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Analog Devices Inc./Maxim Integrated MAX6388XS31D3+
- Part No.:
- MAX6388XS31D3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS31D3+.pdf
- Description:
- MAX6388 SC70, SINGLE LOW-VOLTAGE
- Quantity:
- Payment:
- Shipping:
Inventory:1,004
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Product details
Overview
MAX6388XS31D3+ from Maxim Integrated is a single-supply, low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 3.08V reset threshold (±2.5% over -40°C to +125°C), and 140ms minimum reset timeout. It monitors VCC in systems requiring reliable power-on reset for embedded controllers and portable electronics operating from 1.8V to 5.0V supplies.
For engineers reviewing the MAX6388XS31D3+ datasheet, MAX6388XS31D3+ pinout, MAX6388XS31D3+ application, or MAX6388XS31D3+ equivalent, key selection considerations include its auxiliary RESET IN input for dual-voltage monitoring, guaranteed reset validity down to VCC = 1V, ±2.5% threshold accuracy over temperature, and SC70-4 package compatibility with space-constrained designs.
Technical Context
The MAX6388XS31D3+ integrates a precision voltage comparator referenced to an internal bandgap, a 140ms monolithic reset timeout timer, and an auxiliary RESET IN comparator tied to a fixed +1.27V reference. It supports user-defined secondary voltage monitoring via external resistor divider on RESET IN.
This device uses BiCMOS process technology (647 transistors) and features negative-going VCC transient immunity up to 35µs at 100mV overdrive. Its push-pull active-high RESET output drives high during fault conditions and guarantees correct logic state for VCC ≥ 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V nominal (suffix "31"), ±2.5% over -40°C to +125°C - ensures accurate brownout detection across industrial temperature range |
| Reset Timeout | 140ms minimum (suffix "D3") - provides sufficient hold time for µP initialization before release |
| Supply Current | 3µA at +1.8V, 6µA at +3.6V - enables multi-year battery life in portable equipment |
| Operating Voltage | 1.0V to 5.5V - supports valid reset assertion even during deep brownout down to 1V |
| RESET Output Type | Active-high push-pull - eliminates need for external pull-up resistor; drives high during reset assertion |
| Auxiliary Input | RESET IN with +1.27V internal reference - allows monitoring of second supply rail via external resistor divider |
| Package | 4-pin SC70 (X4-1 code) - 1.3mm × 1.1mm footprint ideal for ultra-compact PCB layouts |
Pinout & Package
MAX6388XS31D3+ is housed in a lead-free 4-pin SC70 package (package code X4-1), measuring 1.3mm × 1.1mm × 0.6mm, with gull-wing leads and exposed pad not present. Pin 1 is marked by a dot or beveled edge.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input; powers internal circuitry and serves as primary voltage monitor |
| 2 | RESET | Active-high push-pull reset output; driven high during reset assertion, low otherwise |
| 3 | RESET IN | Auxiliary voltage monitor input; compared to +1.27V internal reference for secondary supply supervision |
| 4 | GND | Ground reference for all internal circuitry and comparator inputs |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneous monitoring of VCC and secondary rail via RESET IN with user-adjustable threshold using resistor divider |
| Low-power operation | 3µA supply current at 1.8V enables use in energy-sensitive applications such as wearables and IoT sensors |
| Guaranteed reset validity | RESET output remains logically valid down to VCC = 1V - critical for detecting deep brownout events |
| Negative transient immunity | Rejects VCC glitches ≤35µs duration at 100mV overdrive - prevents spurious resets in noisy environments |
| Factory-trimmed accuracy | ±2.5% reset threshold tolerance over full temperature range eliminates need for external calibration |
Applications
| Industrial PLC I/O Modules | Medical Wearable Sensors |
|---|---|
Use Scenario: Monitoring 3.3V logic supply and 1.8V sensor rail in compact field I/O modules subject to line transients. IC Role / Device Role / Timing Role: Primary VCC supervisor with auxiliary RESET IN configured for 1.8V rail; asserts active-high RESET for 140ms on any undervoltage event. Use Value: Prevents firmware corruption during power cycling and ensures deterministic startup after brownout recovery. | Use Scenario: Power management in battery-powered ECG patch with dual-core MCU requiring coordinated reset timing. IC Role / Device Role / Timing Role: Supervises main 3.08V system rail while RESET IN monitors regulated 1.2V analog front-end supply; delivers synchronized reset pulse. Use Value: Eliminates need for two discrete supervisors, reducing BOM count and PCB area by 50% versus discrete solution. |
| Automotive Body Control Units | Smart Home Hub Power Sequencing |
Use Scenario: Reset coordination in 12V-to-3.3V/1.8V distributed power architecture with load-dump immunity requirements. IC Role / Device Role / Timing Role: Monitors 3.3V domain with 3.08V threshold and uses RESET IN to supervise isolated 1.8V CAN transceiver supply. Use Value: Enables fail-safe shutdown of communication peripherals before main controller reset, preventing bus contention. | Use Scenario: Ensuring clean boot sequence across Wi-Fi SoC, memory, and audio codec in always-on smart speaker. IC Role / Device Role / Timing Role: Provides 140ms reset hold time while RESET IN validates stable 1.1V core voltage before releasing main processor reset. Use Value: Guarantees power-rail sequencing compliance without requiring FPGA-based power management IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT31D3+ | Same electrical specs but in 6-pin µDFN-6 (L611-1) package - larger footprint, better thermal performance | Suitable for higher-reliability industrial designs where board space permits and thermal dissipation matters | Select when PCB layout allows 1.5mm × 1.0mm package and enhanced thermal margin is required |
| TPS3808G33DBVR | TI part with 3.3V threshold, 200ms timeout, 1.6µA typical ICC at 3.3V - lower quiescent current but no RESET IN input | Lacks auxiliary voltage monitoring capability; requires separate supervisor for dual-rail systems | Choose only for single-rail applications where lowest possible current draw is prioritized over dual-monitoring functionality |
Compared with MAX6388XS31D3+, the MAX6388LT31D3+ offers identical supervision functionality in a thermally superior µDFN package, while TPS3808G33DBVR trades away RESET IN capability for lower ICC - making MAX6388XS31D3+ optimal for space-constrained dual-supply systems needing minimal bill-of-materials.
Availability
MAX6388XS31D3+ is available at Aetrix Electronics and suitable for industrial control, medical wearables, automotive body electronics, and smart home hubs requiring stable component supply and long-term lifecycle support.
Supply support for MAX6388XS31D3+ 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 was engineered specifically for low-voltage, low-power microprocessor reset supervision in battery-operated and space-constrained systems - emphasizing accuracy, reliability, and minimal footprint.
FAQ
What is the exact reset threshold voltage of MAX6388XS31D3+?
The MAX6388XS31D3+ has a factory-set nominal reset threshold of 3.08V, with guaranteed tolerance of ±2.5% over the full operating temperature range (-40°C to +125°C). This value corresponds to the "31" suffix in the part number and is trimmed during production for high accuracy without external components.
Does MAX6388XS31D3+ support monitoring of a second voltage rail?
Yes, MAX6388XS31D3+ includes a dedicated RESET IN pin tied to an internal +1.27V reference. By connecting an external resistor divider to this pin, users can configure a custom reset threshold for a secondary voltage rail - enabling dual-supply supervision in a single IC.
What is the function of the RESET output on MAX6388XS31D3+?
The RESET output of MAX6388XS31D3+ is an active-high push-pull driver. It asserts high whenever VCC falls below 3.08V or the voltage at RESET IN drops below its derived threshold, and remains high for the full 140ms timeout period after recovery - ensuring reliable µP initialization without external pull-up components.
Can MAX6388XS31D3+ operate reliably at very low supply voltages?
Yes, MAX6388XS31D3+ guarantees correct RESET output logic state down to VCC = 1.0V. This feature ensures deterministic behavior during deep brownout conditions, allowing safe system shutdown before supply collapse - a critical capability for data integrity in embedded applications.
What package type is used for MAX6388XS31D3+ and what are its dimensions?
MAX6388XS31D3+ is packaged in a lead-free 4-pin SC70 (X4-1) case measuring 1.3mm × 1.1mm × 0.6mm. Its gull-wing lead configuration supports standard reflow soldering processes and provides a compact solution for high-density PCB layouts where board space is severely constrained.
MAX6388XS31D3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 3.08V, Adj
- 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
MAX6388XS31D3+ FAQ
1.How can I place an order for MAX6388XS31D3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS31D3+ 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 MAX6388XS31D3+ reliable?
The price and inventory of MAX6388XS31D3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS31D3+ is usually 5 days.
3.What payment methods are accepted for MAX6388XS31D3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS31D3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS31D3+?
MAX6388XS31D3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS31D3+ 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 MAX6388XS31D3+?
For technical support, including MAX6388XS31D3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS31D3+ requirements.
6.How does Aetrix verify that MAX6388XS31D3+ is sourced from the original manufacturer or authorized distributors?
All MAX6388XS31D3+ 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 MAX6388XS31D3+ meets industry standards.
7.What is the process for return or replacement of MAX6388XS31D3+?
All MAX6388XS31D3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS31D3+, 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 MAX6388XS31D3+ part is unused and in its original packaging.
Return procedure for MAX6388XS31D3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6388XS31D3+ Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
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APX803L20-29SA-7
Diodes Incorporated
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TPS3828-33DBVR
Texas Instruments
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V6340RSP3B+
EM Microelectronic
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EM6325CXSP5B-2.9+
EM Microelectronic
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MCP120T-300I/TT
Microchip Technology
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MCP130T-315I/TT
Microchip Technology
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MCP120T-475I/TT
Microchip Technology
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MCP111T-300E/TT
Microchip Technology
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MCP120T-315I/TT
Microchip Technology
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MCP809T-315I/TT
Microchip Technology
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