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Analog Devices Inc./Maxim Integrated MAX6390XS22D4-T
- Part No.:
- MAX6390XS22D4-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6390XS22D4-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MAX6390XS22D4-T from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 2.19V VCC reset threshold (±2.5% over -40°C to +125°C), 1120ms minimum VCC reset timeout, and 140ms minimum manual reset timeout. It monitors single supply voltage in battery-powered embedded systems requiring guaranteed reset assertion down to VCC = 1V.
For engineers reviewing the MAX6390XS22D4-T datasheet, MAX6390XS22D4-T pinout, MAX6390XS22D4-T application, or MAX6390XS22D4-T equivalent, key selection criteria include its dual-timing reset architecture (VCC vs. MR timeout), 3μA supply current at 1.8V, SC70-4 package footprint, and compatibility with systems needing noise-immune manual reset with internal 1.56kΩ pullup.
Technical Context
The MAX6390XS22D4-T implements a precision bandgap-based reset comparator with ±2.5% threshold accuracy across -40°C to +125°C and 60ppm/°C tempco. Its dual-timing architecture separates VCC-initiated reset (1120ms min) from manual reset (140ms min), enabling independent power-up stabilization and operator-triggered recovery.
It features an open-drain RESET output requiring external pullup, a manual reset input (MR) with 1.56kΩ internal pullup to VCC, and guaranteed valid logic state for VCC ≥ 1V. Negative-going VCC transient immunity is characterized up to 150µs for 100mV overdrive, supporting robust operation in noisy environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.19V nominal (SUFFIX 22), ±2.5% over -40°C to +125°C - ensures reliable brownout detection across automotive/industrial temperature range |
| VCC Reset Timeout | 1120ms minimum (SUFFIX D4) - guarantees μP initialization stability after power recovery |
| Manual Reset Timeout | 140ms minimum (SUFFIX D4) - enables fast, deterministic user-triggered reset without interfering with power-up timing |
| Supply Current | 3μA at VCC = 1.8V - supports multi-year battery life in portable equipment |
| RESET Output Type | Open-drain active-low - allows wired-OR configuration and level translation with external pullup |
| MR Pullup Resistance | 1.56kΩ (typical) - provides strong internal bias for noise immunity without external components |
| Operating Voltage Range | 1.0V to 5.5V - ensures functional reset assertion even during deep brownout conditions |
Pinout & Package
MAX6390XS22D4-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 monitored voltage source for primary reset threshold detection |
| 2 | RESET | Open-drain active-low reset output - requires external pullup resistor; asserts low during fault or manual reset |
| 3 | MR | Active-low manual reset input - internally pulled up to VCC via 1.56kΩ; drives reset when pulled to GND |
| 4 | GND | Ground reference for all internal circuitry and reset comparator |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent reset timeouts | VCC reset timeout (1120ms) and MR timeout (140ms) prevent timing conflicts between power-up and user-initiated reset |
| Guaranteed operation down to VCC = 1V | Ensures valid RESET logic state during severe brownout, eliminating need for external voltage translators |
| Negative-going VCC transient immunity | Withstands transients up to 150µs duration at 100mV overdrive - reduces false resets in electrically noisy systems |
| Factory-trimmed reset threshold | 2.19V ±2.5% over full temperature range - eliminates external resistor networks and calibration effort |
| Low quiescent current | 3μA at 1.8V - extends battery runtime in always-on monitoring applications such as IoT sensors |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG monitor powered by coin-cell battery with intermittent BLE transmission. IC Role / Device Role / Timing Role: Supervises VCC during sleep/wake cycles and asserts reset on voltage sag below 2.19V; MR enables clinical staff to force reboot via button press. Use Value: 140ms MR timeout allows rapid recovery without disrupting sensor sampling sequence; 3μA ICC preserves multi-month battery life. |
Use Scenario: DIN-rail mounted I/O module operating in factory automation with 24VDC input and isolated 3.3V logic rail. IC Role / Device Role / Timing Role: Monitors 3.3V rail for brownout; open-drain RESET interfaces directly with µC's active-low reset pin and shares bus with other supervisors. Use Value: 1120ms VCC timeout ensures stable firmware load after line disturbance; ±2.5% threshold accuracy maintains reliability across -40°C to +85°C ambient. |
| Automotive Body Control Units | Smart Energy Meters |
Use Scenario: Low-voltage subsystem (e.g., door module) powered from vehicle battery with wide voltage variation (6–16V). IC Role / Device Role / Timing Role: Resets microcontroller when 3.3V LDO output drops below 2.19V due to cranking dip; MR supports service-mode diagnostics. Use Value: AEC-Q100 qualified variant available; 1.56kΩ MR pullup rejects EMI better than typical 100kΩ alternatives in automotive harness environments. |
Use Scenario: Revenue-grade meter with tamper-detection circuitry and backup supercapacitor maintaining RTC during mains outage. IC Role / Device Role / Timing Role: Detects failure of main 3.3V supply and triggers controlled shutdown; MR enables field technician to initiate firmware update reset. Use Value: Valid RESET down to VCC = 1V ensures clean restart even as supercapacitor discharges to end-of-life voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR22D4+T | Push-pull active-low reset output; same 2.19V threshold and 1120ms timeout; no MR input | Lacks manual reset capability; suited for fixed-function systems without user intervention needs | Select when board layout lacks MR trace routing or system design prohibits external reset buttons |
| TLV809E22DBZR | 2.19V threshold, 140ms timeout, SOT-23-3 package; no MR input; higher ICC (1.1µA typ at 1.8V) | Smaller footprint but no manual reset; lower accuracy (±3% over temp); not AEC-Q100 qualified | Choose for cost-sensitive consumer applications where automotive qualification and dual-timing are unnecessary |
Compared with MAX6390XS22D4-T, MAX6326XR22D4+T offers simpler push-pull drive but removes MR functionality, while TLV809E22DBZR reduces size and cost at the expense of timing flexibility, accuracy, and qualification - making MAX6390XS22D4-T optimal for industrial and automotive designs requiring deterministic manual reset behavior.
Availability
MAX6390XS22D4-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 with long-term lifecycle support.
Supply support for MAX6390XS22D4-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 communications applications.
The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy reset supervision for battery-operated and harsh-environment systems where deterministic power-up sequencing and noise-immune reset initiation are critical.
FAQ
What is the exact reset threshold voltage of MAX6390XS22D4-T?
The MAX6390XS22D4-T has a factory-set VCC reset threshold of 2.19V nominal, with tolerance of ±2.5% over the full operating temperature range (-40°C to +125°C). This value is defined by the "22" suffix per the Reset Threshold table in the datasheet and is trimmed during production to ensure accuracy without external components.
Does MAX6390XS22D4-T support manual reset, and what is its timeout behavior?
Yes, MAX6390XS22D4-T includes a dedicated MR (manual reset) input with an internal 1.56kΩ pullup resistor. When MR is pulled low, the device asserts RESET for a minimum of 140ms after MR is released (D4 suffix), independent of the 1120ms VCC reset timeout - enabling fast, user-initiated recovery without affecting power-up timing.
What package type and dimensions does MAX6390XS22D4-T use?
MAX6390XS22D4-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 land pattern (90-0187) is optimized for reflow soldering on multilayer PCBs and supports high-density layouts in portable and automotive electronics.
Can MAX6390XS22D4-T operate reliably during deep brownout conditions?
Yes, MAX6390XS22D4-T guarantees valid RESET output logic state down to VCC = 1V, ensuring deterministic reset assertion even during severe brownout. Unlike many supervisors that fail below 1.5V, this feature eliminates need for auxiliary voltage translators or external pulldown resistors in low-voltage recovery scenarios.
Is MAX6390XS22D4-T qualified for automotive applications?
The MAX6390XS22D4-T itself is not automotive-qualified; however, the MAX6390XS22D4/V+T variant (with /V suffix) is AEC-Q100 qualified for Grade 1 (-40°C to +125°C). For automotive body control or infotainment systems requiring qualification, specify the /V version - the base MAX6390XS22D4-T is intended for industrial and commercial applications.
MAX6390XS22D4-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:
- 2.19V
- 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
MAX6390XS22D4-T FAQ
1.How can I place an order for MAX6390XS22D4-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6390XS22D4-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 MAX6390XS22D4-T reliable?
The price and inventory of MAX6390XS22D4-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6390XS22D4-T is usually 5 days.
3.What payment methods are accepted for MAX6390XS22D4-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6390XS22D4-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6390XS22D4-T?
MAX6390XS22D4-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6390XS22D4-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 MAX6390XS22D4-T?
For technical support, including MAX6390XS22D4-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6390XS22D4-T requirements.
6.How does Aetrix verify that MAX6390XS22D4-T is sourced from the original manufacturer or authorized distributors?
All MAX6390XS22D4-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 MAX6390XS22D4-T meets industry standards.
7.What is the process for return or replacement of MAX6390XS22D4-T?
All MAX6390XS22D4-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6390XS22D4-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 MAX6390XS22D4-T part is unused and in its original packaging.
Return procedure for MAX6390XS22D4-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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