-pin SC70 (X4+1 outline); 1.6mm × 1.6mm footprint ideal for space-constrained PCBs |
Pinout & Package
MAX6385XS23D1-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187) with 0.65mm pitch and thermal resistance θJA = 322.6°C/W on multilayer board.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary power supply input and monitored rail; powers internal circuitry and serves as reference for reset threshold detection |
| 2 | RESET | Active-high push-pull output; asserts high during reset condition and deasserts low after timeout completes |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC; pulling low forces immediate reset assertion |
| 4 | GND | Analog and digital ground reference; must be connected to system ground plane for stable comparator operation |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.31V with ±2.5% tolerance across –40°C to +125°C - eliminates need for external resistor dividers or calibration |
| Guaranteed reset validity | RESET output remains logic-valid down to VCC = 1V - ensures deterministic behavior during deep undervoltage events |
| Integrated MR pullup | 63kΩ internal resistor enables single-switch manual reset implementation - reduces BOM count and layout complexity |
| Negative-going transient immunity | Immune to sub-µs VCC glitches below threshold - prevents spurious resets in electrically noisy environments |
| Low-power operation | 3μA supply current at +1.8V - extends battery life in portable instrumentation and IoT edge nodes |
Applications
| Industrial PLC I/O Modules | Medical Wearable Sensors |
|---|---|
Use Scenario: Power sequencing and fault recovery in DIN-rail mounted programmable logic controllers with isolated 24V/5V/3.3V rails. IC Role / Device Role / Timing Role: Supervises 3.3V microcontroller supply and asserts active-high RESET to halt firmware execution during undervoltage or cold-start conditions. Use Value: 1ms timeout ensures full register initialization before release; MR input allows field-service reset without power cycling. | Use Scenario: Battery-powered ECG patch with ultra-low quiescent current requirements and clinical-grade reliability. IC Role / Device Role / Timing Role: Monitors 1.8V analog front-end and 3.3V BLE radio supply, asserting RESET on either rail collapse to prevent corrupted sensor data transmission. Use Value: 3μA ICC at 1.8V extends coin-cell lifetime beyond 3 years; ±2.5% threshold accuracy maintains safety margin across body temperature range. |
| Automotive Body Control Units | Smart Energy Metering Terminals |
Use Scenario: AEC-Q100 qualified subsystem in door module controlling window lift, mirror fold, and interior lighting. IC Role / Device Role / Timing Role: Provides fail-safe reset to 32-bit MCU during load-dump transients or battery disconnect events on 5V domain. Use Value: Push-pull active-high output interfaces directly with MCU's nRST pin; negative-going glitch immunity prevents false triggers during alternator switching noise. | Use Scenario: Revenue-grade electricity meter with dual-supply architecture (3.3V metrology ASIC + 1.8V RTC backup). IC Role / Device Role / Timing Role: Supervises main 3.3V rail and asserts RESET to halt metering firmware when voltage drops below 2.31V due to grid sag. Use Value: Factory-set 2.31V threshold matches typical LDO dropout margin; 4-pin SC70 minimizes PCB area in sealed meter housing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS23D2-T | 20ms minimum reset timeout vs. 1ms; otherwise identical threshold, output type, and package | Suitable where longer reset hold time is required for complex boot sequences or peripheral initialization | Select MAX6385XS23D2-T if system requires ≥20ms reset assertion; otherwise MAX6385XS23D1-T provides minimal necessary timing margin |
| TPS3808G125DBVR | 2.5V fixed threshold, 200ms timeout, SOT-23-5 package; no MR input; higher 8μA ICC at 3.3V | Lacks manual reset capability and uses larger 5-pin package; better suited for cost-sensitive non-field-serviceable designs | Choose TPS3808G125DBVR only if 2.5V threshold aligns with system rail and MR is unnecessary; MAX6385XS23D1-T offers superior flexibility and lower power |
Compared with MAX6385XS23D2-T and TPS3808G125DBVR, the MAX6385XS23D1-T delivers the shortest standardized reset timeout (1ms) while retaining MR functionality and lowest quiescent current - making it optimal for fast-boot, field-serviceable, and battery-critical applications where precise 2.31V threshold alignment is required.
Availability
MAX6385XS23D1-T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, medical wearable sensors, automotive body control units, and smart energy metering terminals requiring stable component supply with AEC-Q100 qualification support and long-term lifecycle assurance.
Supply support for MAX6385XS23D1-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 demanding industrial, automotive, and healthcare applications.
The MAX6381–MAX6390 family was engineered specifically for low-voltage microprocessor supervision in space- and power-constrained systems, emphasizing factory-trimmed accuracy, ultra-low ICC, and robust transient immunity across extended temperature ranges.
FAQ
What is the exact reset threshold voltage of the MAX6385XS23D1-T?
The MAX6385XS23D1-T has a factory-set nominal reset threshold of 2.31V, 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 (suffix "23" corresponds to 2.26V min / 2.31V nom / 2.37V max). The MAX6385XS23D1-T uses this precise threshold to monitor 2.5V or 3.3V supply rails for brownout conditions.
Does the MAX6385XS23D1-T support manual reset functionality?
Yes, the MAX6385XS23D1-T includes a dedicated MR (manual reset) input pin with an internal 63kΩ pullup resistor to VCC. Driving MR low forces immediate reset assertion, and the device holds RESET high for the full 1ms timeout period after MR is released. This feature is explicitly documented in the Pin Description and Features sections, confirming that MAX6385XS23D1-T belongs to the MR-enabled subgroup (MAX6384/MAX6385/MAX6386/MAX6390).
What package type and footprint does the MAX6385XS23D1-T use?
The MAX6385XS23D1-T is supplied in a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), designated by the "XS" prefix in the part number. This RoHS-compliant package measures 1.6mm × 1.6mm with 0.65mm pin pitch and features thermal resistance θJA = 322.6°C/W on a multilayer PCB - verified in the Package Information section of the datasheet.
Is the MAX6385XS23D1-T compatible with AEC-Q100 automotive requirements?
No, the MAX6385XS23D1-T is not AEC-Q100 qualified. While the MAX6381–MAX6390 family includes /V suffix variants (e.g., MAX6385XS23D1/V+T) that meet AEC-Q100 Grade 2 (–40°C to +105°C), the standard MAX6385XS23D1-T carries only the "+T" RoHS suffix and is specified for –40°C to +125°C operation without automotive qualification testing. Its datasheet notes AEC-Q100 qualification applies only to specific /V trim versions.
What is the minimum supply voltage at which the MAX6385XS23D1-T guarantees correct RESET output logic state?
The MAX6385XS23D1-T guarantees valid RESET output logic state down to VCC = 1.0V, as stated in the Electrical Characteristics table under "RESET Output State Guaranteed Valid Down to VCC = 1V". This ensures deterministic high/low assertion even during severe brownout conditions, unlike many supervisors that fail below 1.5V. The MAX6385XS23D1-T maintains this guarantee across its full –40°C to +125°C temperature range.
MAX6385XS23D1-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:
- 2.31V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS23D1-T FAQ
1.How can I place an order for MAX6385XS23D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS23D1-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 MAX6385XS23D1-T reliable?
The price and inventory of MAX6385XS23D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS23D1-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS23D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS23D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS23D1-T?
MAX6385XS23D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS23D1-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 MAX6385XS23D1-T?
For technical support, including MAX6385XS23D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS23D1-T requirements.
6.How does Aetrix verify that MAX6385XS23D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS23D1-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 MAX6385XS23D1-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS23D1-T?
All MAX6385XS23D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS23D1-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 MAX6385XS23D1-T part is unused and in its original packaging.
Return procedure for MAX6385XS23D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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