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Analog Devices Inc./Maxim Integrated MAX6388XS28D7-T
- Part No.:
- MAX6388XS28D7-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS28D7-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,409
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Product details
Overview
MAX6388XS28D7-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.80V 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 operates from 1.0V to 5.5V supply and consumes only 3μA at 1.8V, targeting power-critical embedded systems requiring reliable brownout detection.
For engineers reviewing the MAX6388XS28D7-T datasheet, MAX6388XS28D7-T pinout, MAX6388XS28D7-T application, or MAX6388XS28D7-T equivalent, key selection criteria include its 2.80V reset threshold accuracy, 1200ms timeout guarantee, dual-supply monitoring capability via RESET IN, and 4-pin SC70 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6388XS28D7-T integrates a precision voltage comparator monitoring VCC against a trimmed 2.80V threshold and a separate high-impedance RESET IN input referenced to an internal 1.27V bandgap. Reset assertion occurs when either voltage falls below its respective threshold, with independent timing control ensuring deterministic deassertion after recovery.
Its active-high push-pull RESET output drives logic-high during fault conditions and guarantees valid state down to VCC = 1.0V. The device supports manual reset initiation only in sibling variants (e.g., MAX6384–MAX6386/MAX6390); MAX6388 lacks MR but includes RESET IN - confirming its role as a dual-monitoring supervisor without user-triggered reset.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.80V ±2.5% (−40°C to +125°C); ensures stable brownout detection across automotive/industrial temperature range |
| VCC Reset Timeout | 1200ms min; guarantees μP remains held in reset long enough for full power stabilization after recovery |
| Supply Current | 3μA at 1.8V; enables multi-year battery life in portable equipment and IoT edge nodes |
| Operating Voltage | 1.0V to 5.5V; supports direct interface with 1.2V/1.8V/2.5V/3.3V/5V rails without level-shifting |
| RESET Output Type | Active-high push-pull; eliminates need for external pullup resistor and simplifies interface to μP reset input |
| Auxiliary Input | RESET IN with 1.27V reference; allows monitoring of second supply (e.g., I/O or core rail) using external resistor divider |
| Reset Propagation Delay | 4.5µs (RESET IN to RESET); enables fast response to secondary supply faults without compromising noise immunity |
Pinout & Package
MAX6388XS28D7-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, optimized for ultra-compact PCB layouts in portable and wearable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor; powers internal circuitry and sets comparator reference point |
| 2 | RESET | Active-high push-pull output; asserts high during VCC or RESET IN undervoltage; sinks/source current without external components |
| 3 | GND | Analog/digital ground reference; must be connected to system ground plane for accurate threshold sensing |
| 4 | RESET IN | High-impedance auxiliary input; compared to internal 1.27V reference; used with external resistor divider to set second reset threshold |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of main VCC and secondary supply (e.g., VCORE or I/O rail) via dedicated RESET IN path |
| Factory-trimmed reset threshold | 2.80V with ±2.5% tolerance over full industrial temperature range eliminates need for external calibration |
| Guaranteed operation down to 1.0V | RESET output remains logically valid even as VCC decays to 1.0V, preventing spurious release during power-down |
| Negative-going transient immunity | Rejects short-duration VCC glitches (e.g., <1µs at 100mV overdrive), reducing false resets in noisy environments |
| Low quiescent current | 3μA at 1.8V enables integration into always-on subsystems without impacting battery runtime |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Monitoring both 3.3V microcontroller supply and 5V sensor interface rail in programmable logic controller modules. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting active-high reset to MCU when either rail drops below threshold; 1200ms timeout ensures clean restart after brownout. Use Value: Prevents firmware corruption during intermittent 5V rail sag caused by relay switching transients while maintaining tight timing control. | Use Scenario: Supervising 12V-to-5V DC/DC converter output and 3.3V MCU core supply in body control module with CAN communication. IC Role / Device Role / Timing Role: Resets MCU via active-high signal if either supply fails; RESET IN monitors VCORE while VCC monitors 5V domain. Use Value: Enables fail-safe shutdown before CAN message corruption occurs due to undervoltage on critical power domains. |
| Medical Wearable Sensors | Smart Energy Meters |
Use Scenario: Battery-powered ECG patch requiring guaranteed reset during Li-ion discharge from 3.6V to 2.7V. IC Role / Device Role / Timing Role: Monitors main 3.3V rail (VCC) and backup real-time clock supply (RESET IN) to prevent data loss during battery swap. Use Value: 2.80V threshold aligns precisely with end-of-discharge voltage; 1200ms timeout allows EEPROM write completion before reset release. | Use Scenario: Dual-rail meter SoC with separate 3.3V digital and 1.8V analog supplies subjected to grid-induced sags. IC Role / Device Role / Timing Role: Uses RESET IN to supervise 1.8V analog rail while VCC monitors 3.3V digital domain; asserts reset on first fault. Use Value: Eliminates need for two discrete supervisors, reducing BOM count and PCB area in cost-sensitive utility meter designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6387XS28D7-T | Same 2.80V threshold, 1200ms timeout, and RESET IN input, but features open-drain active-low RESET output requiring external pullup | Suitable where system-level reset logic requires active-low signaling or wired-OR bus sharing | Select MAX6387XS28D7-T only if active-low reset polarity and external pullup are acceptable in target design |
| TLV809M28DBZR | 2.80V threshold, 140ms timeout, no auxiliary input, SOT-23-3 package; ±1.5% threshold accuracy at +25°C only | Limited to single-rail monitoring; shorter timeout insufficient for slow-ramping supplies or EEPROM writes | Choose TLV809M28DBZR only for cost-sensitive, single-supply applications where 140ms timeout and no RESET IN are acceptable |
Compared with MAX6388XS28D7-T, MAX6387XS28D7-T offers identical monitoring capability but demands external biasing for reset signaling, while TLV809M28DBZR sacrifices dual-supply support, timeout duration, and wide-temperature accuracy - making MAX6388XS28D7-T optimal for robust dual-rail systems requiring guaranteed 1200ms hold time and push-pull simplicity.
Availability
MAX6388XS28D7-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 across extended temperature ranges and long production lifecycles.
Supply support for MAX6388XS28D7-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, communications, and computing markets, emphasizing reliability, low power, and small form factor.
The MAX6381–MAX6390 family delivers single/dual low-voltage microprocessor supervisory circuits optimized for battery-powered, space-constrained, and thermally demanding applications where accurate, low-current reset functionality is critical.
FAQ
What is the exact reset threshold voltage of MAX6388XS28D7-T and how stable is it over temperature?
The MAX6388XS28D7-T has a factory-set reset threshold of 2.80V with ±2.5% accuracy over the full −40°C to +125°C operating range. This stability is achieved through laser trimming of on-chip resistors and a precision bandgap reference, ensuring consistent brownout detection without external calibration across automotive and industrial environments.
Does MAX6388XS28D7-T support manual reset functionality?
No, MAX6388XS28D7-T does not include a manual reset (MR) input. It belongs to the MAX6387/MAX6388/MAX6389 subgroup, which features only VCC and RESET IN monitoring with no MR pin. For manual reset capability, consider MAX6384–MAX6386 or MAX6390 variants instead.
What is the purpose of the RESET IN pin on MAX6388XS28D7-T and how is it configured?
The RESET IN pin on MAX6388XS28D7-T connects to an internal 1.27V comparator reference and is intended for monitoring a second voltage rail using an external resistor divider. By selecting R1 and R2 per the equation R1 = R2 × (VINTH/1.27V − 1), designers can set a custom reset threshold for auxiliary supplies like VCORE or I/O voltage.
Can MAX6388XS28D7-T operate reliably at VCC = 1.0V?
Yes, MAX6388XS28D7-T guarantees correct RESET output logic state down to VCC = 1.0V. Its internal circuitry remains functional and the active-high push-pull output maintains valid high/low levels throughout this range, enabling safe reset assertion during deep brownout or battery depletion scenarios.
What package type and dimensions does MAX6388XS28D7-T use?
MAX6388XS28D7-T uses a 4-pin SC70 package (outline 21-0098) measuring 1.3mm × 1.6mm × 0.95mm with a 0.65mm pin pitch. This RoHS-compliant, lead-free package is optimized for high-density PCB layouts in portable and automotive electronics where board space is constrained.
MAX6388XS28D7-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:
- 2.8V, 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
MAX6388XS28D7-T FAQ
1.How can I place an order for MAX6388XS28D7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS28D7-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 MAX6388XS28D7-T reliable?
The price and inventory of MAX6388XS28D7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS28D7-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS28D7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS28D7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS28D7-T?
MAX6388XS28D7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS28D7-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 MAX6388XS28D7-T?
For technical support, including MAX6388XS28D7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS28D7-T requirements.
6.How does Aetrix verify that MAX6388XS28D7-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS28D7-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 MAX6388XS28D7-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS28D7-T?
All MAX6388XS28D7-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS28D7-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 MAX6388XS28D7-T part is unused and in its original packaging.
Return procedure for MAX6388XS28D7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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