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Analog Devices Inc./Maxim Integrated MAX6385XS25D3-T
- Part No.:
- MAX6385XS25D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS25D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,544
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Product details
Overview
MAX6385XS25D3-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.50V reset threshold (±2.5% over –40°C to +125°C), 140ms minimum VCC reset timeout, and integrated debounced manual reset input (MR). It monitors single-supply voltages from +1.8V to +5.0V and guarantees valid reset state down to VCC = 1.0V, used in battery-powered controllers and critical μP power-up sequencing.
For engineers reviewing the MAX6385XS25D3-T datasheet, MAX6385XS25D3-T pinout, MAX6385XS25D3-T application, or MAX6385XS25D3-T equivalent, key selection criteria include reset threshold accuracy, MR input pullup resistance (63kΩ), SC70-4 package footprint, and compatibility with dual-voltage systems requiring guaranteed reset assertion during brownout.
Technical Context
The MAX6385XS25D3-T implements a precision bandgap-based voltage comparator for VCC monitoring, paired with a temperature-stable internal timer for deterministic 140ms reset timeout after VCC recovery. Its MR input features internal 63kΩ pullup and 1µs minimum pulse width support, enabling direct connection to momentary switches without external debounce.
This device belongs to the MAX6384–MAX6390 family with 4-pin SC70 packaging, active-high push-pull RESET output logic, and no auxiliary RESET IN functionality-distinguishing it from MAX6387/MAX6388 variants. It operates across –40°C to +125°C and consumes only 3µA at +1.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.50V ±2.5% (–40°C to +125°C); ensures reliable detection of 2.5V rail brownout |
| Reset Timeout | 140ms min; holds μP in reset long enough for stable 2.5V supply recovery |
| Supply Current | 3µA at +1.8V; enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Voltage | +1.0V to +5.5V; supports valid reset assertion even during deep brownout |
| MR Pullup Resistance | 63kΩ; allows direct switch-to-GND interface without external components |
| Output Type | Active-high push-pull; drives high during reset, eliminating need for external pullup |
| Temp Range | –40°C to +125°C; qualified for automotive under-hood and industrial control environments |
Pinout & Package
MAX6385XS25D3-T uses a 4-pin SC70 package (outline 21-0098, land pattern 90-0187), surface-mount, RoHS-compliant, with 0.65mm pitch and 1.6mm × 1.6mm body size.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input; monitored for reset threshold violation and powers internal circuitry |
| 2 | RESET | Active-high push-pull output; asserts high during reset, deasserts low when VCC > 2.50V for ≥140ms |
| 3 | MR | Active-low manual reset input; internal 63kΩ pullup to VCC; reset asserted while MR < 0.3×VCC |
| 4 | GND | Ground reference for all internal comparators, timers, and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.50V with ±2.5% tolerance over full temperature range eliminates external resistor divider |
| Deterministic reset timeout | 140ms minimum ensures μP remains held until 2.5V rail stabilizes post-brownout |
| Integrated MR pullup | 63kΩ internal resistor enables single-switch manual reset without BOM additions |
| Low-VCC reset validity | Guaranteed correct RESET logic state down to VCC = 1.0V prevents spurious release |
| Negative transient immunity | Rejects sub-10µs VCC glitches below threshold, improving noise robustness in noisy environments |
Applications
| Battery-Powered Controllers | Industrial Microcontroller Systems |
|---|---|
Use Scenario: Remote sensor node powered by CR2032 coin cell with 2.5V LDO regulator. IC Role / Device Role / Timing Role: Monitors 2.5V rail and asserts active-high RESET to ARM Cortex-M0+ during brownout or cold start. Use Value: 3µA quiescent current extends battery life beyond 5 years; 140ms timeout prevents premature firmware execution before LDO stabilization. | Use Scenario: PLC I/O module with isolated 2.5V core supply and real-time watchdog requirements. IC Role / Device Role / Timing Role: Provides power-on reset and manual reset via front-panel button, interfacing directly with μC reset pin. Use Value: MR's 63kΩ pullup eliminates external resistor; ±2.5% threshold accuracy ensures consistent behavior across –40°C to +85°C operating range. |
| Automotive Body Control Modules | Dual-Voltage Embedded Systems |
Use Scenario: Under-dash BCM using 2.5V microcontroller core supplied from switched 12V rail. IC Role / Device Role / Timing Role: Supervises 2.5V domain and generates clean reset pulse on ignition cycle transitions. Use Value: AEC-Q100–qualified variant available; 125°C rating supports under-hood thermal margins; negative transient immunity suppresses alternator noise-induced resets. | Use Scenario: FPGA-based data acquisition board with separate 2.5V core and 3.3V I/O supplies. IC Role / Device Role / Timing Role: Primary supervisor for 2.5V core rail; RESET signal synchronized to FPGA configuration sequence. Use Value: Active-high push-pull output interfaces directly with FPGA PROG_B pin; no level-shifting or pullup required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385LT25D3-T | Same electrical specs but in 6-pin µDFN (1.5mm × 1.5mm) instead of 4-pin SC70 (1.6mm × 1.6mm) | Requires different PCB footprint and reflow profile; better thermal dissipation (θJA = 477°C/W vs. 322.6°C/W) | Select for space-constrained layouts needing higher power density or improved thermal performance |
| TPS3808G25DBVR | 2.5V threshold, 140ms timeout, but active-low open-drain output and 1.8V–6.0V VCC range | Requires external pullup resistor; supports wider input voltage; lacks integrated MR pullup (needs external 100kΩ) | Select when open-drain flexibility is needed or when sourcing from TI-authorized channels with volume pricing |
Compared with MAX6385XS25D3-T, the LT25D3-T offers identical functionality in a smaller µDFN package but demands layout revision, while TPS3808G25DBVR provides broader VCC range and open-drain versatility at the cost of added BOM components and different reset polarity.
Availability
MAX6385XS25D3-T is available at Aetrix Electronics and suitable for battery-powered controllers, industrial microcontroller systems, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for MAX6385XS25D3-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, factory-trimmed supervisory circuits optimized for reliable μP reset generation in space- and power-constrained embedded systems.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6385XS25D3-T?
The MAX6385XS25D3-T has a factory-set reset threshold of 2.50V with ±2.5% tolerance over the full operating temperature range (–40°C to +125°C). This value is laser-trimmed during production and specified in the Electrical Characteristics table under "VCC Reset Threshold" with min/typ/max columns confirming 2.44V/2.50V/2.56V at +25°C and maintained within ±2.5% across temperature.
Does MAX6385XS25D3-T support manual reset, and how is the MR pin configured?
Yes, MAX6385XS25D3-T includes a debounced manual reset input (MR) on Pin 3. It features an internal 63kΩ pullup resistor to VCC, so MR is logic-high by default. Driving MR low (to GND or <0.3×VCC) asserts RESET high for the full 140ms timeout period after MR is released. No external components are required for basic switch interfacing.
What package type and dimensions does MAX6385XS25D3-T use?
MAX6385XS25D3-T uses a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 1.6mm × 1.6mm with 0.65mm pin pitch. It is RoHS-compliant (+ suffix), surface-mount, and thermally rated for θJA = 322.6°C/W on multilayer PCBs per JEDEC JESD51-7.
Can MAX6385XS25D3-T operate reliably at VCC = 1.0V?
Yes, MAX6385XS25D3-T guarantees correct RESET output logic state down to VCC = 1.0V. The datasheet specifies "Reset Output State Guaranteed Valid Down to VCC = 1V", meaning the active-high push-pull output will remain asserted (high) during brownout and transition cleanly to low only after VCC exceeds 2.50V and sustains for ≥140ms.
Is MAX6385XS25D3-T pin-compatible with older Maxim reset ICs like MAX809?
Yes, MAX6385XS25D3-T is explicitly listed as pin-compatible with MAX809/MAX810/MAX803 and other legacy supervisors in the Features section. However, note that MAX6385XS25D3-T uses a 4-pin SC70 package while MAX809 uses 3-pin SOT23 - physical pin count and layout differ, though functional pin mapping (VCC, RESET, GND, MR) aligns where applicable.
MAX6385XS25D3-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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS25D3-T FAQ
1.How can I place an order for MAX6385XS25D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS25D3-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 MAX6385XS25D3-T reliable?
The price and inventory of MAX6385XS25D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS25D3-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS25D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS25D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS25D3-T?
MAX6385XS25D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS25D3-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 MAX6385XS25D3-T?
For technical support, including MAX6385XS25D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS25D3-T requirements.
6.How does Aetrix verify that MAX6385XS25D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS25D3-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 MAX6385XS25D3-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS25D3-T?
All MAX6385XS25D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS25D3-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 MAX6385XS25D3-T part is unused and in its original packaging.
Return procedure for MAX6385XS25D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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