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Analog Devices Inc./Maxim Integrated MAX6387XS23D3-T
- Part No.:
- MAX6387XS23D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6387XS23D3-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:9,905
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Product details
Overview
MAX6387XS23D3-T from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with active-low push-pull reset output, factory-set 2.31V 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, serving in power-critical embedded systems requiring reliable brownout detection and dual-rail supervision.
For engineers reviewing the MAX6387XS23D3-T datasheet, MAX6387XS23D3-T pinout, MAX6387XS23D3-T application, or MAX6387XS23D3-T equivalent, key selection criteria include its 4-pin SC70 package, dual-supply monitoring capability, guaranteed reset validity at low VCC, ±2.5% threshold accuracy across automotive temperature range, and compatibility with systems needing manual-reset-free supervision with auxiliary voltage tracking.
Technical Context
The MAX6387XS23D3-T integrates two independent reset comparators: one monitors VCC against a precision 2.31V internal threshold, while the second compares an external voltage applied to RESET IN against a stable +1.27V reference. Its reset assertion logic triggers on either comparator violation and holds reset active for a fixed 140ms after recovery.
This device uses BiCMOS process technology to achieve ultra-low quiescent current (3μA at 1.8V) while maintaining robust noise immunity-including negative-going VCC transient rejection-and guaranteed reset output state validity down to VCC = 1.0V without external biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.31V (nominal), ±2.5% tolerance over −40°C to +125°C - ensures accurate brownout detection across automotive temperature range |
| RESET Timeout Period | 140ms (min) - guarantees sufficient processor hold time during power recovery |
| Supply Current | 3μA at +1.8V - enables multi-year battery operation in portable equipment |
| 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 temp) - allows precise user-defined secondary supply monitoring via resistor divider |
| Reset Output Type | Active-low push-pull - eliminates need for external pullup and drives standard CMOS/TTL inputs directly |
| Package | 4-pin SC70 (X4+1 outline) - compact footprint compatible with space-constrained PCB layouts |
Pinout & Package
MAX6387XS23D3-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, 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 node - powers internal circuitry and sets reset trigger point |
| 2 | RESET | Active-low push-pull output - asserts low during fault and remains low for full 140ms timeout after recovery |
| 3 | RESET IN | Auxiliary voltage monitor input - high-impedance node compared to +1.27V reference; enables dual-rail 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 reset comparators | Simultaneous monitoring of VCC and external voltage (via RESET IN) prevents undetected failure in split-rail systems |
| Factory-trimmed reset threshold | 2.31V ±2.5% over −40°C to +125°C eliminates need for external calibration or trimming components |
| Guaranteed reset validity down to VCC = 1.0V | Ensures deterministic μP initialization even during severe brownout - no external pulldown required |
| Negative-going VCC transient immunity | Rejects short-duration glitches (e.g., <1µs at 100mV overdrive) without false triggering |
| Ultra-low supply current | 3μA at +1.8V enables use in energy-harvesting and long-life battery applications |
Applications
| Industrial PLC Power Management | Automotive Body Control Module |
|---|---|
Use Scenario: Monitoring both 5V system rail and 3.3V I/O rail in programmable logic controllers subject to load switching transients. IC Role / Device Role / Timing Role: Dual-voltage supervisor asserting synchronized reset when either rail drops below safe operating level. Use Value: Prevents firmware corruption during rail collapse by guaranteeing 140ms reset hold time and rejecting sub-microsecond VCC glitches. | Use Scenario: Supervising MCU core voltage (1.2V–1.8V) and CAN transceiver supply (5V) in body electronics modules. IC Role / Device Role / Timing Role: Primary reset generator using VCC input for core rail, with RESET IN configured via resistor divider to monitor 5V CAN bus supply. Use Value: Enables single-chip dual-rail supervision meeting AEC-Q100 requirements without discrete comparators or timing RC networks. |
| Medical Wearable Sensor Hub | Industrial IoT Edge Node |
Use Scenario: Battery-powered wearable collecting ECG/PPG data, where main SoC runs at 1.8V and sensor interface operates at 3.0V. IC Role / Device Role / Timing Role: Low-power supervisor ensuring clean boot sequence and brownout recovery for both voltage domains. Use Value: 3μA quiescent current extends battery life; 2.31V VCC threshold matches typical Li-ion discharge curve inflection point. | Use Scenario: Wireless sensor node powered by energy harvesting (e.g., solar + supercapacitor), with variable VCC and regulated 3.3V subsystem. IC Role / Device Role / Timing Role: Dual-threshold detector using VCC for raw input monitoring and RESET IN for regulated output supervision. Use Value: Eliminates need for separate supervisors per rail, reducing BOM count and PCB area in size-constrained edge devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6387LT23D3-T | Same electrical specs but in 6-pin μDFN (L611+1) instead of 4-pin SC70 - larger footprint, lower θJA (477°C/W vs. 322.6°C/W) | Preferred for thermally demanding environments or when μDFN layout is already standardized | Select when board space allows larger package and thermal performance outweighs size constraints |
| TPS3808G33DBVR | TI part with 3.3V fixed threshold, 200ms timeout, 1.6μA ICC at 3.3V - lacks RESET IN input and dual-monitoring capability | Suitable only for single-rail 3.3V systems; no auxiliary voltage monitoring | Choose only if application requires only VCC supervision and lower quiescent current is critical |
Compared with MAX6387XS23D3-T, the LT23D3-T offers identical functionality in a thermally superior but physically larger μDFN package, while the TPS3808G33DBVR provides lower ICC but sacrifices dual-voltage monitoring - making MAX6387XS23D3-T uniquely suited for compact dual-rail designs requiring guaranteed 140ms reset hold and 2.31V precision threshold.
Availability
MAX6387XS23D3-T is available at Aetrix Electronics and suitable for industrial PLC power management, automotive body control modules, medical wearable sensor hubs, and industrial IoT edge nodes requiring stable component supply and AEC-Q100-aligned reliability.
Supply support for MAX6387XS23D3-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 industrial, automotive, and computing applications, emphasizing low power, high reliability, and small form factor.
The MAX6381–MAX6390 family delivers ultra-low-power microprocessor supervisory circuits optimized for dual-voltage monitoring in space- and energy-constrained embedded systems, with emphasis on automotive-grade temperature operation and glitch-immune reset generation.
FAQ
What is the exact reset threshold voltage of the MAX6387XS23D3-T?
The MAX6387XS23D3-T has a factory-set VCC reset threshold of 2.31V (nominal), with ±2.5% tolerance over the full −40°C to +125°C operating temperature range. This value is confirmed in the Reset Thresholds table of the datasheet (suffix "23"), and applies specifically to the VCC comparator - not the auxiliary RESET IN input, which references +1.27V internally.
Does the MAX6387XS23D3-T support manual reset functionality?
No, the MAX6387XS23D3-T does not include a manual reset (MR) input. Per the Selector Guide and Pin Configurations, MR is only present on MAX6384/MAX6385/MAX6386/MAX6390 variants. The MAX6387XS23D3-T features RESET IN for auxiliary voltage monitoring but no MR pin - its reset is triggered solely by VCC or RESET IN violations.
What package type and dimensions does the MAX6387XS23D3-T use?
The MAX6387XS23D3-T is supplied in a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. It is RoHS-compliant ("+T" suffix), rated for −40°C to +125°C operation, and has thermal resistance θJA = 322.6°C/W on a multilayer PCB - distinct from the 6-pin μDFN variant (MAX6387LT23D3-T).
Can the MAX6387XS23D3-T monitor two different voltage rails simultaneously?
Yes, the MAX6387XS23D3-T provides true dual-rail supervision: its VCC pin monitors the primary supply (e.g., 2.31V threshold), while the RESET IN pin accepts an externally derived voltage (e.g., from a resistor divider) and compares it to an internal +1.27V reference. Reset asserts if either voltage falls below its respective threshold - enabling coordinated reset for core and I/O rails in a single device.
What is the guaranteed minimum reset timeout period for the MAX6387XS23D3-T?
The MAX6387XS23D3-T guarantees a minimum reset timeout period of 140ms after VCC or RESET IN recovers above their thresholds. This value corresponds to the "D3" suffix in the part number and is specified in the Reset Timeout Delay table. The actual timeout may extend up to 280ms (max) depending on process and temperature variation, but the 140ms minimum ensures sufficient hold time for all supported microprocessors.
MAX6387XS23D3-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:
- 2.31V, 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
MAX6387XS23D3-T FAQ
1.How can I place an order for MAX6387XS23D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6387XS23D3-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 MAX6387XS23D3-T reliable?
The price and inventory of MAX6387XS23D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6387XS23D3-T is usually 5 days.
3.What payment methods are accepted for MAX6387XS23D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6387XS23D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6387XS23D3-T?
MAX6387XS23D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6387XS23D3-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 MAX6387XS23D3-T?
For technical support, including MAX6387XS23D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6387XS23D3-T requirements.
6.How does Aetrix verify that MAX6387XS23D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6387XS23D3-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 MAX6387XS23D3-T meets industry standards.
7.What is the process for return or replacement of MAX6387XS23D3-T?
All MAX6387XS23D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6387XS23D3-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 MAX6387XS23D3-T part is unused and in its original packaging.
Return procedure for MAX6387XS23D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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