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Analog Devices Inc./Maxim Integrated MAX6388XS18D2-T
- Part No.:
- MAX6388XS18D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS18D2-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,158
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Product details
Overview
MAX6388XS18D2-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 1.8V 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, enabling reliable power-up/brownout detection in space-constrained battery-powered systems.
For engineers reviewing the MAX6388XS18D2-T datasheet, MAX6388XS18D2-T pinout, MAX6388XS18D2-T application, or MAX6388XS18D2-T equivalent, this device delivers precise voltage supervision with dual-monitoring capability, guaranteed reset validity down to VCC = 1V, and automotive-grade AEC-Q100 qualification in a compact 4-pin SC70 package.
Technical Context
The MAX6388XS18D2-T integrates a precision bandgap reference and comparator to monitor VCC against a fixed 1.8V threshold while simultaneously accepting an external voltage via RESET IN, compared to an internal 1.27V reference. Its reset assertion logic triggers on either VCC falling below 1.8V or RESET IN falling below 1.27V, with independent timing control.
It features a push-pull active-high RESET output that transitions high during fault conditions and remains asserted for exactly 20ms after recovery, with guaranteed valid logic states down to VCC = 1V. The device includes negative-going transient immunity and supports manual reset via MR only in sibling parts-not in MAX6388-confirming its dedicated dual-supply monitoring role without manual reset functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.8V ±2.5% (−40°C to +125°C); ensures accurate brownout detection across automotive temperature range |
| Reset Timeout Period | 20ms minimum; guarantees sufficient processor hold time during power recovery |
| Supply Current | 3μA at VCC = 1.8V; enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Voltage Range | 1.0V to 5.5V; supports direct interface with core/logic rails from ultra-low-voltage MCUs to 5V peripherals |
| RESET Output Type | Active-high push-pull; eliminates need for external pullup resistor and simplifies interface to CMOS inputs |
| Auxiliary Input | RESET IN pin referenced to 1.27V; allows user-defined second threshold via resistor divider for dual-rail monitoring |
| Temperature Range | −40°C to +125°C; qualified for under-hood automotive and industrial embedded applications |
Pinout & Package
MAX6388XS18D2-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 1.3mm × 1.6mm × 0.95mm, optimized for high-density PCB layouts in portable and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor rail; powers internal circuitry and sets reference for reset comparator |
| 2 | RESET | Active-high push-pull output; drives high during VCC or RESET IN fault and holds for 20ms post-recovery |
| 3 | GND | Analog/digital ground reference; must be connected directly to system ground plane for noise immunity |
| 4 | RESET IN | High-impedance auxiliary input; compared to internal 1.27V reference to enable secondary voltage supervision |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneously monitors VCC (1.8V) and external rail via RESET IN (1.27V reference), enabling safety-critical dual-rail validation |
| Low quiescent current | 3μA at 1.8V ensures minimal battery drain in always-on monitoring nodes such as telematics or ECU wake-up circuits |
| Guaranteed reset validity | RESET output state remains valid down to VCC = 1V, preventing metastability during deep brownout conditions |
| Negative transient immunity | Rejects short-duration VCC glitches (e.g., <1µs at 100mV overdrive), reducing false resets in electrically noisy environments |
| AEC-Q100 qualified | Qualified per AEC-Q100 Rev G for automotive applications, supporting functional safety requirements in ADAS and body control modules |
Applications
| Automotive Body Control Module | Industrial PLC I/O Card |
|---|---|
Use Scenario: Monitors both 3.3V MCU core supply and 5V sensor interface rail in a vehicle door module. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting active-high RESET to halt MCU execution if either rail drops below threshold. Use Value: Prevents erratic actuator behavior during partial power loss by enforcing synchronized restart of both digital and analog subsystems. |
Use Scenario: Supervises 2.5V FPGA configuration voltage and 12V fieldbus transceiver supply in a modular I/O base unit. IC Role / Device Role / Timing Role: Uses RESET IN to scale 12V down to ~1.27V via resistor divider, enabling single-chip dual-threshold detection. Use Value: Eliminates need for discrete comparators and reduces BOM count while maintaining fail-safe startup sequencing. |
| Battery-Powered Medical Sensor | Smart Energy Meter |
Use Scenario: Ensures reliable boot of an ultra-low-power ARM Cortex-M0+ in a wearable glucose monitor powered by CR2032. IC Role / Device Role / Timing Role: Primary VCC monitor at 1.8V with 20ms timeout, paired with RESET IN for backup LDO supervision. Use Value: Guarantees deterministic reset even during battery sag to 1.2V, extending usable battery life without compromising reliability. |
Use Scenario: Validates both 3.3V metrology SoC supply and 5V RS-485 transceiver rail in a DIN-rail mounted electricity meter. IC Role / Device Role / Timing Role: Provides independent fault detection on two critical rails with shared reset assertion to main controller. Use Value: Enables single-point fault reporting and coordinated firmware recovery, meeting IEC 62056-21 interoperability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6387XS18D2-T | Identical 1.8V threshold, 20ms timeout, and 4-pin SC70 package-but features open-drain active-low RESET output requiring external pullup. | Suitable where system-level reset bus is active-low and shared with other open-drain devices (e.g., legacy μP designs). | Select MAX6387XS18D2-T only when active-low signaling and bus-wire-OR capability are required; otherwise MAX6388XS18D2-T simplifies design. |
| TLV803EA18DBVR | 1.8V threshold, 200ms min timeout, SOT-23-3 package; no RESET IN pin; ±2% accuracy over −40°C to +125°C. | Single-rail supervision only; lacks dual-monitoring capability and has longer timeout, limiting use in fast-recovery systems. | Choose TLV803EA18DBVR for cost-sensitive, single-supply applications where auxiliary monitoring is unnecessary and 200ms hold time is acceptable. |
Compared with MAX6387XS18D2-T, MAX6388XS18D2-T eliminates external pullup components and simplifies timing-critical restarts; versus TLV803EA18DBVR, it adds essential dual-rail supervision for safety-critical systems but requires one additional PCB pad.
Availability
MAX6388XS18D2-T is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, battery-powered medical sensors, and smart energy metering systems requiring stable component supply and long-term lifecycle support.
Supply support for MAX6388XS18D2-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 communications applications, emphasizing reliability, low power, and integration.
The MAX6381–MAX6390 family delivers highly accurate, low-quiescent-current supervisory circuits for microprocessor reset and dual-voltage monitoring in harsh environments-specifically targeting automotive ECUs and industrial edge nodes.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6388XS18D2-T?
The MAX6388XS18D2-T has a factory-trimmed reset threshold of 1.8V with ±2.5% accuracy over the full operating temperature range of −40°C to +125°C. This specification is guaranteed by design and tested across process corners, ensuring consistent brownout detection in automotive and industrial deployments where supply rails may drift significantly with temperature.
Does MAX6388XS18D2-T include a manual reset input (MR)?
No, MAX6388XS18D2-T does not feature a manual reset input. According to the official Maxim Integrated datasheet, MR is present only on MAX6384/MAX6385/MAX6386/MAX6390 variants. MAX6388XS18D2-T is specifically configured for dual-voltage supervision using VCC and RESET IN, with no MR pin allocated in its 4-pin SC70 pinout.
What is the function of the RESET IN pin on MAX6388XS18D2-T?
The RESET IN pin on MAX6388XS18D2-T connects to an internal comparator referenced to 1.27V. When an external voltage divider applies a scaled version of a second supply rail to this pin, the device asserts RESET if that rail falls below the derived threshold. This enables true dual-rail supervision without adding discrete comparators or increasing board area.
Is MAX6388XS18D2-T AEC-Q100 qualified?
Yes, MAX6388XS18D2-T is AEC-Q100 qualified (Grade 0: −40°C to +125°C). The "/V" suffix denotes automotive qualification, and while MAX6388XS18D2-T omits "/V" in its marking, its ordering information confirms availability in /V+T variants-and all MAX6387–MAX6389 parts in XS/SC70 packaging are explicitly listed as AEC-Q100 qualified in the official selector guide.
What package type and dimensions does MAX6388XS18D2-T use?
MAX6388XS18D2-T uses a 4-pin SC70 package (outline 21-0098) measuring 1.3mm × 1.6mm × 0.95mm with a 0.65mm pitch. Its land pattern (90-0187) is optimized for reflow compatibility and thermal performance on multilayer PCBs, making it suitable for compact automotive and portable electronics assemblies.
MAX6388XS18D2-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:
- 1.8V, 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
MAX6388XS18D2-T FAQ
1.How can I place an order for MAX6388XS18D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS18D2-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 MAX6388XS18D2-T reliable?
The price and inventory of MAX6388XS18D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS18D2-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS18D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS18D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS18D2-T?
MAX6388XS18D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS18D2-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 MAX6388XS18D2-T?
For technical support, including MAX6388XS18D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS18D2-T requirements.
6.How does Aetrix verify that MAX6388XS18D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS18D2-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 MAX6388XS18D2-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS18D2-T?
All MAX6388XS18D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS18D2-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 MAX6388XS18D2-T part is unused and in its original packaging.
Return procedure for MAX6388XS18D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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