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Analog Devices Inc./Maxim Integrated MAX6390XS30D7+
- Part No.:
- MAX6390XS30D7+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6390XS30D7+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,588
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Product details
Overview
MAX6390XS30D7+ from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 3.00V ±2.5% reset threshold, and dual timeout periods: 1200ms VCC reset timeout and 150ms manual reset timeout. It operates from +1.0V to +5.5V supply, consumes only 3μA at +1.8V, and guarantees valid reset state down to VCC = 1V - used in battery-powered embedded controllers for reliable power-up/brownout detection.
For engineers reviewing the MAX6390XS30D7+ datasheet, MAX6390XS30D7+ pinout, MAX6390XS30D7+ application, or MAX6390XS30D7+ equivalent, key selection factors include its 4-pin SC70 package, 150ms short manual reset timeout (vs. 1200ms VCC timeout), ±2.5% threshold accuracy over –40°C to +125°C, open-drain output requiring external pullup, and automotive-grade AEC-Q100 qualification (denoted by /V suffix variants).
Technical Context
The MAX6390XS30D7+ implements a precision bandgap-based voltage comparator monitoring VCC against a fixed 3.00V threshold, with internal timer logic generating two distinct reset assertion durations: a long 1200ms timeout after VCC recovery and a short 150ms timeout after manual reset release. Its open-drain RESET output requires an external pullup resistor and remains valid down to VCC = 1V.
It features a dedicated active-low manual reset input (MR) with internal 1.56kΩ pullup - significantly lower than standard 63kΩ in earlier family members - enabling faster MR response and improved noise immunity in high-EMI environments. No auxiliary RESET IN or dual-voltage monitoring capability is present.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.00V ±2.5% (–40°C to +125°C); ensures reliable brownout detection across automotive temperature range |
| VCC Reset Timeout | 1200ms minimum; holds μP in reset long enough for full power stabilization after undervoltage recovery |
| Manual Reset Timeout | 150ms minimum; provides fast, debounced system restart without extended hold time |
| Supply Current | 3μA at +1.8V; enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Voltage Range | +1.0V to +5.5V; supports valid reset assertion even during deep brownout or partial power loss |
| Output Type | Open-drain active-low RESET; allows wired-OR configuration and level translation with external pullup |
| MR Pullup Resistance | 1.56kΩ (typical); lowers MR input impedance for robust noise rejection vs. standard 63kΩ |
Pinout & Package
MAX6390XS30D7+ is housed in a RoHS-compliant 4-pin SC70 package (package code X4+1), measuring 2.0mm × 2.1mm × 0.95mm, with exposed pad for thermal enhancement. Pin 1 = VCC, Pin 2 = RESET, Pin 3 = MR, Pin 4 = GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VCC) | Supply Input & Primary Monitor Node | Power source for IC and input to main reset comparator; must be decoupled with 0.1μF capacitor near pin |
| 2 (RESET) | Open-Drain Active-Low Output | Drives low to assert reset; requires external pullup resistor (typically 10kΩ–100kΩ) to host supply rail |
| 3 (MR) | Active-Low Manual Reset Input | Pull to GND to force reset; internal 1.56kΩ pullup ensures defined high state when floating; TTL/CMOS compatible |
| 4 (GND) | Ground Reference | Return path for all internal circuits and reset comparator reference; must connect to clean system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent timeout periods | 1200ms VCC reset timeout + 150ms manual reset timeout enables differentiated system recovery behavior |
| ±2.5% reset threshold accuracy | Guaranteed over full –40°C to +125°C range eliminates need for external calibration in automotive applications |
| 1.56kΩ MR pullup resistor | Reduces susceptibility to EMI-induced false resets compared to standard 63kΩ pullup |
| Valid reset output down to VCC = 1V | Ensures deterministic μP initialization even during severe brownout conditions before full power recovery |
| Open-drain RESET with 0.3V VOL @ 80μA | Supports mixed-voltage systems via flexible external pullup to any compatible logic rail (e.g., 1.8V, 3.3V, 5V) |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Power sequencing and fault recovery in programmable logic controllers operating in factory-floor environments with wide ambient temperature swings and electrical noise. IC Role / Device Role / Timing Role: Supervises 3.3V core supply and asserts open-drain RESET to ARM Cortex-M7 MCU until stable; MR pin connected to service button for field technician-initiated reboot. Use Value: 1200ms VCC timeout ensures FPGA configuration completes before software execution; 150ms MR timeout enables rapid diagnostics reinitiation without waiting for full power cycle. | Use Scenario: Monitoring 5V supply rail in door module ECUs subject to load-dump transients and cold-cranking voltage sags. IC Role / Device Role / Timing Role: Detects VCC drop below 3.00V during cranking; asserts RESET to prevent corrupted CAN message transmission; MR tied to diagnostic test mode switch. Use Value: ±2.5% threshold tolerance over –40°C to +125°C prevents spurious resets during extreme temperature cycling; 1.56kΩ MR pullup rejects noise from shared chassis ground. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Ensuring safe startup and fail-safe shutdown of motor control and display subsystems in battery-backed portable medical devices. IC Role / Device Role / Timing Role: Monitors 3.0V LDO output powering microcontroller; open-drain RESET pulled up to 3.3V logic rail; MR linked to emergency stop button. Use Value: 3μA quiescent current extends battery life; 150ms MR timeout allows immediate pump halt on button press while 1200ms VCC timeout prevents premature firmware launch during Li-ion recharge ramp-up. | Use Scenario: Reliable power-on reset and brownout protection in utility-grade meters deployed in outdoor enclosures with unregulated AC-DC supplies. IC Role / Device Role / Timing Role: Supervises 3.3V meter SoC supply; RESET drives isolated gate driver enable line; MR connected to tamper-detection switch. Use Value: Valid reset assertion down to VCC = 1V maintains safety-critical watchdog function during AC dropout; AEC-Q100 qualified variant ensures long-term reliability in harsh grid environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6390XS30D4+ | Same 3.00V threshold and open-drain output, but 1120ms VCC timeout and 140ms manual reset timeout | Suitable where slightly shorter reset hold times are acceptable for faster system boot | Select for cost-sensitive designs where 80ms VCC timeout reduction and 10ms MR timeout reduction provide no functional impact |
| TLV809E30DBZR | 3.00V threshold, open-drain active-low output, but single 140ms timeout (no dual-timing capability); 0.5μA ICC at 1.8V | Lacks separate MR timeout; optimized for ultra-low-power wearables rather than industrial control | Choose when only one reset duration is needed and sub-1μA supply current is mandatory |
Compared with MAX6390XS30D4+, the MAX6390XS30D7+ provides longer reset assertion for more demanding power stabilization; compared with TLV809E30DBZR, it delivers differentiated timing control essential for systems requiring independent manual and supply-recovery reset behaviors.
Availability
MAX6390XS30D7+ is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical infusion pumps, and smart energy meters requiring stable component supply with AEC-Q100 qualification and long-lifecycle support.
Supply support for MAX6390XS30D7+ 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, mixed-signal, and power management ICs for industrial, automotive, communications, and computing markets.
The MAX6381–MAX6390 family delivers low-power, high-accuracy μP supervisory circuits targeting space-constrained, thermally demanding applications such as automotive ECUs and portable medical devices.
FAQ
What is the exact reset threshold voltage of MAX6390XS30D7+ and how tightly is it specified?
The MAX6390XS30D7+ has a factory-set nominal reset threshold of 3.00V, with guaranteed tolerance of ±2.5% over the full operating temperature range of –40°C to +125°C. This means the actual threshold falls between 2.925V and 3.075V at +25°C, and between 2.925V and 3.075V across all temperatures - critical for consistent brownout detection in automotive and industrial environments where MAX6390XS30D7+ is deployed.
Does MAX6390XS30D7+ support dual-voltage monitoring like some other members of the MAX6381–MAX6390 family?
No, MAX6390XS30D7+ does not support auxiliary voltage monitoring. Unlike MAX6387/MAX6388/MAX6389 which feature a RESET IN pin for secondary supply supervision, MAX6390XS30D7+ monitors only the VCC supply. Its pinout (VCC, RESET, MR, GND) and internal architecture are dedicated to single-rail supervision with dual timeout functionality - a key differentiator confirmed in the Pin Description and Selector Guide sections of the MAX6390XS30D7+ datasheet.
What is the purpose of the 1.56kΩ internal pullup resistor on the MR pin of MAX6390XS30D7+?
The 1.56kΩ internal pullup resistor on the MR pin of MAX6390XS30D7+ ensures a defined logic-high state when the pin is left unconnected or driven by high-impedance sources, while providing stronger noise immunity than the 63kΩ pullup used in earlier family members like MAX6384–MAX6386. This lower resistance reduces susceptibility to EMI-induced glitches on long PCB traces - a design choice specifically implemented in MAX6390XS30D7+ to enhance reliability in electrically noisy automotive and industrial applications.
Can MAX6390XS30D7+ operate reliably when VCC drops below 1.8V?
Yes, MAX6390XS30D7+ guarantees correct reset output behavior down to VCC = 1.0V, as explicitly stated in its Absolute Maximum Ratings and Electrical Characteristics tables. At VCC = 1.0V, the open-drain RESET output maintains valid low-state performance (VOL ≤ 0.3V at 80μA sink), ensuring the microprocessor remains held in reset even during deep brownout conditions - a critical capability for fail-safe operation in battery-depleted or poorly regulated systems where MAX6390XS30D7+ is commonly applied.
Is MAX6390XS30D7+ pin-compatible with legacy Maxim reset ICs like MAX809 or MAX6326?
MAX6390XS30D7+ is not pin-compatible with MAX809 or MAX6326 due to differing pin counts and functions: MAX809 is a 3-pin SC70 device (VCC, GND, RESET), while MAX6390XS30D7+ uses a 4-pin SC70 package (VCC, RESET, MR, GND) with an additional MR terminal. Although the datasheet notes "pin compatible" at the family level for certain footprints, the specific MAX6390XS30D7+ layout requires PCB redesign to accommodate the fourth MR pin - a constraint confirmed by its SC70 pin configuration diagram and ordering information table.
MAX6390XS30D7+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 1.2s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6390XS30D7+ FAQ
1.How can I place an order for MAX6390XS30D7+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6390XS30D7+ 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 MAX6390XS30D7+ reliable?
The price and inventory of MAX6390XS30D7+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6390XS30D7+ is usually 5 days.
3.What payment methods are accepted for MAX6390XS30D7+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6390XS30D7+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6390XS30D7+?
MAX6390XS30D7+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6390XS30D7+ 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 MAX6390XS30D7+?
For technical support, including MAX6390XS30D7+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6390XS30D7+ requirements.
6.How does Aetrix verify that MAX6390XS30D7+ is sourced from the original manufacturer or authorized distributors?
All MAX6390XS30D7+ 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 MAX6390XS30D7+ meets industry standards.
7.What is the process for return or replacement of MAX6390XS30D7+?
All MAX6390XS30D7+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6390XS30D7+, 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 MAX6390XS30D7+ part is unused and in its original packaging.
Return procedure for MAX6390XS30D7+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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