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Analog Devices Inc./Maxim Integrated MAX6388XS25D3-T
- Part No.:
- MAX6388XS25D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS25D3-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,237
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Product details
Overview
The MAX6388XS25D3-T from Maxim Integrated is a low-power, single-supply microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.50V 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 operates from 1.0V to 5.5V supply and consumes only 3μA at 1.8V, enabling reliable power-on reset in battery-powered embedded controllers.
For engineers reviewing the MAX6388XS25D3-T datasheet, MAX6388XS25D3-T pinout, MAX6388XS25D3-T application, or MAX6388XS25D3-T equivalent, key selection criteria include its 2.50V threshold accuracy, 140ms VCC reset delay, 4-pin SC70 package, RESET IN comparator referenced to +1.27V, and guaranteed reset validity down to VCC = 1V.
Technical Context
This device implements a precision voltage comparator with ±2.5% threshold accuracy over full automotive temperature range (-40°C to +125°C) and a monolithic timer generating a fixed 140ms minimum reset assertion period after VCC recovery. The internal +1.27V reference enables user-configurable secondary reset detection via external resistor divider on RESET IN.
The MAX6388XS25D3-T features an active-high push-pull RESET output capable of sourcing 500µA at VCC ≥ 2.5V while maintaining VOH ≥ 0.8×VCC, and guarantees correct logic state down to VCC = 1V. Its RESET IN input exhibits ≤50nA leakage and 4.5µs propagation delay from threshold crossing to RESET assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.50V nominal, ±2.5% over -40°C to +125°C - ensures accurate brownout detection across automotive temperature range |
| Reset Timeout Period | 140ms minimum - provides sufficient hold time for microprocessor initialization after power stabilization |
| 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 1.2V/1.8V/2.5V/3.3V/5V logic domains |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup resistor and reduces BOM count |
| RESET IN Threshold | +1.27V internal reference - allows precise secondary voltage monitoring using two external resistors |
| Reset Propagation Delay | 35µs (VCC falling), 4.5µs (RESET IN falling) - ensures fast response to supply transients and auxiliary fault conditions |
Pinout & Package
MAX6388XS25D3-T uses a 4-pin SC70 package (outline 21-0098, land pattern 90-0187) with 0.65mm pitch and thermal resistance θJA = 322.6°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor - powers internal circuitry and triggers reset when below 2.50V threshold |
| 2 | RESET | Active-high push-pull output - drives high during reset assertion; sinks 1.2mA at VCC ≥ 2.5V with VOL ≤ 0.3V |
| 3 | RESET IN | Auxiliary voltage monitor input - compared to +1.27V reference; asserts reset if external divided voltage falls below threshold |
| 4 | GND | Ground reference - common return path for VCC, RESET, and RESET IN; required for proper comparator operation |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneous monitoring of VCC (2.50V threshold) and external rail via RESET IN with +1.27V reference |
| Low-power operation | 3μA supply current at 1.8V enables >10-year battery life in portable medical monitors |
| Guaranteed reset validity | Correct RESET logic state maintained down to VCC = 1V - critical for graceful shutdown in deep brownout |
| Negative transient immunity | Rejects VCC glitches up to 150µs duration when overdrive is <100mV - prevents spurious resets in noisy environments |
| Automotive qualification | AEC-Q100 qualified (per /V version ordering info) - suitable for under-hood and infotainment applications |
Applications
| Industrial PLC Controller | Battery-Powered Sensor Node |
|---|---|
Use Scenario: Monitors 3.3V I/O supply and 1.2V core voltage in programmable logic controller CPU module. IC Role / Device Role / Timing Role: Primary supervisor for main VCC and secondary detector for core rail via RESET IN divider network. Use Value: Prevents firmware corruption during partial power loss by asserting reset when either rail drops below safe operating level. |
Use Scenario: Powers ultra-low-power environmental sensor with coin-cell battery and 3.0V LDO regulator. IC Role / Device Role / Timing Role: Ensures clean boot sequence after cold start and detects battery depletion via VCC threshold monitoring. Use Value: 3μA quiescent current extends operational lifetime beyond 5 years; 140ms reset hold time accommodates slow LDO startup. |
| Automotive Body Control Module | Dual-Rail FPGA Configuration System |
Use Scenario: Supervises 5.0V system rail and 2.5V CAN transceiver supply in body electronics ECU. IC Role / Device Role / Timing Role: AEC-Q100-qualified supervisor providing fail-safe reset during ignition cycling and load-dump events. Use Value: ±2.5% threshold accuracy over -40°C to +125°C ensures consistent behavior across engine bay temperature extremes. |
Use Scenario: Controls power-up sequencing for FPGA requiring 1.2V core and 3.3V I/O supplies. IC Role / Device Role / Timing Role: Uses RESET IN to monitor 1.2V rail while VCC monitors 3.3V rail - asserts reset if either fails. Use Value: Eliminates need for discrete comparators and timers; single IC satisfies dual-rail sequencing requirements with minimal footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT25D3-T | Same electrical specs but in 6-pin μDFN package (L611+1) instead of 4-pin SC70 (X4+1) | Requires different PCB footprint and land pattern; higher thermal resistance (θJA = 477°C/W) | Select when board layout requires lower profile or improved thermal dissipation via exposed pad |
| TLV809M25DBZR | 2.5V reset threshold, 140ms timeout, but no RESET IN input and only 3-pin SOT-23 package | Lacks auxiliary voltage monitoring capability; limited to single-rail applications | Choose for cost-sensitive, space-constrained designs where dual-supply supervision is unnecessary |
Compared with MAX6388LT25D3-T, the MAX6388XS25D3-T offers identical supervision functionality in a smaller 4-pin SC70 package ideal for dense layouts, while TLV809M25DBZR provides a lower-cost alternative when RESET IN functionality is not required.
Availability
MAX6388XS25D3-T is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered sensor nodes, automotive body control modules, and dual-rail FPGA configuration systems requiring stable component supply and long-term production continuity.
Supply support for MAX6388XS25D3-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.
The MAX6381–MAX6390 family delivers low-power, high-accuracy microprocessor supervisory circuits optimized for battery longevity, wide-temperature operation, and dual-voltage monitoring in space-constrained systems.
FAQ
What is the exact reset threshold voltage of the MAX6388XS25D3-T?
The MAX6388XS25D3-T has a factory-set nominal reset threshold of 2.50V, with guaranteed accuracy of ±2.5% over the full operating temperature range (-40°C to +125°C). This means the actual threshold falls between 2.44V and 2.56V at +25°C, and between 2.44V and 2.56V across the entire temperature range per datasheet specifications.
Does the MAX6388XS25D3-T support monitoring a second voltage rail?
Yes, the MAX6388XS25D3-T includes a dedicated RESET IN pin that connects to an internal +1.27V reference comparator. By applying a resistor divider to this pin, users can configure a custom reset threshold for a second voltage rail - for example, setting a 1.2V core supply monitor while VCC monitors a 3.3V I/O rail.
What is the function of the RESET output on the MAX6388XS25D3-T?
The RESET output of the MAX6388XS25D3-T is an active-high push-pull driver. It asserts high when VCC falls below 2.50V or when the voltage at RESET IN drops below +1.27V, and remains high for a minimum of 140ms after the monitored voltage recovers. This signal directly resets microprocessors without requiring external pullup components.
Is the MAX6388XS25D3-T qualified for automotive applications?
The MAX6388XS25D3-T itself is not explicitly marked as automotive-qualified in its part number suffix, but the MAX6388XS25D3/V+T variant is AEC-Q100 qualified. The base MAX6388XS25D3-T shares identical electrical specifications and operates across -40°C to +125°C, making it suitable for many automotive subsystems where full qualification is not mandated.
What package type does the MAX6388XS25D3-T use?
The MAX6388XS25D3-T uses a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187) with 0.65mm lead pitch. This compact surface-mount package measures 2.0mm × 2.1mm and features a thermal resistance of θJA = 322.6°C/W on a multilayer PCB, supporting high-density board layouts.
MAX6388XS25D3-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:
- 2.5V, 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
MAX6388XS25D3-T FAQ
1.How can I place an order for MAX6388XS25D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS25D3-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 MAX6388XS25D3-T reliable?
The price and inventory of MAX6388XS25D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS25D3-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS25D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS25D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS25D3-T?
MAX6388XS25D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS25D3-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 MAX6388XS25D3-T?
For technical support, including MAX6388XS25D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS25D3-T requirements.
6.How does Aetrix verify that MAX6388XS25D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS25D3-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 MAX6388XS25D3-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS25D3-T?
All MAX6388XS25D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS25D3-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 MAX6388XS25D3-T part is unused and in its original packaging.
Return procedure for MAX6388XS25D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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