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Analog Devices Inc./Maxim Integrated MAX6388XS32D2-T
- Part No.:
- MAX6388XS32D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS32D2-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,977
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Product details
Overview
MAX6388XS32D2-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 3.20V VCC reset threshold (±2.5% over -40°C to +125°C), 20ms minimum 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 MAX6388XS32D2-T datasheet, MAX6388XS32D2-T pinout, MAX6388XS32D2-T application, or MAX6388XS32D2-T equivalent, key selection criteria include its 4-pin SC70 package, 3.20V threshold accuracy, 20ms VCC reset delay, RESET IN comparator reference of +1.27V, and compatibility with dual-supply brownout detection in portable instrumentation.
Technical Context
The MAX6388XS32D2-T integrates a precision voltage comparator for VCC monitoring and a separate high-impedance RESET IN comparator referenced to +1.27V, enabling independent supervision of two power rails. Its internal timer enforces a guaranteed minimum 20ms reset assertion after VCC rises above 3.20V or after RESET IN recovers.
This device uses BiCMOS process technology and features negative-going VCC transient immunity up to 35µs at 100mV overdrive. The active-high push-pull RESET output drives high during fault conditions and remains valid down to VCC = 1V without external pullup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.20V nominal, ±2.5% over -40°C to +125°C - ensures reliable brownout detection across automotive temperature range |
| Reset Timeout Period | 20ms minimum - provides sufficient hold time for μP initialization before release |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered devices |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup resistor on reset line |
| RESET IN Threshold | +1.27V reference - allows user-defined secondary reset point via resistor divider |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout |
| Package | 4-pin SC70 (X4+1 outline) - footprint-compatible with space-constrained portable PCBs |
Pinout & Package
MAX6388XS32D2-T is housed in a 4-pin SC70 package (outline 21-0098, land pattern 90-0187), optimized for low-profile portable designs. Pin 1 = VCC, Pin 2 = RESET (active-high push-pull), Pin 3 = RESET IN, Pin 4 = GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor rail; powers internal comparators and timer |
| 2 | RESET | Active-high push-pull output; asserts high during VCC or RESET IN undervoltage; no external pullup required |
| 3 | RESET IN | High-impedance auxiliary input; compared to +1.27V reference; enables dual-rail monitoring via external resistor divider |
| 4 | GND | Analog and digital ground reference; must be connected directly to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneous monitoring of VCC and external rail via RESET IN comparator referenced to +1.27V |
| Low-power operation | 3μA supply current at +1.8V enables >10-year battery life in always-on sensor nodes |
| Guaranteed reset validity | RESET output remains logic-valid down to VCC = 1V - critical for graceful shutdown sequencing |
| Negative transient immunity | Withstands VCC glitches up to 35µs duration at 100mV overdrive - reduces false resets in noisy environments |
| Factory-trimmed accuracy | ±2.5% reset threshold tolerance over full industrial temperature range eliminates calibration overhead |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered glucose meter with dual-core MCU requiring coordinated reset of core and I/O supplies. IC Role / Device Role / Timing Role: Supervises 3.3V core rail and 1.8V sensor interface rail; asserts active-high RESET when either falls below threshold. Use Value: Prevents corrupted ADC readings during brownout by holding MCU in reset until both rails stabilize for ≥20ms. |
Use Scenario: DIN-rail mounted controller with isolated 5V and 24V power domains needing independent fault detection. IC Role / Device Role / Timing Role: Uses RESET IN to monitor 24V-derived 3.2V bias rail while VCC tracks 5V main supply. Use Value: Enables single-chip dual-rail supervision without external op-amps or voltage dividers, reducing BOM count. |
| Automotive Body Control Units | Smart Energy Meters |
|
Use Scenario: AEC-Q100-compliant BCM module where VCC drops during cold-crank but auxiliary rail remains stable. IC Role / Device Role / Timing Role: Detects VCC undervoltage (3.20V threshold) and holds RESET high for 20ms after recovery to prevent firmware corruption. Use Value: Ensures deterministic boot sequence despite 12V battery sag to 6V, meeting ISO 16750-2 pulse 4 requirements. |
Use Scenario: Tamper-resistant electricity meter with backup supercapacitor that must retain RTC and memory during AC loss. IC Role / Device Role / Timing Role: Monitors main 3.3V rail and auxiliary 1.2V RTC supply; triggers reset if either dips below programmed thresholds. Use Value: Guarantees clean restart upon AC restoration without data loss, leveraging 20ms timeout to align with capacitor hold-up time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS32D2-T | Same 3.20V threshold and 20ms timeout, but includes manual reset (MR) input instead of RESET IN | Suitable where operator-initiated reset is required, not dual-rail monitoring | Select MAX6385XS32D2-T if system requires pushbutton reset; choose MAX6388XS32D2-T for second-rail voltage supervision |
| TLV803EB32DBZR | 3.2V threshold, 200ms timeout, open-drain active-low output, no auxiliary input | Lacks RESET IN capability and offers longer timeout; requires external pullup | Use TLV803EB32DBZR only in single-rail, cost-sensitive designs where 200ms reset hold is acceptable |
Compared with MAX6385XS32D2-T and TLV803EB32DBZR, MAX6388XS32D2-T uniquely delivers dual-supply monitoring in a 4-pin SC70 package with active-high push-pull output-enabling compact, low-component-count designs for portable and automotive applications requiring coordinated multi-rail reset.
Availability
MAX6388XS32D2-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6388XS32D2-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, with emphasis on low-power, high-reliability solutions.
The MAX6381–MAX6390 family was engineered specifically for microprocessor reset supervision in space- and power-constrained systems, supporting dual-voltage monitoring, ultra-low quiescent current, and AEC-Q100 qualification.
FAQ
What is the exact reset threshold voltage of the MAX6388XS32D2-T?
The MAX6388XS32D2-T has a factory-set VCC reset threshold of 3.20V nominal, with guaranteed tolerance of ±2.5% over the full operating temperature range (-40°C to +125°C). This value is confirmed in the Reset Thresholds table of the datasheet and applies specifically to the "32" suffix in the part number.
Does the MAX6388XS32D2-T support dual-voltage monitoring?
Yes, the MAX6388XS32D2-T supports dual-voltage monitoring via its dedicated RESET IN pin, which compares an external voltage to an internal +1.27V reference. When either VCC falls below 3.20V or the voltage at RESET IN drops below +1.27V, the active-high RESET output asserts - enabling coordinated supervision of two independent power rails.
What is the function of the RESET output on the MAX6388XS32D2-T?
The RESET output of the MAX6388XS32D2-T is an active-high push-pull driver. It goes high when VCC drops below 3.20V or when the RESET IN voltage falls below +1.27V, and remains high for a minimum of 20ms after both monitored voltages recover. No external pullup resistor is needed due to its push-pull architecture.
Can the MAX6388XS32D2-T operate down to 1.0V supply voltage?
Yes, the MAX6388XS32D2-T is fully specified to operate with VCC as low as 1.0V. Its RESET output remains guaranteed to be in the correct logic state (valid high/low) down to VCC = 1V, ensuring robust reset behavior during deep brownout conditions common in battery-depleted portable systems.
What package type does the MAX6388XS32D2-T use?
The MAX6388XS32D2-T is supplied in a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), designated by the "XS" prefix in the part number. This RoHS-compliant, lead-free package measures 2.0mm × 2.1mm × 0.95mm and is optimized for high-density portable PCB layouts.
MAX6388XS32D2-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:
- 3.2V, 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
MAX6388XS32D2-T FAQ
1.How can I place an order for MAX6388XS32D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS32D2-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 MAX6388XS32D2-T reliable?
The price and inventory of MAX6388XS32D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS32D2-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS32D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS32D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS32D2-T?
MAX6388XS32D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS32D2-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 MAX6388XS32D2-T?
For technical support, including MAX6388XS32D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS32D2-T requirements.
6.How does Aetrix verify that MAX6388XS32D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS32D2-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 MAX6388XS32D2-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS32D2-T?
All MAX6388XS32D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS32D2-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 MAX6388XS32D2-T part is unused and in its original packaging.
Return procedure for MAX6388XS32D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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