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Analog Devices Inc./Maxim Integrated MAX6388XS28D1-T
- Part No.:
- MAX6388XS28D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS28D1-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,353
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Product details
Overview
MAX6388XS28D1-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), 1ms 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 use in battery-powered systems requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6388XS28D1-T datasheet, MAX6388XS28D1-T pinout, MAX6388XS28D1-T application, or MAX6388XS28D1-T equivalent, key selection criteria include its 4-pin SC70 package, guaranteed reset validity down to VCC = 1V, ±2.5% threshold accuracy over temperature, 1ms reset timeout, and dual-monitoring capability via RESET IN comparator referenced to 1.27V.
Technical Context
The MAX6388XS28D1-T integrates a precision bandgap reference and comparator to monitor VCC against a fixed 2.80V threshold while simultaneously comparing an external voltage at RESET IN to an internal 1.27V reference. Reset assertion occurs if either monitored voltage falls below its respective threshold, with independent timing control ensuring deterministic behavior during power transients.
Its active-high push-pull RESET output drives high during fault conditions and deasserts cleanly after the 1ms timeout, eliminating need for external pullup resistors. The RESET IN input accepts high-impedance voltage-divider networks for user-defined secondary thresholds, with leakage current limited to ±50nA and propagation delay of 4.5µs across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.80V nominal, ±2.5% over -40°C to +125°C - ensures accurate brownout detection across automotive/industrial temperature range |
| Reset Timeout Period | 1ms minimum - provides sufficient hold time for microprocessor initialization without excessive system startup delay |
| RESET Output Type | Active-high push-pull - eliminates external pullup resistor requirement and guarantees logic-high state during reset |
| RESET IN Threshold | 1.27V internal reference - enables precise secondary voltage monitoring using external resistor divider |
| Supply Current | 3μA at VCC = 1.8V - supports ultra-low-power operation in energy-constrained portable applications |
| Operating Voltage Range | 1.0V to 5.5V - allows compatibility with core voltages from sub-1.2V logic up to 5V legacy systems |
| Reset Propagation Delay | 35µs for VCC falling edge - ensures fast response to rapid supply collapse while rejecting short noise spikes |
Pinout & Package
MAX6388XS28D1-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 space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor - powers internal circuitry and triggers reset when falling below 2.80V |
| 2 | RESET | Active-high push-pull output - asserts high during reset condition and remains high for full 1ms timeout period |
| 3 | GND | Analog/digital ground reference - must be connected to system ground plane for stable threshold reference |
| 4 | RESET IN | Auxiliary voltage monitor input - compares external voltage to 1.27V reference; reset asserts if input falls below threshold |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC (2.80V) and RESET IN (1.27V reference) supervision enables robust dual-rail power integrity checking |
| Guaranteed reset validity down to VCC = 1V | Ensures correct logic state on RESET output even during deep brownout, preventing spurious processor release |
| Negative-going VCC transient immunity | Rejects short-duration supply glitches (e.g., <1µs at 100mV overdrive) without false triggering |
| Low-temperature coefficient threshold | 60ppm/°C tempco maintains ±2.5% accuracy across -40°C to +125°C, critical for automotive reliability |
| High-impedance RESET IN input | ±50nA leakage enables use of megaohm-level resistor dividers without significant threshold error |
Applications
| Power-On Reset for Low-Voltage Microcontrollers | Dual-Rail Power Monitoring in FPGA Systems |
|---|---|
Use Scenario: Ensuring clean boot sequence for ARM Cortex-M0+ MCU operating at 1.8V core and 3.3V I/O rails. IC Role / Device Role / Timing Role: Primary VCC supervisor for 1.8V rail with 2.80V threshold; RESET IN monitors 3.3V I/O supply via resistor divider. Use Value: Prevents code execution before both rails stabilize, leveraging 1ms timeout and guaranteed reset validity down to 1V. | Use Scenario: Validating simultaneous power-up of FPGA core (1.0V) and auxiliary (2.5V) supplies. IC Role / Device Role / Timing Role: VCC monitors 1.0V core rail; RESET IN configured for 2.5V threshold using R1/R2 divider per datasheet equation. Use Value: Single-chip dual monitoring eliminates need for two discrete supervisors, reducing BOM count and board area. |
| Battery-Powered IoT Sensor Node | Automotive Body Control Module |
Use Scenario: Maintaining reliable reset during lithium coin-cell discharge from 3.0V to 2.0V. IC Role / Device Role / Timing Role: Supervises main 2.8V regulated supply; RESET IN unused or tied to GND. Use Value: 3μA quiescent current extends battery life; ±2.5% threshold accuracy prevents premature reset during gradual voltage decay. | Use Scenario: Monitoring 5V infotainment rail and 3.3V microcontroller supply in AEC-Q100-compliant design. IC Role / Device Role / Timing Role: VCC monitors 5V rail; RESET IN monitors 3.3V rail via precision divider; operates over -40°C to +125°C. Use Value: Dual monitoring with automotive-grade tempco and qualification ensures functional safety compliance without additional components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT28D1-T | Same electrical specs but in 6-pin μDFN package (167.7mW power dissipation vs. 245mW for SC70) | Preferred for thermally constrained designs requiring lower θJA (477°C/W vs. 322.6°C/W) | Select LT version when thermal performance outweighs board space savings of SC70 |
| MAX6387XS28D1-T | Identical pinout and threshold, but open-drain RESET output requiring external pullup resistor | Suitable where bus-sharing or wired-OR reset topology is required | Choose XS28D1-T variant only if active-high push-pull is mandatory for direct MCU interface |
Compared with MAX6388LT28D1-T, the MAX6388XS28D1-T offers superior board-area efficiency in 4-pin SC70 while maintaining identical reset functionality; versus MAX6387XS28D1-T, it eliminates external pullup requirements and simplifies layout, though sacrificing bus-sharing capability.
Availability
MAX6388XS28D1-T is available at Aetrix Electronics and suitable for battery-powered equipment, dual-voltage systems, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for MAX6388XS28D1-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.
The MAX6381–MAX6390 family delivers low-power, high-accuracy voltage supervision for microprocessor systems, emphasizing dual-rail monitoring, ultra-low quiescent current, and AEC-Q100 qualification for harsh environments.
FAQ
What is the exact reset threshold voltage of MAX6388XS28D1-T and how does it vary with temperature?
The MAX6388XS28D1-T has a factory-set nominal VCC reset threshold of 2.80V, with guaranteed tolerance of ±2.5% over the full operating temperature range of -40°C to +125°C. This corresponds to a minimum threshold of 2.73V and maximum of 2.87V at any temperature within that range, supported by a 60ppm/°C tempco that ensures stability across thermal gradients.
Does MAX6388XS28D1-T support monitoring of a second voltage, and how is it implemented?
Yes, MAX6388XS28D1-T includes a dedicated RESET IN terminal that compares an external voltage to an internal 1.27V reference. To set a custom threshold, connect a resistor divider between VCC and GND with the midpoint fed to RESET IN; the threshold is calculated as VINTH = 1.27V × (R1/R2 + 1). The MAX6388XS28D1-T's ±50nA input leakage ensures minimal error with standard resistor values.
What is the function of the RESET output on MAX6388XS28D1-T and what load can it drive?
The RESET output of MAX6388XS28D1-T is an active-high push-pull driver that asserts high during reset conditions and remains high for the full 1ms timeout period. It can sink 3.2mA at VCC ≥ 4.5V (VOL ≤ 0.4V) and source 800µA at VCC ≥ 4.5V (VOH ≥ 0.8×VCC), enabling direct connection to most microcontroller reset inputs without external components.
How does MAX6388XS28D1-T handle power supply transients, and what protection does it offer?
MAX6388XS28D1-T incorporates negative-going VCC transient immunity, rejecting short-duration supply glitches based on comparator overdrive magnitude. For example, a 100mV overdrive (VTH – VCC) allows transients up to ~350ns without false reset assertion. Adding a 0.1µF ceramic capacitor close to the VCC pin further enhances immunity to high-frequency noise and ripple.
Is MAX6388XS28D1-T qualified for automotive applications, and what package options are available?
MAX6388XS28D1-T is not explicitly marked with /V suffix and therefore is not AEC-Q100 qualified per the ordering information table. It is offered exclusively in the 4-pin SC70 package (X4+1 outline); no μDFN or automotive-grade variants exist for this specific suffix combination. For automotive use, engineers should select /V-trim versions like MAX6388XS28D1/V+T.
MAX6388XS28D1-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:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS28D1-T FAQ
1.How can I place an order for MAX6388XS28D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS28D1-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 MAX6388XS28D1-T reliable?
The price and inventory of MAX6388XS28D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS28D1-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS28D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS28D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS28D1-T?
MAX6388XS28D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS28D1-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 MAX6388XS28D1-T?
For technical support, including MAX6388XS28D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS28D1-T requirements.
6.How does Aetrix verify that MAX6388XS28D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS28D1-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 MAX6388XS28D1-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS28D1-T?
All MAX6388XS28D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS28D1-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 MAX6388XS28D1-T part is unused and in its original packaging.
Return procedure for MAX6388XS28D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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