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Analog Devices Inc./Maxim Integrated MAX6387XS17D3-T
- Part No.:
- MAX6387XS17D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6387XS17D3-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,793
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Product details
Overview
MAX6387XS17D3-T from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with active-low push-pull reset output, 1.67V factory-set VCC reset threshold (±2.5% over -40°C to +125°C), 140ms minimum VCC reset timeout, and auxiliary RESET IN input for monitoring a second voltage source. It consumes only 3μA at +1.8V and operates down to VCC = 1.0V, used in battery-powered instrumentation and dual-rail embedded systems requiring reliable power-on reset and brownout detection.
For engineers reviewing the MAX6387XS17D3-T datasheet, MAX6387XS17D3-T pinout, MAX6387XS17D3-T application, or MAX6387XS17D3-T equivalent, key selection criteria include its 4-pin SC70 package, dual-monitoring capability via RESET IN, guaranteed reset assertion down to 1V supply, ±2.5% threshold accuracy over temperature, and compatibility with low-power μP-based designs requiring precise timing and low quiescent current.
Technical Context
The MAX6387XS17D3-T integrates two independent voltage comparators: one monitors VCC against a fixed 1.67V threshold, while the other compares an external voltage applied to RESET IN against an internal 1.27V reference. A digital timeout counter ensures reset remains asserted for ≥140ms after VCC or RESET IN recovers above their respective thresholds.
Its push-pull active-low RESET output drives directly without external pullup, supports sink currents up to 3.2mA at VCC ≥ 4.5V, and guarantees valid logic state for VCC ≥ 1.0V. The device uses BiCMOS process technology and is rated for operation from -40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 1.67V (±2.5% over -40°C to +125°C) - sets precise brownout detection point for primary supply |
| RESET Timeout Period | 140ms (min) - ensures sufficient reset hold time for slow-ramping μP clock domains |
| Supply Current | 3μA at +1.8V - enables multi-year battery life in portable monitoring devices |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout conditions |
| RESET IN Threshold | 1.27V (±2.5% over -40°C to +125°C) - enables user-configurable secondary supply monitoring via resistor divider |
| Reset Output Type | Active-low push-pull - eliminates need for external pullup resistor, reduces BOM count |
| Package | 4-pin SC70 - compact footprint (1.3mm × 1.6mm) for space-constrained PCB layouts |
Pinout & Package
MAX6387XS17D3-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 1.3mm × 1.6mm × 0.95mm, with thermal resistance θJA = 322.6°C/W on multilayer board.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor source; powers internal circuitry and defines reset threshold reference |
| 2 | RESET | Active-low push-pull reset output; asserts low during VCC or RESET IN undervoltage and holds for ≥140ms post-recovery |
| 3 | RESET IN | Auxiliary voltage monitor input; compared to internal 1.27V reference to enable dual-supply supervision |
| 4 | GND | Analog/digital ground reference; must be connected to system ground plane for accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of VCC and external rail via RESET IN enables robust dual-rail system reset sequencing |
| Guaranteed reset validity down to VCC = 1.0V | Ensures deterministic μP initialization even during severe brownout events before full power-up |
| Factory-trimmed ±2.5% threshold accuracy | Eliminates need for external calibration in automotive and industrial applications across full temperature range |
| Low 3μA supply current at 1.8V | Extends battery runtime in portable medical sensors and IoT edge nodes without compromising supervision reliability |
| Push-pull active-low RESET output | Direct drive capability simplifies interface to μP reset inputs and avoids pullup resistor tolerance drift effects |
Applications
| Portable Medical Sensors | Dual-Rail Industrial Controllers |
|---|---|
Use Scenario: Battery-powered glucose meters and pulse oximeters requiring long shelf life and reliable startup under varying battery discharge profiles. IC Role / Device Role / Timing Role: Supervises main 3.3V logic rail and 1.8V analog sensor rail via RESET IN; asserts reset until both supplies stabilize. Use Value: Prevents corrupted ADC readings or EEPROM writes during marginal battery conditions by enforcing 140ms minimum reset hold time. | Use Scenario: PLC I/O modules with separate 24V field power and 3.3V logic supply, where loss of either rail must trigger system halt. IC Role / Device Role / Timing Role: Monitors 3.3V VCC and scaled-down 24V field supply (via resistor divider on RESET IN) to detect independent rail failures. Use Value: Enables single-chip dual-supply fault detection without discrete comparators, reducing component count and layout area. |
| Automotive Body Control Modules | Low-Power IoT Edge Nodes |
Use Scenario: BCM sub-modules powered from vehicle battery (9–16V) with internal LDO generating 1.67V reference rail for MCU core. IC Role / Device Role / Timing Role: Uses VCC pin to monitor LDO output and RESET IN to verify upstream battery voltage integrity via resistive divider. Use Value: Meets AEC-Q100 requirements for supply monitoring redundancy and provides fail-safe reset assertion during cold-crank transients. | Use Scenario: Wireless sensor nodes powered by coin-cell batteries, operating intermittently to conserve energy. IC Role / Device Role / Timing Role: Supervises 1.8V MCU supply and 3.0V RF transceiver supply; RESET IN configured for 3.0V rail monitoring. Use Value: Ultra-low 3μA quiescent current extends operational lifetime while ensuring clean wake-up from deep sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6387LT17D3-T | Same electrical specs but in 6-pin μDFN package; higher thermal resistance (θJA = 477°C/W) | Better suited for high-density layouts where SC70 solderability is challenging; requires different land pattern | Select when board assembly process favors μDFN or when thermal dissipation margin is acceptable |
| TPS3808G16DBVR | 1.6V threshold (±0.5%), 200ms timeout, 1.4μA ICC, open-drain output; no RESET IN input | Lacks auxiliary voltage monitoring; requires external pullup; tighter threshold tolerance but single-rail only | Choose when only VCC supervision is needed and lowest possible quiescent current is critical |
Compared with MAX6387XS17D3-T, the LT17D3-T offers identical functionality in a larger μDFN package for improved thermal performance, while the TPS3808G16DBVR trades dual-monitoring capability for lower power and tighter threshold accuracy-making it suitable only for single-rail applications where RESET IN is unnecessary.
Availability
MAX6387XS17D3-T is available at Aetrix Electronics and suitable for portable medical sensors, dual-rail industrial controllers, automotive body control modules, and low-power IoT edge nodes requiring stable component supply and long-term lifecycle support.
Supply support for MAX6387XS17D3-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 ultra-low-power, high-accuracy microprocessor supervisory circuits optimized for battery-operated and dual-supply embedded systems requiring guaranteed reset behavior across extreme temperatures.
FAQ
What is the exact reset threshold voltage of MAX6387XS17D3-T and how stable is it over temperature?
The MAX6387XS17D3-T has a factory-set VCC reset threshold of 1.67V, with guaranteed accuracy of ±2.5% over the full operating temperature range of -40°C to +125°C. This stability is achieved through laser-trimming during production and confirmed by design validation per JEDEC JESD22-A108. The MAX6387XS17D3-T maintains this specification without external calibration components.
Does MAX6387XS17D3-T support monitoring of a second voltage rail, and how is it implemented?
Yes, MAX6387XS17D3-T supports dual-voltage monitoring via its dedicated RESET IN pin, which compares an external voltage to an internal 1.27V reference. To supervise a second rail, connect a resistor divider between that rail and GND, feeding the midpoint to RESET IN. The MAX6387XS17D3-T asserts reset if either VCC falls below 1.67V or the voltage at RESET IN drops below 1.27V.
What is the function of the RESET output on MAX6387XS17D3-T, and what load can it drive?
The RESET output of MAX6387XS17D3-T is an active-low push-pull driver capable of sinking up to 3.2mA at VCC ≥ 4.5V, 1.2mA at VCC ≥ 2.5V, or 80µA at VCC ≥ 1.0V, with VOL ≤ 0.4V. It requires no external pullup resistor and guarantees correct logic state down to VCC = 1.0V, making the MAX6387XS17D3-T suitable for direct connection to μP reset inputs in low-voltage systems.
Can MAX6387XS17D3-T operate from a 1.0V supply, and what happens to the reset output at that level?
Yes, MAX6387XS17D3-T is fully specified to operate with VCC as low as 1.0V. Its RESET output remains functional and guaranteed to be in the correct asserted (low) or deasserted (high) logic state throughout this range. At VCC = 1.0V, the MAX6387XS17D3-T still sinks 80µA with VOL ≤ 0.3V, ensuring reliable reset signaling even during deep brownout conditions before full power-up.
What package type and dimensions does MAX6387XS17D3-T use, and is it RoHS-compliant?
MAX6387XS17D3-T uses a 4-pin SC70 package (outline 21-0098), measuring 1.3mm × 1.6mm × 0.95mm, with lead-free/RoHS-compliant termination indicated by the "+T" suffix. The package features gull-wing leads compatible with standard reflow soldering processes and has a thermal resistance θJA of 322.6°C/W on a multilayer PCB, as verified per JEDEC JESD51-7.
MAX6387XS17D3-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:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.67V, 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
MAX6387XS17D3-T FAQ
1.How can I place an order for MAX6387XS17D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6387XS17D3-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 MAX6387XS17D3-T reliable?
The price and inventory of MAX6387XS17D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6387XS17D3-T is usually 5 days.
3.What payment methods are accepted for MAX6387XS17D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6387XS17D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6387XS17D3-T?
MAX6387XS17D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6387XS17D3-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 MAX6387XS17D3-T?
For technical support, including MAX6387XS17D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6387XS17D3-T requirements.
6.How does Aetrix verify that MAX6387XS17D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6387XS17D3-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 MAX6387XS17D3-T meets industry standards.
7.What is the process for return or replacement of MAX6387XS17D3-T?
All MAX6387XS17D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6387XS17D3-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 MAX6387XS17D3-T part is unused and in its original packaging.
Return procedure for MAX6387XS17D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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