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Analog Devices Inc./Maxim Integrated MAX6388XS26D1-T
- Part No.:
- MAX6388XS26D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS26D1-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,267
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Product details
Overview
MAX6388XS26D1-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), 1ms 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 MAX6388XS26D1-T datasheet, MAX6388XS26D1-T pinout, MAX6388XS26D1-T application, or MAX6388XS26D1-T equivalent, key selection criteria include its 2.63V reset threshold accuracy, 1ms reset timeout, 4-pin SC70 package footprint, dual-supply monitoring capability via RESET IN, and guaranteed reset validity down to VCC = 1V.
Technical Context
The MAX6388XS26D1-T integrates a precision voltage comparator for VCC monitoring against a factory-trimmed 2.63V threshold and a separate high-impedance RESET IN comparator referenced to 1.27V, enabling user-defined secondary voltage supervision via external resistor divider. Its internal timer ensures reset assertion for ≥1ms 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 cleanly upon recovery, eliminating need for external pullup. The device guarantees correct logic state of RESET down to VCC = 1V and provides immunity to negative-going VCC transients up to 100mV overdrive with ≤35µs duration.
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 | 1ms minimum - provides sufficient hold time for microprocessor initialization without excessive system delay |
| Supply Current | 3μA at +1.8V - enables use in battery-powered or ultra-low-power systems with minimal quiescent load |
| RESET Output Type | Active-high push-pull - eliminates external pullup resistor, simplifies board layout and reduces BOM count |
| Auxiliary Input | RESET IN comparator referenced to 1.27V - supports user-configurable second-supply monitoring via resistor divider |
| Operating Voltage Range | 1.0V to 5.5V - guarantees functional reset assertion even during deep brownout conditions |
| Reset Assertion Delay | 35µs max for VCC falling at 10mV/µs - ensures fast response to rapid supply collapse |
Pinout & Package
MAX6388XS26D1-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 point; powers internal circuitry and feeds VCC reset comparator |
| 2 | RESET | Active-high push-pull reset output; drives high during fault and returns low after timeout - no external pullup required |
| 3 | GND | Ground reference for all internal comparators, timers, and output stage; must be low-impedance connection |
| 4 | RESET IN | Auxiliary high-impedance input to secondary comparator; accepts divided voltage for custom reset threshold setting |
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 platforms |
| Factory-trimmed reset threshold | 2.63V ±2.5% over full temperature range eliminates need for external calibration or trimming components |
| Guaranteed operation down to VCC = 1V | Ensures valid reset signaling during severe brownout, preventing undefined μP states before complete power loss |
| Negative-going transient immunity | Withstands VCC glitches ≤35µs wide at 100mV overdrive - reduces false resets in electrically noisy environments |
| Low-quiescent-current design | 3μA at 1.8V allows integration into always-on subsystems without compromising battery life or thermal budget |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Monitoring both main 5V logic rail and isolated 3.3V sensor interface supply in programmable logic controller modules. IC Role / Device Role / Timing Role: Dual-voltage supervisor asserting active-high reset to ARM Cortex-M microcontroller when either rail drops below threshold. Use Value: Prevents firmware corruption during partial power loss by ensuring coordinated reset across multiple voltage domains. |
Use Scenario: Supervising 12V-to-5V DC-DC converter output and 5V-to-3.3V LDO output in body control module powering door locks and lighting drivers. IC Role / Device Role / Timing Role: Provides fail-safe reset initiation using VCC and RESET IN inputs, with 1ms timeout matching MCU boot timing requirements. Use Value: Meets AEC-Q100 reliability requirements while enabling compact 4-pin SC70 placement near critical power rails. |
| Medical Wearable Sensors | Smart Energy Meters |
Use Scenario: Ensuring clean startup and brownout recovery for ultra-low-power BLE SoC powered by coin-cell battery and regulated 1.8V supply. IC Role / Device Role / Timing Role: Low-current (3μA) supervisor maintaining reset integrity down to VCC = 1V during battery depletion. Use Value: Extends usable battery life while guaranteeing deterministic MCU reset behavior at end-of-life voltage. |
Use Scenario: Monitoring both 3.3V real-time clock supply and 5V metering ASIC supply in ANSI C12.22-compliant smart meters. IC Role / Device Role / Timing Role: Dual-input supervision with factory-set 2.63V threshold on VCC and adjustable RESET IN threshold for secondary rail. Use Value: Eliminates risk of corrupted metering data during grid voltage sags by enforcing synchronized reset across subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT26D1-T | Same electrical specs but in 6-pin µDFN package (1.5mm × 1.5mm) instead of 4-pin SC70 | Better thermal performance (θJA = 477°C/W vs. 322.6°C/W) and higher power dissipation margin (167.7mW vs. 245mW) | Select when board layout allows larger footprint and thermal management is critical |
| MAX6385XS26D1-T | Identical 4-pin SC70 package and 2.63V/1ms specs, but includes debounced manual reset (MR) input | Supports operator-initiated reset via pushbutton; MR has internal 63kΩ pullup and 1µs minimum pulse width | Choose when field-serviceable manual reset functionality is required alongside dual-supply monitoring |
Compared with MAX6388XS26D1-T, the LT version offers superior thermal handling in µDFN but requires more PCB area, while the XS26D1 variant with MR adds system-level debug capability at no cost to core supervision performance.
Availability
MAX6388XS26D1-T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, medical wearable sensors, and smart energy meters requiring stable component supply and AEC-Q100-aligned reliability.
Supply support for MAX6388XS26D1-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 communications applications.
The MAX6381–MAX6390 family delivers single/dual low-voltage microprocessor reset circuits optimized for ultra-low power consumption, high accuracy, and compact packaging in harsh operating environments.
FAQ
What is the exact reset threshold voltage of the MAX6388XS26D1-T and how stable is it over temperature?
The MAX6388XS26D1-T has a factory-set VCC reset threshold of 2.63V nominal, with guaranteed accuracy of ±2.5% over the full -40°C to +125°C operating range. This stability is achieved through laser trimming during production and supported by a low 60ppm/°C tempco, making it suitable for automotive and industrial applications where supply voltage margins are tight.
Does the MAX6388XS26D1-T support monitoring of a second voltage rail, and if so, how is it implemented?
Yes, the MAX6388XS26D1-T includes a dedicated RESET IN input that connects to an internal comparator referenced to 1.27V. To monitor a second voltage, apply a scaled version of that rail to RESET IN using a resistor divider - for example, to set a 3.3V threshold, use R1/R2 ≈ 1.60 based on VINTH = 1.27V × (R1/R2 + 1). The input leakage is only ±1nA, preserving accuracy with standard resistor values.
What is the function of the RESET output on the MAX6388XS26D1-T, and what drive strength does it provide?
The RESET output of the MAX6388XS26D1-T is an active-high push-pull driver. It asserts high during reset conditions (VCC or RESET IN below threshold) and deasserts low after the 1ms timeout. It sources up to 800µA at VCC ≥ 4.5V (VOH ≥ 0.8×VCC) and sinks up to 3.2mA (VOL ≤ 0.4V), eliminating need for external pullup resistors and ensuring robust interfacing with modern microcontrollers.
Can the MAX6388XS26D1-T operate reliably at very low supply voltages, and what is its minimum functional VCC?
Yes, the MAX6388XS26D1-T is guaranteed to maintain valid RESET output logic states down to VCC = 1.0V. Its internal circuitry remains functional across the full 1.0V to 5.5V operating range, and the reset comparator continues to assert correctly even during deep brownout - a critical feature for battery-powered devices nearing end-of-life.
Is the MAX6388XS26D1-T qualified for automotive applications, and what package options support this qualification?
The MAX6388XS26D1-T itself is not automotive-qualified; however, the /V automotive-grade variants (e.g., MAX6388XS26D1/V+T) are AEC-Q100 qualified and share identical electrical specifications. These /V versions are offered in both 4-pin SC70 and 6-pin µDFN packages and undergo additional stress testing for temperature cycling, humidity, and vibration per automotive standards.
MAX6388XS26D1-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:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS26D1-T FAQ
1.How can I place an order for MAX6388XS26D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS26D1-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 MAX6388XS26D1-T reliable?
The price and inventory of MAX6388XS26D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS26D1-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS26D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS26D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS26D1-T?
MAX6388XS26D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS26D1-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 MAX6388XS26D1-T?
For technical support, including MAX6388XS26D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS26D1-T requirements.
6.How does Aetrix verify that MAX6388XS26D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS26D1-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 MAX6388XS26D1-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS26D1-T?
All MAX6388XS26D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS26D1-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 MAX6388XS26D1-T part is unused and in its original packaging.
Return procedure for MAX6388XS26D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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