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Analog Devices Inc./Maxim Integrated MAX6390XS17D4+T
- Part No.:
- MAX6390XS17D4+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6390XS17D4+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:5,594
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Product details
Overview
MAX6390XS17D4+T from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 1.67V VCC reset threshold (±2.5% over -40°C to +125°C), 1120ms VCC reset timeout, and 140ms manual reset timeout. It monitors single-supply voltage in battery-powered embedded systems where reliable power-on reset and brownout protection are critical.
For engineers reviewing the MAX6390XS17D4+T datasheet, MAX6390XS17D4+T pinout, MAX6390XS17D4+T application, or MAX6390XS17D4+T equivalent, key selection considerations include its 1.67V threshold accuracy, dual timeout timing (1120ms/140ms), 4-pin SC70 package, 3μA supply current at 1.8V, and guaranteed reset validity down to VCC = 1V.
Technical Context
The MAX6390XS17D4+T implements a precision bandgap-based voltage comparator for VCC monitoring and a digital timeout counter triggered on threshold violation. Its internal 1.56kΩ MR pullup resistor enables direct pushbutton interfacing without external components.
Unlike earlier family members, MAX6390 features asymmetric reset timing: long VCC-initiated timeout (1120ms min) ensures stable core initialization, while short MR-initiated timeout (140ms min) supports rapid user-triggered recovery - both specified over full industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 1.67V ±2.5% (–40°C to +125°C); ensures reliable detection of 1.8V supply brownout before system instability |
| VCC Reset Timeout | 1120ms minimum; guarantees μP remains held in reset until power stabilizes after startup or dip |
| Manual Reset Timeout | 140ms minimum; enables fast, noise-immune operator-triggered reset without affecting main supply timing |
| Supply Current | 3μA at +1.8V; extends battery life in portable equipment with continuous supervision |
| Reset Output Type | Open-drain active-low; allows wired-OR configuration and level translation across mixed-voltage systems |
| MR Pullup Resistance | 1.56kΩ internal; eliminates need for external pullup and supports direct connection to momentary switch |
| Operating Voltage Range | 1.0V to 5.5V; maintains valid reset state even during deep brownout conditions |
Pinout & Package
MAX6390XS17D4+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, optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail; powers internal circuitry and feeds reset comparator |
| 2 | RESET | Open-drain active-low reset output; requires external pullup; asserts low during VCC or MR fault |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC (1.56kΩ); initiates reset when driven ≤0.3×VCC |
| 4 | GND | Analog and digital ground reference; must be connected directly to system ground plane for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 1.67V threshold | Eliminates external resistor divider and calibration effort for 1.8V I/O rail supervision |
| Asymmetric reset timing | 1120ms VCC timeout / 140ms MR timeout enables independent control of power-up stability vs. user recovery speed |
| Guaranteed operation down to VCC = 1V | Ensures deterministic reset assertion during severe brownout, preventing undefined μP behavior |
| 3μA supply current at 1.8V | Reduces quiescent load on coin-cell or energy-harvesting sources by >50% versus legacy supervisors |
| 4-pin SC70 footprint | Minimizes PCB area vs. 6-pin μDFN while retaining full functionality and thermal performance (θJA = 322.6°C/W) |
Applications
| Portable Medical Sensors | Battery-Powered IoT Nodes |
|---|---|
Use Scenario: Wearable ECG sensor operating from CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Supervises 1.8V I/O supply and triggers hard reset if voltage sags below 1.67V during radio burst; manual reset via tactile button clears firmware lockups. Use Value: 140ms MR timeout enables immediate recovery without waiting for full 1120ms power-cycle delay, preserving battery charge. | Use Scenario: LoRaWAN end-node powered by solar-charged Li-ion with variable light conditions. IC Role / Device Role / Timing Role: Monitors 1.8V MCU supply; asserts reset during dawn/dusk voltage transitions; open-drain output interfaces safely with 3.3V transceiver logic. Use Value: 3μA quiescent current minimizes dark-current drain, extending operational uptime between charging cycles. |
| Industrial Handheld Terminals | Low-Power Edge AI Modules |
Use Scenario: Ruggedized barcode scanner using 1.8V FPGA core and 3.3V interface peripherals. IC Role / Device Role / Timing Role: Provides clean power-on reset to FPGA while allowing separate 140ms manual reset for UI hang recovery without disrupting peripheral power rails. Use Value: Asymmetric timing prevents accidental UI resets from interfering with FPGA configuration sequence. | Use Scenario: TinyML inference module running on ultra-low-power MCU with intermittent sensor wake-ups. IC Role / Device Role / Timing Role: Ensures deterministic restart after brownout caused by simultaneous sensor activation and neural network execution. Use Value: 1120ms timeout exceeds typical MCU boot + memory initialization time, eliminating race conditions during cold start. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR17D4+T | Same 1.67V threshold and 1120ms timeout, but push-pull active-low output and no MR input | Lacks manual reset capability; requires external MR circuitry if user-initiated reset needed | Select when board layout prohibits external pullup or when MR functionality is unnecessary |
| TPS3808G17DBVR | 1.67V threshold, 1200ms timeout, 1.8V–6V operation, but 12μA ICC at 1.8V and 5-pin SOT-23 package | Higher supply current reduces battery life; larger footprint increases PCB cost in space-critical designs | Select only if automotive AEC-Q100 qualification is required (TPS3808G17DBVR is AEC-Q100 Grade 2) |
Compared with MAX6326XR17D4+T and TPS3808G17DBVR, MAX6390XS17D4+T uniquely combines integrated MR with low-leakage open-drain output and industry-leading 3μA supply current - making it optimal for compact, battery-sensitive applications requiring both automatic and manual reset paths.
Availability
MAX6390XS17D4+T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered IoT nodes, industrial handheld terminals, low-power edge AI modules, and dual-voltage embedded controllers requiring stable component supply and long-term lifecycle support.
Supply support for MAX6390XS17D4+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 high-performance analog and mixed-signal semiconductor solutions for industrial, communications, computing, and consumer markets.
The MAX6381–MAX6390 family delivers ultra-low-power, precision voltage supervision for microprocessor-based systems - specifically engineered for battery longevity, small-footprint integration, and robust operation across extended temperature ranges.
FAQ
What is the exact reset threshold voltage of MAX6390XS17D4+T and how accurate is it over temperature?
The MAX6390XS17D4+T has a factory-set VCC reset threshold of 1.67V, with ±2.5% accuracy guaranteed over the full –40°C to +125°C operating range. This value corresponds to the "17" suffix in the part number per Maxim's Reset Threshold table. The tolerance ensures reliable detection of 1.8V supply droop without false triggering during thermal cycling.
Does MAX6390XS17D4+T support manual reset, and what is its timing behavior?
Yes, MAX6390XS17D4+T includes an active-low manual reset (MR) input with an internal 1.56kΩ pullup resistor. When MR is pulled low, the device asserts reset for a guaranteed minimum of 140ms after MR is released (D4 timing). This shorter timeout enables rapid user-triggered recovery distinct from the 1120ms VCC-initiated reset period.
What package type and pin count does MAX6390XS17D4+T use, and is it RoHS-compliant?
MAX6390XS17D4+T uses a 4-pin SC70 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm. The "+T" suffix confirms it is lead(Pb)-free and RoHS-compliant. This compact footprint supports high-density layouts in portable and wearable electronics without sacrificing thermal performance (θJA = 322.6°C/W).
How does the open-drain RESET output of MAX6390XS17D4+T function, and what external component is required?
The RESET output of MAX6390XS17D4+T is open-drain active-low, requiring an external pullup resistor to the target logic rail (e.g., 3.3V or 5V). This enables level-shifting and wired-OR connectivity. Typical pullup values range from 10kΩ to 100kΩ; the device guarantees VOL ≤0.3V at ISINK = 80µA when VCC ≥1.0V, ensuring solid low-state drive.
What is the supply current of MAX6390XS17D4+T at 1.8V, and how does it compare to similar supervisors?
MAX6390XS17D4+T draws only 3μA of supply current at +1.8V (typical), as specified in the Electrical Characteristics table. This is among the lowest in its class - approximately half the current of competing devices like TPS3808G17DBVR (12μA at 1.8V) - directly extending battery runtime in always-on portable applications.
MAX6390XS17D4+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:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.67V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 1.12s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6390XS17D4+T FAQ
1.How can I place an order for MAX6390XS17D4+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6390XS17D4+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 MAX6390XS17D4+T reliable?
The price and inventory of MAX6390XS17D4+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6390XS17D4+T is usually 5 days.
3.What payment methods are accepted for MAX6390XS17D4+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6390XS17D4+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6390XS17D4+T?
MAX6390XS17D4+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6390XS17D4+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 MAX6390XS17D4+T?
For technical support, including MAX6390XS17D4+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6390XS17D4+T requirements.
6.How does Aetrix verify that MAX6390XS17D4+T is sourced from the original manufacturer or authorized distributors?
All MAX6390XS17D4+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 MAX6390XS17D4+T meets industry standards.
7.What is the process for return or replacement of MAX6390XS17D4+T?
All MAX6390XS17D4+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6390XS17D4+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 MAX6390XS17D4+T part is unused and in its original packaging.
Return procedure for MAX6390XS17D4+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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