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Analog Devices Inc./Maxim Integrated MAX6387XS16D3
- Part No.:
- MAX6387XS16D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6387XS16D3.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,499
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Product details
Overview
The MAX6387XS16D3 from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with active-low push-pull reset output, 1.58V factory-set VCC reset threshold, 140ms minimum reset timeout, and auxiliary RESET IN input for monitoring a second voltage rail. It operates from +1.0V to +5.5V, consumes only 3µA at +1.8V, and guarantees valid reset state down to VCC = 1V - used in battery-powered embedded controllers requiring reliable power-on reset and secondary supply monitoring.
For engineers reviewing the MAX6387XS16D3 datasheet, MAX6387XS16D3 pinout, MAX6387XS16D3 application, or MAX6387XS16D3 equivalent, key selection criteria include its dual-monitoring capability (VCC + RESET IN), ±2.5% reset threshold accuracy over –40°C to +125°C, SC70-4 package footprint, 140ms reset timeout, and compatibility with low-voltage I/O domains in portable instrumentation and industrial edge nodes.
Technical Context
The MAX6387XS16D3 integrates two independent reset comparators: one monitors VCC against a factory-trimmed 1.58V threshold (±2.5% over temperature), while the second compares an external voltage applied to the RESET IN pin against a precise +1.27V internal reference. Its reset assertion logic triggers when either monitored voltage falls below its respective threshold, and the active-low push-pull output remains asserted for a guaranteed minimum 140ms after recovery.
This device uses BiCMOS process technology (647 transistors) and features negative-going VCC transient immunity up to 35µs for 100mV overdrive, MR input glitch rejection of 100ns, and guaranteed reset output validity down to VCC = 1V - enabling robust operation during brownout and low-power wake-up sequences without external pull-ups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.58V (factory-set, ±2.5% over –40°C to +125°C) - ensures predictable power-on reset point for 1.8V core rails. |
| Reset Timeout | 140ms min - provides sufficient hold time for slow-starting µPs and peripheral initialization. |
| 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 direct interface with 1.2V, 1.8V, 2.5V, 3.3V, and 5V systems. |
| RESET IN Threshold | +1.27V internal reference - allows user-defined secondary reset point via resistor divider on RESET IN pin. |
| Output Type | Active-low push-pull - eliminates need for external pull-up resistor; drives reset line directly to GND or VCC. |
| Temp Range | –40°C to +125°C - qualified for under-hood automotive and industrial control environments. |
Pinout & Package
MAX6387XS16D3 is housed in a lead-free 4-pin SC70 package (X4-1, 1.0mm × 1.3mm × 0.6mm), optimized for space-constrained PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary reset monitor rail; powers internal circuitry and sets fixed threshold comparator. |
| 2 | RESET | Active-low push-pull reset output; asserts low during fault and holds for 140ms post-recovery - directly interfaces with µP /C reset input. |
| 3 | RESET IN | Auxiliary voltage monitor input; compared to +1.27V internal reference - enables dual-rail supervision (e.g., core + I/O supply). |
| 4 | GND | Analog/digital ground reference; must be connected to system ground plane for accurate threshold sensing and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent reset comparators | Simultaneous monitoring of VCC (1.58V threshold) and external rail via RESET IN (1.27V reference) - eliminates need for second supervisor IC in dual-supply systems. |
| Factory-trimmed precision threshold | ±2.5% accuracy over full temperature range - removes calibration overhead and improves BOM consistency across production lots. |
| Low quiescent current | 3µA at +1.8V - extends battery life in always-on wearable and sensor nodes without sacrificing supervision reliability. |
| Negative-going transient immunity | Rejects VCC glitches ≤35µs at 100mV overdrive - prevents spurious resets in electrically noisy industrial or automotive environments. |
| Valid reset output down to VCC = 1V | Guaranteed logic state integrity during deep brownout - ensures deterministic µP behavior even as supply collapses. |
Applications
| Battery-Powered Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor with 1.8V MCU and 3.3V analog front-end, powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Supervises both VCC (1.8V core) and RESET IN (3.3V AFE rail) to assert unified reset if either drops below threshold during cold start or battery sag. Use Value: Prevents firmware corruption during marginal power conditions; 3µA ICC extends operational life beyond 3 years on single battery. | Use Scenario: DIN-rail mounted I/O module with isolated 5V field power and 3.3V logic domain, operating in factory ambient (–25°C to +70°C). IC Role / Device Role / Timing Role: Monitors main 5V supply and isolated 3.3V logic rail via RESET IN; asserts active-low reset to ARM Cortex-M4 during undervoltage events. Use Value: Dual-rail detection avoids silent failures where only one supply fails; ±2.5% threshold accuracy ensures consistent trip points across temperature and unit variance. |
| Automotive Body Control Units | Portable Test Equipment |
Use Scenario: BCM sub-module with 12V-to-3.3V DC/DC and 12V-to-5V DC/DC, exposed to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Uses VCC pin for 3.3V logic rail supervision and RESET IN for 5V communication rail; leverages 35µs transient immunity to ignore short dips. Use Value: Eliminates false resets during engine cranking; 140ms timeout aligns with CAN controller wake-up timing requirements. | Use Scenario: Handheld oscilloscope with dual-core SoC (1.1V core, 1.8V memory), powered by Li-ion pack with variable discharge curve. IC Role / Device Role / Timing Role: Supervises 1.1V core rail (VCC) and 1.8V I/O rail (via RESET IN resistor divider); asserts reset before brownout-induced data loss. Use Value: Factory-set 1.58V threshold matches typical 1.8V rail dropout margin; push-pull output drives reset net without pull-up loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6387LT16D3 | Same electrical specs but in 6-pin µDFN-6 (L611-1) package; larger footprint, better thermal performance. | Suitable for high-reliability industrial designs requiring enhanced thermal dissipation or board-level reworkability. | Select when PCB layout allows 1.5mm × 1.0mm footprint and thermal derating above 167.7mW is needed. |
| TLV803EB29DBVR | Single-supply reset IC (2.93V threshold), no RESET IN pin, 140ms timeout, SOT-23-3 package; 0.5µA ICC at 1.8V. | Limited to single-rail monitoring; lower current draw but lacks dual-voltage capability and temperature accuracy (±3.5%). | Choose only for cost-sensitive, single-rail applications where auxiliary monitoring is unnecessary and ultra-low ICC is critical. |
Compared with MAX6387LT16D3, the MAX6387XS16D3 saves 0.5mm² board area and suits ultra-compact designs; versus TLV803EB29DBVR, it adds essential dual-rail supervision and tighter threshold tolerance - making it irreplaceable in systems where both core and I/O supplies must be validated before boot.
Availability
MAX6387XS16D3 is available at Aetrix Electronics and suitable for battery-powered medical sensors, industrial PLC I/O modules, automotive body control units, and portable test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6387XS16D3 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 MAX6387XS16D3 belongs to the MAX6381–MAX6390 family of low-power µP supervisory circuits, engineered specifically for dual-voltage monitoring in space- and power-constrained embedded systems where reliability across –40°C to +125°C is non-negotiable.
FAQ
What is the exact reset threshold voltage of the MAX6387XS16D3?
The MAX6387XS16D3 has a factory-set VCC reset threshold of 1.58V (minimum), with nominal 1.61V and maximum 1.64V over –40°C to +125°C, achieving ±2.5% accuracy. This value is laser-trimmed during production and documented in the Reset Thresholds table of the datasheet; it applies exclusively to the VCC pin, not the RESET IN input.
Does the MAX6387XS16D3 support monitoring of a second voltage rail?
Yes, the MAX6387XS16D3 supports dual-voltage supervision via its dedicated RESET IN pin, which compares an external voltage to a precise +1.27V internal reference. When either VCC falls below 1.58V or the voltage at RESET IN drops below 1.27V, the active-low RESET output asserts - enabling coordinated reset of systems with separate core and I/O supplies.
What is the function of Pin 3 (RESET IN) on the MAX6387XS16D3?
Pin 3 of the MAX6387XS16D3 is the RESET IN terminal, a high-impedance input connected to a comparator referenced to +1.27V. It allows user-defined secondary reset detection by connecting an external resistor divider; reset asserts if the divided voltage falls below 1.27V. Input leakage is ±50nA max, permitting use of high-value resistors without accuracy loss.
What package type and dimensions does the MAX6387XS16D3 use?
The MAX6387XS16D3 is packaged in a lead-free 4-pin SC70 (X4-1) case measuring 1.0mm × 1.3mm × 0.6mm. Its pinout is VCC (Pin 1), RESET (Pin 2), RESET IN (Pin 3), and GND (Pin 4). This compact outline is defined in Maxim's package drawing 21-0098 and supports reflow soldering per JEDEC J-STD-020.
How does the reset timeout behavior work on the MAX6387XS16D3?
The MAX6387XS16D3 provides a guaranteed minimum reset timeout of 140ms after VCC or RESET IN recovers above their respective thresholds. This period begins once the monitored voltage exceeds the threshold and is generated by an internal RC timer - ensuring sufficient hold time for microprocessor initialization, regardless of supply ramp rate or temperature variation.
MAX6387XS16D3 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:
- 1.58V, Adj
- Output:
- Push-Pull, Totem Pole
- 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
MAX6387XS16D3 FAQ
1.How can I place an order for MAX6387XS16D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6387XS16D3 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 MAX6387XS16D3 reliable?
The price and inventory of MAX6387XS16D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6387XS16D3 is usually 5 days.
3.What payment methods are accepted for MAX6387XS16D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6387XS16D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6387XS16D3?
MAX6387XS16D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6387XS16D3 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 MAX6387XS16D3?
For technical support, including MAX6387XS16D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6387XS16D3 requirements.
6.How does Aetrix verify that MAX6387XS16D3 is sourced from the original manufacturer or authorized distributors?
All MAX6387XS16D3 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 MAX6387XS16D3 meets industry standards.
7.What is the process for return or replacement of MAX6387XS16D3?
All MAX6387XS16D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6387XS16D3, 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 MAX6387XS16D3 part is unused and in its original packaging.
Return procedure for MAX6387XS16D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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