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Analog Devices Inc./Maxim Integrated MAX6388XS28D2-T
- Part No.:
- MAX6388XS28D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS28D2-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,011
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Product details
Overview
MAX6388XS28D2-T from Maxim Integrated is a low-power, dual-voltage microprocessor supervisory circuit with active-high push-pull reset output, 2.80V factory-set VCC reset threshold (±2.5% over −40°C to +125°C), 20ms minimum reset timeout, and auxiliary RESET IN input for monitoring a second voltage rail. 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 MAX6388XS28D2-T datasheet, MAX6388XS28D2-T pinout, MAX6388XS28D2-T application, or MAX6388XS28D2-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 (denoted by /V suffix variants).
Technical Context
The MAX6388XS28D2-T integrates two independent voltage comparators: one monitors VCC against a precision 2.80V threshold with ±2.5% accuracy over temperature, and the other compares an external voltage at RESET IN to a stable 1.27V internal reference. Reset assertion occurs if either comparator trips, and the active-high push-pull output remains asserted for exactly 20ms after recovery.
It features a dedicated RESET IN terminal with <±1nA leakage and 4.5μs propagation delay, supporting user-defined secondary thresholds via resistor-divider networks. The device guarantees correct reset logic state down to VCC = 1V and exhibits immunity to negative-going VCC transients up to 35μs at 100mV overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.80V ±2.5% (−40°C to +125°C); ensures accurate brownout detection across automotive/industrial temperature range |
| Reset Timeout Period | 20ms minimum; provides sufficient hold time for μP initialization before release |
| 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 legacy 5V, modern 3.3V/2.5V, and ultra-low-voltage 1.8V/1.2V rails |
| RESET IN Threshold | 1.27V ±2.5% (−40°C to +125°C); allows precise secondary voltage monitoring with external resistor divider |
| Reset Output Type | Active-high push-pull; eliminates need for external pullup resistor and drives CMOS/TTL loads directly |
| Package | 4-pin SC70 (X4+1 outline); 1.1mm × 1.1mm footprint ideal for wearables and portable medical devices |
Pinout & Package
MAX6388XS28D2-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 1.1mm × 1.1mm × 0.5mm with gull-wing leads. This compact, surface-mount package supports high-density PCB layouts and reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor rail; powers internal circuitry and sets reset threshold reference |
| 2 | RESET | Active-high push-pull reset output; asserts high during fault conditions and holds for 20ms post-recovery |
| 3 | GND | Analog/digital ground reference; must be connected to system ground plane for stable comparator operation |
| 4 | RESET IN | Auxiliary voltage monitor input; compared to 1.27V internal reference to detect secondary rail faults |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises VCC (2.80V) and external rail via RESET IN (1.27V reference), enabling dual-rail systems without extra ICs |
| Guaranteed reset validity down to VCC = 1V | Ensures deterministic reset behavior during deep brownout or ultra-low-power wake-up sequences |
| Negative-going VCC transient immunity | Withstands ≤35μs glitches at 100mV overdrive, reducing false resets in electrically noisy environments |
| Low 3μA supply current at 1.8V | Extends battery life in always-on monitoring applications such as remote sensors and asset trackers |
| AEC-Q100 qualified variants available | Supports automotive infotainment, ADAS, and body electronics where reliability and temperature robustness are critical |
Applications
| Industrial PLC I/O Module | Battery-Powered Medical Sensor |
|---|---|
Use Scenario: Monitors both 3.3V logic supply and 2.5V analog sensor rail in a DIN-rail mounted controller. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting active-high reset to ARM Cortex-M4 MCU upon any rail drop below threshold. Use Value: Prevents firmware corruption during field-induced voltage sags while eliminating need for discrete comparators and timers. |
Use Scenario: Powers continuous glucose monitor with coin-cell battery and dual 1.8V (MCU) and 2.8V (RF transceiver) supplies. IC Role / Device Role / Timing Role: Resets nRF52840 SoC when either supply falls below spec, using 20ms timeout aligned with BLE stack initialization timing. Use Value: Achieves >5-year shelf life via 3μA quiescent current and avoids premature shutdown due to transient load spikes. |
| Automotive Telematics Unit | Dual-Rail FPGA Configuration System |
Use Scenario: Supervises 5.0V CAN transceiver supply and 1.2V FPGA core voltage in vehicle tracking hardware. IC Role / Device Role / Timing Role: Uses RESET IN to monitor FPGA core rail while VCC tracks main 5V bus; asserts reset on first fault detected. Use Value: Meets AEC-Q100 Grade 2 requirements and prevents configuration lockup during cold-crank events. |
Use Scenario: Ensures Xilinx Spartan-7 FPGA receives valid configuration clock and data only after both 3.3V I/O and 1.0V core supplies stabilize. IC Role / Device Role / Timing Role: Generates synchronized active-high reset pulse to FPGA PROG_B and INIT_B pins after dual-rail validation. Use Value: Eliminates configuration failures caused by staggered power sequencing in high-reliability industrial controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388XS28D3-T | Same 2.80V threshold and 4-pin SC70 package, but 140ms reset timeout instead of 20ms | Suitable for systems requiring longer reset hold time (e.g., complex bootloaders or FPGA configuration) | Select when extended reset assertion improves system stability during slow-start power supplies |
| TPS3808G125DBVR | 2.5V threshold, 20ms timeout, SOT-23-5 package; no RESET IN input; ±0.5% threshold accuracy | Lacks dual-monitoring capability but offers tighter threshold tolerance for precision analog subsystems | Choose when single-rail supervision suffices and higher accuracy outweighs loss of auxiliary monitoring |
Compared with MAX6388XS28D2-T, the MAX6388XS28D3-T extends reset duration for slower peripherals, while the TPS3808G125DBVR trades dual monitoring for superior threshold accuracy and smaller footprint-enabling trade-offs between supervision breadth and precision.
Availability
MAX6388XS28D2-T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, battery-powered medical sensors, automotive telematics units, and dual-rail FPGA configuration systems requiring stable component supply, long-term lifecycle support, and AEC-Q100–capable alternatives.
Supply support for MAX6388XS28D2-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, mixed-signal, and power management ICs for demanding industrial, automotive, and computing applications.
The MAX6381–MAX6390 family delivers ultra-low-power, multi-threshold microprocessor supervisors optimized for space-constrained, battery-sensitive, and high-reliability embedded systems requiring dual-rail monitoring and guaranteed reset behavior across extreme temperatures.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6388XS28D2-T?
The MAX6388XS28D2-T has a factory-set VCC reset threshold of 2.80V with ±2.5% accuracy over the full operating temperature range of −40°C to +125°C. This value is confirmed in the Reset Thresholds table of the datasheet (suffix "28"), and applies specifically to the MAX6388XS28D2-T variant-not inferred from adjacent part numbers. The threshold is trimmed during production and guaranteed by design testing.
Does MAX6388XS28D2-T support monitoring a second voltage rail, and how is it implemented?
Yes, MAX6388XS28D2-T supports dual-rail monitoring via its dedicated RESET IN pin, which connects to an internal comparator referenced to a precise 1.27V bandgap. To monitor a second voltage (e.g., 2.5V or 3.3V), apply it to RESET IN through a resistor divider that scales it to 1.27V. The MAX6388XS28D2-T asserts reset if either VCC drops below 2.80V or the scaled RESET IN voltage falls below 1.27V.
What is the function and electrical behavior of the RESET output on MAX6388XS28D2-T?
The RESET output of MAX6388XS28D2-T is an active-high push-pull driver. It remains low during normal operation and transitions high when VCC falls below 2.80V or RESET IN drops below 1.27V. After recovery, it stays high for a guaranteed minimum of 20ms before returning low. It can source/sink ≥800µA/≥1.2mA respectively and is valid down to VCC = 1V-no external pullup required.
Is MAX6388XS28D2-T qualified for automotive applications, and what does the "/V" suffix indicate?
The base MAX6388XS28D2-T is not automotive-qualified; however, Maxim offers /V-suffixed variants (e.g., MAX6388XS28D2/V+T) that are AEC-Q100 Grade 2 qualified (−40°C to +105°C ambient). The "/V" denotes automotive qualification-including enhanced process controls, extended temperature validation, and failure-mechanism testing. The MAX6388XS28D2-T itself is rated for −40°C to +125°C junction temperature but lacks formal AEC-Q100 certification.
What package type and dimensions does MAX6388XS28D2-T use, and is it RoHS-compliant?
MAX6388XS28D2-T uses a 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 1.1mm × 1.1mm × 0.5mm with gull-wing leads. It is RoHS-compliant and lead(Pb)-free, indicated by the "+T" suffix in the ordering code. The package supports standard reflow profiles and is compatible with automated pick-and-place assembly.
MAX6388XS28D2-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:
- 2.8V, 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
MAX6388XS28D2-T FAQ
1.How can I place an order for MAX6388XS28D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS28D2-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 MAX6388XS28D2-T reliable?
The price and inventory of MAX6388XS28D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS28D2-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS28D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS28D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS28D2-T?
MAX6388XS28D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS28D2-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 MAX6388XS28D2-T?
For technical support, including MAX6388XS28D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS28D2-T requirements.
6.How does Aetrix verify that MAX6388XS28D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS28D2-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 MAX6388XS28D2-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS28D2-T?
All MAX6388XS28D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS28D2-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 MAX6388XS28D2-T part is unused and in its original packaging.
Return procedure for MAX6388XS28D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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