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Analog Devices Inc./Maxim Integrated MAX6389XS17D3-T
- Part No.:
- MAX6389XS17D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6389XS17D3-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:20,000
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Product details
Overview
MAX6389XS17D3-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), 140ms minimum reset timeout, and auxiliary RESET IN input for dual-voltage monitoring. It operates from 1.0V to 5.5V supply and consumes only 3μA at 1.8V, targeting battery-powered embedded systems requiring reliable brownout detection.
For engineers reviewing the MAX6389XS17D3-T datasheet, MAX6389XS17D3-T pinout, MAX6389XS17D3-T application, or MAX6389XS17D3-T equivalent, key selection criteria include its 1.67V reset threshold accuracy, 140ms VCC timeout, open-drain output requiring external pullup, RESET IN comparator referenced to 1.27V, and 4-pin SC70 package compatibility with space-constrained designs.
Technical Context
The MAX6389XS17D3-T integrates a precision bandgap reference and comparator to monitor VCC against a fixed 1.67V threshold while simultaneously accepting an external voltage via RESET IN, which is compared to an internal 1.27V reference. Reset asserts if either monitored voltage falls below its respective threshold.
Its open-drain RESET output guarantees valid logic state down to VCC = 1.0V and supports wired-OR configurations. The device features negative-going VCC transient immunity up to 35µs at 100mV overdrive and includes built-in glitch rejection on RESET IN (100ns).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.67V ±2.5% (–40°C to +125°C); ensures stable brownout detection across automotive/industrial temperature range |
| VCC Operating Range | 1.0V to 5.5V; enables use with ultra-low-voltage cores (e.g., 1.2V/1.8V I/O) and legacy 3.3V/5V rails |
| Reset Timeout | 140ms min; provides sufficient hold time for slow-ramping power supplies or firmware initialization sequences |
| Supply Current | 3μA at 1.8V; extends battery life in portable equipment without compromising supervision reliability |
| RESET Output Type | Open-drain active-low; allows level-shifting, multi-source reset arbitration, and compatibility with varied host logic families |
| RESET IN Threshold | 1.27V ±2.5% (–40°C to +125°C); enables precise secondary voltage monitoring using external resistor divider |
| Operating Temp | –40°C to +125°C; qualified for under-hood automotive and industrial control applications |
Pinout & Package
MAX6389XS17D3-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 high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail; powers internal circuitry and feeds main reset comparator |
| 2 | RESET | Open-drain active-low reset output; requires external pullup resistor; sinks ≥80µA at VCC ≥1.0V |
| 3 | GND | Analog/digital ground reference; must be connected directly to system ground plane for noise immunity |
| 4 | RESET IN | Auxiliary high-impedance input (leakage ±50nA); monitors second voltage via external resistor divider referenced to 1.27V internal reference |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneous monitoring of VCC and external rail via RESET IN enables robust dual-supply systems (e.g., core + I/O) |
| Factory-trimmed threshold | 1.67V reset point set at wafer level eliminates need for external resistors or calibration in production |
| Negative transient immunity | Rejects VCC glitches ≤35µs wide at 100mV overdrive, preventing spurious resets in noisy environments |
| Low-VCC operation guarantee | RESET output remains valid down to VCC = 1.0V, ensuring deterministic behavior during deep brownout conditions |
| Ultra-low quiescent current | 3μA at 1.8V enables >10-year battery life in coin-cell-powered IoT sensors and wearables |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors 3.3V I/O supply and 1.2V core rail in a programmable logic controller exposed to wide ambient temperatures and EMI. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting reset when either rail drops below safe operating level; 140ms timeout aligns with FPGA configuration timing. Use Value: Prevents corrupted state machine execution during cold-cranking voltage sag by detecting both rails independently with ±2.5% threshold accuracy. | Use Scenario: Supervises 5V sensor bus and 3.3V MCU supply in a body control unit subjected to load-dump transients and thermal cycling. IC Role / Device Role / Timing Role: Primary reset generator with auxiliary RESET IN used for backup battery monitor; open-drain output interfaces safely with CAN transceiver reset input. Use Value: Enables fail-safe shutdown during undervoltage events while maintaining compatibility with automotive-grade 125°C operation and AEC-Q100 requirements. |
| Portable Medical Sensor Hub | Battery-Powered Smart Meter |
Use Scenario: Powers a BLE-enabled glucose monitor with single-cell Li-ion (2.8–4.2V) and regulated 1.8V analog front-end. IC Role / Device Role / Timing Role: VCC monitors battery voltage; RESET IN monitors LDO output; 140ms timeout accommodates slow analog settling before ADC sampling. Use Value: Extends operational lifetime by drawing only 3μA while ensuring no false resets during RF transmission bursts due to transient immunity. | Use Scenario: Embedded in AMI smart meters using primary alkaline batteries and backup supercapacitor, requiring long-term stability and low self-discharge. IC Role / Device Role / Timing Role: Supervises main 3.3V rail and backup 2.5V capacitor voltage; open-drain output connects to meter SoC's nRST pin with shared pullup. Use Value: Guarantees valid reset assertion down to 1.0V VCC, enabling clean shutdown before battery depletion corrupts EEPROM data. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6387XS17D3-T | Same 1.67V threshold, 140ms timeout, and RESET IN functionality; differs only in pinout - uses 6-pin μDFN instead of 4-pin SC70 | Requires PCB redesign due to different footprint and thermal resistance (θJA = 477°C/W vs. 322.6°C/W) | Select when higher thermal margin or existing μDFN layout reuse is prioritized over board area |
| TLV809K33DBZR | Fixed 3.3V reset threshold (not 1.67V); no RESET IN input; SOT-23-3 package; 1.6μA typical ICC at 3.3V | Lacks dual-supply capability and operates only above 1.7V; unsuitable for sub-2V core monitoring | Choose only for single-rail 3.3V systems where cost and size outweigh flexibility and low-voltage support |
Compared with MAX6387XS17D3-T, the MAX6389XS17D3-T saves 33% board area in SC70 format but trades off thermal performance; versus TLV809K33DBZR, it delivers critical dual-voltage supervision and 1.67V threshold essential for modern low-power SoCs - neither alternative matches its combined feature set.
Availability
MAX6389XS17D3-T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, portable medical sensor hubs, and battery-powered smart meters requiring stable component supply across extended temperature ranges.
Supply support for MAX6389XS17D3-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 computing applications.
The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy reset supervision for microprocessor-based systems where reliability under brownout, thermal stress, and EMI is non-negotiable.
FAQ
What is the exact reset threshold voltage of the MAX6389XS17D3-T and how stable is it over temperature?
The MAX6389XS17D3-T has a factory-set VCC reset threshold of 1.67V with ±2.5% tolerance over the full –40°C to +125°C operating range. This specification is guaranteed by design and validated across temperature extremes, ensuring consistent brownout detection without external calibration. The device's 60ppm/°C tempco contributes to this stability, making MAX6389XS17D3-T suitable for automotive and industrial environments where voltage margins are tight.
Does the MAX6389XS17D3-T support monitoring of a second voltage rail, and how is it implemented?
Yes, the MAX6389XS17D3-T supports dual-voltage supervision via its dedicated RESET IN pin, which connects to an internal comparator referenced to a precise 1.27V bandgap. To monitor a second rail, apply the target voltage through a resistor divider that scales it to 1.27V at RESET IN - for example, a 100kΩ top resistor and 47kΩ bottom resistor sets a ~3.15V threshold. The MAX6389XS17D3-T asserts reset if either VCC drops below 1.67V or the scaled RESET IN voltage falls below 1.27V.
What is the function of the open-drain RESET output on the MAX6389XS17D3-T, and what external components are required?
The MAX6389XS17D3-T features an open-drain active-low RESET output, meaning it can only sink current and requires an external pullup resistor to define the high state. A typical value is 10kΩ to 100kΩ connected between RESET and the host logic supply (e.g., 3.3V). This configuration enables wired-OR reset buses, level translation between different voltage domains, and compatibility with microcontrollers lacking internal pullups. The output guarantees VOL ≤0.3V at ISINK = 80µA when VCC ≥1.0V.
How does the MAX6389XS17D3-T handle short voltage transients on the VCC line?
The MAX6389XS17D3-T incorporates inherent immunity to negative-going VCC transients: it will not assert reset for glitches ≤35µs wide when the voltage undershoot exceeds the reset threshold by 100mV. This behavior is characterized in the "Maximum Transient Duration vs. Reset Comparator Overdrive" graph in the datasheet. For enhanced immunity, place a 0.1µF ceramic capacitor as close as possible to the VCC pin - a practice confirmed effective in automotive and industrial noise environments per Maxim's application guidance for MAX6389XS17D3-T.
Is the MAX6389XS17D3-T qualified for automotive applications, and what evidence supports this?
Yes, the MAX6389XS17D3-T is AEC-Q100 qualified for automotive use. The datasheet explicitly states "AEC-Q100 Qualified" in the Features section and lists /V suffix variants (e.g., MAX6389XS17D3/V+T) in the Ordering Information table. Its –40°C to +125°C operating temperature range, ±2.5% threshold accuracy over that range, and robust transient immunity meet AEC-Q100 Grade 1 requirements. The "/V" marking in ordering codes confirms automotive qualification, and MAX6389XS17D3-T shares the same process (BiCMOS) and revision history as qualified versions.
MAX6389XS17D3-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:
- 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-T FAQ
1.How can I place an order for MAX6389XS17D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6389XS17D3-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 MAX6389XS17D3-T reliable?
The price and inventory of MAX6389XS17D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6389XS17D3-T is usually 5 days.
3.What payment methods are accepted for MAX6389XS17D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6389XS17D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6389XS17D3-T?
MAX6389XS17D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6389XS17D3-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 MAX6389XS17D3-T?
For technical support, including MAX6389XS17D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6389XS17D3-T requirements.
6.How does Aetrix verify that MAX6389XS17D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6389XS17D3-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 MAX6389XS17D3-T meets industry standards.
7.What is the process for return or replacement of MAX6389XS17D3-T?
All MAX6389XS17D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6389XS17D3-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 MAX6389XS17D3-T part is unused and in its original packaging.
Return procedure for MAX6389XS17D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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