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Analog Devices Inc./Maxim Integrated MAX6388XS26D4-T
- Part No.:
- MAX6388XS26D4-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS26D4-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,501
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Product details
Overview
MAX6388XS26D4-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), 1120ms minimum VCC reset timeout, and auxiliary RESET IN input for dual-voltage monitoring. It consumes only 3μA at +1.8V and guarantees valid reset state down to VCC = 1V, used in battery-powered controllers and dual-rail embedded systems.
For engineers reviewing the MAX6388XS26D4-T datasheet, MAX6388XS26D4-T pinout, MAX6388XS26D4-T application, or MAX6388XS26D4-T equivalent, key selection criteria include its 2.63V threshold accuracy, 1120ms VCC timeout, 4-pin SC70 package, RESET IN compatibility with external resistor dividers, and automotive-grade AEC-Q100 qualification.
Technical Context
The MAX6388XS26D4-T integrates a precision bandgap reference and comparator to monitor VCC against a fixed 2.63V threshold while simultaneously accepting an auxiliary voltage via RESET IN, which is compared to an internal 1.27V reference. Its reset assertion logic triggers on either VCC falling below 2.63V or RESET IN falling below its derived threshold.
An internal timer enforces a guaranteed minimum 1120ms reset timeout after VCC recovery, and the active-high push-pull output drives high during reset with VOH ≥ 0.8×VCC (ISOURCE = 500µA at VCC ≥ 2.5V) and VOL ≤ 0.3V (ISINK = 1.2mA). The device operates across -40°C to +125°C with ±2.5% threshold stability and 60ppm/°C tempco.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.63V nominal, ±2.5% over -40°C to +125°C - ensures reliable brownout detection across automotive temperature range |
| VCC Reset Timeout | 1120ms minimum - provides sufficient hold time for complex μP initialization sequences |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup and supports direct connection to μP reset inputs |
| Auxiliary Input | RESET IN with 1.27V internal reference - allows user-defined second-voltage monitoring via resistor divider |
| Operating Temp Range | -40°C to +125°C - qualified for under-hood automotive and industrial control applications |
| Package | 4-pin SC70 (X4+1 outline) - 1.2mm × 1.6mm footprint ideal for space-constrained portable designs |
Pinout & Package
MAX6388XS26D4-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), featuring exposed pad for thermal enhancement and optimized for high-density PCB layouts.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor - must be decoupled with 0.1μF capacitor near pin for transient immunity |
| 2 | RESET | Active-high push-pull reset output - asserts high during fault condition and remains high for full 1120ms timeout |
| 3 | GND | Ground reference for all internal circuits and reset comparator - requires low-impedance connection to system ground plane |
| 4 | RESET IN | Auxiliary voltage monitor input - accepts externally divided voltage; reset triggers if input falls below 1.27V reference |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneous monitoring of VCC and external rail via RESET IN enables robust power sequencing in dual-supply SoC systems |
| Low-power operation | 3μA supply current at 1.8V extends battery life in portable medical monitors and wireless sensor nodes |
| Negative-going transient immunity | Withstands VCC glitches up to 35µs duration at 100mV overdrive - reduces false resets in electrically noisy environments |
| Reset validity down to 1V | Guaranteed correct logic state at VCC = 1V - supports graceful shutdown in deep brownout conditions |
| AEC-Q100 qualified | Automotive-grade reliability validated per stress test requirements - suitable for ADAS and body control modules |
Applications
| Battery-Powered Controllers | Dual-Rail Industrial PLCs |
|---|---|
Use Scenario: Remote HVAC controller powered by CR2032 coin cell with 3.3V I/O and 1.8V core rails. IC Role / Device Role / Timing Role: Supervises both rails using VCC (3.3V) and RESET IN (1.8V via divider), asserting reset if either drops below threshold. Use Value: Prevents firmware corruption during battery depletion while consuming only 3μA - enabling >5-year shelf life. | Use Scenario: Programmable logic controller with separate 24V field power and 5V logic supply. IC Role / Device Role / Timing Role: Monitors 5V logic rail directly and 24V field rail via resistor divider on RESET IN to detect field-side undervoltage. Use Value: Ensures deterministic restart after field power interruption without requiring secondary supervisor IC. |
| Automotive Body Electronics | Medical Sensor Nodes |
Use Scenario: Door module with LIN transceiver and microcontroller operating from vehicle battery (9V–16V) regulated to 5V and 3.3V. IC Role / Device Role / Timing Role: Uses VCC = 5V and RESET IN configured for 3.3V rail to coordinate reset timing across domains during cold-crank events. Use Value: AEC-Q100 qualification and -40°C to +125°C operation ensure reliability in under-dash mounting locations. | Use Scenario: Wearable ECG patch with ultra-low-power MCU and analog front-end powered by single Li-ion cell. IC Role / Device Role / Timing Role: Supervises main 3.3V supply and backup 1.8V reference rail; 1120ms timeout accommodates slow analog settling. Use Value: 3μA quiescent current minimizes self-discharge, extending operational runtime between charges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT26D4-T | Same electrical specs but in 6-pin μDFN (L611+1) instead of 4-pin SC70 - larger footprint, better thermal performance (θJA = 477°C/W vs. 322.6°C/W) | Preferred for high-reliability industrial designs where board space permits and thermal margin is critical | Select when μDFN's lower thermal resistance justifies added PCB area and assembly complexity |
| TLV809E26DBZR | TI part with same 2.63V threshold and 1120ms timeout, but no RESET IN input and only active-low open-drain output - requires external pullup | Suitable for simple single-rail systems without auxiliary monitoring needs | Choose only if dual-voltage supervision is unnecessary and board layout already includes pullup resistor |
Compared with MAX6388LT26D4-T, the MAX6388XS26D4-T saves 0.8mm² board area and simplifies layout with its smaller SC70 package, while TLV809E26DBZR lacks RESET IN functionality and demands additional passive components - making MAX6388XS26D4-T optimal for compact dual-rail designs requiring minimal BOM count.
Availability
MAX6388XS26D4-T is available at Aetrix Electronics and suitable for battery-powered controllers, automotive body electronics, dual-rail industrial PLCs, and medical sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6388XS26D4-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, emphasizing low power, high reliability, and small form factors.
The MAX6381–MAX6390 family delivers single/dual low-voltage μP reset supervision with sub-μA quiescent current and AEC-Q100 options - engineered specifically for space- and power-constrained embedded systems requiring deterministic power-on reset behavior.
FAQ
What is the exact reset threshold voltage of the MAX6388XS26D4-T and how stable is it over temperature?
The MAX6388XS26D4-T has a factory-set nominal VCC reset threshold of 2.63V, with guaranteed accuracy of ±2.5% over the full operating temperature range of -40°C to +125°C. Its temperature coefficient is 60ppm/°C, meaning the threshold drifts less than 0.016V across the entire range - ensuring consistent brownout detection in automotive and industrial environments where ambient temperature varies widely. This specification is confirmed in the Electrical Characteristics table of the official datasheet.
Does the MAX6388XS26D4-T support monitoring of a second voltage rail, and how is it implemented?
Yes, the MAX6388XS26D4-T supports dual-voltage supervision via its dedicated RESET IN pin, which compares an external voltage to an internal 1.27V reference. To monitor a second rail, connect a resistor divider between that rail and GND, with the midpoint fed to RESET IN. The threshold is set using R1 = R2 × ((VINTH/1.27V) − 1), where VINTH is the desired trip point. This feature is explicitly documented in the Pin Description and Applications Information sections for MAX6387/MAX6388/MAX6389 variants.
What is the function of the RESET output on the MAX6388XS26D4-T, and what are its drive capabilities?
The RESET output of the MAX6388XS26D4-T is an active-high push-pull driver that asserts high during reset conditions and deasserts low afterward. It sources ≥0.8×VCC at 500µA (for VCC ≥ 2.5V) and sinks ≤0.3V at 1.2mA, eliminating the need for external pullup resistors. This configuration ensures fast, clean transitions compatible with standard μP reset inputs and is confirmed in the Electrical Characteristics table under "Push-Pull RESET Output Voltage".
Is the MAX6388XS26D4-T qualified for automotive applications, and what does the "/V" suffix indicate?
The MAX6388XS26D4-T itself does not carry the "/V" suffix and is not automotive-qualified; however, the MAX6388XS26D4/V+T variant is AEC-Q100 qualified. The "/V" denotes automotive qualification per the Ordering Information table, and the "+T" indicates lead-free/RoHS compliance. While MAX6388XS26D4-T shares identical electrical specs, only the "/V" version undergoes automotive stress testing - critical for under-hood or safety-related modules.
What package type and dimensions does the MAX6388XS26D4-T use, and where can I find the land pattern?
The MAX6388XS26D4-T uses a 4-pin SC70 package (outline number 21-0098, package code X4+1), measuring 1.2mm × 1.6mm with 0.65mm pitch. Its land pattern number is 90-0187, and full mechanical drawings are available at maximintegrated.com/packages. This compact footprint is verified in the Package Information section and Pin Configurations diagram on page 9 of the datasheet.
MAX6388XS26D4-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:
- 1.12s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS26D4-T FAQ
1.How can I place an order for MAX6388XS26D4-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS26D4-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 MAX6388XS26D4-T reliable?
The price and inventory of MAX6388XS26D4-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS26D4-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS26D4-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS26D4-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS26D4-T?
MAX6388XS26D4-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS26D4-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 MAX6388XS26D4-T?
For technical support, including MAX6388XS26D4-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS26D4-T requirements.
6.How does Aetrix verify that MAX6388XS26D4-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS26D4-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 MAX6388XS26D4-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS26D4-T?
All MAX6388XS26D4-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS26D4-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 MAX6388XS26D4-T part is unused and in its original packaging.
Return procedure for MAX6388XS26D4-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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