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Analog Devices Inc./Maxim Integrated MAX6388XS26D5-T
- Part No.:
- MAX6388XS26D5-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS26D5-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,523
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Product details
Overview
MAX6388XS26D5-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.63V VCC reset threshold (±2.5% over -40°C to +125°C), 280ms 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, targeting power-sensitive embedded systems requiring reliable brownout detection.
For engineers reviewing the MAX6388XS26D5-T datasheet, MAX6388XS26D5-T pinout, MAX6388XS26D5-T application, or MAX6388XS26D5-T equivalent, key selection criteria include its 2.63V reset threshold accuracy, 280ms VCC timeout, 4-pin SC70 package footprint, dual-supply monitoring capability via RESET IN, and guaranteed reset validity down to VCC = 1V.
Technical Context
The MAX6388XS26D5-T integrates a precision voltage comparator for VCC monitoring against a fixed 2.63V threshold and a separate +1.27V reference comparator for the RESET IN pin, enabling independent supervision of two power rails. Its internal timer ensures reset assertion for ≥280ms after VCC or RESET IN recovers above their respective thresholds.
It features an active-high push-pull RESET output that drives high during fault conditions and deasserts low after timeout, eliminating need for external pullup. The device guarantees correct logic state for VCC ≥ 1V and provides immunity to negative-going VCC transients up to 100mV overdrive with duration <10µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.63V nominal, ±2.5% over -40°C to +125°C - ensures accurate brownout detection across automotive/industrial temperature range |
| Reset Timeout Period | 280ms minimum - provides sufficient hold time for microprocessor initialization after power recovery |
| Supply Current | 3μA at +1.8V - enables multi-year battery life in portable equipment |
| Operating Voltage Range | 1.0V to 5.5V - supports operation down to near-dead-battery levels while interfacing with 3.3V/5V logic |
| RESET Output Type | Active-high push-pull - eliminates external pullup resistor and simplifies interface to μP reset inputs |
| Auxiliary Input | RESET IN pin with +1.27V internal reference - allows user-defined second threshold via resistor divider for dual-rail monitoring |
| Reset Validity Range | Guaranteed down to VCC = 1V - ensures deterministic reset behavior during deep undervoltage conditions |
Pinout & Package
MAX6388XS26D5-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm, optimized for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor rail - powers internal circuitry and triggers reset when below 2.63V |
| 2 | RESET | Active-high push-pull output - drives high during reset assertion; sinks current when deasserted low |
| 3 | GND | Ground reference for all internal comparators and output stage - must be low-impedance connection |
| 4 | RESET IN | Auxiliary voltage monitor input - compared to +1.27V internal reference; asserts reset if voltage falls below threshold |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneous monitoring of VCC and external rail via RESET IN enables robust power sequencing in multi-rail systems |
| Low quiescent current | 3μA at 1.8V extends battery life in always-on IoT sensors and wearables without compromising supervision reliability |
| Precision reset threshold | ±2.5% tolerance over full industrial temperature range eliminates need for external calibration in harsh environments |
| Transient immunity | Immunity to sub-10µs negative VCC glitches up to 100mV amplitude prevents spurious resets in electrically noisy applications |
| Guaranteed operation down to 1V | Ensures valid reset signaling even during severe brownout, critical for fail-safe shutdown in safety-critical systems |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Monitoring 3.3V I/O supply and 1.2V core voltage in programmable logic controller modules subject to load dump and cold-crank conditions. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting active-high reset to ARM Cortex-M microcontroller upon either rail collapse, with 280ms hold time ensuring firmware reload completion. Use Value: Prevents corrupted register states during transient undervoltage events, meeting IEC 61000-4-4 EFT immunity requirements. | Use Scenario: Supervising 5V infotainment system supply and 2.5V sensor interface rail in vehicle door modules exposed to battery voltage fluctuations. IC Role / Device Role / Timing Role: Primary reset generator using VCC input and secondary monitoring via RESET IN on isolated sensor domain, with factory-trimmed 2.63V threshold matching MCU VDD tolerance. Use Value: Enables AEC-Q100-compliant power-up sequencing without external resistors or trimming, reducing BOM count by one component. |
| Medical Portable Diagnostic Devices | Smart Energy Meters |
Use Scenario: Battery-powered ultrasound probe requiring guaranteed reset during Li-ion cell discharge from 4.2V to 2.8V and backup coin-cell switchover. IC Role / Device Role / Timing Role: Low-current (3μA) supervisor maintaining reset integrity down to 1V VCC, interfacing directly to ultra-low-power MSP430 MCU reset pin. Use Value: Eliminates need for discrete voltage detector + timer IC, saving 1.2mm² board area and extending single-charge operating time by 8.3%. | Use Scenario: Dual-supply metering SoC with 3.3V analog front-end and 1.8V digital core, subjected to rapid AC line interruptions per IEC 62053-21. IC Role / Device Role / Timing Role: Coordinating reset timing between domains using RESET IN to monitor AFE supply while VCC monitors digital core, ensuring synchronized recovery. Use Value: Prevents partial initialization where ADC starts conversion before digital logic is stable, avoiding erroneous kWh accumulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT26D5-T | Same electrical specs but in 6-pin μDFN package (1.5mm × 2.0mm) instead of 4-pin SC70 - larger footprint, better thermal dissipation | Suitable for higher ambient temperature designs (>105°C) where SC70 thermal resistance (322.6°C/W) may limit reliability | Select when board layout allows larger package and thermal margin is critical; not pin-compatible with MAX6388XS26D5-T |
| TLV803EB26DBVR | 2.63V threshold, 280ms timeout, but active-low open-drain output - requires external pullup resistor and different MCU interface logic | Used in legacy designs where active-low reset is standard; lacks RESET IN pin for dual-rail monitoring | Choose only if redesigning for cost reduction and dual-supply monitoring is unnecessary; requires PCB change for pullup and logic inversion |
Compared with MAX6388LT26D5-T, the MAX6388XS26D5-T offers superior board-area efficiency in compact consumer devices, while TLV803EB26DBVR trades dual-monitoring capability for lower unit cost in single-rail applications where active-low reset is acceptable.
Availability
MAX6388XS26D5-T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, medical portable diagnostic devices, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6388XS26D5-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 medical applications, emphasizing low power, high reliability, and AEC-Q100 qualification.
The MAX6381–MAX6390 family delivers single/dual low-voltage microprocessor reset circuits optimized for battery-powered and safety-critical systems requiring guaranteed reset behavior under brownout, cold-crank, and transient conditions.
FAQ
What is the exact reset threshold voltage of MAX6388XS26D5-T and how stable is it over temperature?
The MAX6388XS26D5-T has a factory-set nominal reset threshold of 2.63V, with guaranteed accuracy of ±2.5% over the full operating temperature range of -40°C to +125°C. This stability is achieved through laser-trimming during production and confirmed by the ±60ppm/°C tempco specification, making it suitable for automotive and industrial applications where voltage reference drift must be minimized.
Does MAX6388XS26D5-T support monitoring of two independent power supplies?
Yes, the MAX6388XS26D5-T supports dual-supply monitoring: VCC is monitored against its fixed 2.63V threshold, while the RESET IN pin compares an external voltage to an internal +1.27V reference. When either input falls below its respective threshold, the active-high RESET output asserts, enabling coordinated reset for multi-rail systems like SoCs with separate core and I/O supplies.
What is the function of the RESET IN pin on MAX6388XS26D5-T and how is its threshold set?
The RESET IN pin on MAX6388XS26D5-T connects to a dedicated comparator referenced to +1.27V. To monitor a custom voltage (e.g., 3.3V), use a resistor divider: R1 from supply to RESET IN, R2 from RESET IN to GND. Calculate R1 = R2 × ((VTH/1.27V) − 1). With ≤50nA input leakage, high-value resistors (e.g., 100kΩ/39kΩ) maintain accuracy without loading the source.
Can MAX6388XS26D5-T operate reliably when VCC drops below 1.8V?
Yes, the MAX6388XS26D5-T guarantees correct reset output logic state down to VCC = 1.0V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. At 1.0V, it maintains active-high reset assertion during undervoltage and transitions cleanly after recovery, enabling fail-safe operation in deep brownout scenarios common in battery-backed systems.
What package type and dimensions does MAX6388XS26D5-T use, and is it RoHS-compliant?
The MAX6388XS26D5-T uses a 4-pin SC70 package (outline 21-0098) measuring 2.0mm × 2.1mm × 0.95mm with gull-wing leads. The "+T" suffix confirms it is lead(Pb)-free and RoHS-compliant. Its thermal resistance is θJA = 322.6°C/W on a multilayer board, making it suitable for compact, thermally constrained designs.
MAX6388XS26D5-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:
- 2.63V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 280ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS26D5-T FAQ
1.How can I place an order for MAX6388XS26D5-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS26D5-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 MAX6388XS26D5-T reliable?
The price and inventory of MAX6388XS26D5-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS26D5-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS26D5-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS26D5-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS26D5-T?
MAX6388XS26D5-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS26D5-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 MAX6388XS26D5-T?
For technical support, including MAX6388XS26D5-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS26D5-T requirements.
6.How does Aetrix verify that MAX6388XS26D5-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS26D5-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 MAX6388XS26D5-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS26D5-T?
All MAX6388XS26D5-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS26D5-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 MAX6388XS26D5-T part is unused and in its original packaging.
Return procedure for MAX6388XS26D5-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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