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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:4,365
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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 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 MAX6390XS17D4-T datasheet, MAX6390XS17D4-T pinout, MAX6390XS17D4-T application, or MAX6390XS17D4-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 MAX6390XS17D4-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 uses separate internal timers for VCC-initiated reset (1120ms min) and manual reset input (MR) assertion (140ms min).
It features an open-drain RESET output requiring external pullup, a dedicated MR input with 1.56kΩ internal pullup resistor, and guaranteed valid logic state for VCC ≥ 1V. Negative-going VCC transient immunity is characterized up to 150µs at 100mV overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 1.67V nominal, ±2.5% over temperature - ensures reliable brownout detection for 1.8V logic rails |
| VCC Reset Timeout | 1120ms minimum - holds μP in reset long enough for power stabilization after undervoltage recovery |
| MR Timeout | 140ms minimum - provides short, deterministic reset pulse when manually triggered |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| Reset Output Type | Open-drain active-low - supports wired-OR reset bus and level translation across voltage domains |
| Operating Temp Range | -40°C to +125°C - qualified for automotive under-hood and industrial control environments |
| MR Pullup Resistance | 1.56kΩ - ensures fast MR release while minimizing standby current in noisy environments |
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, suitable for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail; operates from 1.0V to 5.5V |
| 2 | RESET | Open-drain active-low reset output; requires external pullup; sinks 3.2mA at VCC ≥ 4.5V |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC with 1.56kΩ; asserts reset when pulled below 0.3×VCC |
| 4 | GND | Analog and digital ground reference; must be connected directly to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent reset timing | 1120ms VCC timeout + 140ms MR timeout - eliminates need for external timing components in dual-trigger systems |
| Guaranteed reset validity down to VCC = 1V | Ensures deterministic μP initialization even during deep brownout conditions before full power-up |
| Low 3μA supply current at 1.8V | Extends battery life in always-on monitoring applications without compromising reset reliability |
| 1.56kΩ internal MR pullup | Provides robust noise immunity on manual reset line while enabling direct switch-to-ground interface |
| ±2.5% reset threshold accuracy | Meets AEC-Q100 requirements for automotive power monitoring without calibration |
Applications
| Portable Medical Sensors | Automotive Body Control Modules |
|---|---|
Use Scenario: Wearable ECG patch operating from CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Supervises 1.8V LDO output; asserts open-drain RESET to MCU during battery sag below 1.67V; MR pin used for user-initiated firmware update reset. Use Value: 140ms MR timeout enables quick, non-disruptive reinitialization; 3μA quiescent current extends operational life beyond 2 years. | Use Scenario: Door module controlling window lift, mirror fold, and interior lighting using 3.3V domain. IC Role / Device Role / Timing Role: Monitors 3.3V supply derived from vehicle battery; triggers 1120ms reset on cold-crank voltage dip; MR tied to service diagnostic port. Use Value: ±2.5% threshold accuracy ensures consistent trip point across -40°C to +125°C ambient; AEC-Q100 qualification validates reliability in under-dash environment. |
| Industrial PLC I/O Submodules | Smart Energy Meters |
Use Scenario: DIN-rail mounted I/O expander with isolated 5V and 3.3V rails powered from 24V DC input. IC Role / Device Role / Timing Role: Resets local ARM Cortex-M0+ controller if main 3.3V rail drops during ESD event; MR connected to maintenance mode jumper. Use Value: Open-drain RESET allows shared reset bus across multiple submodules; negative-going transient immunity prevents false resets during field transients. | Use Scenario: Revenue-grade meter with real-time clock, metrology IC, and NB-IoT modem operating from supercapacitor backup. IC Role / Device Role / Timing Role: Detects supercap voltage decay below 1.67V; initiates graceful shutdown sequence via 1120ms reset hold; MR used for factory calibration reset. Use Value: Guaranteed reset assertion down to VCC = 1V ensures RTC and SRAM retention integrity during final energy depletion phase. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR26D3+T | Push-pull active-low reset; 2.63V threshold; 140ms timeout; no MR input | Lacks manual reset capability; fixed timing only; not suitable where operator-initiated reset required | Select when only VCC supervision is needed and board layout lacks MR routing |
| TLV809K33DBZR | Open-drain active-low; 3.3V threshold; 200ms timeout; 0.5μA IQ at 3.3V; SOT-23-3 | Higher threshold unsuitable for 1.8V systems; shorter timeout; smaller package but no MR function | Choose for ultra-low-power 3.3V applications where MR is unused and footprint is critical |
Compared with MAX6326XR26D3+T and TLV809K33DBZR, the MAX6390XS17D4-T uniquely delivers both precise low-voltage supervision (1.67V) and integrated manual reset with asymmetric timing-enabling compact, feature-complete reset solutions in space- and power-constrained 1.8V designs.
Availability
MAX6390XS17D4-T is available at Aetrix Electronics and suitable for portable medical sensors, automotive body control modules, industrial PLC I/O submodules, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
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 precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and computing applications.
The MAX6381–MAX6390 family delivers low-power, high-accuracy μP reset supervision with flexible timing and packaging for battery-operated and harsh-environment electronics.
FAQ
What is the exact reset threshold voltage of MAX6390XS17D4-T and how is it specified?
The MAX6390XS17D4-T has a factory-set VCC reset threshold of 1.67V nominal, with guaranteed tolerance of ±2.5% over the full operating temperature range (-40°C to +125°C). This value is defined in the Reset Thresholds table of the datasheet, where suffix "17" corresponds to 1.62V (min), 1.67V (nom), and 1.71V (max) at +25°C, and ±2.5% applies across temperature. The MAX6390XS17D4-T maintains this accuracy without external calibration.
Does MAX6390XS17D4-T support manual reset functionality, and what are its timing characteristics?
Yes, the MAX6390XS17D4-T includes a dedicated active-low manual reset input (MR) with an internal 1.56kΩ pullup resistor. When MR is pulled low, it asserts reset for a guaranteed minimum timeout of 140ms after MR is released (D4 timing variant). This is distinct from the 1120ms VCC-initiated reset timeout, providing asymmetric timing optimized for user-triggered vs. power-failure events.
What package type and pin count does MAX6390XS17D4-T use, and are landing patterns available?
The MAX6390XS17D4-T is supplied in a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. This RoHS-compliant package is compatible with standard reflow soldering profiles. Official land patterns and footprint recommendations are published by Maxim Integrated and accessible via their package resource portal.
How does the open-drain RESET output of MAX6390XS17D4-T differ from push-pull variants in the same family?
The MAX6390XS17D4-T features an open-drain active-low RESET output, requiring an external pullup resistor to the target logic rail. This enables wired-OR connectivity, level shifting across different voltage domains, and shared reset buses-unlike push-pull versions (e.g., MAX6381/MAX6382) which drive both high and low actively. The MAX6390XS17D4-T's VOL is 0.4V at 3.2mA sink load when VCC ≥ 4.5V.
Is MAX6390XS17D4-T qualified for automotive applications, and what evidence supports this?
Yes, the MAX6390XS17D4-T is AEC-Q100 qualified for automotive applications. The datasheet explicitly states "AEC-Q100 Qualified" in the Features section and confirms operation over -40°C to +125°C. While the specific /V automotive trim suffix is optional (e.g., MAX6390XS17D4/V+T), the base MAX6390XS17D4-T meets the stress test requirements and thermal specifications required for automotive grade 2 compliance.
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:
- Obsolete
- 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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