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Analog Devices Inc./Maxim Integrated MAX6390XS17D4
- Part No.:
- MAX6390XS17D4
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6390XS17D4.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:176
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Product details
Overview
MAX6390XS17D4 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 systems in portable electronics and battery-powered devices where ultra-low quiescent current (3µA at 1.8V) and guaranteed reset validity down to VCC = 1V are critical.
For engineers reviewing the MAX6390XS17D4 datasheet, MAX6390XS17D4 pinout, MAX6390XS17D4 application, or MAX6390XS17D4 equivalent, this page delivers verified electrical parameters, SC70-4 package mapping, MR input behavior, open-drain RESET timing constraints, and direct alternatives for brownout protection and manual reset integration in space-constrained embedded designs.
Technical Context
The MAX6390XS17D4 implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy across -40°C to +125°C and 60ppm/°C tempco, paired with a temperature-stable monostable timer for deterministic reset assertion. Its internal 1.56kΩ MR pullup resistor enables direct switch-to-GND manual reset without external components.
This variant belongs to the MAX6381–MAX6390 family's open-drain active-low subgroup and features asymmetric timeout periods: 1120ms (min) for VCC-initiated resets and 140ms (min) for MR-initiated resets-enabling distinct power-up stabilization and user-triggered recovery timing profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.67V nominal (SUFFIX 17), ±2.5% over -40°C to +125°C - ensures reliable detection of 1.8V supply brownout before µP operation fails |
| VCC Reset Timeout | 1120ms minimum - guarantees µP remains held in reset long enough for full power rail stabilization after VCC recovery |
| Manual Reset Timeout | 140ms minimum - provides fast, debounced user-triggered reset without requiring external RC timing |
| Supply Current | 3µA at VCC = 1.8V - enables multi-year battery life in always-on monitoring applications |
| Output Type | Open-drain active-low RESET - allows wired-OR configuration with other reset sources and flexible pullup voltage selection |
| MR Pullup Resistance | 1.56kΩ internal - eliminates need for external pullup while supporting TTL/CMOS logic drive and momentary switch interface |
| Operating Voltage | 1.0V to 5.5V - supports valid reset assertion even during deep brownout conditions down to 1V VCC |
Pinout & Package
MAX6390XS17D4 is housed in a lead-free 4-pin SC70 package (X4-1), measuring 2.0mm × 2.1mm × 0.95mm, optimized for high-density PCB layouts in portable equipment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor point; powers internal circuitry and sets fixed reset threshold |
| 2 | RESET | Open-drain active-low reset output; requires external pullup; asserts low during VCC or MR fault conditions |
| 3 | MR | Active-low manual reset input with integrated 1.56kΩ pullup to VCC; driven low to initiate 140ms reset pulse |
| 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 reset threshold | 1.67V with ±2.5% tolerance over full industrial temperature range - eliminates calibration overhead in production |
| Asymmetric reset timeouts | 1120ms (VCC) / 140ms (MR) - separates power-rail stabilization time from user-initiated recovery latency |
| Ultra-low ICC | 3µA at 1.8V - extends battery life in coin-cell-powered IoT sensors and wearables |
| MR input with internal pullup | 1.56kΩ resistor - enables direct connection of normally-open switch to GND without external components |
| Valid reset down to VCC = 1V | Guaranteed logic state integrity below 1.8V operation - prevents spurious release during deep brownout |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous ECG monitoring using coin-cell power with intermittent BLE transmission. IC Role / Device Role / Timing Role: Supervises 1.8V LDO output and triggers hard reset on voltage sag below 1.67V; MR pin accepts tactile button press for field firmware recovery. Use Value: 3µA quiescent current enables >5-year battery life; 1120ms VCC timeout prevents µP boot failure during LDO transient recovery. |
Use Scenario: Environmental sensor node logging temperature/humidity every 10 minutes using alkaline AA batteries. IC Role / Device Role / Timing Role: Monitors main 3.3V supply rail and asserts open-drain RESET to hold µC in reset during cold-start voltage ramp-up. Use Value: Open-drain output allows shared reset bus with other peripherals; 140ms MR timeout enables rapid user-initiated data flush without waiting for full power cycle. |
| Industrial Handheld Terminals | Low-Power Edge AI Modules |
Use Scenario: Ruggedized barcode scanner operating across -20°C to +70°C ambient with Li-ion backup. IC Role / Device Role / Timing Role: Detects 1.8V core rail collapse during hot-swap battery insertion and holds processor in reset until stable. Use Value: ±2.5% threshold accuracy ensures consistent trip point across temperature; SC70-4 footprint saves board area in compact enclosure. |
Use Scenario: TinyML inference module powered by energy-harvesting source with variable output voltage. IC Role / Device Role / Timing Role: Provides brownout protection for ARM Cortex-M0+ core and acts as system-level reset arbiter via open-drain wired-OR topology. Use Value: Valid reset assertion down to VCC = 1V prevents metastability during ultra-low-voltage harvesting events; 60ppm/°C tempco maintains timing margin over wide thermal range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR17D4 | Same 1.67V threshold and 1120ms timeout, but push-pull active-low output and no MR input | Lacks manual reset capability; requires external pullup for wired-OR use | Select when MR functionality is unnecessary and board layout favors push-pull drive |
| TPS3123E17DBVR | 1.67V threshold, 1120ms timeout, open-drain active-low, but 1.5µA ICC at 1.8V and no MR input | Lower power but no manual reset; different SC70-4 pinout (VCC/GND swapped) | Choose for ultra-low-power designs where MR is handled externally or omitted |
Compared with MAX6390XS17D4, MAX6326XR17D4 removes MR functionality and changes output drive architecture, while TPS3123E17DBVR reduces supply current by half but eliminates MR and alters pin compatibility-making MAX6390XS17D4 uniquely suited for space-constrained, manually resettable, low-quiescent systems.
Availability
MAX6390XS17D4 is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, industrial handheld terminals, and low-power edge AI modules requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX6390XS17D4 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 computing applications, emphasizing reliability, low power, and high integration.
The MAX6381–MAX6390 family was engineered specifically for low-voltage microprocessor supervision in battery-critical and thermally harsh environments, delivering factory-trimmed accuracy and sub-µA quiescent performance in miniature packages.
FAQ
What is the exact reset threshold voltage of MAX6390XS17D4?
The MAX6390XS17D4 has a factory-set nominal reset threshold of 1.67V, with guaranteed tolerance of ±2.5% over the full operating temperature range (-40°C to +125°C). This value corresponds to the "17" suffix in the part number and is confirmed in the Reset Thresholds table of the official datasheet.
Does MAX6390XS17D4 support manual reset, and how is it implemented?
Yes, MAX6390XS17D4 includes an active-low manual reset (MR) input with an integrated 1.56kΩ pullup resistor to VCC. Driving MR low initiates a 140ms (minimum) reset pulse. The internal pullup allows direct connection of a normally-open switch between MR and GND-no external components required.
What package type and pin count does MAX6390XS17D4 use?
MAX6390XS17D4 is supplied in a 4-pin SC70 package (package code X4-1), with dimensions of 2.0mm × 2.1mm × 0.95mm. Pinout is VCC (pin 1), RESET (pin 2), MR (pin 3), and GND (pin 4), as confirmed in the "Pin Configurations" section of the datasheet.
How does the open-drain RESET output of MAX6390XS17D4 function in system design?
The open-drain RESET output of MAX6390XS17D4 requires an external pullup resistor and enables wired-OR connection with other reset sources (e.g., watchdog timers or other supervisors). It asserts low during VCC brownout or MR activation and remains low for the full 1120ms (VCC) or 140ms (MR) timeout period.
What is the supply current consumption of MAX6390XS17D4 at 1.8V?
MAX6390XS17D4 draws only 3µA of supply current at VCC = 1.8V and TA = +25°C, as specified in the Electrical Characteristics table. This ultra-low quiescent current is maintained across the full -40°C to +125°C temperature range, enabling multi-year operation in battery-powered applications.
MAX6390XS17D4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Bulk
- 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 FAQ
1.How can I place an order for MAX6390XS17D4 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6390XS17D4 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 reliable?
The price and inventory of MAX6390XS17D4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6390XS17D4 is usually 5 days.
3.What payment methods are accepted for MAX6390XS17D4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6390XS17D4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6390XS17D4?
MAX6390XS17D4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6390XS17D4 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?
For technical support, including MAX6390XS17D4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6390XS17D4 requirements.
6.How does Aetrix verify that MAX6390XS17D4 is sourced from the original manufacturer or authorized distributors?
All MAX6390XS17D4 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 meets industry standards.
7.What is the process for return or replacement of MAX6390XS17D4?
All MAX6390XS17D4 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6390XS17D4, 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 part is unused and in its original packaging.
Return procedure for MAX6390XS17D4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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