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Analog Devices Inc./Maxim Integrated MAX6390XS30D7+T
- Part No.:
- MAX6390XS30D7+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6390XS30D7+T.pdf
- Description:
- IC MPU/RESET CIRC 3.00V SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:40,000
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Product details
Overview
The MAX6390XS30D7+T 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-initiated) and 150ms (manual reset). It operates from +1.0V to +5.5V supply, draws only 3μA at +1.8V, and guarantees valid reset state down to VCC = 1V - used in battery-powered controllers and critical μP power monitoring systems.
For engineers reviewing the MAX6390XS30D7+T datasheet, MAX6390XS30D7+T pinout, MAX6390XS30D7+T application, or MAX6390XS30D7+T equivalent, key selection considerations include its 4-pin SC70 package, manual reset input with internal 1.56kΩ pullup, negative-going transient immunity, and guaranteed reset assertion during brownout conditions below 3.00V.
Technical Context
The MAX6390XS30D7+T implements a precision voltage comparator with ±2.5% threshold accuracy over -40°C to +125°C and a temperature-stable 60ppm/°C tempco. Its reset timeout logic uses an internal RC timer calibrated for 1200ms minimum VCC reset hold time and 150ms minimum manual reset hold time.
It features a dedicated MR input with 100ns glitch rejection and 1µs minimum pulse width support, and its open-drain RESET output requires an external pullup resistor. The device guarantees correct logic state for VCC ≥ 1V and provides immunity to short-duration negative-going VCC transients via comparator overdrive tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.00V ±2.5% (min 2.93V, max 3.08V) - ensures reliable detection of 3.3V rail brownout before system instability |
| 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, user-triggered reset without interfering with power-up sequencing |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered portable instrumentation |
| Operating Voltage Range | +1.0V to +5.5V - supports valid reset assertion even during deep brownout or partial power loss |
| MR Pullup Resistance | 500Ω to 3kΩ (typ 1.56kΩ) - ensures robust noise immunity on manual reset line without external components |
| RESET Output Type | Open-drain active-low - allows wired-OR configuration with other reset sources and flexible voltage-level translation |
Pinout & Package
MAX6390XS30D7+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 portable designs.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor - powers internal circuitry and triggers reset when falling below 3.00V threshold |
| 2 | RESET | Open-drain active-low reset output - sinks current when asserted; requires external pullup to host logic voltage (e.g., 3.3V or 1.8V) |
| 3 | MR | Active-low manual reset input - forces reset when pulled low; internally pulled up to VCC with 1.56kΩ resistor |
| 4 | GND | Analog/digital ground reference - must be connected directly to system ground plane for stable comparator operation |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent timeout periods | 1200ms VCC reset + 150ms manual reset - decouples power-fail recovery timing from operator-initiated reset |
| ±2.5% reset threshold accuracy over temperature | Valid across -40°C to +125°C - eliminates need for external calibration in automotive or industrial environments |
| Guaranteed reset validity down to VCC = 1V | Ensures deterministic μP initialization even during severe brownout - no undefined logic states |
| Negative-going VCC transient immunity | Rejects glitches ≤150µs wide at 100mV overdrive - prevents spurious resets in electrically noisy systems |
| Low 3μA supply current at +1.8V | Extends battery life in always-on monitoring applications - e.g., >10 years on CR2032 cell |
Applications
| Industrial Controller Power Monitoring | Battery-Powered IoT Sensor Node |
|---|---|
|
Use Scenario: Monitoring 3.3V main rail in programmable logic controller during AC mains interruption. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to ARM Cortex-M7 core until rail recovers and stabilizes for ≥1200ms. Use Value: Prevents corrupted firmware execution during brief (<500ms) utility outages by enforcing minimum reset hold time. |
Use Scenario: Enabling reliable wake-from-sleep reset in BLE-enabled environmental sensor with coin-cell supply. IC Role / Device Role / Timing Role: Open-drain RESET output pulled to 1.8V I/O domain; asserts during VCC drop below 3.00V or button press. Use Value: 150ms manual reset timeout allows clean sensor reinitialization without disrupting ultra-low-power sleep cycles. |
| Automotive Body Control Module | Medical Portable Diagnostic Device |
|
Use Scenario: Validating 5V auxiliary rail integrity in AEC-Q100 qualified body control unit under load dump conditions. IC Role / Device Role / Timing Role: Monitors rail with ±2.5% threshold accuracy over -40°C to +125°C; asserts reset on undervoltage. Use Value: Ensures fail-safe shutdown and restart of CAN interface logic when supply sags below safe operating margin. |
Use Scenario: Providing deterministic power-on reset for FPGA-based signal processing in handheld ultrasound probe. IC Role / Device Role / Timing Role: Guarantees RESET remains asserted until VCC ≥ 3.00V for ≥1200ms, satisfying FPGA configuration timing requirements. Use Value: Eliminates boot failures caused by marginal power ramp rates in Li-ion–powered medical equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR30D7+T | Same 3.00V threshold and 1200ms timeout, but push-pull active-low output and no MR input | Lacks manual reset capability; requires external pullup not needed for open-drain | Select when board layout already includes pullup and manual reset is unnecessary |
| TPS3808G30DBVR | 3.0V threshold, 1200ms timeout, push-pull active-low, 1.6V–6.0V VCC range, 1.6μA typical ICC | Lower quiescent current but no manual reset input; different pinout (SOT-23-5) | Prefer for ultra-low-power designs where MR is unused and SOT-23 footprint is available |
Compared with MAX6326XR30D7+T and TPS3808G30DBVR, the MAX6390XS30D7+T uniquely combines open-drain flexibility, integrated manual reset with optimized pullup, and guaranteed sub-1V operation - making it optimal for space-constrained, user-serviceable embedded systems requiring robust brownout and operator-initiated recovery.
Availability
MAX6390XS30D7+T is available at Aetrix Electronics and suitable for industrial controllers, battery-powered IoT sensors, automotive body electronics, and portable medical devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6390XS30D7+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 ICs for demanding industrial, automotive, and computing applications.
The MAX6381–MAX6390 family delivers low-power, precision voltage supervision for microprocessor systems - engineered specifically for reliability in brownout-prone, battery-operated, and thermally harsh environments.
FAQ
What is the exact reset threshold voltage of the MAX6390XS30D7+T?
The MAX6390XS30D7+T has a factory-set nominal reset threshold of +3.00V, with guaranteed limits of +2.93V (minimum) and +3.08V (maximum) over the full -40°C to +125°C temperature range. This ±2.5% accuracy ensures consistent detection of 3.3V rail undervoltage without external calibration, and the threshold is specified at VCC = 3.00V to 5.5V.
Does the MAX6390XS30D7+T support manual reset functionality?
Yes, the MAX6390XS30D7+T includes a dedicated MR (manual reset) input on Pin 3. Driving MR low forces an immediate reset assertion, which remains active for a guaranteed minimum of 150ms after MR is released. The pin features an internal 1.56kΩ pullup resistor to VCC, eliminating the need for external components in most implementations.
What package type and dimensions does the MAX6390XS30D7+T use?
The MAX6390XS30D7+T is supplied in a lead(Pb)-free, RoHS-compliant 4-pin SC70 package (outline number 21-0098), measuring 2.0mm × 2.1mm × 0.95mm. Its compact footprint and thermal resistance (θJA = 322.6°C/W on multilayer board) make it ideal for dense PCB layouts in portable and automotive electronics.
How does the MAX6390XS30D7+T handle power supply transients?
The MAX6390XS30D7+T provides built-in immunity to negative-going VCC transients: it will not assert reset for glitches ≤150µs wide when the overdrive (VTH – VCC) is 100mV, per the Typical Operating Characteristics graph. This prevents spurious resets in electrically noisy environments, and adding a 0.1µF ceramic capacitor near VCC further enhances immunity.
Can the MAX6390XS30D7+T operate reliably at very low supply voltages?
Yes, the MAX6390XS30D7+T guarantees correct RESET output logic state for VCC ≥ 1.0V - meaning it continues asserting reset even during deep brownout conditions. However, valid reset assertion down to VCC = 0V requires external pullup/pulldown resistors, which is not applicable here due to its open-drain architecture.
MAX6390XS30D7+T 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+T FAQ
1.How can I place an order for MAX6390XS30D7+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6390XS30D7+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 MAX6390XS30D7+T reliable?
The price and inventory of MAX6390XS30D7+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6390XS30D7+T is usually 5 days.
3.What payment methods are accepted for MAX6390XS30D7+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6390XS30D7+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6390XS30D7+T?
MAX6390XS30D7+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6390XS30D7+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 MAX6390XS30D7+T?
For technical support, including MAX6390XS30D7+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6390XS30D7+T requirements.
6.How does Aetrix verify that MAX6390XS30D7+T is sourced from the original manufacturer or authorized distributors?
All MAX6390XS30D7+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 MAX6390XS30D7+T meets industry standards.
7.What is the process for return or replacement of MAX6390XS30D7+T?
All MAX6390XS30D7+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6390XS30D7+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 MAX6390XS30D7+T part is unused and in its original packaging.
Return procedure for MAX6390XS30D7+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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