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Analog Devices Inc./Maxim Integrated MAX6388XS25D7-T
- Part No.:
- MAX6388XS25D7-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS25D7-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,559
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Product details
Overview
MAX6388XS25D7-T from Maxim Integrated is a low-power 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), 1200ms 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 MAX6388XS25D7-T datasheet, MAX6388XS25D7-T pinout, MAX6388XS25D7-T application, or MAX6388XS25D7-T equivalent, key selection criteria include its 2.50V reset threshold accuracy, 1200ms timeout, 4-pin SC70 package, auxiliary voltage monitoring capability, and guaranteed reset validity down to VCC = 1V.
Technical Context
The MAX6388XS25D7-T integrates a precision bandgap reference and comparator to monitor VCC against a fixed 2.50V threshold, while a separate internal 1.27V reference compares the external RESET IN pin voltage. Reset assertion occurs if either VCC < 2.50V or RESET IN < 1.27V, with independent timing control ensuring 1200ms minimum deassertion delay after recovery.
Its 4-pin SC70 package contains VCC, GND, RESET (active-high push-pull), and RESET IN terminals - omitting MR (manual reset) found in MAX6384–MAX6386/MAX6390, and excluding NC pins present in 6-pin μDFN variants. The device guarantees correct logic state of RESET output down to VCC = 1V, enabling robust operation during deep brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.50V ±2.5% over -40°C to +125°C - ensures consistent brownout detection across automotive/industrial temperature range |
| Reset Timeout Period | 1200ms min - provides sufficient hold time for microprocessor initialization after power recovery |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup resistor and supports direct interface to CMOS/TTL inputs |
| Auxiliary Input | RESET IN with 1.27V threshold - enables monitoring of second supply rail (e.g., I/O voltage) via external resistor divider |
| Supply Current | 3μA at VCC = 1.8V - minimizes quiescent load in battery-powered or energy-harvesting applications |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion even during severe undervoltage conditions |
| Reset Propagation Delay | 4.5µs max (RESET IN to RESET) - ensures fast response to secondary supply faults |
Pinout & Package
MAX6388XS25D7-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 | Primary supply input | Monitored voltage source; powers internal circuitry and sets operating point for reset comparator |
| 2 - RESET | Active-high push-pull output | Drives high during normal operation; asserts low only during reset condition - directly interfaces to µP /RESET pin without external components |
| 3 - GND | Ground reference | Common return path for all internal current paths and comparator references |
| 4 - RESET IN | Auxiliary voltage monitor input | High-impedance node compared to internal 1.27V reference; used with external resistor divider to set custom secondary reset threshold |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply monitoring capability | Simultaneous VCC and RESET IN monitoring enables coordinated reset for core/I/O rail sequencing in dual-voltage systems |
| Factory-trimmed reset threshold | 2.50V ±2.5% tolerance eliminates need for external calibration or trimming components |
| Negative-going VCC transient immunity | Withstands short-duration supply glitches without false triggering - validated up to 150µs at 100mV overdrive |
| Guaranteed operation down to VCC = 1V | Ensures deterministic reset behavior during deep brownout, critical for fail-safe system recovery |
| Low-temperature coefficient | 60ppm/°C reset threshold drift - maintains accuracy across wide industrial temperature range (-40°C to +125°C) |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors 2.5V core supply and 3.3V I/O rail in a CAN-connected controller subjected to engine cranking transients. IC Role / Device Role / Timing Role: Dual-threshold supervisor asserting reset when either rail drops below specification, with 1200ms timeout ensuring full MCU reinitialization after voltage recovery. Use Value: Prevents erratic firmware execution during cold-crank undervoltage events by enforcing minimum reset hold time aligned with processor boot requirements. | Use Scenario: Embedded in a door module with separate 1.8V sensor interface and 5.0V actuator supply, exposed to load-dump and jump-start conditions. IC Role / Device Role / Timing Role: Uses RESET IN to monitor 1.8V rail via resistor divider while VCC monitors 5.0V; asserts active-high RESET to wake microcontroller from sleep on fault detection. Use Value: Enables single-chip supervision of heterogeneous supply domains, reducing BOM count versus discrete solutions while maintaining AEC-Q100 compliance. |
| Medical Portable Diagnostic Device | Battery-Powered IoT Sensor Node |
Use Scenario: Powers ARM Cortex-M0+ MCU and analog front-end from Li-ion battery with LDO regulation; must detect end-of-life voltage sag before data corruption. IC Role / Device Role / Timing Role: Configured with 2.50V VCC threshold to trigger reset as battery discharges below safe operating level, using 1200ms timeout to allow complete shutdown sequence. Use Value: Provides deterministic low-battery shutdown without software intervention, preserving flash memory integrity and preventing partial writes during power collapse. | Use Scenario: Supervises ultra-low-power nRF52840 SoC and environmental sensors powered by coin cell; requires sub-μA quiescent current and dual-rail awareness. IC Role / Device Role / Timing Role: Monitors main 3.0V supply and backup 1.8V RTC domain via RESET IN; leverages 3μA supply current to extend battery life beyond 5 years. Use Value: Delivers dual-supply supervision within same footprint and current budget as single-rail alternatives, eliminating need for second supervisor IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT25D7-T | Same electrical specs but in 6-pin μDFN package (L611+1); includes NC pins not present in SC70 variant | Requires different PCB footprint and land pattern (90-0080 vs. 90-0187); higher thermal resistance (θJA = 477°C/W) | Select when board layout accommodates larger package or when μDFN thermal performance is preferred despite size penalty |
| TPS3808G33DBVR | 2.93V reset threshold (not 2.50V); 200ms default timeout (adjustable via capacitor); no auxiliary RESET IN input | Lacks dual-supply monitoring capability; requires external timing capacitor; incompatible pinout and reset polarity (active-low) | Choose only if 2.93V threshold aligns with system requirements and auxiliary monitoring is unnecessary |
Compared with MAX6388LT25D7-T, the MAX6388XS25D7-T offers identical supervision functionality in a 35% smaller footprint, while the TPS3808G33DBVR lacks RESET IN capability and requires design changes to accommodate different threshold, timeout method, and output polarity - making MAX6388XS25D7-T the optimal choice for compact dual-rail systems needing factory-set 2.50V detection.
Availability
MAX6388XS25D7-T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical portable diagnostic devices, and battery-powered IoT sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6388XS25D7-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, high-accuracy reset supervision for microprocessor-based systems where reliability under brownout, transient, and dual-rail conditions is critical.
FAQ
What is the exact reset threshold voltage of MAX6388XS25D7-T and how accurate is it over temperature?
The MAX6388XS25D7-T has a factory-set VCC reset threshold of 2.50V, with guaranteed accuracy of ±2.5% over the full operating temperature range of -40°C to +125°C. This specification is confirmed in the Electrical Characteristics table of the official datasheet, and the device uses laser-trimmed internal references to achieve this stability without external components.
Does MAX6388XS25D7-T support monitoring of a second voltage rail, and how is it implemented?
Yes, MAX6388XS25D7-T supports dual-voltage monitoring via its dedicated RESET IN pin, which compares an external voltage to an internal 1.27V reference. To monitor a second rail (e.g., 3.3V), connect a resistor divider between that rail and ground, with the midpoint fed to RESET IN - the threshold is set using R1 = R2 × ((VINTH/1.27V) − 1), as specified in the MAX6388XS25D7-T datasheet.
What is the function and electrical behavior of the RESET output on MAX6388XS25D7-T?
The RESET output of MAX6388XS25D7-T is an active-high push-pull driver. During normal operation (VCC ≥ 2.50V and RESET IN ≥ 1.27V), it drives high (VOH ≥ 0.8×VCC). When either monitored voltage falls below its threshold, RESET immediately pulls low and remains low for the full 1200ms timeout period after recovery - guaranteeing valid logic levels down to VCC = 1V per the MAX6388XS25D7-T datasheet.
Is MAX6388XS25D7-T compatible with manual reset functionality, and what are the implications if MR is required?
No, MAX6388XS25D7-T does not include a manual reset (MR) input - this feature is present only in MAX6384/MAX6385/MAX6386/MAX6390 variants. If system-level manual reset is required, the MAX6388XS25D7-T cannot fulfill that function; alternative parts such as MAX6385XS25D7-T (same threshold/timing, added MR pin) must be selected, as confirmed by the Selector Guide and Pin Configurations in the MAX6388XS25D7-T documentation.
What package type and dimensions does MAX6388XS25D7-T use, and are there thermal considerations?
MAX6388XS25D7-T uses a 4-pin SC70 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm with a 0.65mm pin pitch. Its thermal resistance is θJA = 322.6°C/W on a multilayer board. This package enables high-density placement but requires attention to local copper area and airflow in thermally constrained environments, as detailed in the Package Information section of the MAX6388XS25D7-T datasheet.
MAX6388XS25D7-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:
- 1.2s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS25D7-T FAQ
1.How can I place an order for MAX6388XS25D7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS25D7-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 MAX6388XS25D7-T reliable?
The price and inventory of MAX6388XS25D7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS25D7-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS25D7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS25D7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS25D7-T?
MAX6388XS25D7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS25D7-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 MAX6388XS25D7-T?
For technical support, including MAX6388XS25D7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS25D7-T requirements.
6.How does Aetrix verify that MAX6388XS25D7-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS25D7-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 MAX6388XS25D7-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS25D7-T?
All MAX6388XS25D7-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS25D7-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 MAX6388XS25D7-T part is unused and in its original packaging.
Return procedure for MAX6388XS25D7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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