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Analog Devices Inc./Maxim Integrated MAX6388XS26D2-T
- Part No.:
- MAX6388XS26D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS26D2-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,660
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Product details
Overview
MAX6388XS26D2-T from Maxim Integrated is a low-power, dual-voltage 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), 20ms minimum 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, targeting power-critical embedded systems requiring reliable brownout detection and dual-rail supervision.
For engineers reviewing the MAX6388XS26D2-T datasheet, MAX6388XS26D2-T pinout, MAX6388XS26D2-T application, or MAX6388XS26D2-T equivalent, key selection criteria include its 2.63V fixed reset threshold, 20ms VCC reset timeout, 4-pin SC70 package, guaranteed reset validity down to VCC = 1V, and support for external resistor-divider–based secondary voltage monitoring via RESET IN.
Technical Context
The MAX6388XS26D2-T integrates a precision bandgap reference and comparator to monitor VCC against a factory-trimmed 2.63V threshold, asserting RESET when VCC falls below this level. Its internal timer guarantees a minimum 20ms reset assertion after VCC recovers above threshold.
A dedicated high-impedance RESET IN input compares an external voltage (via resistor divider) to a stable +1.27V internal reference; reset asserts if either VCC < 2.63V or RESET IN < 1.27V. The active-high push-pull RESET output drives logic-high during reset and is valid down to VCC = 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V ±2.5% over –40°C to +125°C - ensures accurate brownout detection across automotive/industrial temperature range |
| Reset Timeout | 20ms min - provides sufficient hold time for μP initialization before release |
| Supply Current | 3μA at VCC = 1.8V - enables multi-year battery life in portable equipment |
| Operating Voltage | 1.0V to 5.5V - supports operation during deep brownout and compatibility with 1.2V–5V logic rails |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup and ensures fast, rail-to-rail logic levels |
| RESET IN Threshold | +1.27V internal reference - allows user-defined secondary reset point via resistor divider (e.g., 3.3V core or I/O rail) |
| Reset Propagation Delay | 4.5µs max (RESET IN → RESET) - enables rapid response to auxiliary supply faults |
Pinout & Package
MAX6388XS26D2-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm, suitable for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor - powers device and triggers reset when falling below 2.63V |
| 2 | RESET | Active-high push-pull output - drives high during reset condition; sinks current when deasserted |
| 3 | GND | Analog/digital ground reference - must be connected to system ground plane for stable reference |
| 4 | RESET IN | Auxiliary voltage monitor input - high-impedance node compared to +1.27V reference; accepts external resistor-divider network |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneously monitors VCC (2.63V) and external rail via RESET IN (+1.27V reference), enabling single-chip protection of core/I/O supplies |
| Guaranteed reset validity to 1V | Ensures correct RESET logic state even during severe brownout - critical for fail-safe μP restart |
| Negative-going transient immunity | Rejects short-duration VCC glitches (e.g., <100ns at 100mV overdrive), reducing false resets in noisy environments |
| Low quiescent current | 3μA at 1.8V enables integration into always-on subsystems without compromising battery runtime |
| Factory-trimmed accuracy | ±2.5% threshold tolerance over full temperature range eliminates need for external calibration or trimming |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors both 3.3V I/O supply and 1.2V core voltage in a programmable logic controller exposed to wide ambient temperatures and EMI. IC Role / Device Role / Timing Role: Dual-rail supervisor providing synchronized reset assertion when either rail drops below safe operating level. Use Value: Prevents corrupted firmware execution during partial power loss by ensuring μP remains held in reset until both supplies stabilize. | Use Scenario: Supervises 5V sensor bus and 2.8V microcontroller supply in a vehicle body control unit subject to load-dump transients and cold-cranking conditions. IC Role / Device Role / Timing Role: Primary reset generator with auxiliary input configured to detect undervoltage on switched 5V rail. Use Value: Enables deterministic system recovery after battery voltage sag, meeting AEC-Q100 reliability requirements for automotive electronics. |
| Medical Wearable Sensor Hub | Smart Energy Meter MCU |
Use Scenario: Powers from coin-cell battery and requires ultra-low current consumption while supervising 1.8V BLE SoC and 3.0V analog front-end. IC Role / Device Role / Timing Role: Low-power supervisor with RESET IN used to monitor regulated 3.0V rail derived from boost converter. Use Value: Extends battery life beyond 3 years while guaranteeing safe boot sequence under variable load conditions. | Use Scenario: Embedded in utility meter with isolated power domains: 3.3V communication interface and 1.2V metrology processor. IC Role / Device Role / Timing Role: Dual-supply monitor asserting reset if either domain falls below specification, with 20ms timeout matching MCU boot timing. Use Value: Eliminates need for discrete comparators and timers, reducing BOM count and PCB area by >40%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT26D2-T | Same electrical specs but in 6-pin μDFN package - larger footprint, better thermal performance (θJA = 477°C/W vs. 322.6°C/W) | Suitable for thermally demanding industrial designs where SC70 thermal limits may be exceeded | Select when board layout allows larger package and higher power dissipation margin is required |
| TLV809E26DBZR | Single-supply reset IC with 2.63V threshold and 20ms timeout, but no RESET IN input - lacks dual-voltage monitoring capability | Applicable only where supervision of one rail suffices; cannot replace dual-monitoring function of MAX6388XS26D2-T | Choose only if auxiliary voltage monitoring is unnecessary and cost reduction is prioritized over feature set |
Compared with MAX6388LT26D2-T, the MAX6388XS26D2-T offers identical supervision functionality in a smaller 4-pin SC70 package ideal for compact designs, while TLV809E26DBZR provides lower-cost single-rail supervision but omits the critical RESET IN feature needed for dual-supply systems.
Availability
MAX6388XS26D2-T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical wearable sensor hubs, and smart energy meter MCUs requiring stable component supply and long-term production continuity.
Supply support for MAX6388XS26D2-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 semiconductor solutions for industrial, automotive, communications, and computing markets.
The MAX6381–MAX6390 family delivers ultra-low-power, factory-trimmed microprocessor supervisory circuits optimized for space- and power-constrained embedded systems requiring dual-rail monitoring and AEC-Q100 compliance.
FAQ
What is the exact reset threshold voltage of the MAX6388XS26D2-T?
The MAX6388XS26D2-T has a factory-set VCC reset threshold of 2.63V, with guaranteed accuracy of ±2.5% over the full operating temperature range of –40°C to +125°C. This value is confirmed in the Reset Thresholds table of the datasheet and applies specifically to the "26" suffix in the part number. The MAX6388XS26D2-T uses this fixed threshold to assert reset whenever VCC falls below this level.
Does the MAX6388XS26D2-T support monitoring of a second voltage rail?
Yes, the MAX6388XS26D2-T includes a dedicated RESET IN input that compares an external voltage to an internal +1.27V reference. When the voltage at RESET IN falls below 1.27V, the device asserts reset - independent of VCC status. This enables true dual-voltage supervision, such as monitoring both a 3.3V I/O rail and 1.2V core rail using a simple resistor divider. The MAX6388XS26D2-T leverages this feature to provide coordinated reset signaling across multiple power domains.
What is the reset timeout duration for the MAX6388XS26D2-T?
The MAX6388XS26D2-T provides a minimum reset timeout period of 20ms after VCC rises above the 2.63V threshold. This value corresponds to the "D2" suffix in the part number and is guaranteed across temperature and supply voltage. The timeout ensures the microprocessor remains held in reset long enough to complete stable power-up sequencing. The MAX6388XS26D2-T does not support manual reset input - its timeout applies solely to VCC recovery events.
What package type and pin count does the MAX6388XS26D2-T use?
The MAX6388XS26D2-T is packaged in a 4-pin SC70 (SOT-323) outline, with dimensions of 2.0mm × 2.1mm × 0.95mm. Pin assignments are: Pin 1 = VCC, Pin 2 = RESET (active-high push-pull), Pin 3 = GND, Pin 4 = RESET IN. This RoHS-compliant package is identified by outline number 21-0098 and land pattern 90-0187. The MAX6388XS26D2-T's compact form factor supports high-density PCB layouts in portable and space-constrained applications.
Is the MAX6388XS26D2-T qualified for automotive applications?
No, the MAX6388XS26D2-T is not automotive-qualified. While it operates across –40°C to +125°C and meets AEC-Q100 requirements in its /V-trim variants (e.g., MAX6388XS26D2/V+T), the standard MAX6388XS26D2-T lacks the automotive qualification suffix and associated test documentation. For automotive use, designers must select the /V version. The MAX6388XS26D2-T is intended for industrial, medical, and consumer applications requiring extended temperature operation but not formal automotive certification.
MAX6388XS26D2-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:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS26D2-T FAQ
1.How can I place an order for MAX6388XS26D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS26D2-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 MAX6388XS26D2-T reliable?
The price and inventory of MAX6388XS26D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS26D2-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS26D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS26D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS26D2-T?
MAX6388XS26D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS26D2-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 MAX6388XS26D2-T?
For technical support, including MAX6388XS26D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS26D2-T requirements.
6.How does Aetrix verify that MAX6388XS26D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS26D2-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 MAX6388XS26D2-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS26D2-T?
All MAX6388XS26D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS26D2-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 MAX6388XS26D2-T part is unused and in its original packaging.
Return procedure for MAX6388XS26D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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