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Analog Devices Inc./Maxim Integrated MAX6388XS25D6-T
- Part No.:
- MAX6388XS25D6-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS25D6-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,175
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Product details
Overview
MAX6388XS25D6-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), 560ms 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-up/brownout detection in space-constrained battery-powered systems.
For engineers reviewing the MAX6388XS25D6-T datasheet, MAX6388XS25D6-T pinout, MAX6388XS25D6-T application, or MAX6388XS25D6-T equivalent, key selection criteria include its 2.50V reset threshold accuracy, 560ms VCC timeout, dual-supply monitoring capability via RESET IN, and 4-pin SC70 package compatibility with manual-reset–free designs requiring auxiliary voltage supervision.
Technical Context
The MAX6388XS25D6-T integrates a precision bandgap reference and comparator to monitor VCC against a fixed 2.50V threshold while simultaneously comparing an external voltage at RESET IN to a 1.27V internal reference. Its reset assertion logic triggers on either VCC falling below 2.50V or RESET IN falling below 1.27V, with independent timing control ensuring deterministic behavior during power transients.
It features a dedicated high-impedance RESET IN terminal with ≤50nA leakage, enabling accurate resistor-divider–based threshold setting for secondary supplies, and guarantees valid reset output state down to VCC = 1.0V - critical for ultra-low-voltage brownout recovery in modern embedded controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.50V ±2.5% (–40°C to +125°C); ensures stable reset activation across automotive/industrial temperature ranges |
| Reset Timeout Period | 560ms min; provides sufficient hold time for μP initialization after power stabilization |
| RESET Output Type | Active-high push-pull; eliminates need for external pullup and supports direct connection to μP reset inputs |
| RESET IN Threshold | 1.27V ±2.5% (–40°C to +125°C); enables precise secondary supply monitoring via external resistor divider |
| Supply Current | 3μA at VCC = 1.8V; extends battery life in portable equipment without sacrificing supervision accuracy |
| Operating Voltage Range | 1.0V to 5.5V; supports operation during deep brownout and compatibility with core/I/O rail voltages |
| Reset Propagation Delay | 4.5μs (RESET IN to RESET); ensures rapid response to auxiliary supply faults |
Pinout & Package
MAX6388XS25D6-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm, optimized for high-density PCB layouts in portable and automotive electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor source; powers internal circuitry and sets reset threshold reference point |
| 2 | RESET | Active-high push-pull output; drives high during reset assertion and low otherwise; compatible with standard μP reset inputs |
| 3 | GND | Analog/digital ground reference; must be connected to system ground plane for accurate threshold comparison |
| 4 | RESET IN | Auxiliary voltage monitor input; high-impedance node compared to 1.27V internal reference; enables dual-rail supervision |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply monitoring capability | Simultaneous VCC and RESET IN supervision ensures robust fault detection in multi-rail systems like SoC platforms with separate core/I/O supplies |
| Factory-trimmed 2.50V reset threshold | Eliminates external component count and calibration effort while maintaining ±2.5% accuracy over full industrial temperature range |
| 560ms guaranteed reset timeout | Meets μP reset hold-time requirements for complex boot sequences without external timing components |
| 1.27V internal reference for RESET IN | Enables accurate, temperature-stable secondary threshold setting using only two external resistors |
| Valid reset output down to VCC = 1.0V | Ensures deterministic reset behavior during deep undervoltage conditions where many supervisors fail |
Applications
| Power-Supply Sequencing in Dual-Rail SoCs | Battery-Powered Medical Sensors |
|---|---|
Use Scenario: Monitoring both core (1.2V) and I/O (3.3V) rails in an ARM-based SoC to enforce correct power-up order and detect individual rail failures. IC Role / Device Role / Timing Role: MAX6388XS25D6-T supervises VCC (3.3V) and uses RESET IN to monitor core rail via resistor divider; asserts active-high RESET until both rails stabilize. Use Value: Prevents illegal state entry during asymmetric power sequencing and eliminates need for discrete comparators or FPGA-based supervision logic. | Use Scenario: Ensuring reliable startup and brownout recovery in a wearable ECG sensor powered by a single 3.0V coin cell with tight voltage tolerance. IC Role / Device Role / Timing Role: MAX6388XS25D6-T monitors VCC directly at 2.50V threshold and asserts RESET for 560ms to guarantee MCU initialization completes before analog front-end activation. Use Value: Extends usable battery life by operating down to 1.0V supply while maintaining reset integrity - critical for long-term unattended deployment. |
| Automotive Body Control Modules | Industrial PLC I/O Expansion Cards |
Use Scenario: Supervising 5V main supply and 3.3V CAN transceiver rail in a BCM to prevent communication lockup during load-dump transients. IC Role / Device Role / Timing Role: MAX6388XS25D6-T uses VCC for main rail and RESET IN for transceiver rail; triggers reset on either fault with immunity to <350ns negative VCC glitches. Use Value: Meets AEC-Q100 requirements for reset reliability under harsh electrical environments without adding transient suppression components. | Use Scenario: Adding fault-tolerant power monitoring to modular I/O cards that accept multiple input voltages (12V, 24V, 48V) and generate local 3.3V/5V rails. IC Role / Device Role / Timing Role: MAX6388XS25D6-T monitors local 3.3V rail (VCC) and feeds back isolated 5V rail status via RESET IN; provides unified reset signal to host controller. Use Value: Enables centralized health reporting across heterogeneous power domains while occupying minimal board area in compact card-edge connectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6387XS25D6-T | Same 2.50V threshold, 560ms timeout, and RESET IN input, but features open-drain active-low RESET output requiring external pullup | Suitable when system requires active-low reset signaling or level translation to higher-voltage logic | Select MAX6387XS25D6-T only if active-low assertion and external pullup are acceptable; otherwise MAX6388XS25D6-T provides simpler interface |
| TLV803EB25DBZR | 2.5V threshold, 200ms timeout, no RESET IN; SOT-23-3 package; ±1.5% threshold accuracy; 0.5μA typical ICC | Targeted at cost-sensitive, single-rail applications where auxiliary monitoring is unnecessary and shorter timeout suffices | Choose TLV803EB25DBZR for minimal footprint and ultra-low current in basic reset-only use cases; MAX6388XS25D6-T adds dual-rail capability and longer timeout |
Compared with MAX6387XS25D6-T, MAX6388XS25D6-T simplifies system design by eliminating the external pullup resistor and supporting direct μP reset input connection; versus TLV803EB25DBZR, it delivers extended supervision functionality (dual-rail monitoring, longer timeout) at the cost of slightly higher quiescent current and larger package.
Availability
MAX6388XS25D6-T is available at Aetrix Electronics and suitable for battery-powered medical sensors, automotive body control modules, industrial PLC I/O expansion cards, and dual-rail SoC power sequencing requiring stable component supply and AEC-Q100–qualified performance.
Supply support for MAX6388XS25D6-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 communications applications.
The MAX6381–MAX6390 family delivers low-power, high-accuracy μP supervisory circuits targeting space-constrained and battery-operated systems requiring dual-voltage monitoring and guaranteed reset behavior across extreme temperatures.
FAQ
What is the exact reset threshold voltage of MAX6388XS25D6-T and how stable is it over temperature?
The MAX6388XS25D6-T has a factory-set VCC reset threshold of 2.50V, specified with ±2.5% accuracy over the full –40°C to +125°C operating range. This stability is achieved through laser-trimmed internal resistors and a precision bandgap reference, ensuring consistent brownout detection without external calibration. The MAX6388XS25D6-T maintains this accuracy even under fast VCC transients, making it suitable for automotive and industrial environments.
Does MAX6388XS25D6-T support monitoring a second voltage, and how is it implemented?
Yes, MAX6388XS25D6-T supports dual-voltage monitoring via its dedicated RESET IN pin, which compares an external voltage to a stable 1.27V internal reference. To set a custom threshold, connect a resistor divider between the secondary supply and ground, with the midpoint fed to RESET IN. The MAX6388XS25D6-T asserts reset if either VCC falls below 2.50V or the voltage at RESET IN drops below 1.27V - enabling coordinated supervision of core and I/O rails in SoC designs.
What is the reset output configuration of MAX6388XS25D6-T and what are its drive capabilities?
The MAX6388XS25D6-T features an active-high push-pull RESET output capable of sourcing up to 800µA at VCC ≥ 4.5V and sinking up to 3.2mA when asserted. Its VOH remains ≥ 0.8 × VCC and VOL stays ≤ 0.4V across the full 1.0V–5.5V supply range, ensuring compatibility with standard CMOS and TTL reset inputs. Unlike open-drain alternatives, the MAX6388XS25D6-T requires no external pullup resistor, simplifying layout and reducing BOM count.
How does MAX6388XS25D6-T handle power supply transients, and what protection does it offer?
The MAX6388XS25D6-T provides inherent immunity to short-duration negative-going VCC transients (glitches), tolerating pulses up to ~350ns wide when the overdrive is 100mV below the 2.50V threshold. This is achieved through internal filtering and comparator hysteresis. For enhanced robustness, placing a 0.1µF ceramic capacitor close to the VCC pin further suppresses high-frequency noise - a design practice validated in Maxim's application notes for MAX6388XS25D6-T in automotive and industrial settings.
Is MAX6388XS25D6-T qualified for automotive applications, and what packaging options are available?
Yes, MAX6388XS25D6-T is offered in an AEC-Q100 qualified version denoted by the "/V" suffix in ordering codes (e.g., MAX6388XS25D6/V+T). The standard MAX6388XS25D6-T uses a lead-free, RoHS-compliant 4-pin SC70 package (2.0mm × 2.1mm), optimized for thermal performance and high-density placement. It is not available in 3-pin or 6-pin variants - the 4-pin SC70 is the only package for this specific reset threshold and timeout combination.
MAX6388XS25D6-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:
- 560ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS25D6-T FAQ
1.How can I place an order for MAX6388XS25D6-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS25D6-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 MAX6388XS25D6-T reliable?
The price and inventory of MAX6388XS25D6-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS25D6-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS25D6-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS25D6-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS25D6-T?
MAX6388XS25D6-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS25D6-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 MAX6388XS25D6-T?
For technical support, including MAX6388XS25D6-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS25D6-T requirements.
6.How does Aetrix verify that MAX6388XS25D6-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS25D6-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 MAX6388XS25D6-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS25D6-T?
All MAX6388XS25D6-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS25D6-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 MAX6388XS25D6-T part is unused and in its original packaging.
Return procedure for MAX6388XS25D6-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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