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Analog Devices Inc./Maxim Integrated MAX6387XS42D2-T
- Part No.:
- MAX6387XS42D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6387XS42D2-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,111
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Product details
Overview
MAX6387XS42D2-T from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with active-low push-pull reset output, 4.20V factory-set VCC reset threshold, and 20ms minimum reset timeout period. It monitors both VCC and an auxiliary voltage via RESET IN input, consumes only 3μA at +1.8V, and operates over -40°C to +125°C for use in battery-powered industrial controllers and dual-rail embedded systems.
For engineers reviewing the MAX6387XS42D2-T datasheet, MAX6387XS42D2-T pinout, MAX6387XS42D2-T application, or MAX6387XS42D2-T equivalent, key selection criteria include its ±2.5% reset threshold accuracy over temperature, guaranteed reset validity down to VCC = 1V, 4-pin SC70 package compatibility, and auxiliary voltage monitoring capability for multi-supply systems.
Technical Context
The MAX6387XS42D2-T integrates two independent reset comparators: one fixed at 4.20V for VCC monitoring and another referenced to +1.27V for external resistor-divider–based RESET IN voltage detection. Reset asserts when either monitored voltage falls below its threshold and remains asserted for 20ms after recovery.
It features a push-pull active-low RESET output capable of sinking 1.2mA at VCC ≥ 2.5V with VOL ≤ 0.3V, and includes no manual reset (MR) input-distinguishing it from MAX6384/MAX6385/MAX6390 variants-while supporting negative-going VCC transient immunity up to 100mV overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.20V (±2.5% over -40°C to +125°C); sets power-fail detection point for primary supply |
| RESET Timeout Period | 20ms (min); ensures μP remains held in reset long enough for stable power recovery |
| Supply Current | 3μA at +1.8V; enables ultra-low-power operation in battery-backed systems |
| RESET Output Type | Active-low push-pull; eliminates need for external pullup and drives logic directly |
| Auxiliary Input | RESET IN comparator referenced to +1.27V; supports user-defined secondary voltage monitoring |
| Operating Temperature | -40°C to +125°C; qualified for automotive and industrial under-hood/enclosure environments |
| VCC Range | 1.0V to 5.5V; guarantees valid RESET state even during deep brownout conditions |
Pinout & Package
MAX6387XS42D2-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098), 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 | Primary supply input and monitored voltage source for fixed 4.20V reset threshold |
| 2 | RESET | Active-low push-pull output; drives low during reset assertion, high otherwise |
| 3 | GND | Ground reference for all internal circuitry and comparator inputs |
| 4 | RESET IN | High-impedance auxiliary input; compared to +1.27V reference for secondary voltage monitoring |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneous monitoring of VCC (4.20V) and external voltage via RESET IN with ±50nA leakage |
| Low-power operation | 3μA supply current at +1.8V enables >10-year battery life in coin-cell–powered IoT nodes |
| Reset validity guarantee | RESET output state remains valid down to VCC = 1.0V, ensuring deterministic behavior during brownout |
| Negative transient immunity | Immune to VCC glitches ≤100mV amplitude and <35µs duration, reducing false resets |
| Factory-trimmed accuracy | ±2.5% reset threshold tolerance across full temperature range eliminates external calibration |
Applications
| Industrial PLC I/O Module | Battery-Powered Data Logger |
|---|---|
Use Scenario: Monitors 3.3V I/O rail and 5V analog front-end supply in programmable logic controller modules exposed to wide ambient temperatures. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting reset if either rail drops below safe operating level, with 20ms timeout ensuring firmware reload stability. Use Value: Prevents corrupted register writes during partial power loss, leveraging RESET IN to detect analog supply sag before ADC errors occur. | Use Scenario: Powers sensor acquisition and BLE transmission in remote environmental monitoring units powered by CR2032 coin cells. IC Role / Device Role / Timing Role: Supervises main 3.0V system rail and backup 1.8V real-time clock supply, enabling graceful shutdown and wake-up sequence control. Use Value: 3μA quiescent current extends battery life beyond 5 years; 4.20V threshold prevents reset during normal 3.0V operation while catching critical overvoltage events. |
| Dual-Rail FPGA Configuration | Automotive Body Control Module |
Use Scenario: Ensures reliable configuration of Xilinx Spartan-7 FPGA requiring coordinated 1.0V core and 3.3V I/O supply sequencing. IC Role / Device Role / Timing Role: Uses RESET IN to monitor I/O rail while VCC tracks core rail, generating unified reset pulse only when both are stable. Use Value: Eliminates need for discrete RC timing networks; 20ms timeout matches FPGA configuration clock startup requirements. | Use Scenario: Supervises 5V infotainment domain controller and 12V-to-5V DC-DC converter output in AEC-Q100–qualified body electronics. IC Role / Device Role / Timing Role: Monitors primary 5V rail (VCC) and secondary 5V isolated supply (via RESET IN) to detect cross-coupling faults or regulator failure. Use Value: -40°C to +125°C operation and ±2.5% threshold accuracy ensure reliability in under-hood thermal cycling without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6387LT42D2-T | Same electrical specs but in 6-pin μDFN (L611+1) package; higher thermal resistance (θJA = 477°C/W) | Suitable for space-constrained PCBs where SC70 footprint is unavailable; requires different land pattern | Select when board layout allows larger 2mm × 2mm μDFN and thermal dissipation margin exists |
| TLV803E42DBZR | Single-supply reset IC (no RESET IN), 4.2V threshold, 20ms timeout, SOT-23-3 package, 0.5μA ICC | Lacks auxiliary voltage monitoring; lower quiescent current but no dual-rail capability | Choose for cost-sensitive single-rail designs where RESET IN functionality is unnecessary |
Compared with MAX6387XS42D2-T, the μDFN variant offers identical supervision performance in a larger footprint better suited for thermal management, while TLV803E42DBZR reduces cost and power at the expense of dual-voltage monitoring-making it viable only when secondary supply supervision is omitted from system architecture.
Availability
MAX6387XS42D2-T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, battery-powered data loggers, dual-rail FPGA configurations, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6387XS42D2-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 industrial, automotive, and communications applications.
The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy reset supervision for systems demanding dual-voltage monitoring, extended temperature operation, and minimal board space-targeting battery-powered instrumentation and safety-critical embedded controllers.
FAQ
What is the exact reset threshold voltage of MAX6387XS42D2-T and how accurate is it over temperature?
The MAX6387XS42D2-T has a factory-set VCC reset threshold of 4.20V, with guaranteed accuracy of ±2.5% over the full operating temperature range of -40°C to +125°C. This specification ensures reliable power-fail detection without external trimming, and the threshold is validated per Maxim's production test flow-not derived from typical values or design estimates. The MAX6387XS42D2-T maintains this tolerance across all production lots.
Does MAX6387XS42D2-T support manual reset functionality?
No, the MAX6387XS42D2-T does not include a manual reset (MR) input. Per the Maxim datasheet selector guide and pin configuration diagrams, MR is present only on MAX6384/MAX6385/MAX6386/MAX6390 variants. The MAX6387XS42D2-T is specifically configured for dual-voltage supervision only-VCC and RESET IN-with no provision for external reset initiation. This simplifies layout and reduces pin count in applications where manual reset is unnecessary.
What is the function of the RESET IN pin on MAX6387XS42D2-T and what voltage range can it monitor?
The RESET IN pin on MAX6387XS42D2-T connects to an internal +1.27V reference comparator, enabling user-defined secondary voltage monitoring via an external resistor divider. It accepts input voltages from 0V to VCC, with leakage current limited to ±50nA, allowing high-impedance divider networks. The MAX6387XS42D2-T asserts reset if either VCC falls below 4.20V or RESET IN falls below +1.27V, making it ideal for dual-rail systems like FPGA core/I/O supplies.
Can MAX6387XS42D2-T operate reliably at VCC = 1.0V?
Yes, the MAX6387XS42D2-T guarantees correct RESET output logic state down to VCC = 1.0V, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. Its push-pull output remains functional with VOL ≤ 0.3V at ISINK = 80µA when VCC ≥ 1.0V, ensuring deterministic reset signaling during deep brownout conditions-critical for fail-safe shutdown in battery-depleted systems. This behavior is intrinsic to the MAX6387XS42D2-T design and tested across temperature.
Is MAX6387XS42D2-T pin-compatible with other devices in the MAX6381–MAX6390 family?
The MAX6387XS42D2-T shares the same 4-pin SC70 pinout (VCC, RESET, GND, RESET IN) with MAX6387/MAX6388/MAX6389 variants in XS package format, but is not pin-compatible with 3-pin SC70 (MAX6381–MAX6383) or 6-pin μDFN versions. Pin compatibility is strictly limited to same-package variants-e.g., MAX6387XS42D2-T and MAX6387XS30D2-T-due to differing pin functions (e.g., MR vs. RESET IN). Always verify pin mapping using the official Maxim pin configuration diagrams for MAX6387XS42D2-T.
MAX6387XS42D2-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:
- 4.2V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6387XS42D2-T FAQ
1.How can I place an order for MAX6387XS42D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6387XS42D2-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 MAX6387XS42D2-T reliable?
The price and inventory of MAX6387XS42D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6387XS42D2-T is usually 5 days.
3.What payment methods are accepted for MAX6387XS42D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6387XS42D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6387XS42D2-T?
MAX6387XS42D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6387XS42D2-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 MAX6387XS42D2-T?
For technical support, including MAX6387XS42D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6387XS42D2-T requirements.
6.How does Aetrix verify that MAX6387XS42D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6387XS42D2-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 MAX6387XS42D2-T meets industry standards.
7.What is the process for return or replacement of MAX6387XS42D2-T?
All MAX6387XS42D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6387XS42D2-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 MAX6387XS42D2-T part is unused and in its original packaging.
Return procedure for MAX6387XS42D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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