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Analog Devices Inc./Maxim Integrated MAX6385XS25D5-T
- Part No.:
- MAX6385XS25D5-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS25D5-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,434
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Product details
Overview
MAX6385XS25D5-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 2.50V reset threshold, 280ms minimum VCC reset timeout, and manual reset input (MR). It monitors +1.8V to +5.0V supply rails, consumes only 3μA at +1.8V, and guarantees valid reset output down to VCC = 1V. It is used in battery-powered controllers and portable instrumentation for reliable power-up/brownout protection.
For engineers reviewing the MAX6385XS25D5-T datasheet, MAX6385XS25D5-T pinout, MAX6385XS25D5-T application, or MAX6385XS25D5-T equivalent, key selection criteria include its active-high push-pull reset output, 2.50V ±2.5% threshold accuracy over –40°C to +125°C, MR debounce capability, SC70-4 package footprint, and compatibility with dual-voltage monitoring systems requiring manual reset assertion.
Technical Context
The MAX6385XS25D5-T implements a precision voltage comparator with internal 2.50V reference and a monostable timer for reset timeout generation. Its MR input features an internal 63kΩ pullup resistor and guarantees reset assertion for ≥1µs MR pulse width while rejecting <100ns glitches.
It uses BiCMOS process technology to achieve low quiescent current (3μA at +1.8V) and stable operation across –40°C to +125°C. The device asserts RESET high when VCC falls below 2.50V or MR is pulled low, holding it high for ≥280ms after recovery - independent of VCC slew rate or noise transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.50V ±2.5% over –40°C to +125°C - ensures accurate brownout detection across automotive/industrial temperature range |
| VCC Reset Timeout | 280ms minimum - provides sufficient hold time for μP initialization before release |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| Reset Output Type | Active-high push-pull - eliminates need for external pullup and supports direct connection to μP RESET pin |
| Manual Reset Input | MR with 63kΩ internal pullup - allows momentary switch interface without external components |
| Operating Voltage Range | +1.0V to +5.5V - supports valid reset assertion even during deep brownout down to 1V rail |
| Package | 4-pin SC70 (X4+1 outline) - 1.6mm × 1.6mm footprint ideal for space-constrained portable designs |
Pinout & Package
MAX6385XS25D5-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 1.6mm × 1.6mm × 0.9mm with gull-wing leads.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor node - must be decoupled with 0.1μF capacitor near pin |
| 2 | RESET | Active-high push-pull output - drives μP RESET pin directly; sinks 1.2mA at VCC ≥ 2.5V when asserted |
| 3 | MR | Active-low manual reset input - logic low forces reset; internal 63kΩ pullup to VCC eliminates external resistor |
| 4 | GND | Analog/digital ground reference - requires low-impedance connection to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.50V with ±2.5% tolerance over full temperature range - eliminates calibration overhead in production test |
| Guaranteed reset validity | RESET output remains logic-valid down to VCC = 1V - prevents spurious release during slow power ramp-down |
| MR input immunity | 100ns glitch rejection and 1µs minimum pulse width - tolerates noisy switch bounce without false triggers |
| Negative-going transient immunity | Rejects VCC glitches ≤150µs wide when overdrive is <100mV - improves robustness in electrically noisy environments |
| Low-power operation | 3μA supply current at +1.8V - extends battery life in always-on wearable and sensor nodes |
Applications
| Portable Power Management | Industrial Controller Monitoring |
|---|---|
Use Scenario: Coin-cell–powered environmental sensor node operating on intermittent solar charging. IC Role / Device Role / Timing Role: Supervises main 3.3V LDO output and asserts active-high RESET to ARM Cortex-M0+ MCU during brownout. Use Value: 280ms timeout ensures full register initialization before firmware execution; 3μA ICC minimizes quiescent drain. | Use Scenario: PLC I/O module with dual 5V/3.3V rails and requirement for operator-initiated reset. IC Role / Device Role / Timing Role: Monitors 3.3V core rail and provides MR-driven reset via front-panel pushbutton. Use Value: Internal MR pullup eliminates BOM cost; 2.50V threshold matches 3.3V rail's 25% dropout point. |
| Battery-Powered Medical Instrument | Dual-Voltage Embedded System |
Use Scenario: Handheld glucose meter using single alkaline cell (0.9–1.6V) stepped to 3.0V. IC Role / Device Role / Timing Role: Resets microcontroller if 3.0V rail drops below 2.50V due to battery depletion or load surge. Use Value: Valid RESET assertion down to VCC = 1V prevents premature release during battery sag. | Use Scenario: FPGA-based edge AI gateway with separate 1.2V core and 3.3V I/O supplies. IC Role / Device Role / Timing Role: Primary supervisor for 3.3V I/O rail; coordinated with secondary supervisor on 1.2V rail. Use Value: Pin-compatible footprint allows reuse of layout across multiple rail-monitoring variants in family. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS25D3-T | Same 2.50V threshold and MR input, but 140ms reset timeout | Suitable where shorter reset hold time is acceptable for faster boot sequences | Select when system initialization completes in <140ms and faster wake-up is prioritized |
| TLV803EB25DBZR | 2.5V threshold, 200ms timeout, open-drain active-low output, no MR input | Lacks manual reset capability and requires external pullup; lower ICC (0.5μA) | Choose for ultra-low-power applications without manual reset need and where active-low logic is preferred |
Compared with MAX6385XS25D5-T, the MAX6385XS25D3-T reduces reset hold time by 140ms for quicker system startup, while TLV803EB25DBZR trades MR functionality and push-pull drive for sub-μA quiescent current - making it suitable only in designs that can accommodate active-low signaling and omit manual reset.
Availability
MAX6385XS25D5-T is available at Aetrix Electronics and suitable for portable medical devices, industrial controllers, battery-powered instrumentation, and embedded computing systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6385XS25D5-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 low-power, factory-trimmed μP supervisors targeting space- and power-constrained systems requiring guaranteed reset behavior across –40°C to +125°C.
FAQ
What is the exact reset threshold voltage of the MAX6385XS25D5-T?
The MAX6385XS25D5-T has a factory-set reset threshold of 2.50V, with guaranteed accuracy of ±2.5% over the full operating temperature range of –40°C to +125°C. This value is confirmed in the Reset Thresholds table of the datasheet (suffix "25" corresponds to nominal 2.50V), and applies specifically to the MAX6385XS25D5-T variant - not inferred from adjacent part numbers.
Does the MAX6385XS25D5-T support manual reset functionality?
Yes, the MAX6385XS25D5-T includes a debounced manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. Driving MR low forces an active-high reset assertion, which remains active for the full 280ms timeout after MR is released. This feature is explicitly documented in the Pin Description and Features sections for MAX6384/MAX6385/MAX6386 variants.
What package type and dimensions does the MAX6385XS25D5-T use?
The MAX6385XS25D5-T is packaged in a 4-pin SC70 (X4+1 outline), measuring 1.6mm × 1.6mm × 0.9mm with gull-wing leads. This is confirmed in the Ordering Information table and Package Information section, where "XS" denotes the 4-pin SC70 option for MAX6384–MAX6390 series - distinct from 3-pin SC70 or 6-pin μDFN variants.
Can the MAX6385XS25D5-T operate reliably at VCC = 1.0V?
Yes, the MAX6385XS25D5-T guarantees correct reset output logic state down to VCC = 1.0V, as stated in the Electrical Characteristics table under "Reset Output State Guaranteed Valid Down to VCC = 1V". This ensures deterministic behavior during deep brownout conditions where other supervisors may release reset prematurely.
Is the MAX6385XS25D5-T pin-compatible with older Maxim reset ICs like MAX809?
Yes, the MAX6385XS25D5-T is explicitly listed as pin-compatible with MAX809/MAX810/MAX803 and other legacy supervisors in the Features section. This compatibility applies to the 4-pin SC70 package variant and covers identical pin functions (VCC, RESET, MR, GND), enabling drop-in replacement in existing layouts without PCB revision.
MAX6385XS25D5-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:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.5V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 280ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS25D5-T FAQ
1.How can I place an order for MAX6385XS25D5-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS25D5-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 MAX6385XS25D5-T reliable?
The price and inventory of MAX6385XS25D5-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS25D5-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS25D5-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS25D5-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS25D5-T?
MAX6385XS25D5-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS25D5-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 MAX6385XS25D5-T?
For technical support, including MAX6385XS25D5-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS25D5-T requirements.
6.How does Aetrix verify that MAX6385XS25D5-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS25D5-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 MAX6385XS25D5-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS25D5-T?
All MAX6385XS25D5-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS25D5-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 MAX6385XS25D5-T part is unused and in its original packaging.
Return procedure for MAX6385XS25D5-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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