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Analog Devices Inc./Maxim Integrated MAX6388XS23D3-T
- Part No.:
- MAX6388XS23D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS23D3-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
MAX6388XS23D3-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.31V VCC reset threshold (±2.5% over -40°C to +125°C), 140ms 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 portable battery-powered equipment and dual-rail embedded systems.
For engineers reviewing the MAX6388XS23D3-T datasheet, MAX6388XS23D3-T pinout, MAX6388XS23D3-T application, or MAX6388XS23D3-T equivalent, key selection factors include its 4-pin SC70 package, 2.31V threshold accuracy, 140ms VCC reset delay, RESET IN comparator reference of +1.27V, and compatibility with dual-supply brownout detection in space-constrained industrial controllers.
Technical Context
The MAX6388XS23D3-T integrates a precision bandgap-based 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 ensures reset assertion remains active for ≥140ms after VCC or RESET IN recovers above their respective thresholds.
It features an active-high push-pull RESET output capable of sourcing 150µA at VCC ≥ 1.8V while maintaining VOH ≥ 0.8×VCC, and accepts MR-level logic on its manual reset input - though MR is not implemented in this variant (MAX6388 lacks MR per Selector Guide). The device operates across -40°C to +125°C with ±60ppm/°C reset threshold tempco.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.31V nominal, ±2.5% over -40°C to +125°C - ensures reliable brownout detection across automotive and industrial temperature ranges |
| Reset Timeout Period | 140ms minimum - provides sufficient hold time for μP initialization before release |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup resistor, simplifies interface to CMOS inputs |
| RESET IN Threshold | +1.27V reference - allows user-defined secondary reset point via resistor divider (e.g., 3.3V rail at 1.27V × (R1/R2 + 1)) |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion during deep brownout down to 1V VCC |
| Package | 4-pin SC70 (X4+1 outline) - 1.3mm × 1.6mm footprint ideal for wearables and compact modules |
Pinout & Package
MAX6388XS23D3-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 1.3mm × 1.6mm × 0.95mm, with thermal resistance θJA = 322.6°C/W on multilayer board.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary reset monitor rail - powers internal circuitry and triggers reset when falling below 2.31V |
| 2 | RESET | Active-high push-pull output - drives high during reset assertion; sinks current only during transition, no external pullup required |
| 3 | RESET IN | Auxiliary voltage monitor input - compared against +1.27V internal reference; reset asserts if voltage falls below threshold |
| 4 | GND | Analog/digital ground reference - must be connected directly to system ground plane for stable comparator operation |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail supervision | Simultaneous monitoring of VCC and external rail via RESET IN enables fail-safe startup in dual-voltage SoC systems |
| Low-power operation | 3μA supply current at 1.8V extends battery life in always-on edge nodes without compromising reset reliability |
| Precision threshold accuracy | ±2.5% over full temperature range eliminates need for external calibration in harsh environments |
| Guaranteed reset validity | RESET output remains logically valid down to VCC = 1V - prevents spurious release during deep undervoltage |
| Negative transient immunity | Immune to VCC glitches ≤35µs at 100mV overdrive - suppresses false resets from switching noise or ESD coupling |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Wearable ECG patch powered by CR2032 battery with 3.0V analog front-end and 1.8V MCU core. IC Role / Device Role / Timing Role: Supervises both 3.0V sensor rail (via RESET IN) and 1.8V core rail (via VCC), asserting active-high RESET until both stabilize. Use Value: Prevents firmware crash during battery voltage sag; 140ms timeout aligns with ADC settling and BLE radio wake-up sequence. |
Use Scenario: DIN-rail mounted PLC module with isolated 24V DC input converted to 5V and 3.3V rails. IC Role / Device Role / Timing Role: Monitors 5V main rail (VCC) and 3.3V logic rail (RESET IN) to detect cross-rail failure before FPGA configuration. Use Value: Dual-threshold detection avoids single-point failure; ±2.5% accuracy ensures consistent behavior across -40°C to +70°C operating range. |
| Automotive Body Control Units | Battery Management Systems |
|
Use Scenario: BCM sub-module using 5V microcontroller and 3.3V CAN transceiver, exposed to load-dump transients. IC Role / Device Role / Timing Role: Provides reset hold-off during cold-crank (VCC dip) and monitors transceiver supply independently via RESET IN. Use Value: 35µs negative transient immunity prevents false resets during engine start; AEC-Q100 qualified variants available. |
Use Scenario: Li-ion pack monitor IC powered from cell stack via LDO, requiring precise undervoltage lockout. IC Role / Device Role / Timing Role: Uses RESET IN to sense divided cell voltage; VCC tied to regulated 3.3V supply for stable timing reference. Use Value: Enables programmable UVLO threshold (e.g., 2.5V/cell) without trimming resistors; 140ms delay accommodates LDO startup overshoot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6387XS23D3-T | Same 2.31V threshold, 140ms timeout, and 4-pin SC70 package, but features open-drain active-low RESET output | Requires external pullup resistor; compatible with legacy systems using active-low reset logic | Select MAX6387XS23D3-T only if host MCU requires active-low reset assertion or shares reset bus with other open-drain devices |
| TLV809K23DBZR | 2.32V threshold, 140ms timeout, SOT-23-3 package; no RESET IN input; ±2% accuracy over -40°C to +125°C | Single-rail only; smaller footprint but lacks dual-supply monitoring capability | Choose TLV809K23DBZR for cost-sensitive, space-constrained designs where only VCC supervision is needed |
Compared with MAX6388XS23D3-T, MAX6387XS23D3-T offers identical supervision specs but different reset polarity and drive type, while TLV809K23DBZR reduces size and cost at the expense of auxiliary rail monitoring - making MAX6388XS23D3-T optimal for dual-voltage integrity assurance.
Availability
MAX6388XS23D3-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and battery management systems requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6388XS23D3-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, with emphasis on low-power, high-reliability solutions.
The MAX6381–MAX6390 family delivers ultra-low-quiescent-current microprocessor supervisors for space- and power-constrained embedded systems requiring dual-rail monitoring and AEC-Q100 compliance options.
FAQ
What is the exact reset threshold voltage of MAX6388XS23D3-T and how stable is it over temperature?
The MAX6388XS23D3-T has a factory-set VCC reset threshold of 2.31V (nominal), with guaranteed accuracy of ±2.5% over the full operating range of -40°C to +125°C. Its tempco is ±60ppm/°C, meaning threshold drift is less than 15mV across the entire temperature span - sufficient for robust brownout detection in automotive and industrial environments without calibration.
Does MAX6388XS23D3-T support manual reset functionality?
No, MAX6388XS23D3-T does not include a manual reset (MR) input. Per the Selector Guide and Pin Configurations, MR is only present on MAX6384/MAX6385/MAX6386/MAX6390 variants. MAX6388XS23D3-T is configured exclusively for automatic supervision of VCC and RESET IN rails, with no provision for external reset initiation.
How is the auxiliary RESET IN input used in MAX6388XS23D3-T?
In MAX6388XS23D3-T, the RESET IN pin connects to an internal +1.27V comparator reference. To monitor a second voltage rail (e.g., 3.3V), a resistor divider scales that rail to 1.27V at RESET IN. Reset asserts if either VCC drops below 2.31V or the divided RESET IN voltage falls below 1.27V - enabling coordinated power sequencing in dual-supply systems.
What package type and dimensions does MAX6388XS23D3-T use?
MAX6388XS23D3-T uses a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 1.3mm × 1.6mm × 0.95mm. It is RoHS-compliant (+T suffix), with thermal resistance θJA = 322.6°C/W on a multilayer PCB - optimized for high-density layouts in portable and automotive electronics.
Can MAX6388XS23D3-T operate reliably at very low supply voltages?
Yes, MAX6388XS23D3-T guarantees correct RESET output logic state down to VCC = 1.0V, and operates across 1.0V to 5.5V. Its 3μA supply current at 1.8V and push-pull active-high output ensure deterministic reset behavior even during deep brownout conditions common in battery-depleted systems.
MAX6388XS23D3-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.31V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS23D3-T FAQ
1.How can I place an order for MAX6388XS23D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS23D3-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 MAX6388XS23D3-T reliable?
The price and inventory of MAX6388XS23D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS23D3-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS23D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS23D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS23D3-T?
MAX6388XS23D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS23D3-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 MAX6388XS23D3-T?
For technical support, including MAX6388XS23D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS23D3-T requirements.
6.How does Aetrix verify that MAX6388XS23D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS23D3-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 MAX6388XS23D3-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS23D3-T?
All MAX6388XS23D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS23D3-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 MAX6388XS23D3-T part is unused and in its original packaging.
Return procedure for MAX6388XS23D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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