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Analog Devices Inc./Maxim Integrated MAX6388XS26D6-T
- Part No.:
- MAX6388XS26D6-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS26D6-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,113
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Product details
Overview
MAX6388XS26D6-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), 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, targeting power-critical embedded systems requiring reliable brownout detection.
For engineers reviewing the MAX6388XS26D6-T datasheet, MAX6388XS26D6-T pinout, MAX6388XS26D6-T application, or MAX6388XS26D6-T equivalent, key selection criteria include its 2.63V reset threshold accuracy, 560ms VCC timeout, 4-pin SC70 package footprint, RESET IN comparator interface, and compatibility with dual-rail voltage monitoring in portable and automotive subsystems.
Technical Context
The MAX6388XS26D6-T integrates a precision bandgap reference and comparator to monitor VCC against a fixed 2.63V threshold while simultaneously accepting an external voltage via RESET IN (compared to internal 1.27V reference). Its reset assertion logic triggers on either VCC falling below 2.63V or RESET IN falling below 1.27V, with independent timing control.
It features a guaranteed-valid active-high push-pull RESET output down to VCC = 1.0V, supports negative-going VCC transient immunity up to 35µs at 100mV overdrive, and includes no internal manual reset (MR) input-distinguishing it from MAX6384–MAX6386/MAX6390 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.63V (nominal), ±2.5% over −40°C to +125°C - ensures stable brownout detection across automotive temperature range |
| Reset Timeout Period | 560ms (min) - guarantees sufficient processor initialization time after power recovery |
| Supply Current | 3μA at VCC = 1.8V - enables multi-year battery life in always-on monitoring applications |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup resistor and simplifies interface to μP reset input |
| Auxiliary Input | RESET IN pin with 1.27V internal reference - allows user-defined second-voltage threshold via resistor divider |
| Operating Voltage Range | 1.0V to 5.5V - supports operation during deep brownout and compatibility with 1.2V/1.8V/3.3V/5V rails |
| Reset Propagation Delay | 4.5µs (RESET IN to RESET) - enables fast response to secondary supply faults |
Pinout & Package
MAX6388XS26D6-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), 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 rail; powers internal circuitry and sets comparator 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 sensing |
| 4 | RESET IN | High-impedance auxiliary input; compared to internal 1.27V reference; used with external resistor divider to monitor second voltage rail |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneous monitoring of VCC (2.63V threshold) and external rail via RESET IN (1.27V reference), enabling fault detection across core/I/O domains |
| Low-power operation | 3μA supply current at 1.8V allows integration into energy-harvesting and coin-cell-powered systems without compromising battery life |
| Guaranteed reset validity | RESET output remains logic-valid down to VCC = 1.0V, ensuring deterministic behavior during deep undervoltage conditions |
| Negative transient immunity | Withstands VCC glitches up to 35µs duration at 100mV overdrive, reducing false resets in electrically noisy environments |
| Small-footprint packaging | 4-pin SC70 (2.0mm × 2.1mm) minimizes board area versus 6-pin µDFN alternatives while maintaining thermal performance (θJA = 322.6°C/W) |
Applications
| Industrial Sensor Node | Automotive Body Control Module |
|---|---|
Use Scenario: Battery-powered environmental sensor node operating on 3.3V main rail and 1.8V MCU core, requiring fail-safe restart on either rail collapse. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting active-high RESET to ARM Cortex-M0+ when VCC < 2.63V or RESET IN < 1.27V (indicating 1.8V rail failure). Use Value: Prevents corrupted firmware execution by guaranteeing 560ms reset hold time after both rails stabilize, meeting IEC 61508 functional safety timing requirements. | Use Scenario: Low-power door module monitoring 12V battery-derived 5V supply and isolated 3.3V CAN transceiver rail. IC Role / Device Role / Timing Role: Supervises primary 5V rail (2.63V threshold) and secondary 3.3V rail via RESET IN divider; asserts RESET on first fault with no manual reset dependency. Use Value: Enables AEC-Q100-compliant fault response without external debounce or timing components, reducing BOM count and layout complexity. |
| Medical Wearable Power Sequencer | POS Terminal Power Manager |
Use Scenario: Wearable ECG device with separate analog front-end (2.5V) and digital subsystem (1.8V), powered by single Li-ion cell. IC Role / Device Role / Timing Role: Monitors boosted 2.5V rail as VCC and derived 1.8V rail via RESET IN; generates synchronized reset pulse to both subsystems. Use Value: Ensures atomic power-up sequencing across mixed-signal domains using one compact IC, eliminating risk of analog-digital timing skew. | Use Scenario: Retail point-of-sale terminal with 5V main logic supply and 3.3V display backlight driver, subject to load-switch-induced transients. IC Role / Device Role / Timing Role: Detects 5V brownout (2.63V threshold) and 3.3V rail sag (via RESET IN); provides glitch-immune 560ms reset to prevent transaction corruption. Use Value: Meets EMVCo power-failure robustness requirements by rejecting sub-40µs transients while asserting reset on sustained undervoltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT26D6-T | Same electrical specs but in 6-pin µDFN package (1.5mm × 1.5mm); higher thermal resistance (θJA = 477°C/W) | Better suited for thermally demanding environments where 6-pin layout allows improved heat spreading | Select when board layout permits larger footprint and thermal management requires lower junction-to-ambient resistance |
| TPS3808G33DBVR | TI part with 3.3V reset threshold, 200ms timeout, open-drain output, and no RESET IN pin | Limited to single-rail monitoring; requires external pullup; lacks dual-supply capability | Choose only if 3.3V threshold matches system requirement and auxiliary monitoring is unnecessary |
Compared with MAX6388XS26D6-T, the LT26D6-T offers identical supervision functionality in a thermally superior µDFN package but occupies more PCB area, while the TPS3808G33DBVR provides basic single-rail reset at lower cost but omits RESET IN capability and uses open-drain output requiring external components.
Availability
MAX6388XS26D6-T is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, medical wearables, POS terminals, and dual-voltage embedded systems requiring stable component supply and long-term lifecycle support.
Supply support for MAX6388XS26D6-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 computing applications.
The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy reset supervision for battery-operated and safety-critical systems, with variants optimized for single/dual-rail monitoring, manual reset, and automotive qualification.
FAQ
What is the exact reset threshold voltage of MAX6388XS26D6-T and how stable is it over temperature?
The MAX6388XS26D6-T has a nominal VCC reset threshold of 2.63V, with guaranteed accuracy of ±2.5% across the full operating temperature range of −40°C to +125°C. Its tempco is 60ppm/°C, meaning threshold drift is tightly bounded and predictable, making it suitable for automotive and industrial applications where voltage margin analysis is critical. This specification is confirmed in the Electrical Characteristics table of the official datasheet.
Does MAX6388XS26D6-T include a manual reset (MR) input?
No, MAX6388XS26D6-T does not feature a manual reset input. According to the Selector Guide and Pin Configurations, MR is present only on MAX6384/MAX6385/MAX6386/MAX6390 variants. The MAX6388XS26D6-T is designated as a dual-supply supervisor with RESET IN but no MR pin - confirmed by its 4-pin SC70 pinout (VCC, RESET, GND, RESET IN) and absence of MR in all functional descriptions.
What is the function of the RESET IN pin on MAX6388XS26D6-T and how is it used?
The RESET IN pin on MAX6388XS26D6-T is a high-impedance input compared to an internal 1.27V reference. It enables monitoring of a second voltage rail by connecting an external resistor divider to set a custom threshold using the formula VINTH = 1.27V × (R1/R2 + 1). When the divided voltage falls below 1.27V, reset asserts independently of VCC. This allows true dual-rail supervision without additional ICs, as documented in the Applications Information section.
What package type and dimensions does MAX6388XS26D6-T use?
MAX6388XS26D6-T uses a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm with a 0.65mm pin pitch. This RoHS-compliant, lead-free package is explicitly listed in the Ordering Information table and Pin Configurations diagram for the "XS" prefix variants. Its small footprint supports high-density PCB designs while maintaining adequate thermal performance (θJA = 322.6°C/W).
How does the reset timeout period of MAX6388XS26D6-T compare to other members of the MAX6381–MAX6390 family?
MAX6388XS26D6-T has a 560ms minimum reset timeout period, corresponding to the "D6" suffix per the Reset Timeout Delay table. This places it between the 280ms (D5) and 1120ms (D4) options, offering a balanced hold time for mid-speed processors. Unlike MAX6390, it does not offer separate VCC/manual reset timeouts - its single timeout applies exclusively to VCC and RESET IN events, as confirmed in the Electrical Characteristics table under "Reset Timeout Period (MAX6381–MAX6389)".
MAX6388XS26D6-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:
- 560ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS26D6-T FAQ
1.How can I place an order for MAX6388XS26D6-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS26D6-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 MAX6388XS26D6-T reliable?
The price and inventory of MAX6388XS26D6-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS26D6-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS26D6-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS26D6-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS26D6-T?
MAX6388XS26D6-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS26D6-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 MAX6388XS26D6-T?
For technical support, including MAX6388XS26D6-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS26D6-T requirements.
6.How does Aetrix verify that MAX6388XS26D6-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS26D6-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 MAX6388XS26D6-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS26D6-T?
All MAX6388XS26D6-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS26D6-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 MAX6388XS26D6-T part is unused and in its original packaging.
Return procedure for MAX6388XS26D6-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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