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Analog Devices Inc./Maxim Integrated MAX6385XS45D1-T
- Part No.:
- MAX6385XS45D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS45D1-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,978
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Product details
Overview
MAX6385XS45D1-T from Maxim Integrated is a precision microprocessor supervisory circuit with active-high push-pull reset output, factory-set 4.50V reset threshold (±2.5% over -40°C to +125°C), 1ms minimum reset timeout, and manual reset input (MR) featuring internal 63kΩ pullup. It monitors single supply voltage in low-power embedded systems where reliable power-on reset and brownout protection are critical-e.g., industrial controllers operating from 3.3V or 5V rails.
For engineers reviewing the MAX6385XS45D1-T datasheet, MAX6385XS45D1-T pinout, MAX6385XS45D1-T application, or MAX6385XS45D1-T equivalent, key selection considerations include its 4-pin SC70 package, guaranteed reset validity down to VCC = 1V, ±2.5% threshold accuracy across automotive temperature range, and compatibility with manual reset switch interfaces without external pullup.
Technical Context
The MAX6385XS45D1-T implements a precision bandgap-based voltage comparator for VCC monitoring, paired with a digital timeout counter that asserts RESET high for ≥1ms after VCC rises above 4.50V. Its MR input features debounced logic-level detection with 1µs minimum pulse width and 100ns glitch rejection.
This device operates as a standalone reset supervisor-not requiring external components for basic functionality-and guarantees correct RESET logic state even at VCC = 1V, enabling robust behavior during deep brownout conditions. It draws only 3µA at 1.8V and 6µA at 3.6V, supporting battery-powered applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.50V nominal, ±2.5% over -40°C to +125°C - ensures accurate trip point across full automotive temperature range |
| Reset Timeout | 1ms minimum - provides sufficient hold time for μP initialization on power-up |
| Supply Current | 3µA at 1.8V, 6µA at 3.6V - enables multi-year operation in coin-cell–powered devices |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion down to near-dead-battery conditions |
| MR Input Pullup | 63kΩ internal - eliminates need for external resistor when using momentary switch to GND |
| Reset Output Type | Active-high push-pull - drives high actively; no external pullup required |
| Package | 4-pin SC70 (X4+1 outline) - compact 1.3mm × 1.6mm footprint for space-constrained PCBs |
Pinout & Package
MAX6385XS45D1-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 | Primary supply input and monitored voltage rail; powers internal circuitry and serves as reset threshold reference |
| 2 | RESET | Active-high push-pull output; driven high during reset assertion, low otherwise; sinks/source capability per spec sheet |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC via 63kΩ; initiates reset when pulled to GND |
| 4 | GND | Ground reference for all internal comparators, timers, and I/O; must be low-impedance connection |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 4.50V with ±2.5% tolerance over -40°C to +125°C - eliminates need for external calibration or trimming resistors |
| Guaranteed reset validity down to VCC = 1V | Ensures deterministic logic state on RESET pin even during severe brownout, preventing spurious μP release |
| Debounced manual reset input | 1µs minimum MR pulse width and 100ns glitch rejection - tolerates mechanical switch bounce and EMI without external RC |
| Low quiescent current | 3µA at 1.8V - extends battery life in portable instrumentation and remote sensors |
| Negative-going VCC transient immunity | Withstands short-duration supply glitches (e.g., <100ns at 100mV overdrive) without false reset assertion |
Applications
| Industrial PLC Controller | Medical Diagnostic Handheld |
|---|---|
Use Scenario: Power-up sequencing and brownout recovery in DIN-rail mounted programmable logic controllers with dual 24V/5V supplies. IC Role / Device Role / Timing Role: Monitors 5V logic rail; asserts active-high RESET to ARM Cortex-M7 core for 1ms minimum after VCC stabilizes. Use Value: Prevents firmware corruption during unstable mains input by ensuring μP remains held until regulated 5V rail exceeds 4.50V and sustains for ≥1ms. |
Use Scenario: Battery-backed portable ultrasound probe requiring fail-safe boot integrity after cold start or low-battery wake-up. IC Role / Device Role / Timing Role: Supervises 3.3V system rail; RESET output directly drives μP reset pin; MR enables clinician-initiated soft reset via front-panel button. Use Value: 6µA supply current at 3.6V extends single-charge runtime; ±2.5% threshold stability ensures consistent reset timing across operating temperature range (-20°C to +55°C). |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: Reset supervision for CAN-enabled BCM microcontroller exposed to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Monitors 5V domain; active-high push-pull RESET interface avoids reliance on external pullup under high-temperature conditions. Use Value: Valid reset assertion down to VCC = 1V prevents premature release during cranking (battery dip to ~6V → regulator dropout); AEC-Q100 qualified variant available. |
Use Scenario: Tamper-resistant electricity meter with isolated MCU and real-time clock, powered from AC-derived 3.3V rail. IC Role / Device Role / Timing Role: Provides power-on reset and brownout detection for metering SoC; MR pin connected to secure tamper-detection circuit. Use Value: Internal 63kΩ MR pullup simplifies BOM; 1ms timeout aligns with SoC's minimum reset hold requirement; SC70 footprint saves space on meter's narrow PCB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR45D1+T | Same 4.50V threshold and 1ms timeout, but active-low open-drain output; requires external pullup resistor | Suitable for legacy designs using active-low reset architecture or wired-OR reset buses | Select if existing PCB uses open-drain reset net; avoid if redesigning for lowest component count |
| TPS3808G15DBVR | 1.5V threshold (not 4.5V); 20ms default timeout; higher 8µA ICC at 3.6V; SOT-23-5 package | Designed for ultra-low-voltage systems (e.g., 1.8V core rails); lacks MR input in base variant | Only consider for new designs targeting sub-2V supplies; not drop-in compatible due to different threshold and pinout |
Compared with MAX6385XS45D1-T, MAX6326XR45D1+T offers identical supervision parameters but demands external biasing for reset signaling, while TPS3808G15DBVR targets lower-voltage domains and lacks manual reset-making MAX6385XS45D1-T optimal for 4.5V rail monitoring with integrated MR and minimal footprint.
Availability
MAX6385XS45D1-T is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, automotive body electronics, and smart energy meters requiring stable component supply, long-term lifecycle support, and AEC-Q100–capable alternatives.
Supply support for MAX6385XS45D1-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 demanding industrial, automotive, and computing applications, with emphasis on reliability, low power, and small form factor.
The MAX6381–MAX6390 family delivers single/dual-supply reset supervision with factory-trimmed thresholds, multiple timeout options, and MR/RESET IN flexibility-targeting space- and power-constrained embedded systems needing deterministic power-on behavior.
FAQ
What is the exact reset threshold voltage of MAX6385XS45D1-T?
The MAX6385XS45D1-T has a factory-set nominal reset threshold of 4.50V, with guaranteed tolerance of ±2.5% over the full operating temperature range (-40°C to +125°C). This value is confirmed in the Reset Thresholds table of the datasheet (suffix "45" corresponds to 4.50V nominal), and applies specifically to the MAX6385XS45D1-T variant-not inferred from family data.
Does MAX6385XS45D1-T support manual reset functionality?
Yes, MAX6385XS45D1-T includes a dedicated MR (manual reset) input pin with internal 63kΩ pullup to VCC. Driving MR low forces an active-high reset assertion for the full 1ms timeout period after release. This feature is explicitly documented for MAX6385 in the Selector Guide and Pin Description sections.
What package type and dimensions does MAX6385XS45D1-T use?
MAX6385XS45D1-T is packaged in a 4-pin SC70 (X4+1 outline), measuring 1.3mm × 1.6mm × 0.95mm. The land pattern number is 90-0187, and thermal resistance θJA is 322.6°C/W on a multilayer board-details confirmed in the Package Information section of the official datasheet.
Is MAX6385XS45D1-T suitable for automotive applications?
While the base MAX6385XS45D1-T is not automotive-qualified, the /V variant (e.g., MAX6385XS45D1/V+T) is AEC-Q100 qualified for automotive use. The datasheet explicitly states "AEC-Q100 Qualified, Refer to Ordering Information for the Specific /V Trim Version," confirming qualification applies to this exact part number family with /V suffix.
What is the minimum reset timeout period for MAX6385XS45D1-T?
The MAX6385XS45D1-T has a minimum reset timeout period of 1ms, corresponding to the "D1" suffix in its part number. This is verified in the Reset Timeout Delay table, where D1 is defined as "1ms (min)" for MAX6381–MAX6389 devices-including MAX6385.
MAX6385XS45D1-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:
- 4.5V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS45D1-T FAQ
1.How can I place an order for MAX6385XS45D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS45D1-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 MAX6385XS45D1-T reliable?
The price and inventory of MAX6385XS45D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS45D1-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS45D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS45D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS45D1-T?
MAX6385XS45D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS45D1-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 MAX6385XS45D1-T?
For technical support, including MAX6385XS45D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS45D1-T requirements.
6.How does Aetrix verify that MAX6385XS45D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS45D1-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 MAX6385XS45D1-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS45D1-T?
All MAX6385XS45D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS45D1-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 MAX6385XS45D1-T part is unused and in its original packaging.
Return procedure for MAX6385XS45D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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