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Analog Devices Inc./Maxim Integrated MAX6388XS24D4-T
- Part No.:
- MAX6388XS24D4-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS24D4-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,710
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Product details
Overview
MAX6388XS24D4-T from Maxim Integrated is a low-power, dual-voltage microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.40V VCC reset threshold (±2.5% over -40°C to +125°C), 1120ms minimum VCC reset timeout, and auxiliary RESET IN input for monitoring a second voltage source. 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 MAX6388XS24D4-T datasheet, MAX6388XS24D4-T pinout, MAX6388XS24D4-T application, or MAX6388XS24D4-T equivalent, key selection criteria include its 2.40V reset threshold accuracy, dual-monitoring capability via RESET IN, guaranteed reset validity down to VCC = 1V, and compatibility with 4-pin SC70 layouts requiring minimal PCB real estate.
Technical Context
The MAX6388XS24D4-T integrates two independent voltage comparators: one monitors VCC against a precision 2.40V internal reference, while the other compares an external voltage applied to RESET IN against a fixed 1.27V internal reference. Reset asserts when either monitored voltage falls below its respective threshold.
An internal timer enforces a guaranteed minimum 1120ms reset assertion period after VCC recovers above 2.40V, and the device guarantees correct logic state of the active-high push-pull RESET output down to VCC = 1V - critical for deterministic system initialization during deep brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.40V ±2.5% (–40°C to +125°C); ensures accurate power-fail detection across automotive/industrial temperature range |
| RESET Timeout (VCC) | 1120ms min; provides sufficient hold time for μP core and peripherals to stabilize after power recovery |
| 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 rails without level shifting |
| RESET Output Type | Active-high push-pull; eliminates need for external pullup resistor and drives high-impedance μP reset inputs directly |
| RESET IN Threshold | 1.27V ±2.5% (–40°C to +125°C); allows precise secondary voltage monitoring using external resistor divider |
| Reset Assertion Validity | Guaranteed down to VCC = 1V; ensures deterministic reset behavior during severe undervoltage events |
Pinout & Package
MAX6388XS24D4-T is packaged in a RoHS-compliant 4-pin SC70 (package code X4+1) with 0.65mm pitch, footprint compatible with land pattern 90-0187.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor rail; powers internal circuitry and sets comparator reference point |
| 2 | RESET | Active-high push-pull output; drives high on valid power, low during reset; sinks/source current per spec without external components |
| 3 | GND | Analog/digital ground reference; must be connected to system ground plane for accurate threshold sensing |
| 4 | RESET IN | Auxiliary voltage monitor input; high-impedance node compared to 1.27V reference; used to detect failure of secondary supply (e.g., I/O rail) |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises main VCC and secondary supply (via RESET IN), enabling robust dual-rail fault detection in SoC or FPGA systems |
| Factory-trimmed 2.40V reset threshold | Eliminates external resistor networks and calibration effort; ±2.5% tolerance over full industrial temperature range ensures design margin |
| 1120ms minimum reset timeout | Meets JEDEC JESD84-B51 requirements for NAND flash boot stability and prevents premature release during slow-ramping supplies |
| Guaranteed operation down to VCC = 1V | Ensures reset signal remains logically valid during deep brownout, avoiding undefined μP states before complete power collapse |
| Low 3μA quiescent current at 1.8V | Extends battery life in portable medical devices and wireless sensor nodes where duty-cycled wake-up dominates power budget |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors both 3.3V microcontroller core rail and 5V I/O rail in programmable logic controllers exposed to wide ambient temperatures. IC Role / Device Role / Timing Role: Dual-supply supervisor providing synchronized reset assertion when either rail drops below safe operating level. Use Value: Prevents firmware corruption during transient line dips by enforcing 1120ms reset hold time and validating reset logic down to 1V VCC. | Use Scenario: Supervises 12V-to-5V DC-DC converter output and 5V-to-3.3V LDO output in automotive body electronics modules. IC Role / Device Role / Timing Role: Resets MCU and peripheral ICs only when both regulated rails are stable, eliminating false triggers from isolated transients. Use Value: Auxiliary RESET IN input enables precise 5V rail monitoring using resistor divider, while AEC-Q100 qualified version ensures reliability in under-hood environments. |
| Medical Wearable Sensor Hub | IoT Edge Node with Dual Power Sources |
Use Scenario: Powers ultra-low-power ARM Cortex-M0+ MCU and analog front-end from coin cell and energy-harvesting capacitor in continuous glucose monitors. IC Role / Device Role / Timing Role: Detects brownout on primary battery rail and secondary harvested rail, asserting reset until both recover and remain stable for ≥1120ms. Use Value: 3μA supply current extends operational lifetime; guaranteed reset validity to 1V avoids spurious resets during capacitor discharge cycles. | Use Scenario: Manages power sequencing between USB bus-powered 5V and backup Li-ion battery (3.7V nominal) in smart home gateways. IC Role / Device Role / Timing Role: Uses RESET IN to monitor battery voltage divider while VCC tracks USB rail, ensuring clean reset during power-source handover. Use Value: Factory-set 2.40V threshold matches common battery undervoltage cutoff; 4-pin SC70 package minimizes footprint in dense layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT24D4-T | Same electrical specs but in 6-pin μDFN (L611+1) instead of 4-pin SC70; higher thermal resistance (θJA = 477°C/W vs. 322.6°C/W) | Preferred for thermally demanding applications with PCB space for larger package; not pin-compatible with SC70 layout | Select when board layout allows μDFN and thermal performance requires lower junction temperature rise |
| TPS3808G33DBVR | TI part with 3.3V reset threshold (not 2.40V); 200ms timeout (not 1120ms); no RESET IN input; 1.8V–6.5V operating range | Suitable for single-rail 3.3V systems without auxiliary monitoring needs; lacks dual-voltage supervision capability | Choose only if 3.3V threshold and shorter timeout meet system requirements and RESET IN functionality is unnecessary |
Compared with MAX6388LT24D4-T, the MAX6388XS24D4-T offers smaller PCB footprint and better thermal performance in SC70, while TPS3808G33DBVR provides alternate vendor sourcing but sacrifices dual-monitoring and long-reset-timing capabilities essential for safety-critical brownout recovery.
Availability
MAX6388XS24D4-T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical wearable sensor hubs, and IoT edge nodes requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6388XS24D4-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 industrial, automotive, and computing applications.
The MAX6381–MAX6390 family delivers ultra-low-power, factory-trimmed supervisory circuits optimized for reliable power-on reset, brownout protection, and dual-rail monitoring in space- and energy-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of MAX6388XS24D4-T and how stable is it over temperature?
The MAX6388XS24D4-T has a factory-set VCC reset threshold of 2.40V with ±2.5% accuracy over the full –40°C to +125°C operating temperature range. This stability is achieved through laser-trimmed internal references and BiCMOS process design, ensuring consistent brownout detection without external calibration across automotive and industrial environments. The MAX6388XS24D4-T maintains this tolerance without drift or hysteresis degradation over lifetime.
Does MAX6388XS24D4-T support monitoring of a second voltage rail, and how is it implemented?
Yes, the MAX6388XS24D4-T includes a dedicated RESET IN pin that compares an external voltage to a precision 1.27V internal reference. To monitor a second rail (e.g., 5V or 3.3V), connect a resistor divider from that rail to RESET IN so the divided voltage equals 1.27V at the desired trip point. The MAX6388XS24D4-T asserts reset if either VCC < 2.40V or RESET IN < 1.27V, enabling true dual-supply fault detection without additional ICs.
What is the reset timeout duration for MAX6388XS24D4-T, and is it configurable?
The MAX6388XS24D4-T provides a fixed minimum reset timeout of 1120ms after VCC rises above 2.40V. This value is factory-programmed and non-configurable - it is encoded in the "D4" suffix of the part number per Maxim's ordering guide. The timeout is guaranteed over temperature and supply voltage, eliminating timing uncertainty in critical boot sequences. No external capacitors or resistors are required to set or adjust the MAX6388XS24D4-T timeout.
Can MAX6388XS24D4-T operate reliably at very low supply voltages, and what is the minimum functional VCC?
Yes, the MAX6388XS24D4-T guarantees correct logic state of its active-high push-pull RESET output down to VCC = 1.0V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. This ensures deterministic reset behavior during deep brownout events where supply collapses gradually. Below 1.0V, the device ceases operation, but the MAX6388XS24D4-T has already asserted reset and held it valid throughout the critical sub-1.8V region where most MCUs lose internal state integrity.
Is MAX6388XS24D4-T pin-compatible with legacy Maxim reset ICs like MAX809 or MAX6326?
No, the MAX6388XS24D4-T is not pin-compatible with MAX809/MAX6326 series. While the datasheet notes functional similarity and cross-reference capability, the MAX6388XS24D4-T uses a 4-pin SC70 package with pinout VCC–RESET–GND–RESET IN, whereas MAX809 (3-pin SOT23) and MAX6326 (4-pin SOT143) have different pin assignments and lack the RESET IN function. Migration requires PCB layout revision to accommodate the MAX6388XS24D4-T's dedicated auxiliary input.
MAX6388XS24D4-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:
- 2.4V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 1.12s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS24D4-T FAQ
1.How can I place an order for MAX6388XS24D4-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS24D4-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 MAX6388XS24D4-T reliable?
The price and inventory of MAX6388XS24D4-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS24D4-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS24D4-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS24D4-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS24D4-T?
MAX6388XS24D4-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS24D4-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 MAX6388XS24D4-T?
For technical support, including MAX6388XS24D4-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS24D4-T requirements.
6.How does Aetrix verify that MAX6388XS24D4-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS24D4-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 MAX6388XS24D4-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS24D4-T?
All MAX6388XS24D4-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS24D4-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 MAX6388XS24D4-T part is unused and in its original packaging.
Return procedure for MAX6388XS24D4-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6388XS24D4-T Tags
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MIC826SYMT-TR
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