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Analog Devices Inc./Maxim Integrated MAX6385XS45D2-T
- Part No.:
- MAX6385XS45D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS45D2-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,277
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Product details
Overview
MAX6385XS45D2-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 4.50V reset threshold, 20ms minimum reset timeout, and manual reset input. It monitors VCC from +1.8V to +5.5V, consumes only 3μA at +1.8V, and guarantees valid reset output down to VCC = 1V. It is used in portable battery-powered equipment requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6385XS45D2-T datasheet, MAX6385XS45D2-T pinout, MAX6385XS45D2-T application, or MAX6385XS45D2-T equivalent, key selection criteria include reset threshold accuracy (±2.5% over −40°C to +125°C), MR input pullup resistance (63kΩ), guaranteed operation down to VCC = 1V, and compatibility with dual-voltage systems requiring auxiliary monitoring support.
Technical Context
The MAX6385XS45D2-T implements a precision bandgap-based voltage comparator for VCC monitoring with ±2.5% threshold accuracy across temperature. Its internal timer generates a fixed 20ms minimum reset timeout after VCC rises above 4.50V or after release of the active-low manual reset (MR) input.
It features an internal 63kΩ pullup on MR, supports TTL/CMOS-compatible logic drive, and asserts RESET high during fault conditions - including power-up, brownout, and manual trigger - maintaining that state for the full timeout period before deassertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.50V nominal (±2.5% over −40°C to +125°C); ensures reliable detection of 4.5V supply rail collapse |
| Reset Timeout | 20ms minimum; provides sufficient hold time for μP initialization after power recovery |
| Supply Current | 3μA at +1.8V; enables ultra-low-power operation in battery-critical applications |
| Operating Voltage | +1.0V to +5.5V; guarantees functional reset output even during deep brownout (down to 1V) |
| MR Pullup Resistance | 63kΩ; allows direct connection of momentary switch to GND without external components |
| Reset Output Type | Active-high push-pull; drives high during fault, eliminates need for external pullup resistor |
| Temperature Range | −40°C to +125°C; qualified for industrial and extended-temperature embedded systems |
Pinout & Package
MAX6385XS45D2-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. The compact footprint supports high-density PCB layouts in space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail; powers device and feeds reset comparator |
| 2 | RESET | Active-high push-pull output; drives high during reset assertion, sinks current when deasserted |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC via 63kΩ resistor; initiates reset when pulled low |
| 4 | GND | Ground reference for all internal circuitry and reset comparator; must be low-impedance return path |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 4.50V with ±2.5% tolerance over full temperature range - eliminates external resistor network calibration |
| Guaranteed operation down to VCC = 1V | Ensures deterministic reset behavior during severe brownout, preventing undefined μP states |
| Debounced manual reset input | Internal MR filtering removes contact bounce; no external RC required for pushbutton interface |
| Negative-going VCC transient immunity | Rejects sub-10µs glitches below reset threshold - improves robustness in noisy power environments |
| Low quiescent current | 3μA at +1.8V enables >10-year battery life in always-on monitoring applications |
Applications
| Portable Power Management | Dual-Voltage System Monitoring |
|---|---|
Use Scenario: Battery-powered handheld instrument with 3.3V core and 5V I/O rails, requiring coordinated reset sequencing during cold start. IC Role / Device Role / Timing Role: Supervises 5V rail (VCC) and triggers active-high RESET to hold μC in reset until both rails stabilize. Use Value: Prevents spurious code execution during asymmetric rail ramp-up; 20ms timeout aligns with typical LDO settling time. | Use Scenario: Industrial controller with separate 1.8V core and 3.3V peripheral supplies, needing independent fault detection. IC Role / Device Role / Timing Role: Monitors primary 3.3V rail while enabling optional secondary monitoring via external divider on unused pins (not applicable to MAX6385). Use Value: Provides single-chip reset assurance for main rail; pin-compatible upgrade path to MAX6387/88/89 if auxiliary monitoring later required. |
| Embedded Microcontroller Reset | Low-Power Sensor Node |
Use Scenario: Automotive-grade telematics module using ARM Cortex-M4, requiring AEC-Q100-aligned reset supervision. IC Role / Device Role / Timing Role: Active-high push-pull RESET output directly interfaces with μC's nRST pin, eliminating level-shifter or pullup. Use Value: Reduces BOM count and layout area; 4.50V threshold matches 5V system margin requirements. | Use Scenario: Wireless environmental sensor node powered by coin cell, operating intermittently to conserve energy. IC Role / Device Role / Timing Role: Maintains valid reset state during deep sleep (VCC ≥ 1V), then asserts RESET high upon wake-up voltage breach. Use Value: 3μA supply current extends battery life; 20ms timeout ensures clean boot before radio initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR45D2+T | Same 4.50V threshold and 20ms timeout, but active-low open-drain output; requires external pullup | Suitable where system-level reset polarity is inverted or shared bus architecture demands open-drain | Select when interfacing with legacy μCs requiring active-low reset or multi-drop reset buses |
| TPS3808G33DBVR | 3.3V threshold (not 4.5V); 20ms timeout; 1.8–6V operation; 2.5μA ICC at 3.3V | Designed for 3.3V-centric systems; lacks MR input in base variant (TPS3808G33 has no MR) | Choose only if redesigning for lower-voltage rail; not drop-in due to threshold mismatch and missing MR |
Compared with MAX6385XS45D2-T, MAX6326XR45D2+T offers identical timing and threshold but different output polarity and drive type, while TPS3808G33DBVR targets 3.3V systems and omits manual reset - making MAX6385XS45D2-T uniquely suited for 4.5V-supervised, MR-enabled, space-constrained 5V applications.
Availability
MAX6385XS45D2-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, critical μP and μC power monitoring, and intelligent instruments requiring stable component supply and long-term industrial availability.
Supply support for MAX6385XS45D2-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 computing applications.
The MAX6381–MAX6390 family delivers ultra-low-power, factory-trimmed reset supervision for microprocessor systems - optimized for reliability in battery-operated, high-temperature, and noise-prone environments.
FAQ
What is the exact reset threshold voltage of the MAX6385XS45D2-T?
The MAX6385XS45D2-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, where suffix "45" corresponds to VTH(nom) = 4.50V, VTH(min) = 4.39V, and VTH(max) = 4.61V. The MAX6385XS45D2-T uses this precise threshold to supervise 5V supply rails in industrial and portable systems.
Does the MAX6385XS45D2-T support manual reset functionality?
Yes, the MAX6385XS45D2-T includes a debounced active-low manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. Driving MR low forces an immediate reset assertion, which remains active for the full 20ms timeout period after MR is released. This feature is explicitly documented in the General Description and Pin Description sections, confirming MR functionality for MAX6384/MAX6385/MAX6386/MAX6390 variants. The MAX6385XS45D2-T leverages this for field-service or test-mode resets without external components.
What package type and dimensions does the MAX6385XS45D2-T use?
The MAX6385XS45D2-T is packaged in a 4-pin SC70 (SOT-323) outline, designated as package code X4+1, with outline number 21-0098 and land pattern 90-0187. Its physical dimensions are 1.3mm × 1.6mm × 0.95mm. This RoHS-compliant, lead-free package is verified in the Package Information section and ordering table, where "XS" denotes the 4-pin SC70 variant. The MAX6385XS45D2-T's compact size supports high-density layouts in portable and wearable electronics.
Is the MAX6385XS45D2-T compatible with AEC-Q100 automotive qualification?
No, the MAX6385XS45D2-T is not AEC-Q100 qualified. While the MAX6381–MAX6390 family includes /V automotive variants (e.g., MAX6385XS45D2/V+T), the standard MAX6385XS45D2-T carries the "+T" RoHS suffix only and is rated for −40°C to +125°C industrial operation. The datasheet explicitly states AEC-Q100 qualification applies only to parts with "/V" in the ordering code. Therefore, the MAX6385XS45D2-T is intended for industrial and commercial applications, not automotive safety-critical systems.
What is the minimum supply voltage at which the MAX6385XS45D2-T guarantees correct reset output behavior?
The MAX6385XS45D2-T guarantees valid reset output state down to VCC = 1.0V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. This means the active-high RESET output remains logically correct (high during reset, low otherwise) even when the supply voltage drops to 1V - critical for detecting deep brownout conditions before complete power loss. This specification is confirmed across all operating temperatures and distinguishes the MAX6385XS45D2-T from many competitors that fail below 1.5V. The MAX6385XS45D2-T maintains deterministic behavior throughout this extended range.
MAX6385XS45D2-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:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS45D2-T FAQ
1.How can I place an order for MAX6385XS45D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS45D2-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 MAX6385XS45D2-T reliable?
The price and inventory of MAX6385XS45D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS45D2-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS45D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS45D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS45D2-T?
MAX6385XS45D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS45D2-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 MAX6385XS45D2-T?
For technical support, including MAX6385XS45D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS45D2-T requirements.
6.How does Aetrix verify that MAX6385XS45D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS45D2-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 MAX6385XS45D2-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS45D2-T?
All MAX6385XS45D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS45D2-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 MAX6385XS45D2-T part is unused and in its original packaging.
Return procedure for MAX6385XS45D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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