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Analog Devices Inc./Maxim Integrated MAX6388XS31D1-T
- Part No.:
- MAX6388XS31D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS31D1-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,412
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Product details
Overview
MAX6388XS31D1-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 3.08V VCC reset threshold (±2.5% over -40°C to +125°C), 140ms minimum 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 controllers and intelligent instrumentation requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6388XS31D1-T datasheet, MAX6388XS31D1-T pinout, MAX6388XS31D1-T application, or MAX6388XS31D1-T equivalent, this page delivers verified specifications, SC70-4 package layout, dual-supply monitoring capability, automotive-grade AEC-Q100 qualification (via /V suffix variants), and direct alternatives with documented timing and output topology differences.
Technical Context
The MAX6388XS31D1-T integrates a precision voltage comparator for VCC monitoring and a separate +1.27V reference-based comparator for the RESET IN pin, enabling independent detection of two supply rails. Its internal timer ensures reset assertion for ≥140ms after VCC or RESET IN recovers above their respective thresholds.
This device uses BiCMOS process technology, supports operation from 1.0V to 5.5V supply, and features negative-going VCC transient immunity up to 35µs at 100mV overdrive. The RESET output remains logic-valid during brownout conditions down to VCC = 1V, eliminating need for external level-shifting in low-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.08V nominal, ±2.5% over -40°C to +125°C - ensures stable reset activation across automotive temperature range |
| Reset Timeout Period | 140ms minimum - provides sufficient hold time for slow-ramping microcontrollers during power-up |
| Supply Current | 3μA at +1.8V - enables multi-year battery life in portable equipment without compromising supervision reliability |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup resistor and drives high-impedance loads directly |
| Auxiliary Input | RESET IN pin with 1.27V internal reference - allows user-defined second-voltage threshold via resistor divider |
| Operating Voltage Range | 1.0V to 5.5V - supports supervision of core, I/O, and auxiliary rails in modern mixed-voltage SoC designs |
| Reset Assertion Delay | 35µs max for VCC falling edge - rejects short transients while responding promptly to true brownouts |
Pinout & Package
MAX6388XS31D1-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 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 fixed reset threshold |
| 2 | RESET | Active-high push-pull output; asserts high when VCC or RESET IN falls below threshold; deasserts after 140ms timeout |
| 3 | GND | Ground reference for all internal comparators, timers, and output stage; must be low-impedance connection |
| 4 | RESET IN | Auxiliary voltage monitor input; compared to internal 1.27V reference; enables dual-rail supervision without external components |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneous monitoring of VCC and external rail via RESET IN pin with 1.27V reference - reduces BOM count in multi-rail systems |
| Low-power operation | 3μA supply current at +1.8V - extends battery runtime in always-on IoT sensors and wearables |
| Automotive-ready accuracy | ±2.5% reset threshold tolerance over -40°C to +125°C - meets AEC-Q100 requirements for under-hood applications |
| Transient-immune design | Rejects VCC glitches ≤35µs at 100mV overdrive - prevents spurious resets in electrically noisy environments |
| Valid reset down to 1V | Guaranteed logic-state integrity on RESET pin even as VCC drops to 1.0V - ensures deterministic behavior during deep brownout |
Applications
| Industrial Controller Power Management | Battery-Powered Medical Sensor Node |
|---|---|
|
Use Scenario: Supervises 3.3V main supply and 1.8V sensor rail in programmable logic controller I/O module. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting active-high reset to ARM Cortex-M4 MCU upon either rail dropout; 140ms timeout aligns with FPGA configuration time. Use Value: Prevents firmware corruption during partial power loss by holding MCU in reset until both supplies stabilize. |
Use Scenario: Monitors coin-cell-backed 3.0V system rail and 1.2V analog front-end supply in wearable ECG patch. IC Role / Device Role / Timing Role: Provides fail-safe reset initiation using RESET IN for ultra-low-voltage analog section; active-high push-pull drives MCU reset pin directly. Use Value: Eliminates external pullup and saves PCB area in 8mm × 8mm wearable form factor while ensuring sub-1.8V brownout detection. |
| Automotive Body Control Module | Smart Energy Meter with Dual Supplies |
|
Use Scenario: Used in 12V-to-3.3V/1.2V DC-DC powered BCM to supervise MCU and CAN transceiver supplies. IC Role / Device Role / Timing Role: Resets Infineon AURIX TC3xx MCU when either 3.3V domain or 1.2V core drops; operates across full AEC-Q100 temp range. Use Value: Enables single-chip dual-rail supervision meeting ISO 16750-2 pulse test requirements for load dump immunity. |
Use Scenario: Supervises 5V metering ASIC supply and 3.3V communication interface in smart electricity meter. IC Role / Device Role / Timing Role: Asserts reset to metering SoC if 5V rail sags during surge events; RESET IN monitors isolated RS-485 interface supply. Use Value: Guarantees data integrity during grid transients by synchronizing reset across measurement and comms subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS31D1-T | Same 3.08V threshold and 140ms timeout, but includes manual reset (MR) input instead of RESET IN | Suitable where operator-initiated reset is required; not usable for dual-voltage monitoring | Select MAX6385XS31D1-T if manual reset functionality is needed and auxiliary voltage monitoring is unnecessary |
| TLV809E31DBVR | 3.08V threshold, 140ms timeout, active-high push-pull, but no auxiliary input; 1.8–6V operating range | Lacks RESET IN capability; lower quiescent current (0.5μA) but no dual-rail support | Choose TLV809E31DBVR for cost-sensitive, single-rail applications where space and power are critical but dual monitoring is not required |
Compared with MAX6388XS31D1-T, MAX6385XS31D1-T adds manual reset at the expense of auxiliary voltage monitoring, while TLV809E31DBVR offers lower power and broader voltage range but omits dual-supply capability entirely - selection depends on whether MR functionality or RESET IN is prioritized in the system architecture.
Availability
MAX6388XS31D1-T is available at Aetrix Electronics and suitable for industrial controllers, battery-powered medical devices, automotive body electronics, and smart energy meters requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6388XS31D1-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, with emphasis on low-power, high-reliability solutions.
The MAX6381–MAX6390 family was developed specifically for microprocessor reset supervision in space- and power-constrained systems, supporting dual-voltage monitoring, automotive temperature range, and ultra-low quiescent current.
FAQ
What is the exact reset threshold voltage of MAX6388XS31D1-T and how stable is it over temperature?
The MAX6388XS31D1-T has a factory-set nominal VCC reset threshold of 3.08V, with ±2.5% tolerance guaranteed over the full -40°C to +125°C operating range. This stability is achieved through laser-trimmed internal references and BiCMOS process optimization, making MAX6388XS31D1-T suitable for automotive and industrial applications where thermal drift must be tightly controlled.
Does MAX6388XS31D1-T support monitoring of two independent power rails?
Yes, MAX6388XS31D1-T supports dual-rail supervision: VCC is monitored against its fixed 3.08V threshold, while the RESET IN pin compares an external voltage to an internal +1.27V reference. When either rail drops below its respective threshold, MAX6388XS31D1-T asserts its active-high RESET output for the full 140ms timeout period.
What package type and footprint does MAX6388XS31D1-T use?
MAX6388XS31D1-T is supplied in a 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. This RoHS-compliant, lead-free package is optimized for reflow soldering and supports high-density PCB layouts in portable and automotive modules.
How does the RESET output behave during deep brownout conditions?
MAX6388XS31D1-T guarantees valid logic states on its active-high push-pull RESET output down to VCC = 1.0V. Unlike open-drain or some CMOS reset ICs, it maintains defined high/low drive capability throughout the entire 1.0V–5.5V operating range, ensuring deterministic MCU reset behavior even during severe undervoltage events.
Is MAX6388XS31D1-T qualified for automotive applications?
While MAX6388XS31D1-T itself carries the RoHS-compliant "+T" suffix, automotive qualification requires the "/V" variant (e.g., MAX6388XS31D1/V+T). The underlying MAX6388 design is AEC-Q100 qualified, and the /V versions undergo additional stress testing and screening per automotive standards - confirm ordering code suffix before deployment in vehicle systems.
MAX6388XS31D1-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:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS31D1-T FAQ
1.How can I place an order for MAX6388XS31D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS31D1-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 MAX6388XS31D1-T reliable?
The price and inventory of MAX6388XS31D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS31D1-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS31D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS31D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS31D1-T?
MAX6388XS31D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS31D1-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 MAX6388XS31D1-T?
For technical support, including MAX6388XS31D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS31D1-T requirements.
6.How does Aetrix verify that MAX6388XS31D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS31D1-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 MAX6388XS31D1-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS31D1-T?
All MAX6388XS31D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS31D1-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 MAX6388XS31D1-T part is unused and in its original packaging.
Return procedure for MAX6388XS31D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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