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Analog Devices Inc./Maxim Integrated MAX6388XS22D6-T
- Part No.:
- MAX6388XS22D6-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS22D6-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,259
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Product details
Overview
MAX6388XS22D6-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.19V VCC reset threshold (±2.5% over -40°C to +125°C), 560ms minimum VCC reset timeout, and auxiliary RESET IN input for dual-voltage monitoring. It consumes only 3μA at +1.8V and guarantees valid reset state down to VCC = 1V, used in battery-powered instrumentation and dual-rail embedded controllers.
For engineers reviewing the MAX6388XS22D6-T datasheet, MAX6388XS22D6-T pinout, MAX6388XS22D6-T application, or MAX6388XS22D6-T equivalent, key selection criteria include its 2.19V threshold accuracy, 560ms reset delay, 4-pin SC70 package, auxiliary voltage monitoring capability, and compatibility with systems requiring guaranteed reset assertion during brownout and transient immunity.
Technical Context
The MAX6388XS22D6-T integrates a precision bandgap reference and comparator to monitor VCC against a fixed 2.19V threshold while simultaneously accepting an external voltage via RESET IN for secondary supply supervision. Its internal timer ensures reset remains asserted for ≥560ms after VCC recovers above threshold.
It features an active-high push-pull RESET output that drives high during fault conditions and deasserts low after timeout; RESET IN compares against a stable +1.27V internal reference, enabling user-defined thresholds via resistor divider. The device operates across -40°C to +125°C with ±2.5% threshold accuracy and supports VCC as low as 1.0V while maintaining output validity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.19V nominal, ±2.5% over -40°C to +125°C - ensures reliable brownout detection across automotive/industrial temperature range |
| Reset Timeout Period | 560ms minimum - provides sufficient hold time for μP initialization in power-up sequencing |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered portable equipment |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup and simplifies interface to μP reset input |
| RESET IN Input Threshold | +1.27V internal reference - allows precise secondary voltage monitoring using external resistor divider |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout down to 1V VCC |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive and industrial control applications |
Pinout & Package
MAX6388XS22D6-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 PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor rail - powers internal circuitry and triggers reset when below 2.19V |
| 2 | RESET | Active-high push-pull output - drives high during reset condition; sinks current when deasserted low |
| 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 +1.27V internal reference; enables dual-supply supervision |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneous monitoring of VCC and external rail via RESET IN - supports systems with core/I/O dual supplies |
| Factory-trimmed threshold accuracy | ±2.5% over full temperature range - eliminates need for external calibration in production |
| Negative-going VCC transient immunity | Immune to short-duration glitches per Typical Operating Characteristics graph - reduces false resets in noisy environments |
| Low-VCC reset validity | Guaranteed correct logic state down to VCC = 1V - ensures deterministic behavior during deep brownout |
| Ultra-low quiescent current | 3μA at 1.8V - extends battery life in always-on sensor nodes and portable medical devices |
Applications
| Industrial Controller Power Monitoring | Battery-Powered Data Logger |
|---|---|
|
Use Scenario: Supervises 3.3V I/O and 1.8V core rails in programmable logic controller modules operating in harsh factory environments. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting active-high reset on either rail failure; 560ms timeout ensures safe firmware reload after brownout. Use Value: Prevents corrupted state transitions during unstable power by holding μP in reset until both supplies stabilize. |
Use Scenario: Monitors main Li-ion battery (3.6V) and backup coin cell (3.0V) in environmental sensor node logging temperature/humidity hourly. IC Role / Device Role / Timing Role: Primary VCC supervisor with auxiliary RESET IN tied to coin-cell rail - triggers reset if either supply drops below threshold. Use Value: Enables graceful shutdown and nonvolatile memory save before power loss, extending field deployment life. |
| Automotive Body Control Module | Medical Point-of-Care Instrument |
|
Use Scenario: Embedded in rear-view mirror ECU with 5V main supply and 3.3V CAN transceiver rail, exposed to wide thermal cycling. IC Role / Device Role / Timing Role: AEC-Q100–qualified supervisor providing reset assertion during cold-crank (low-battery) events and load-dump recovery. Use Value: Maintains functional safety integrity by guaranteeing reset pulse duration ≥560ms despite VCC sag to 2.2V. |
Use Scenario: Used in handheld glucose meter with dual 3.0V alkaline cells and 1.8V ADC reference supply, requiring FDA-grade reliability. IC Role / Device Role / Timing Role: Resets microcontroller if main battery falls below 2.19V or reference rail collapses - prevents erroneous measurement reporting. Use Value: Ensures clinical data integrity by forcing controlled reboot before analog front-end becomes uncalibrated. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT22D6-T | Same electrical specs but in 6-pin μDFN package - larger footprint, better thermal dissipation, no RESET IN pin connection flexibility | Preferred for high-reliability board-level assembly where μDFN reflow yield is controlled; not drop-in compatible due to different pin count and layout | Select when thermal performance > space constraints, and RESET IN routing requires dedicated pad access |
| TPS3808G33DBVR | 3.3V fixed threshold, 200ms timeout, open-drain output - lacks auxiliary RESET IN and active-high push-pull drive | Suitable for single-rail 3.3V systems without secondary monitoring; requires external pullup and level-shifting for active-high logic | Choose only if design uses only one supply and can accommodate open-drain interface and shorter timeout |
Compared with MAX6388XS22D6-T, the LT22D6-T variant trades SC70 compactness for μDFN thermal robustness and simplified layout, while the TPS3808G33DBVR offers lower cost in single-rail applications but sacrifices dual-monitoring capability, active-high drive, and long timeout - making it unsuitable for brownout resilience in dual-voltage systems.
Availability
MAX6388XS22D6-T is available at Aetrix Electronics and suitable for industrial controllers, battery-powered instrumentation, automotive body electronics, and medical point-of-care devices requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6388XS22D6-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 medical applications, emphasizing low power, high accuracy, and rugged operation.
The MAX6381–MAX6390 family delivers ultra-low-power, AEC-Q100–qualified supervisory circuits optimized for dual-voltage microprocessor systems requiring guaranteed reset timing and brownout immunity in space- and energy-constrained environments.
FAQ
What is the exact reset threshold voltage of MAX6388XS22D6-T and how stable is it over temperature?
The MAX6388XS22D6-T has a factory-set nominal VCC reset threshold of 2.19V, with guaranteed accuracy of ±2.5% across the full operating temperature range of -40°C to +125°C. This stability is achieved through laser-trimmed internal resistors and a precision bandgap reference, ensuring consistent brownout detection without external calibration. The MAX6388XS22D6-T maintains this tolerance under all specified supply and load conditions.
Does MAX6388XS22D6-T support monitoring of a second voltage rail, and how is it implemented?
Yes, the MAX6388XS22D6-T includes a dedicated RESET IN pin that connects to an internal +1.27V comparator reference. To monitor a second voltage, users connect RESET IN to the center tap of an external resistor divider - the threshold is calculated as VTH = 1.27V × (R1/R2 + 1). The MAX6388XS22D6-T asserts reset if either VCC falls below 2.19V or the divided voltage at RESET IN drops below 1.27V.
What is the function and timing behavior of the RESET output on MAX6388XS22D6-T?
The MAX6388XS22D6-T features an active-high push-pull RESET output that drives high when VCC falls below 2.19V or RESET IN falls below 1.27V, and remains high for a minimum of 560ms after both monitored voltages recover. It deasserts low thereafter without requiring external components. This behavior ensures the connected microprocessor remains held in reset long enough for stable power-up sequencing - a critical requirement confirmed in the MAX6388XS22D6-T datasheet timing specifications.
Can MAX6388XS22D6-T operate reliably at very low supply voltages, and what is the minimum functional VCC?
Yes, the MAX6388XS22D6-T guarantees correct RESET output logic state down to VCC = 1.0V, as explicitly stated in its Absolute Maximum Ratings and Electrical Characteristics tables. Below 1.0V, operation is not specified. This capability allows the MAX6388XS22D6-T to provide deterministic reset signaling during deep brownout events common in battery-depleted systems - a key differentiator versus many competing supervisors.
Is MAX6388XS22D6-T qualified for automotive applications, and what evidence supports this?
The MAX6388XS22D6-T carries the "/V" suffix option (e.g., MAX6388XS22D6/V+T) indicating AEC-Q100 qualification, and its datasheet explicitly states "AEC-Q100 Qualified" in the Features section. While the base part number MAX6388XS22D6-T is RoHS-compliant and rated for -40°C to +125°C operation, automotive-grade units require the /V suffix and are subject to additional stress testing - confirming suitability for under-hood and body-control module applications.
MAX6388XS22D6-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:
- 2.19V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 560ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS22D6-T FAQ
1.How can I place an order for MAX6388XS22D6-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS22D6-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 MAX6388XS22D6-T reliable?
The price and inventory of MAX6388XS22D6-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS22D6-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS22D6-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS22D6-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS22D6-T?
MAX6388XS22D6-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS22D6-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 MAX6388XS22D6-T?
For technical support, including MAX6388XS22D6-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS22D6-T requirements.
6.How does Aetrix verify that MAX6388XS22D6-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS22D6-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 MAX6388XS22D6-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS22D6-T?
All MAX6388XS22D6-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS22D6-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 MAX6388XS22D6-T part is unused and in its original packaging.
Return procedure for MAX6388XS22D6-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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