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Analog Devices Inc./Maxim Integrated MAX6388XS22D5-T
- Part No.:
- MAX6388XS22D5-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS22D5-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,098
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Product details
Overview
MAX6388XS22D5-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.19V VCC reset threshold (±2.5% over -40°C to +125°C), 280ms 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, targeting power-sensitive embedded systems requiring reliable brownout detection.
For engineers reviewing the MAX6388XS22D5-T datasheet, MAX6388XS22D5-T pinout, MAX6388XS22D5-T application, or MAX6388XS22D5-T equivalent, key selection criteria include its 2.19V reset threshold accuracy, 280ms VCC timeout, 4-pin SC70 package, dual-supply monitoring capability via RESET IN, and guaranteed reset validity down to VCC = 1V.
Technical Context
The MAX6388XS22D5-T integrates a precision voltage comparator for VCC monitoring and a separate +1.27V reference-based comparator for the RESET IN pin, enabling independent supervision of two power rails. Its internal timer ensures reset assertion for ≥280ms after VCC or RESET IN recovers above their respective thresholds.
It features an active-high push-pull RESET output that transitions high during fault conditions and remains asserted for the full timeout period. The device guarantees correct logic state of RESET down to VCC = 1V and provides immunity to negative-going VCC transients up to 35µs at 100mV overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.19V (nominal), ±2.5% over -40°C to +125°C - ensures accurate brownout detection across automotive/industrial temperature range |
| Reset Timeout Period | 280ms (min) - holds processor in reset long enough to stabilize dual supplies before release |
| Supply Current | 3μA at VCC = 1.8V - enables use in always-on battery-powered applications without significant drain |
| Operating Voltage Range | 1.0V to 5.5V - supports operation during deep brownout and compatibility with 1.2V–5V logic domains |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup resistor and drives high-impedance loads directly |
| RESET IN Threshold | +1.27V (±2.5% over temp) - allows user-defined secondary reset point via external resistor divider |
| Reset Propagation Delay | 4.5µs (RESET IN to RESET) - enables fast response to auxiliary rail faults without compromising noise immunity |
Pinout & Package
MAX6388XS22D5-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 node; powers internal circuitry and sets fixed reset threshold |
| 2 | RESET | Active-high push-pull output; asserts high during VCC or RESET IN undervoltage and holds for 280ms post-recovery |
| 3 | GND | Reference ground for all internal comparators, timers, and output drivers |
| 4 | RESET IN | Auxiliary high-impedance input monitored against +1.27V reference; enables dual-rail supervision without additional ICs |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of VCC (2.19V threshold) and external rail via RESET IN (+1.27V reference), eliminating need for second supervisor IC |
| Guaranteed reset validity down to VCC = 1V | Ensures deterministic processor reset behavior even during severe brownout, preventing undefined MCU states |
| Negative-going transient immunity | Withstands VCC glitches ≤35µs wide at 100mV overdrive - reduces false resets in noisy power environments |
| Low quiescent current | 3μA at 1.8V enables >10-year battery life in coin-cell–powered IoT sensors and wearables |
| Factory-trimmed threshold accuracy | ±2.5% over full industrial temperature range (-40°C to +125°C) removes need for external calibration |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
|
Use Scenario: Monitoring both 3.3V microcontroller core supply and 5V sensor interface rail in harsh EMI environments. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting active-high RESET to prevent firmware corruption during simultaneous rail collapse. Use Value: 280ms timeout ensures stable power-up sequencing; RESET IN comparator eliminates discrete resistor-divider error accumulation. |
Use Scenario: Supervising 12V-to-5V DC/DC converter output and 3.3V MCU domain in body control module with AEC-Q100 requirements. IC Role / Device Role / Timing Role: Fault detector triggering system-level reset when either rail drops below safe operating level. Use Value: ±2.5% threshold accuracy over -40°C to +125°C meets automotive qualification; 4-pin SC70 saves board area vs. dual discrete supervisors. |
| Medical Portable Diagnostic Devices | Battery-Powered Wireless Sensors |
|
Use Scenario: Ensuring safe boot of ARM Cortex-M4 MCU powered by Li-ion battery (2.8V–4.2V) and regulated 1.8V analog front-end supply. IC Role / Device Role / Timing Role: Low-power supervisor maintaining valid reset signal while minimizing standby current draw. Use Value: 3μA supply current at 1.8V extends single-charge runtime; active-high push-pull output interfaces directly with MCU's active-high reset pin. |
Use Scenario: Monitoring coin-cell (1.8V–3.0V) supply and 2.5V RF transceiver rail in BLE beacon with strict size constraints. IC Role / Device Role / Timing Role: Space-optimized dual-supply monitor enabling compact 2-layer PCB design. Use Value: 4-pin SC70 footprint (2.0mm × 2.1mm) reduces layout area by 60% vs. 6-pin μDFN alternatives; RESET IN allows precise 2.5V rail threshold setting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT22D5-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) | Better suited for thermally demanding environments where μDFN's larger copper slug improves heat dissipation | Select when board layout allows larger footprint and thermal management requires lower junction temperature rise |
| MAX6387XS22D5-T | Identical package and timing, but open-drain active-low RESET output (requires external pullup) and same RESET IN functionality | Required where host system uses active-low reset inputs or needs wired-OR reset bus sharing | Choose when interfacing with legacy MCUs mandating active-low reset or implementing multi-source reset arbitration |
Compared with MAX6388XS22D5-T, the LT version trades smaller footprint for better thermal performance, while the MAX6387 variant replaces push-pull drive with open-drain for flexible reset bus topology - neither offers pin compatibility, but both share identical reset thresholds, timeout, and dual-monitoring capability.
Availability
MAX6388XS22D5-T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, medical portable diagnostic devices, and battery-powered wireless sensors requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6388XS22D5-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 power management, sensing, and interface applications in industrial, automotive, and medical markets.
The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy voltage supervision for microprocessor-based systems where reliability under brownout, thermal stress, and EMI is critical.
FAQ
What is the exact reset threshold voltage of MAX6388XS22D5-T and how stable is it over temperature?
The MAX6388XS22D5-T has a factory-set nominal VCC reset threshold of 2.19V, with guaranteed accuracy of ±2.5% over the full industrial temperature range (-40°C to +125°C). This stability is achieved through laser-trimmed on-chip resistors and a precision bandgap reference, ensuring consistent brownout detection without external calibration. The MAX6388XS22D5-T maintains this tolerance across all operating conditions specified in the datasheet.
Does MAX6388XS22D5-T support monitoring of two independent power rails?
Yes, the MAX6388XS22D5-T supports dual-rail monitoring: VCC is compared against its fixed 2.19V threshold, while the RESET IN pin connects to an internal +1.27V reference, allowing user-defined secondary threshold via external resistor divider. Reset asserts if either rail falls below its threshold, and the 280ms timeout applies to recovery from either fault condition. This dual-monitoring capability is intrinsic to the MAX6388XS22D5-T design.
What is the function of the RESET output on MAX6388XS22D5-T and how does it behave during power failure?
The RESET output of the MAX6388XS22D5-T is an active-high push-pull driver. During normal operation (VCC ≥ 2.19V and RESET IN ≥ 1.27V), RESET remains low. When either voltage drops below its threshold, RESET immediately transitions high and stays high for ≥280ms after both voltages recover. This behavior ensures the connected microprocessor remains held in reset until both supplies are fully stabilized. The MAX6388XS22D5-T guarantees correct RESET logic state down to VCC = 1V.
Can MAX6388XS22D5-T be used in automotive applications?
The MAX6388XS22D5-T is not automotive-qualified; it is rated for -40°C to +125°C operation but lacks AEC-Q100 certification. For automotive use, select the /V suffix variant (e.g., MAX6388XS22D5/V+T), which undergoes additional stress testing and screening per AEC-Q100 Rev G. The MAX6388XS22D5-T itself is intended for industrial and commercial applications where extended temperature range is required but formal automotive qualification is not mandated.
What package type and dimensions does MAX6388XS22D5-T use?
The MAX6388XS22D5-T is supplied in a lead-free, RoHS-compliant 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. This compact footprint enables high-density PCB layouts in space-constrained applications such as portable medical devices and wireless sensors. The MAX6388XS22D5-T's SC70 package is distinct from the 6-pin μDFN option used in LT-suffixed variants.
MAX6388XS22D5-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:
- 2.19V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 280ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS22D5-T FAQ
1.How can I place an order for MAX6388XS22D5-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS22D5-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 MAX6388XS22D5-T reliable?
The price and inventory of MAX6388XS22D5-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS22D5-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS22D5-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS22D5-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS22D5-T?
MAX6388XS22D5-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS22D5-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 MAX6388XS22D5-T?
For technical support, including MAX6388XS22D5-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS22D5-T requirements.
6.How does Aetrix verify that MAX6388XS22D5-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS22D5-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 MAX6388XS22D5-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS22D5-T?
All MAX6388XS22D5-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS22D5-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 MAX6388XS22D5-T part is unused and in its original packaging.
Return procedure for MAX6388XS22D5-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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