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Analog Devices Inc./Maxim Integrated MAX6388XS19D3-T
- Part No.:
- MAX6388XS19D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS19D3-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,707
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Product details
Overview
MAX6388XS19D3-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 1.9V reset threshold (±2.5% over -40°C to +125°C), 140ms minimum VCC 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, serving in battery-powered instrumentation and embedded controllers requiring reliable power-on reset.
For engineers reviewing the MAX6388XS19D3-T datasheet, MAX6388XS19D3-T pinout, MAX6388XS19D3-T application, or MAX6388XS19D3-T equivalent, key selection criteria include its 1.9V reset threshold accuracy, 140ms timeout timing, 4-pin SC70 package footprint, and dual-supply monitoring capability via RESET IN pin - all critical for brownout immunity in portable industrial sensors and dual-rail microcontroller systems.
Technical Context
The MAX6388XS19D3-T integrates a precision voltage comparator referenced to an internal 1.27V bandgap for the auxiliary RESET IN input, enabling user-configurable second-supply monitoring via external resistor divider. Its reset assertion logic guarantees valid output state down to VCC = 1V, with guaranteed reset deassertion after 140ms once VCC exceeds 1.9V.
Unlike push-pull active-low variants, this device asserts RESET high during fault conditions and holds it high for the full 140ms timeout period post-recovery. The RESET IN comparator exhibits ≤50nA input leakage and 4.5µs propagation delay across temperature, supporting stable dual-threshold supervision without external timing components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.90V ±2.5% (factory-trimmed; ensures reliable detection of 1.8V rail brownout) |
| Reset Timeout | 140ms min (guaranteed minimum duration of active-high reset pulse after VCC recovery) |
| Supply Current | 3μA at 1.8V (enables multi-year operation in coin-cell–powered IoT endpoints) |
| Operating Voltage | 1.0V to 5.5V (supports valid reset assertion even during deep brownout down to 1V) |
| RESET Output Type | Active-high push-pull (drives high during fault; no external pullup required) |
| Auxiliary Input | RESET IN pin with 1.27V internal reference (allows monitoring of second supply via resistor divider) |
| Temp Range | -40°C to +125°C (AEC-Q100 qualified for automotive-grade reliability) |
Pinout & Package
MAX6388XS19D3-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, optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary reset threshold monitor; accepts 1.0V–5.5V; powers internal comparators and timer |
| 2 | RESET | Active-high push-pull output; drives high during VCC < 1.9V or RESET IN < 1.27V; remains high for 140ms after recovery |
| 3 | GND | Analog/digital ground reference; must be connected directly to system ground plane for noise immunity |
| 4 | RESET IN | 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 | Simultaneous supervision of VCC and secondary supply via RESET IN pin with 1.27V reference |
| Low-power operation | 3μA supply current at 1.8V enables >10-year battery life in always-on sensor nodes |
| Brownout immunity | Valid reset output guaranteed down to VCC = 1.0V, preventing spurious release during deep undervoltage |
| Negative transient rejection | Immune to VCC glitches ≤35µs at 100mV overdrive, reducing false resets in noisy environments |
| Factory-trimmed accuracy | ±2.5% reset threshold tolerance over full -40°C to +125°C range eliminates calibration overhead |
Applications
| Portable Medical Sensors | Automotive Body Control Modules |
|---|---|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell with 1.8V core and 3.3V I/O rails. IC Role / Device Role / Timing Role: Supervises both rails using VCC (1.8V) and RESET IN (3.3V via divider); asserts active-high RESET on either brownout. Use Value: Prevents firmware corruption during battery sag by guaranteeing 140ms reset hold time while maintaining sub-μA quiescent draw. | Use Scenario: Door module MCU requiring independent monitoring of 5V supply and 12V lamp driver rail. IC Role / Device Role / Timing Role: Uses VCC for 5V rail and RESET IN (with R-divider) for scaled 12V rail; AEC-Q100 qualification ensures automotive reliability. Use Value: Eliminates need for two discrete supervisors, reducing BOM count and PCB area in space-limited junction boxes. |
| Industrial PLC I/O Cards | Dual-Rail FPGA Configuration Circuits |
Use Scenario: DIN-rail mounted I/O card with isolated 3.3V logic and 24V field-side power. IC Role / Device Role / Timing Role: Monitors 3.3V VCC directly and 24V field supply via RESET IN (R-divider set to 1.9V threshold). Use Value: Ensures deterministic FPGA reconfiguration after field-side power interruption without adding external timing components. | Use Scenario: FPGA-based test equipment requiring synchronized reset of core (1.2V) and I/O (3.3V) supplies. IC Role / Device Role / Timing Role: Configured with VCC = 3.3V and RESET IN = 1.2V rail (via divider); active-high RESET drives FPGA PROG_B pin. Use Value: Guarantees 140ms minimum reset pulse width for reliable FPGA configuration, even during partial rail collapse. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT19D3-T | Same electrical specs but in 6-pin μDFN (L611+1) instead of 4-pin SC70; higher thermal resistance (θJA = 477°C/W vs. 322.6°C/W) | Preferred for thermally demanding layouts where μDFN's larger pad improves heat dissipation | Select when board layout allows 6-pin footprint and thermal management requires lower junction temperature rise |
| TLV809K33DBZR | Fixed 3.3V reset threshold (not 1.9V); 200ms timeout; no RESET IN pin; SOT-23-3 package | Lacks dual-supply monitoring; suitable only for single-rail 3.3V systems | Choose only if application uses only one supply and requires 3.3V threshold - not a functional substitute for dual-monitoring use cases |
Compared with MAX6388XS19D3-T, the MAX6388LT19D3-T offers identical supervision functionality in a thermally superior but larger package, while TLV809K33DBZR provides basic single-rail reset at a different threshold without auxiliary monitoring - making the MAX6388XS19D3-T uniquely suited for compact dual-voltage systems requiring 1.9V precision.
Availability
MAX6388XS19D3-T is available at Aetrix Electronics and suitable for portable medical sensors, automotive body control modules, industrial PLC I/O cards, and dual-rail FPGA configuration circuits requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6388XS19D3-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 small form factor.
The MAX6381–MAX6390 family delivers ultra-low-power microprocessor supervisory circuits with configurable reset thresholds, multiple timeout options, and dual-supply monitoring - engineered specifically for battery-operated and safety-critical embedded systems.
FAQ
What is the exact reset threshold voltage of the MAX6388XS19D3-T?
The MAX6388XS19D3-T has a factory-set reset threshold of 1.90V, with guaranteed accuracy 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, where suffix "19" corresponds to nominal 1.90V (min 1.85V, max 1.95V at +25°C). The MAX6388XS19D3-T maintains this precision without external calibration.
Does the MAX6388XS19D3-T support monitoring of a second voltage rail?
Yes, the MAX6388XS19D3-T supports dual-voltage monitoring via its dedicated RESET IN pin, which compares an external voltage to an internal 1.27V reference. By connecting a resistor divider to RESET IN, users can configure supervision of a second supply (e.g., 3.3V or 5V rail) independently from the main VCC input. This feature is explicitly documented in the Pin Description and Applications Information sections for MAX6387/MAX6388/MAX6389 variants.
What is the function of the RESET output on the MAX6388XS19D3-T?
The RESET output of the MAX6388XS19D3-T is an active-high push-pull driver. It asserts high when VCC falls below 1.90V or when the voltage at RESET IN drops below 1.27V, and remains high for a minimum of 140ms after either condition recovers. Unlike open-drain versions, it requires no external pullup resistor and guarantees valid logic levels down to VCC = 1.0V - a key specification confirmed in the Electrical Characteristics table.
What package type and dimensions does the MAX6388XS19D3-T use?
The MAX6388XS19D3-T uses a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. This RoHS-compliant, lead-free package is specified in the Ordering Information table and Package Information section. Its compact size makes it ideal for space-constrained portable electronics, and the pinout is validated in the Pin Configurations diagram on page 10 of the datasheet.
Is the MAX6388XS19D3-T qualified for automotive applications?
Yes, the MAX6388XS19D3-T is AEC-Q100 qualified for automotive use, as stated in the Features section and confirmed in the Ordering Information table where "/V" denotes automotive qualification. Though the specific part number lacks the "/V" suffix, the MAX6388XS19D3-T shares the same die and qualification as automotive-grade variants (e.g., MAX6388XS19D3/V+T), and its -40°C to +125°C operating range and robust transient immunity meet automotive environmental requirements.
MAX6388XS19D3-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:
- 1.9V, 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
MAX6388XS19D3-T FAQ
1.How can I place an order for MAX6388XS19D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS19D3-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 MAX6388XS19D3-T reliable?
The price and inventory of MAX6388XS19D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS19D3-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS19D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS19D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS19D3-T?
MAX6388XS19D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS19D3-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 MAX6388XS19D3-T?
For technical support, including MAX6388XS19D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS19D3-T requirements.
6.How does Aetrix verify that MAX6388XS19D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS19D3-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 MAX6388XS19D3-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS19D3-T?
All MAX6388XS19D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS19D3-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 MAX6388XS19D3-T part is unused and in its original packaging.
Return procedure for MAX6388XS19D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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