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Analog Devices Inc./Maxim Integrated MAX6388XS28D3-T
- Part No.:
- MAX6388XS28D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS28D3-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,994
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Product details
Overview
MAX6388XS28D3-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), 140ms 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, enabling reliable power-up/brownout detection in space-constrained battery-powered systems.
For engineers reviewing the MAX6388XS28D3-T datasheet, MAX6388XS28D3-T pinout, MAX6388XS28D3-T application, or MAX6388XS28D3-T equivalent, key selection criteria include its 2.80V reset threshold accuracy, 140ms VCC timeout, dual-supply monitoring capability via RESET IN, and compatibility with 4-pin SC70 layouts requiring minimal board area.
Technical Context
The MAX6388XS28D3-T integrates a precision voltage comparator for VCC monitoring and a separate +1.27V reference-based comparator for the auxiliary RESET IN pin, enabling independent reset assertion when either supply falls below its threshold. Its internal timer guarantees a minimum 140ms reset pulse width after VCC recovery.
It features an active-high push-pull RESET output that drives high during reset and low otherwise, guaranteed functional down to VCC = 1.0V. The RESET IN input accepts external resistor-divider networks to set user-defined thresholds, with ≤50nA leakage and 4.5μs propagation delay from RESET IN transition to RESET assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.80V ±2.5% (−40°C to +125°C); ensures reliable brownout detection for 2.8V/3.3V I/O rails |
| Reset Timeout | 140ms min; holds μP in reset long enough for power stabilization and clock lock |
| Supply Current | 3μA at 1.8V; enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Voltage | 1.0V to 5.5V; supports valid reset assertion even during deep brownout conditions |
| RESET Output Type | Active-high push-pull; eliminates need for external pullup resistor on reset line |
| RESET IN Threshold | +1.27V reference; allows precise secondary supply monitoring via resistor divider |
| Tempco | 60ppm/°C; maintains threshold stability across automotive temperature range |
Pinout & Package
MAX6388XS28D3-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 ultra-compact portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor; powers internal circuitry and sets reset threshold reference |
| 2 | RESET | Active-high push-pull output; asserts high during reset condition and deasserts low afterward |
| 3 | GND | Analog/digital ground reference; must be connected to system ground plane for stable comparator operation |
| 4 | RESET IN | Auxiliary voltage monitor input; compared against internal +1.27V reference to enable dual-rail supervision |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply monitoring | Simultaneous VCC and RESET IN supervision enables robust power sequencing in multi-rail SoC systems |
| Low-power operation | 3μA supply current at 1.8V extends battery life in always-on edge nodes without compromising supervision integrity |
| Precision reset threshold | ±2.5% tolerance over full industrial temperature range eliminates need for external calibration |
| Guaranteed reset validity | RESET output remains logic-valid down to VCC = 1.0V, ensuring deterministic behavior during deep undervoltage events |
| Negative transient immunity | Immune to short-duration VCC glitches (e.g., <1µs at 100mV overdrive), reducing false resets in noisy environments |
Applications
| Industrial PLC I/O Modules | Medical Wearable Sensors |
|---|---|
Use Scenario: Monitoring both 3.3V MCU core and 2.8V analog front-end supplies in compact field-deployable controllers. IC Role / Device Role / Timing Role: Dual-threshold supervisor asserting reset if either rail drops below specification during ESD transients or load switching. Use Value: Prevents firmware corruption by holding MCU in reset until both supplies stabilize post-disturbance, leveraging 140ms timeout and 2.80V/1.27V thresholds. | Use Scenario: Power supervision in Bluetooth LE-enabled glucose monitors powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Low-current (3μA) supervisor ensuring safe boot after cold-start or battery replacement, with RESET IN tracking sensor bias voltage. Use Value: Enables >5-year shelf life while guaranteeing reset assertion down to 1.0V VCC, critical for reliable first-power initialization. |
| Automotive Body Control Units | Smart Home Hub Power Management |
Use Scenario: Supervising 5V system rail and 2.8V CAN transceiver supply in AEC-Q100–qualified modules. IC Role / Device Role / Timing Role: Dual-input supervisor providing fault-tolerant reset signaling across temperature extremes (−40°C to +125°C). Use Value: Maintains ±2.5% threshold accuracy and 60ppm/°C tempco to prevent spurious resets during thermal cycling. | Use Scenario: Coordinating power-up sequence between 3.3V Wi-Fi SoC and 2.8V voice codec in always-listening smart speakers. IC Role / Device Role / Timing Role: Active-high push-pull RESET output directly drives SoC reset pin without external components. Use Value: Eliminates BOM cost and layout area of pullup resistors while ensuring clean, glitch-free reset assertion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6387XS28D3-T | Same 2.80V threshold and 140ms timeout, but open-drain active-low RESET output requiring external pullup | Suitable where system-level reset logic is active-low and shared across multiple devices | Select when interfacing with legacy μP reset inputs expecting active-low assertion and shared bus topology |
| TLV803EB28DBZR | 2.80V threshold, 140ms timeout, active-high push-pull, but no RESET IN input and higher 5.5μA ICC at 1.8V | Limited to single-rail supervision; lacks dual-voltage monitoring capability | Choose for cost-sensitive single-supply applications where auxiliary monitoring is unnecessary |
Compared with MAX6387XS28D3-T, MAX6388XS28D3-T eliminates external pullup requirements and simplifies routing; versus TLV803EB28DBZR, it adds critical dual-rail supervision for complex power architectures - making it optimal for next-generation multi-domain embedded systems.
Availability
MAX6388XS28D3-T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, medical wearable sensors, automotive body control units, and smart home hub power management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6388XS28D3-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 reliability and low-power operation.
The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy reset supervision for microprocessor-based systems operating under wide voltage and temperature ranges - specifically targeting battery-powered, space-constrained, and safety-critical embedded platforms.
FAQ
What is the exact reset threshold voltage of the MAX6388XS28D3-T and how stable is it over temperature?
The MAX6388XS28D3-T has a factory-set VCC reset threshold of 2.80V, specified with ±2.5% accuracy over the full −40°C to +125°C operating range. Its 60ppm/°C temperature coefficient ensures minimal drift across thermal extremes, making it suitable for automotive and industrial environments where supply stability is critical. This threshold is laser-trimmed during production and does not require external calibration.
Does the MAX6388XS28D3-T support monitoring of a second voltage rail, and how is it implemented?
Yes, the MAX6388XS28D3-T supports dual-voltage monitoring via its dedicated RESET IN pin, which compares an external voltage against an internal +1.27V reference. By connecting a resistor divider to RESET IN, users can set a custom threshold using the formula VINTH = 1.27V × (R1/R2 + 1). The device asserts reset if either VCC falls below 2.80V or the voltage at RESET IN drops below the configured threshold - enabling coordinated supervision of core and I/O supplies.
What is the function of the RESET output on the MAX6388XS28D3-T, and what are its drive capabilities?
The RESET output of the MAX6388XS28D3-T is an active-high push-pull driver, meaning it actively drives high during reset and low otherwise - eliminating the need for an external pullup resistor. It guarantees valid logic levels down to VCC = 1.0V and can sink 1.2mA at 2.5V (VOL ≤ 0.3V) or source 500µA at 2.5V (VOH ≥ 0.8×VCC), ensuring robust interface with modern low-voltage microcontrollers and FPGAs.
How does the MAX6388XS28D3-T handle short-duration power supply transients?
The MAX6388XS28D3-T incorporates built-in immunity to negative-going VCC transients (glitches), rejecting pulses up to several microseconds depending on overdrive magnitude - as shown in the "Maximum Transient Duration vs. Reset Comparator Overdrive" graph in the datasheet. For enhanced noise rejection, a 0.1µF ceramic capacitor placed close to the VCC pin further suppresses high-frequency disturbances, preventing false resets in electrically noisy environments like motor-driven industrial equipment.
Is the MAX6388XS28D3-T compatible with standard PCB footprints used for other members of the MAX6381–MAX6390 family?
Yes, the MAX6388XS28D3-T uses the 4-pin SC70 package (outline 21-0098), which shares identical mechanical dimensions and land pattern (90-0187) with other 4-pin variants in the MAX6381–MAX6390 family, including MAX6384, MAX6385, MAX6386, and MAX6390. This enables direct footprint reuse across designs requiring different reset thresholds, timeouts, or output configurations - simplifying inventory management and design flexibility.
MAX6388XS28D3-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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS28D3-T FAQ
1.How can I place an order for MAX6388XS28D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS28D3-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 MAX6388XS28D3-T reliable?
The price and inventory of MAX6388XS28D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS28D3-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS28D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS28D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS28D3-T?
MAX6388XS28D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS28D3-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 MAX6388XS28D3-T?
For technical support, including MAX6388XS28D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS28D3-T requirements.
6.How does Aetrix verify that MAX6388XS28D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS28D3-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 MAX6388XS28D3-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS28D3-T?
All MAX6388XS28D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS28D3-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 MAX6388XS28D3-T part is unused and in its original packaging.
Return procedure for MAX6388XS28D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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