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Analog Devices Inc./Maxim Integrated MAX6389XS17D3
- Part No.:
- MAX6389XS17D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6389XS17D3.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,417
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Product details
Overview
MAX6389XS17D3 from Maxim Integrated is a low-power, open-drain active-low microprocessor supervisory circuit with factory-set 1.67V reset threshold, 140ms minimum reset timeout, auxiliary RESET IN input for dual-voltage monitoring, and operation down to VCC = 1.0V. It consumes only 3µA at +1.8V and supports industrial temperature range (–40°C to +125°C), used in battery-powered embedded controllers requiring reliable power-on reset and brownout detection.
For engineers reviewing the MAX6389XS17D3 datasheet, MAX6389XS17D3 pinout, MAX6389XS17D3 application, or MAX6389XS17D3 equivalent, key selection criteria include its open-drain reset output configuration, 1.67V ±2.5% threshold accuracy over temperature, 140ms VCC reset timeout, auxiliary voltage monitor capability via RESET IN, and SC70-4 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6389XS17D3 integrates a precision bandgap reference and comparator to monitor VCC against a fixed 1.67V threshold while simultaneously accepting an external voltage on RESET IN for secondary supply supervision. Its internal timer guarantees reset assertion for ≥140ms after VCC rises above threshold or after RESET IN recovers.
It features an open-drain RESET output requiring an external pullup, a dedicated RESET IN pin referenced to a stable 1.27V internal reference, and guaranteed valid logic state down to VCC = 1.0V - enabling robust reset signaling even during deep brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.67V ±2.5% over –40°C to +125°C - ensures accurate brownout detection across full industrial temperature range |
| Reset Timeout | 140ms minimum - provides sufficient hold time for µP initialization before release |
| Supply Current | 3µA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| VCC Operating Range | 1.0V to 5.5V - supports valid reset assertion down to near-dead-battery conditions |
| RESET Output Type | Open-drain active-low - allows wired-OR reset bus sharing and flexible voltage-level translation |
| RESET IN Threshold | 1.27V internal reference - enables user-defined secondary reset point via resistor divider |
| Package | 4-pin SC70 (X4-1) - 1.3mm × 1.1mm footprint ideal for ultra-compact portable designs |
Pinout & Package
MAX6389XS17D3 is housed in a lead-free 4-pin SC70 package (pkg code X4-1), measuring 1.3mm × 1.1mm × 0.6mm, with gull-wing leads and exposed pad not present. Pin 1 is marked by a dot or beveled edge.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input; powers internal circuitry and serves as primary voltage monitor |
| 2 | RESET (active-low) | Open-drain output requiring external pullup; asserts low during reset condition |
| 3 | RESET IN | Auxiliary voltage monitor input; compared to 1.27V internal reference for dual-supply supervision |
| 4 | GND | Ground reference for all internal functions and voltage comparisons |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneous monitoring of VCC and external rail via RESET IN enables single-chip protection for core/I/O dual-rail systems |
| 140ms guaranteed reset timeout | Ensures µP completes power stabilization and internal register initialization before release |
| 1.67V ±2.5% threshold accuracy | Minimizes false resets in noisy environments and maintains reliability across temperature extremes |
| Open-drain RESET with 1.0µA max leakage | Permits level-shifting and shared reset buses without contention or voltage conflict |
| Valid operation down to VCC = 1.0V | Guarantees correct reset polarity and timing even during severe brownout or battery depletion |
Applications
| Battery-Powered Sensor Node | Industrial PLC I/O Module |
|---|---|
Use Scenario: A wireless environmental sensor operates from a CR2032 coin cell and must retain valid reset signaling until battery voltage drops below 1.8V. IC Role / Device Role / Timing Role: MAX6389XS17D3 monitors VCC and asserts open-drain RESET to hold the MCU in reset until stable supply is confirmed. Use Value: 3µA quiescent current extends battery life beyond 5 years; 1.67V threshold aligns with LiMnO₂ discharge curve; 140ms timeout satisfies ARM Cortex-M0 startup requirements. | Use Scenario: An isolated digital I/O module supplies separate 3.3V core and 24V field-side rails, requiring coordinated reset assertion if either fails. IC Role / Device Role / Timing Role: MAX6389XS17D3 uses VCC for 3.3V core monitoring and RESET IN (via resistor divider) for 24V rail supervision. Use Value: Single IC eliminates need for two discrete supervisors; open-drain output interfaces cleanly with optocoupled reset distribution network. |
| Medical Wearable Controller | Automotive Body Control Unit (BCU) |
Use Scenario: A wearable ECG patch uses a low-noise LDO and must avoid spurious resets during transient load switching. IC Role / Device Role / Timing Role: MAX6389XS17D3 provides immunity to sub-100ns VCC glitches while asserting reset during sustained brownout. Use Value: Negative-going transient immunity up to 35µs at 100mV overdrive prevents false triggers; ±2.5% threshold stability ensures consistent behavior across body temperature range. | Use Scenario: A BCU monitors both 5V logic supply and 12V vehicle battery, needing fail-safe reset if either dips below specification. IC Role / Device Role / Timing Role: MAX6389XS17D3 supervises 5V rail directly on VCC and scales 12V via RESET IN resistor network to match 1.27V reference. Use Value: Eliminates external reference and comparator; 140ms timeout meets ISO 16750-2 cold-crank reset hold-time requirement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6387XS17D3 | Same 1.67V threshold and 140ms timeout, but 6-pin µDFN-6 package (L611-1) instead of 4-pin SC70 | Requires larger PCB area and different layout; no change in functionality or timing | Select when board space permits larger package or when thermal dissipation margin is critical |
| TLV803EB16DBZR | 1.6V threshold (vs. 1.67V), 140ms timeout, SOT-23-3 package, 0.5µA typical ICC at 1.8V | Lacks RESET IN pin - supports only single-rail monitoring; lower current draw but no dual-supply capability | Select for cost-sensitive single-rail applications where auxiliary monitoring is unnecessary |
Compared with MAX6389XS17D3, MAX6387XS17D3 offers identical electrical behavior in a larger µDFN package suitable for higher thermal mass, while TLV803EB16DBZR reduces supply current by 40% but sacrifices dual-voltage supervision - making MAX6389XS17D3 the optimal choice when RESET IN functionality and SC70 size are required.
Availability
MAX6389XS17D3 is available at Aetrix Electronics and suitable for battery-powered sensor nodes, industrial PLC I/O modules, medical wearables, automotive body control units, and portable instrumentation requiring stable component supply with long-term manufacturability.
Supply support for MAX6389XS17D3 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 industrial, automotive, communications, and computing markets, with emphasis on high-reliability, low-power, and small-footprint solutions.
The MAX6381–MAX6390 family was developed specifically for space-constrained, low-power microprocessor reset and power-supply monitoring applications requiring guaranteed timing, wide temperature operation, and dual-rail supervision capability.
FAQ
What is the exact reset threshold voltage of the MAX6389XS17D3?
The MAX6389XS17D3 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 is confirmed in the Reset Thresholds table of the datasheet under suffix "17", and applies specifically to the MAX6389XS17D3 variant - not inferred from adjacent thresholds or family averages.
Does the MAX6389XS17D3 support dual-voltage monitoring?
Yes, the MAX6389XS17D3 supports dual-voltage monitoring via its dedicated RESET IN pin, which compares an external voltage to a precise 1.27V internal reference. When either VCC falls below 1.67V or the voltage at RESET IN drops below 1.27V, the device asserts its open-drain RESET output - enabling coordinated reset for core/I/O or logic/sensor supply pairs.
What is the function of the RESET IN pin on the MAX6389XS17D3?
The RESET IN pin on the MAX6389XS17D3 is a high-impedance input to a secondary comparator referenced to 1.27V. It allows users to monitor a second voltage rail using an external resistor divider. Reset asserts if either VCC < 1.67V or RESET IN < 1.27V - providing true dual-supply supervision in a single 4-pin SC70 package.
What package type and dimensions does the MAX6389XS17D3 use?
The MAX6389XS17D3 uses a lead-free 4-pin SC70 package (pkg code X4-1), with overall dimensions of 1.3mm × 1.1mm × 0.6mm and gull-wing leads. Pin 1 is identified by a beveled edge or dot marking. This package is distinct from the 3-pin SC70 (X3-2) and 6-pin µDFN (L611-1) variants used across the MAX6381–MAX6390 family.
Is the MAX6389XS17D3 pin-compatible with other parts in the MAX6381–MAX6390 family?
No - the MAX6389XS17D3 uses a 4-pin SC70 package with pinout VCC–RESET–RESET IN–GND, whereas MAX6381/MAX6382/MAX6383 use 3-pin SC70 (no RESET IN), and MAX6384–MAX6390 in µDFN use 6 pins. While functionally related, pin compatibility exists only within same-package variants (e.g., MAX6387XS17D3 in µDFN), not across package types.
MAX6389XS17D3 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:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.67V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6389XS17D3 FAQ
1.How can I place an order for MAX6389XS17D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6389XS17D3 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 MAX6389XS17D3 reliable?
The price and inventory of MAX6389XS17D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6389XS17D3 is usually 5 days.
3.What payment methods are accepted for MAX6389XS17D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6389XS17D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6389XS17D3?
MAX6389XS17D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6389XS17D3 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 MAX6389XS17D3?
For technical support, including MAX6389XS17D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6389XS17D3 requirements.
6.How does Aetrix verify that MAX6389XS17D3 is sourced from the original manufacturer or authorized distributors?
All MAX6389XS17D3 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 MAX6389XS17D3 meets industry standards.
7.What is the process for return or replacement of MAX6389XS17D3?
All MAX6389XS17D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6389XS17D3, 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 MAX6389XS17D3 part is unused and in its original packaging.
Return procedure for MAX6389XS17D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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