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Analog Devices Inc./Maxim Integrated MAX6388XS20D3-T
- Part No.:
- MAX6388XS20D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS20D3-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,900
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Product details
Overview
MAX6388XS20D3-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), 140ms minimum VCC 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 MAX6388XS20D3-T datasheet, MAX6388XS20D3-T pinout, MAX6388XS20D3-T application, or MAX6388XS20D3-T equivalent, key selection criteria include its 2.0V reset threshold accuracy, 140ms timeout, 4-pin SC70 package, dual-supply monitoring capability via RESET IN, and guaranteed reset validity down to VCC = 1V.
Technical Context
The MAX6388XS20D3-T integrates a precision voltage comparator monitoring VCC against a fixed 2.0V threshold and a separate auxiliary comparator referenced to +1.27V at the RESET IN pin. Its internal timer ensures reset remains asserted for ≥140ms after VCC recovers above threshold or after RESET IN rises above its set point.
It features an active-high push-pull RESET output capable of sourcing 150µA at 1.0V and sinking 80µA at 1.0V, with logic state guaranteed valid down to VCC = 1V. The RESET IN input draws ≤50nA, enabling high-impedance resistor-divider configuration for user-defined secondary voltage thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.00V ±2.5% (–40°C to +125°C); enables precise brownout detection for 2.0V core rails |
| VCC Operating Range | 1.0V to 5.5V; supports ultra-low-voltage operation down to sub-1.2V logic domains |
| Reset Timeout | 140ms minimum; ensures sufficient μP initialization time after power recovery |
| Supply Current | 3μA at 1.8V; minimizes battery drain in portable equipment |
| RESET Output Type | Active-high push-pull; eliminates need for external pullup and simplifies interface to μP reset inputs |
| Auxiliary Input | RESET IN pin with 1.27V reference; allows independent monitoring of second supply (e.g., I/O voltage) |
| Operating Temp | –40°C to +125°C; qualified for industrial and automotive under-hood applications |
Pinout & Package
MAX6388XS20D3-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 | Main supply input and primary voltage monitor; powers internal circuitry and sets reset condition when falling below 2.0V |
| 2 | RESET | Active-high push-pull output; drives high during reset assertion, deasserts low after timeout completes |
| 3 | GND | Ground reference for all internal comparators, timers, and output drivers |
| 4 | RESET IN | Auxiliary voltage monitor input; compared to internal 1.27V reference; reset asserts if voltage falls below threshold |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply monitoring | Simultaneous VCC (2.0V) and RESET IN (user-adjustable via resistor divider) supervision enables robust dual-rail systems |
| Low-power operation | 3μA supply current at 1.8V extends battery life in portable instrumentation and IoT edge nodes |
| Guaranteed reset validity | RESET output logic state remains valid down to VCC = 1V, ensuring deterministic behavior during deep brownout |
| Negative transient immunity | Immune to short-duration VCC glitches (e.g., <1µs at 100mV overdrive), reducing false resets in noisy environments |
| High-impedance RESET IN | ≤50nA input leakage allows use of MΩ-range resistors in voltage dividers without accuracy degradation |
Applications
| Industrial PLC I/O Modules | Battery-Powered Medical Sensors |
|---|---|
Use Scenario: Monitoring both 3.3V I/O supply and 1.8V FPGA core rail in programmable logic controllers. IC Role / Device Role / Timing Role: Dual-threshold supervisor asserting reset if either rail drops below safe operating level, with 140ms hold time ensuring FPGA configuration stability. Use Value: Prevents partial configuration corruption by guaranteeing full reset assertion during simultaneous rail sag. | Use Scenario: Power management in wearable ECG monitors using coin-cell batteries. IC Role / Device Role / Timing Role: Supervises 2.0V analog front-end supply and 1.2V MCU core via RESET IN divider, with ultra-low 3μA quiescent current. Use Value: Extends operational lifetime by minimizing standby current while maintaining fail-safe reset coverage. |
| Automotive Body Control Units | Smart Energy Metering Systems |
Use Scenario: Reset coordination across 5V CAN transceiver and 3.3V microcontroller in under-hood ECUs. IC Role / Device Role / Timing Role: Uses RESET IN to monitor 5V rail while VCC tracks 3.3V domain; asserts active-high RESET to both subsystems. Use Value: Eliminates need for two discrete supervisors, reducing BOM count and PCB area in AEC-Q100-compliant designs. | Use Scenario: Dual-rail supervision in polyphase electricity meters with isolated 3.3V communication and 2.5V metrology ADC supplies. IC Role / Device Role / Timing Role: VCC monitors 2.5V metrology rail; RESET IN monitors 3.3V isolation barrier supply via 1.27V reference divider. Use Value: Ensures synchronized reset across safety-isolated domains, preventing data corruption during power sequencing faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6387XS20D3-T | Same 2.0V threshold and 140ms timeout, but open-drain active-low RESET output requiring external pullup | Suitable where system-level reset bus is shared with other open-drain devices (e.g., I²C-compatible reset networks) | Select MAX6387XS20D3-T only if active-low signaling and bus-wired reset topology are required |
| TLV809E20DBZR | 2.0V threshold, 140ms timeout, active-high push-pull, but no RESET IN input and higher 6μA ICC at 1.8V | Applicable in single-rail systems where auxiliary monitoring is unnecessary and slightly higher quiescent current is acceptable | Choose TLV809E20DBZR for cost-sensitive, single-supply applications without dual-monitoring needs |
Compared with MAX6387XS20D3-T, MAX6388XS20D3-T eliminates external pullup components and simplifies timing analysis with active-high drive; versus TLV809E20DBZR, it adds critical dual-supply fault coverage at lower quiescent current, justifying use in safety-critical dual-rail systems.
Availability
MAX6388XS20D3-T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, battery-powered medical sensors, automotive body control units, and smart energy metering systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6388XS20D3-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 reliability, low power, and integration.
The MAX6381–MAX6390 family delivers single/dual low-voltage microprocessor reset circuits optimized for space-constrained, battery-sensitive, and high-temperature embedded systems requiring guaranteed reset behavior during brownout and transient events.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6388XS20D3-T?
The MAX6388XS20D3-T has a factory-set reset threshold of 2.00V with ±2.5% accuracy over the full operating temperature range of –40°C to +125°C. This specification is guaranteed by design and applies to both VCC monitoring and the internal reference used for RESET IN comparison, ensuring consistent trip points across environmental conditions.
Does MAX6388XS20D3-T support monitoring of a second voltage rail?
Yes, MAX6388XS20D3-T includes a dedicated RESET IN pin referenced to an internal +1.27V comparator. By connecting an external resistor divider to this pin, users can configure a custom threshold for monitoring a second voltage rail-such as an I/O supply-while VCC monitors the core supply. Reset asserts if either voltage falls below its respective threshold.
What is the function of the RESET output on MAX6388XS20D3-T?
The RESET output of MAX6388XS20D3-T is an active-high push-pull driver. It asserts high when VCC drops below 2.0V or when the voltage at RESET IN falls below its configured threshold, and remains high for a minimum of 140ms after recovery. It deasserts low once the timeout expires, providing direct compatibility with microprocessors requiring active-high reset signals.
What package type and dimensions does MAX6388XS20D3-T use?
MAX6388XS20D3-T is packaged in a lead(Pb)-free, RoHS-compliant 4-pin SC70 package (outline number 21-0098). Its footprint measures 2.0mm × 2.1mm with a maximum height of 0.95mm, and it uses land pattern 90-0187-optimized for high-density PCB layouts in portable and automotive electronics.
How much supply current does MAX6388XS20D3-T consume at low voltages?
MAX6388XS20D3-T consumes only 3μA of supply current at VCC = 1.8V and 6μA at VCC = 3.6V, as specified in the Electrical Characteristics table. This ultra-low quiescent current is maintained across the full –40°C to +125°C temperature range, making it ideal for always-on battery-powered applications where standby power budget is critical.
MAX6388XS20D3-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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS20D3-T FAQ
1.How can I place an order for MAX6388XS20D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS20D3-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 MAX6388XS20D3-T reliable?
The price and inventory of MAX6388XS20D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS20D3-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS20D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS20D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS20D3-T?
MAX6388XS20D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS20D3-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 MAX6388XS20D3-T?
For technical support, including MAX6388XS20D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS20D3-T requirements.
6.How does Aetrix verify that MAX6388XS20D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS20D3-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 MAX6388XS20D3-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS20D3-T?
All MAX6388XS20D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS20D3-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 MAX6388XS20D3-T part is unused and in its original packaging.
Return procedure for MAX6388XS20D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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