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Analog Devices Inc./Maxim Integrated MAX6388XS31D7-T
- Part No.:
- MAX6388XS31D7-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS31D7-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,984
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Product details
Overview
MAX6388XS31D7-T from Maxim Integrated is a low-power, dual-voltage microprocessor supervisory circuit with active-high push-pull reset output, 3.08V factory-set VCC reset threshold (±2.5% over -40°C to +125°C), 1200ms minimum VCC reset timeout, and auxiliary RESET IN input for monitoring a second voltage. 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 MAX6388XS31D7-T datasheet, MAX6388XS31D7-T pinout, MAX6388XS31D7-T application, or MAX6388XS31D7-T equivalent, key selection considerations include its 4-pin SC70 package, dual-monitoring capability (VCC + RESET IN), guaranteed reset validity down to VCC = 1V, and automotive-grade AEC-Q100 qualification (indicated by /V suffix in related variants).
Technical Context
The MAX6388XS31D7-T integrates two independent voltage comparators: one monitors VCC against a fixed 3.08V threshold, while the other compares an external voltage applied to the RESET IN pin against an internal 1.27V reference. Reset assertion occurs if either comparator trips, and the active-high push-pull output remains asserted for ≥1200ms after recovery.
It features no manual reset input (MR) - distinguishing it from MAX6384–MAX6386 and MAX6390 - and relies solely on VCC and RESET IN monitoring. Its 4-pin SC70 package omits NC pins present in 6-pin μDFN versions, optimizing board space for compact designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.08V ±2.5% (−40°C to +125°C); ensures reliable brownout detection across automotive temperature range |
| RESET Timeout Period | 1200ms min; guarantees sufficient processor hold time during power recovery |
| Supply Current | 3μA at +1.8V; enables multi-year battery life in portable equipment |
| Operating Voltage Range | 1.0V to 5.5V; supports valid reset state down to near-fully discharged batteries |
| RESET Output Type | Active-high push-pull; eliminates need for external pullup resistor, simplifying BOM |
| RESET IN Threshold | 1.27V ±2.5% (−40°C to +125°C); enables precise secondary voltage monitoring via resistor divider |
| Package | 4-pin SC70 (X4+1); 1.3mm × 1.3mm footprint ideal for space-constrained PCBs |
Pinout & Package
MAX6388XS31D7-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), optimized for high-density layouts. Pin 1 is RESET (active-high push-pull), Pin 2 is VCC, Pin 3 is RESET IN, and Pin 4 is GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push-pull reset output; drives high when VCC or RESET IN falls below threshold; holds high for ≥1200ms after recovery |
| 2 | VCC | Main supply input and primary voltage monitor; powers internal circuitry and sets reset condition for core rail |
| 3 | RESET IN | Auxiliary voltage monitor input; compared to internal 1.27V reference; enables user-defined secondary reset threshold via resistor divider |
| 4 | GND | Ground reference for all internal comparators and output driver; must be low-impedance connection for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises main VCC (3.08V) and auxiliary rail (via RESET IN), enabling robust dual-rail systems without extra ICs |
| Guaranteed reset validity down to VCC = 1V | Ensures deterministic reset behavior even during deep brownout, critical for fail-safe operation in automotive ECUs |
| Negative-going VCC transient immunity | Rejects short-duration supply glitches (e.g., <1µs at 100mV overdrive), reducing false resets in noisy environments |
| Low quiescent current (3μA @ 1.8V) | Minimizes standby power draw in battery-powered IoT sensors and wearables |
| AEC-Q100 qualified variant available | Supports automotive applications requiring reliability validation; /V suffix denotes qualification (e.g., MAX6388XS31D7/V+T) |
Applications
| Automotive Body Control Module | Industrial PLC I/O Subsystem |
|---|---|
Use Scenario: Monitoring 3.3V microcontroller supply and 2.5V sensor interface rail in a vehicle door module. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting active-high reset to MCU when either rail drops below threshold; 1200ms timeout prevents premature boot during alternator load dump recovery. Use Value: Eliminates need for two discrete supervisors, reducing BOM count and PCB area while meeting ISO 16750-2 pulse immunity requirements. | Use Scenario: Ensuring safe startup and fault recovery of fieldbus communication ICs powered by separate 5V and 3.3V supplies in a programmable logic controller. IC Role / Device Role / Timing Role: Primary reset generator coordinating power-on sequencing; RESET IN monitors isolated 3.3V domain while VCC monitors main 5V rail. Use Value: Prevents bus lockup due to asynchronous power-up; 1200ms timeout accommodates slow-ramping industrial power supplies. |
| Medical Portable Diagnostic Device | Battery-Powered Wireless Sensor Node |
Use Scenario: Supervising 1.8V SoC core voltage and 3.0V display backlight supply in a handheld ultrasound unit. IC Role / Device Role / Timing Role: Dual-threshold supervisor triggering system-wide reset if either rail collapses during battery depletion or ESD event. Use Value: Maintains data integrity during low-battery shutdown; 3μA supply current extends single-charge runtime by >15% versus higher-current alternatives. | Use Scenario: Monitoring coin-cell–powered 3.0V MCU supply and 2.2V RF transceiver supply in a LoRaWAN environmental sensor. IC Role / Device Role / Timing Role: Low-power dual-supply monitor ensuring synchronized reset of MCU and radio before transmission failure. Use Value: Enables reliable wake-up/reset under weak battery conditions (down to 1.0V VCC); eliminates external pullup resistor, saving 0.2mm² PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT31D7-T | Same electrical specs but in 6-pin μDFN package; includes NC pins not used in SC70 version | Requires larger PCB footprint (2.0mm × 2.0mm vs. 1.3mm × 1.3mm); better thermal performance (θJA = 477°C/W vs. 322.6°C/W) | Select when board layout allows larger package and higher power dissipation margin is needed |
| TLV809E31DBZR | Single-supply (3.08V threshold), no RESET IN input; 140ms reset timeout; SOT-23-3 package | Lacks dual-monitoring capability and long 1200ms timeout; suitable only for basic VCC-only supervision | Choose only if auxiliary rail monitoring is unnecessary and shorter reset duration is acceptable |
Compared with MAX6388XS31D7-T, the μDFN variant offers thermal headroom at the cost of area, while TLV809E31DBZR sacrifices dual-rail functionality and timing flexibility for minimal size and cost - making MAX6388XS31D7-T the sole option supporting both RESET IN and 1200ms timeout in a 4-pin SC70.
Availability
MAX6388XS31D7-T is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC subsystems, medical portable diagnostics, and battery-powered wireless sensor nodes requiring stable component supply, AEC-Q100-aligned reliability, and compact dual-voltage supervision.
Supply support for MAX6388XS31D7-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 computing applications, emphasizing low power, high reliability, and small form factors.
The MAX6381–MAX6390 family delivers ultra-low-power microprocessor supervisory circuits with configurable reset thresholds, multiple timeout options, and dual-voltage monitoring - engineered for fail-safe operation in safety-critical embedded systems.
FAQ
What is the exact reset threshold voltage of MAX6388XS31D7-T and how stable is it over temperature?
The MAX6388XS31D7-T has a factory-set VCC reset threshold of 3.08V, with guaranteed accuracy of ±2.5% over the full operating temperature range of −40°C to +125°C. This stability is achieved using laser-trimmed references and BiCMOS process technology, ensuring consistent brownout detection in automotive and industrial environments where ambient temperature swings are extreme.
Does MAX6388XS31D7-T support manual reset functionality?
No, MAX6388XS31D7-T does not include a manual reset (MR) input. It belongs to the MAX6387/MAX6388/MAX6389 subgroup, which features only VCC and RESET IN monitoring. For manual reset capability, consider MAX6384–MAX6386 or MAX6390 variants - the MAX6388XS31D7-T is purpose-built for autonomous dual-rail supervision without external trigger inputs.
How is the auxiliary RESET IN pin used in MAX6388XS31D7-T, and what voltage does it monitor?
The RESET IN pin on MAX6388XS31D7-T connects to an internal comparator referenced to 1.27V ±2.5%. To monitor a secondary voltage (e.g., 2.5V or 5V rail), apply it through a resistor divider so that the voltage at RESET IN equals 1.27V when the target rail reaches its desired trip point. The MAX6388XS31D7-T asserts reset if either VCC drops below 3.08V or the divided RESET IN voltage falls below 1.27V.
What package type and dimensions does MAX6388XS31D7-T use, and is it RoHS-compliant?
MAX6388XS31D7-T uses a 4-pin SC70 package (outline 21-0098) measuring 1.3mm × 1.3mm × 0.9mm with a 0.65mm pin pitch. The "+T" suffix confirms it is lead(Pb)-free and RoHS-compliant. This ultra-compact package enables high-density routing in space-constrained applications like wearable medical devices and automotive ADAS modules.
Can MAX6388XS31D7-T operate reliably at very low supply voltages, and down to what VCC level is reset guaranteed?
Yes, MAX6388XS31D7-T guarantees correct reset output logic state down to VCC = 1.0V, per its Absolute Maximum Ratings and Electrical Characteristics. This ensures fail-safe behavior during deep brownout or battery exhaustion - unlike many supervisors that become undefined below 1.5V. The active-high push-pull output remains functional and valid throughout this range, making MAX6388XS31D7-T suitable for energy-harvesting and long-life battery systems.
MAX6388XS31D7-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:
- 3.08V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 1.2s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS31D7-T FAQ
1.How can I place an order for MAX6388XS31D7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS31D7-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 MAX6388XS31D7-T reliable?
The price and inventory of MAX6388XS31D7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS31D7-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS31D7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS31D7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS31D7-T?
MAX6388XS31D7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS31D7-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 MAX6388XS31D7-T?
For technical support, including MAX6388XS31D7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS31D7-T requirements.
6.How does Aetrix verify that MAX6388XS31D7-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS31D7-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 MAX6388XS31D7-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS31D7-T?
All MAX6388XS31D7-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS31D7-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 MAX6388XS31D7-T part is unused and in its original packaging.
Return procedure for MAX6388XS31D7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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