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Analog Devices Inc./Maxim Integrated MAX6388XS20D2-T
- Part No.:
- MAX6388XS20D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS20D2-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,109
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Product details
Overview
MAX6388XS20D2-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.0V reset threshold (±2.5% over -40°C to +125°C), 20ms minimum reset timeout, and auxiliary RESET IN input for dual-voltage monitoring. It operates from 1.0V to 5.5V supply and consumes only 3μA at 1.8V, targeting power-critical embedded systems requiring reliable brownout detection.
For engineers reviewing the MAX6388XS20D2-T datasheet, MAX6388XS20D2-T pinout, MAX6388XS20D2-T application, or MAX6388XS20D2-T equivalent, key selection criteria include its 2.0V VTH, 20ms tRP, 4-pin SC70 package, RESET IN compatibility with external resistor dividers, and guaranteed reset validity down to VCC = 1V.
Technical Context
The MAX6388XS20D2-T integrates a precision voltage comparator monitoring VCC against a 2.0V factory-trimmed threshold and a separate auxiliary comparator referenced to +1.27V at RESET IN. Its internal timer asserts RESET for ≥20ms after VCC or RESET IN recovers above their respective thresholds.
It features an active-high push-pull RESET output capable of sourcing 800µA at VCC ≥ 4.5V (VOH ≥ 0.8×VCC) and sinking 3.2mA (VOL ≤ 0.4V), with guaranteed logic-state validity down to VCC = 1V. The RESET IN input draws ≤50nA leakage and supports user-defined thresholds via external resistive dividers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.00V ±2.5% over -40°C to +125°C - ensures stable brownout detection across automotive/industrial temperature range |
| Reset Timeout Period | 20ms minimum - provides sufficient hold time for μP initialization before release |
| VCC Operating Range | 1.0V to 5.5V - supports single-supply operation in ultra-low-voltage and mixed-rail systems |
| Supply Current | 3μA at 1.8V - enables multi-year battery life in portable equipment |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup resistor and simplifies interface to μP reset input |
| Auxiliary Input | RESET IN with 1.27V reference - allows independent monitoring of second supply (e.g., I/O rail) using external resistor divider |
| Reset Assertion Validity | Guaranteed down to VCC = 1V - ensures deterministic reset behavior during deep brownout |
Pinout & Package
MAX6388XS20D2-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, optimized for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage source - powers internal circuitry and sets main reset threshold |
| 2 | RESET | Active-high push-pull output - drives high during reset assertion; no external pullup required |
| 3 | GND | Analog/digital ground reference - must be connected to system ground plane for accurate threshold sensing |
| 4 | RESET IN | Auxiliary voltage monitor input - compared to internal 1.27V reference; enables dual-supply supervision via external resistor divider |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply monitoring capability | Simultaneous VCC and RESET IN supervision with independent thresholds - supports core/I/O rail coordination in SoC systems |
| Negative-going VCC transient immunity | Rejects short-duration glitches (e.g., <1µs at 100mV overdrive) - prevents spurious resets in noisy power environments |
| Low-power operation | 3μA supply current at 1.8V - reduces quiescent load on battery or energy-harvesting sources |
| Factory-trimmed accuracy | ±2.5% reset threshold tolerance over full temperature range - eliminates need for external calibration |
| Guaranteed reset state at low VCC | Valid logic levels maintained down to VCC = 1V - ensures fail-safe behavior during deep undervoltage conditions |
Applications
| Industrial PLC Power Monitoring | Automotive Body Control Module |
|---|---|
|
Use Scenario: Supervises 3.3V main supply and 5V I/O rail in programmable logic controller backplane under wide-temperature operation. IC Role / Device Role / Timing Role: Dual-threshold supervisor asserting active-high RESET to ARM Cortex-M7 during brownout or dual-rail fault. Use Value: Prevents corrupted firmware execution by holding processor in reset until both supplies stabilize within 2.0V and 4.63V thresholds. |
Use Scenario: Monitors 12V-to-5V DC/DC converter output and 3.3V MCU core supply in vehicle door module exposed to -40°C to +125°C ambient. IC Role / Device Role / Timing Role: Resets Infineon AURIX TC3xx via active-high push-pull output upon VCC drop below 2.0V or RESET IN fall below 1.27V. Use Value: Enables AEC-Q100-compliant system-level safety by guaranteeing reset assertion even at VCC = 1V during cold-crank events. |
| Portable Medical Sensor Hub | Dual-Voltage IoT Edge Node |
|
Use Scenario: Powers wearable ECG sensor with coin-cell battery; monitors 1.8V analog front-end and 3.0V BLE radio supply. IC Role / Device Role / Timing Role: Asserts RESET for 20ms when either supply dips - synchronizing ADC sampling and wireless transmission startup. Use Value: Extends battery life via 3μA quiescent current while ensuring deterministic wake-up timing after power recovery. |
Use Scenario: Supervises 2.5V FPGA configuration rail and 1.2V core rail in industrial gateway with isolated power architecture. IC Role / Device Role / Timing Role: Uses RESET IN pin to set custom 2.5V threshold for FPGA rail while VCC monitors 1.2V core via internal 2.0V threshold. Use Value: Eliminates need for two discrete supervisors by enabling precise, independent reset timing per rail with single IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT20D2-T | Same electrical specs but in 6-pin µDFN (1.5mm × 1.5mm) instead of 4-pin SC70 - higher thermal resistance (θJA = 477°C/W vs. 322.6°C/W) | Preferred for thermally demanding layouts where µDFN solder joint reliability outweighs size constraints | Select when board assembly uses µDFN reflow profile and thermal management prioritizes package robustness over footprint area |
| MAX6385XS20D2-T | Identical 4-pin SC70 package and 2.0V/20ms specs, but includes manual reset input (MR) - adds 100kΩ internal pullup and MR-to-RESET delay of 200ns | Required where field-serviceable hardware reset button or test-mode forced reset is mandated | Choose when system design requires operator-initiated reset capability without adding external switch debouncing circuitry |
Compared with MAX6388XS20D2-T, the LT20D2-T variant trades smaller footprint for higher thermal resistance, while the XS20D2-T (MAX6385) adds MR functionality at identical reset timing - making MAX6388XS20D2-T optimal for space-limited dual-rail supervision without manual reset needs.
Availability
MAX6388XS20D2-T is available at Aetrix Electronics and suitable for industrial PLC power monitoring, automotive body control modules, portable medical sensor hubs, and dual-voltage IoT edge nodes requiring stable component supply and long-term lifecycle support.
Supply support for MAX6388XS20D2-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 industrial, automotive, and communications applications, emphasizing low power, high reliability, and AEC-Q100 qualification.
The MAX6381–MAX6390 family delivers single/dual low-voltage microprocessor reset circuits optimized for battery-powered and thermally constrained systems requiring guaranteed reset behavior across extreme temperatures.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6388XS20D2-T?
The MAX6388XS20D2-T has a factory-set reset threshold of 2.00V with ±2.5% tolerance over the full operating temperature range (-40°C to +125°C). This value is specified in the Reset Thresholds table of the datasheet and confirmed by electrical characterization at TA = +25°C and across temperature extremes. The MAX6388XS20D2-T maintains this accuracy without external calibration components.
Does MAX6388XS20D2-T support monitoring of a second voltage rail?
Yes, the MAX6388XS20D2-T includes a dedicated RESET IN pin that compares an external voltage to an internal +1.27V reference. By connecting a resistor divider to RESET IN, users can configure a custom reset threshold for a second supply rail. This feature is explicitly documented in the Pin Description and Applications Information sections for MAX6387/MAX6388/MAX6389 variants.
What is the minimum reset timeout period for MAX6388XS20D2-T?
The MAX6388XS20D2-T provides a minimum reset timeout period of 20ms, as indicated by the "D2" suffix in its part number. This value is guaranteed across the full temperature range and supply voltage (1.0V to 5.5V) per the Electrical Characteristics table. The timeout begins when VCC or RESET IN rises above their respective thresholds and ensures sufficient hold time for microprocessor initialization.
Is MAX6388XS20D2-T compatible with standard SC70 footprints?
Yes, the MAX6388XS20D2-T uses a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187) with 0.65mm pin pitch. Its mechanical dimensions (2.0mm × 2.1mm × 0.95mm) and pad layout match industry-standard SC70-4 footprints, enabling direct placement on boards designed for compatible devices like MAX6384XSxxDx-T or MAX6385XSxxDx-T without layout modification.
What is the supply current consumption of MAX6388XS20D2-T at 1.8V?
The MAX6388XS20D2-T consumes 3μA typical supply current at VCC = 1.8V, as specified in the Electrical Characteristics table under "VCC Supply Current". This ultra-low quiescent current is measured with no load and supports multi-year operation in battery-powered applications such as portable medical sensors and wireless IoT endpoints.
MAX6388XS20D2-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:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS20D2-T FAQ
1.How can I place an order for MAX6388XS20D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS20D2-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 MAX6388XS20D2-T reliable?
The price and inventory of MAX6388XS20D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS20D2-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS20D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS20D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS20D2-T?
MAX6388XS20D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS20D2-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 MAX6388XS20D2-T?
For technical support, including MAX6388XS20D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS20D2-T requirements.
6.How does Aetrix verify that MAX6388XS20D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS20D2-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 MAX6388XS20D2-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS20D2-T?
All MAX6388XS20D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS20D2-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 MAX6388XS20D2-T part is unused and in its original packaging.
Return procedure for MAX6388XS20D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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