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Analog Devices Inc./Maxim Integrated MAX6388XS26D7-T
- Part No.:
- MAX6388XS26D7-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS26D7-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,998
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Product details
Overview
MAX6388XS26D7-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), 1200ms 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 instrumentation and dual-rail embedded controllers.
For engineers reviewing the MAX6388XS26D7-T datasheet, MAX6388XS26D7-T pinout, MAX6388XS26D7-T application, or MAX6388XS26D7-T equivalent, key selection criteria include its 2.63V threshold accuracy, 1200ms timeout, 4-pin SC70 package, RESET IN comparator interface, and compatibility with systems requiring secondary voltage supervision alongside main VCC monitoring.
Technical Context
The MAX6388XS26D7-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 an internal 1.27V reference. Its reset assertion logic triggers on either VCC falling below 2.63V or RESET IN falling below 1.27V.
It features a guaranteed active-high push-pull RESET output that remains asserted for ≥1200ms after VCC recovers, with no external pullup required. The device operates across -40°C to +125°C and maintains ±2.5% threshold accuracy over full temperature range, supporting automotive-grade reliability without requiring manual reset input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V nominal, ±2.5% over -40°C to +125°C - ensures reliable brownout detection across automotive/industrial temperature ranges |
| VCC Reset Timeout | 1200ms minimum - provides sufficient hold time for complex μP initialization sequences |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered portable devices |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup resistor and supports direct connection to μP reset input |
| Auxiliary Input | RESET IN pin with 1.27V internal reference - allows user-configurable second-supply monitoring via resistor divider |
| Operating Voltage Range | +1.0V to +5.5V - supports operation during deep brownout and compatibility with 1.2V–5V system rails |
| Reset Output Validity | Guaranteed down to VCC = 1V - ensures deterministic reset state even during severe supply collapse |
Pinout & Package
MAX6388XS26D7-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), optimized for space-constrained PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor rail - powers internal circuitry and sets reset trigger point at 2.63V |
| 2 | RESET | Active-high push-pull output - drives high during reset condition; sinks current when deasserted; no external pullup needed |
| 3 | GND | Ground reference for all internal comparators and output stage - must be low-impedance connection to system ground plane |
| 4 | RESET IN | High-impedance auxiliary voltage monitor input - compared to internal 1.27V reference; enables dual-supply supervision with external resistor divider |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply monitoring capability | Simultaneous VCC and RESET IN supervision enables robust power sequencing in multi-rail systems like SoC-based controllers |
| Factory-trimmed 2.63V threshold | Eliminates external resistor networks and calibration effort while maintaining ±2.5% accuracy over full industrial temperature range |
| 1200ms minimum reset timeout | Ensures μP reset pulse meets or exceeds boot ROM and PLL lock timing requirements in modern embedded processors |
| 3μA supply current at 1.8V | Extends battery life in always-on sensor nodes and portable medical instruments where quiescent power dominates lifetime budget |
| Valid reset output down to VCC = 1V | Prevents metastability in μP reset input during rapid power collapse, improving system-level fault recovery predictability |
Applications
| Portable Medical Sensors | Automotive Body Control Modules |
|---|---|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell with dual-rail analog front-end (1.8V) and digital core (3.3V). IC Role / Device Role / Timing Role: Supervises both rails via VCC (1.8V) and RESET IN (3.3V-derived), asserting active-high RESET until both supplies stabilize for ≥1200ms. Use Value: Prevents firmware execution errors during cold-start and battery sag, leveraging ultra-low 3μA ICC to extend device runtime beyond 2 years. | Use Scenario: Door module with LIN transceiver, MCU, and LED drivers supplied from 5V and 12V-derived 3.3V rails. IC Role / Device Role / Timing Role: Monitors 5V main supply (VCC) and 3.3V domain (via RESET IN) to guarantee synchronized reset across mixed-voltage subsystems. Use Value: Eliminates race conditions during ignition-on power-up by enforcing 1200ms minimum reset hold time across all domains. |
| Industrial PLC I/O Cards | Battery-Backed Real-Time Clock Systems |
Use Scenario: DIN-rail mounted I/O card with isolated 24V-to-5V and 5V-to-3.3V converters powering FPGA and communication ICs. IC Role / Device Role / Timing Role: Uses VCC to supervise 5V rail and RESET IN to monitor 3.3V FPGA core voltage, triggering unified reset on either fault. Use Value: Ensures deterministic startup sequence across isolation barriers without adding discrete comparators or timing RC networks. | Use Scenario: RTC module backed by supercapacitor, operating from 1.8V backup rail and 3.3V main rail. IC Role / Device Role / Timing Role: VCC monitors 1.8V backup supply; RESET IN monitors 3.3V main supply - asserts RESET if either drops, guaranteeing clean RTC initialization. Use Value: Maintains timekeeping integrity during main power loss by enabling immediate switchover and preventing partial register writes during brownout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT26D7-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 environments or where board space permits larger package | Select when higher power dissipation margin or existing μDFN layout reuse is prioritized over miniaturization |
| TPS3808G33DBVR | TI part with 3.3V threshold, 200ms timeout, open-drain output, and no RESET IN - lacks dual-supply monitoring and longer timeout | Applicable only for single-rail 3.3V systems requiring shorter reset hold time and external pullup | Choose only if 3.3V threshold matches system VCC and dual-monitoring is unnecessary; requires redesign for pullup and timing compliance |
Compared with MAX6388XS26D7-T, the MAX6388LT26D7-T offers identical functionality in a thermally superior but larger package, while the TPS3808G33DBVR provides basic reset supervision at 3.3V without auxiliary monitoring or extended timeout - making it unsuitable for dual-rail or long-hold applications.
Availability
MAX6388XS26D7-T is available at Aetrix Electronics and suitable for portable medical sensors, automotive body control modules, industrial PLC I/O cards, and battery-backed real-time clock systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6388XS26D7-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 industrial, automotive, and computing applications, emphasizing low power, high reliability, and integration.
The MAX6381–MAX6390 family delivers single/dual low-voltage supervisory circuits targeting space- and power-constrained embedded systems requiring guaranteed reset behavior across wide temperature and supply ranges.
FAQ
What is the exact reset threshold voltage of the MAX6388XS26D7-T and how stable is it over temperature?
The MAX6388XS26D7-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 using a precision bandgap reference and laser-trimmed resistors, ensuring consistent brownout detection without external calibration. The MAX6388XS26D7-T maintains this tolerance across all production units and environmental conditions specified in the datasheet.
Does the MAX6388XS26D7-T require an external pullup resistor on its RESET pin?
No, the MAX6388XS26D7-T features an active-high push-pull RESET output, which actively drives high during reset assertion and actively pulls low when deasserted. This eliminates the need for an external pullup resistor, simplifying BOM and reducing board area. The MAX6388XS26D7-T's output stage is rated to sink/source sufficient current to directly drive standard μP reset inputs without additional components.
Can the MAX6388XS26D7-T monitor two different supply voltages simultaneously?
Yes, the MAX6388XS26D7-T supports dual-supply monitoring: VCC is monitored against its fixed 2.63V threshold, while the RESET IN pin accepts an external voltage compared to an internal 1.27V reference. By connecting a resistor divider to RESET IN, users can configure supervision of a second rail (e.g., 3.3V or 5V). The MAX6388XS26D7-T asserts RESET if either VCC falls below 2.63V or the divided RESET IN voltage drops below 1.27V.
What is the minimum supply voltage at which the MAX6388XS26D7-T guarantees correct RESET output logic state?
The MAX6388XS26D7-T guarantees valid RESET output logic state down to VCC = 1.0V. Below this level, the internal circuitry may not maintain defined behavior, but above 1.0V - including during brownout recovery - the RESET output remains deterministically high or low per its specification. This feature ensures predictable μP reset behavior even during severe supply collapse, a critical requirement in battery-powered and automotive applications.
Is the MAX6388XS26D7-T qualified for automotive applications?
The MAX6388XS26D7-T is not explicitly automotive-qualified; its ordering suffix does not include "/V", which denotes AEC-Q100 qualification in the MAX6381–MAX6390 family. While it operates across -40°C to +125°C and meets industrial reliability standards, automotive use requires verification of qualification status via the specific /V-trim version (e.g., MAX6388XS26D7/V+T). Always consult the official Maxim Integrated (Analog Devices) ordering information for certified automotive variants of the MAX6388XS26D7-T.
MAX6388XS26D7-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:
- 1.2s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS26D7-T FAQ
1.How can I place an order for MAX6388XS26D7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS26D7-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 MAX6388XS26D7-T reliable?
The price and inventory of MAX6388XS26D7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS26D7-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS26D7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS26D7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS26D7-T?
MAX6388XS26D7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS26D7-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 MAX6388XS26D7-T?
For technical support, including MAX6388XS26D7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS26D7-T requirements.
6.How does Aetrix verify that MAX6388XS26D7-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS26D7-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 MAX6388XS26D7-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS26D7-T?
All MAX6388XS26D7-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS26D7-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 MAX6388XS26D7-T part is unused and in its original packaging.
Return procedure for MAX6388XS26D7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6388XS26D7-T Tags
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