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Analog Devices Inc./Maxim Integrated MAX6388XS20D7-T
- Part No.:
- MAX6388XS20D7-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS20D7-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,186
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Product details
Overview
MAX6388XS20D7-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.0V 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 consumes only 3μA at +1.8V and operates down to VCC = 1.0V, used in battery-powered controllers and intelligent instruments requiring reliable brownout detection.
For engineers reviewing the MAX6388XS20D7-T datasheet, MAX6388XS20D7-T pinout, MAX6388XS20D7-T application, or MAX6388XS20D7-T equivalent, key selection criteria include its 2.0V reset threshold accuracy, 1200ms reset timeout, 4-pin SC70 package, auxiliary voltage monitoring capability, and guaranteed reset validity down to 1V supply.
Technical Context
The MAX6388XS20D7-T integrates a precision bandgap reference and comparator to monitor VCC against a fixed 2.0V threshold while simultaneously accepting an external voltage via RESET IN, which is compared to an internal 1.27V reference. Its reset assertion logic triggers on either VCC < 2.0V or RESET IN < 1.27V, with independent timing control.
It features a dedicated active-high push-pull RESET output that drives high during reset assertion and guarantees correct logic state down to VCC = 1.0V. The device includes no manual reset (MR) input-unlike MAX6384–MAX6386/MAX6390-but supports resistor-divider configuration at RESET IN to set custom secondary thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.00V ±2.5% (−40°C to +125°C); ensures reliable detection of 2.0V supply brownout |
| VCC Reset Timeout | 1200ms minimum; holds reset active long enough to stabilize power after recovery |
| Supply Current | 3μA at +1.8V; enables multi-year operation in coin-cell–powered systems |
| Operating Voltage Range | 1.0V to 5.5V; supports valid reset assertion even during deep undervoltage conditions |
| RESET IN Threshold | 1.27V ±2.5% (−40°C to +125°C); allows precise secondary voltage monitoring via external divider |
| Output Type | Active-high push-pull; eliminates need for external pullup and drives high-impedance loads directly |
| Package | 4-pin SC70 (X4+1 outline); 1.6mm × 1.6mm footprint for space-constrained PCBs |
Pinout & Package
MAX6388XS20D7-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), optimized for compact portable designs. Pin 1 is VCC, Pin 2 is RESET, Pin 3 is GND, and Pin 4 is RESET IN.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Primary supply input and monitored voltage rail | Power source and main reset trigger; must be decoupled with 0.1μF capacitor near pin |
| 2 - RESET | Active-high push-pull reset output | Drives high during reset assertion; compatible with standard μP reset inputs without pullup |
| 3 - GND | Ground reference | Common return path for all internal circuits and external bypass capacitors |
| 4 - RESET IN | Auxiliary voltage monitor input | High-impedance node compared to 1.27V reference; accepts resistor-divider for user-defined second threshold |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Monitors both VCC (2.0V threshold) and external rail via RESET IN (1.27V reference), enabling dual-rail systems like core/I/O supplies |
| Ultra-low quiescent current | 3μA at 1.8V ensures minimal battery drain in always-on monitoring applications |
| Guaranteed reset validity to 1.0V | Ensures deterministic μP reset behavior even during severe brownout, preventing erratic startup |
| Negative-going transient immunity | Rejects short VCC glitches (e.g., ≤10µs at 100mV overdrive), reducing false resets in noisy environments |
| Factory-trimmed accuracy | ±2.5% reset threshold tolerance over full temperature range eliminates need for external calibration |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered glucose meters and pulse oximeters require fail-safe startup and brownout recovery without firmware intervention. IC Role / Device Role / Timing Role: Supervises main 3.3V supply and backup 1.8V sensor rail via RESET IN; asserts active-high RESET for 1200ms after any fault. Use Value: Prevents corrupted ADC readings or EEPROM writes during low-battery transitions, meeting IEC 60601-1 reliability requirements. |
Use Scenario: Modular PLC backplanes with separate 5V logic and 24V field I/O supplies demand independent voltage monitoring. IC Role / Device Role / Timing Role: Uses VCC for 5V logic rail and RESET IN (with R-divider) to monitor 24V-to-5V converter output at 2.0V equivalent. Use Value: Enables single-chip dual-supply supervision without external comparators, reducing BOM count and board area by >30%. |
| Automotive Body Control Units | Smart Energy Meters |
|
Use Scenario: BCMs powered from vehicle battery (9V–16V) with internal 3.3V LDO must survive cold-crank transients and restart reliably. IC Role / Device Role / Timing Role: Monitors 3.3V LDO output (VCC) and detects LDO dropout via RESET IN tied to feedback node. Use Value: Provides AEC-Q100–qualified supervision (via /V variant) with 1200ms timeout to ensure MCU completes safe shutdown before power loss. |
Use Scenario: Meters with real-time clocks and nonvolatile memory must retain data integrity during grid sags and outages. IC Role / Device Role / Timing Role: Supervises 3.3V system rail (VCC) and supercapacitor backup voltage (via RESET IN) to initiate graceful save routines. Use Value: Guarantees 1200ms reset hold time for complete flash write completion, eliminating meter data corruption during brownout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT20D7-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 dense layouts where μDFN's exposed pad improves heat dissipation | Select when board layout allows larger footprint and thermal performance outweighs size constraints |
| MAX6385XS20D7-T | Shares 4-pin SC70 package and 2.0V/1200ms specs but adds manual reset (MR) input; lacks RESET IN | Preferred where operator-initiated reset is required, but dual-voltage monitoring is unnecessary | Choose if system requires pushbutton reset functionality and does not need auxiliary voltage supervision |
Compared with MAX6388XS20D7-T, MAX6388LT20D7-T offers identical supervision functionality in a thermally enhanced μDFN package, while MAX6385XS20D7-T trades RESET IN capability for MR input-making each suitable for distinct system-level supervision architectures.
Availability
MAX6388XS20D7-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6388XS20D7-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, emphasizing low power, high reliability, and small form factor.
The MAX6381–MAX6390 family delivers single/dual low-voltage μP reset circuits targeting battery-powered and safety-critical systems where supply monitoring accuracy, ultra-low current, and compact packaging are essential.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6388XS20D7-T?
The MAX6388XS20D7-T has a factory-set reset threshold of 2.00V with ±2.5% tolerance over the full operating temperature range of −40°C to +125°C. This value is specified in the Reset Thresholds table of the datasheet (suffix "20"), and the tolerance ensures robust detection of 2.0V supply faults without false triggering due to temperature drift or process variation. The MAX6388XS20D7-T maintains this accuracy without external calibration.
Does MAX6388XS20D7-T support manual reset functionality?
No, the MAX6388XS20D7-T does not include a manual reset (MR) input. Per the Selector Guide and Pin Configurations, MR is present only on MAX6384/MAX6385/MAX6386/MAX6390 variants-not on MAX6387/MAX6388/MAX6389. The MAX6388XS20D7-T provides only VCC and RESET IN supervision, with reset assertion triggered solely by voltage faults. For manual reset capability, consider MAX6385XS20D7-T instead.
How is the auxiliary RESET IN input used in MAX6388XS20D7-T?
The RESET IN pin on MAX6388XS20D7-T connects to an internal 1.27V comparator reference. To monitor a second voltage rail, a resistor divider is placed between that rail and ground, with the midpoint fed to RESET IN. The threshold is calculated as VTH = 1.27V × (R1/R2 + 1). The MAX6388XS20D7-T asserts reset if either VCC falls below 2.0V or the divided voltage at RESET IN drops below 1.27V-enabling true dual-supply supervision.
What package type and dimensions does MAX6388XS20D7-T use?
The MAX6388XS20D7-T uses a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 1.6mm × 1.6mm × 0.9mm with a 0.65mm pitch. This RoHS-compliant, lead-free package is designated by code X4+1 and is optimized for high-density portable PCBs. Its thermal resistance is θJA = 322.6°C/W on a multilayer board, per JEDEC JESD51-7 test conditions.
Is MAX6388XS20D7-T qualified for automotive applications?
The base MAX6388XS20D7-T is not automotive-qualified; however, the /V variant (e.g., MAX6388XS20D7/V+T) is AEC-Q100 qualified for Grade 1 (−40°C to +125°C). The datasheet explicitly states "/V denotes an automotive qualified part" in the Ordering Information section. For automotive body control or infotainment systems, specify the /V suffix to ensure qualification-MAX6388XS20D7-T alone meets industrial specs only.
MAX6388XS20D7-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:
- 2V, 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
MAX6388XS20D7-T FAQ
1.How can I place an order for MAX6388XS20D7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS20D7-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 MAX6388XS20D7-T reliable?
The price and inventory of MAX6388XS20D7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS20D7-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS20D7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS20D7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS20D7-T?
MAX6388XS20D7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS20D7-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 MAX6388XS20D7-T?
For technical support, including MAX6388XS20D7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS20D7-T requirements.
6.How does Aetrix verify that MAX6388XS20D7-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS20D7-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 MAX6388XS20D7-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS20D7-T?
All MAX6388XS20D7-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS20D7-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 MAX6388XS20D7-T part is unused and in its original packaging.
Return procedure for MAX6388XS20D7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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