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Analog Devices Inc./Maxim Integrated MAX6385XS20D1-T
- Part No.:
- MAX6385XS20D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS20D1-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,167
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Product details
Overview
MAX6385XS20D1-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.0V reset threshold (±2.5% over -40°C to +125°C), 1ms minimum reset timeout, and manual reset input (MR) with internal 63kΩ pullup. It monitors VCC from +1.0V to +5.5V while consuming only 3μA at +1.8V and guarantees valid reset state down to VCC = 1V - used in battery-powered controllers and portable instrumentation for reliable power-up/brownout protection.
For engineers reviewing the MAX6385XS20D1-T datasheet, MAX6385XS20D1-T pinout, MAX6385XS20D1-T application, or MAX6385XS20D1-T equivalent, key selection criteria include its 4-pin SC70 package, active-high reset logic, 2.0V threshold accuracy, 1ms timeout, MR debounce capability, and compatibility with dual-voltage monitoring systems requiring stable reset assertion during supply transients.
Technical Context
The MAX6385XS20D1-T implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy across -40°C to +125°C and integrates a monostable timer for fixed 1ms 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 components.
This device operates as a single-supply VCC monitor only (no RESET IN pin), asserts reset when VCC falls below 2.0V, holds reset active for ≥1ms after VCC rises above threshold, and maintains guaranteed logic-level output down to VCC = 1V - distinguishing it from open-drain or dual-monitor variants in the MAX6381–MAX6390 family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.0V nominal, ±2.5% over -40°C to +125°C - ensures consistent brownout detection across automotive/industrial temperature ranges. |
| Reset Timeout | 1ms minimum - provides sufficient hold time for microcontroller initialization before release. |
| VCC Operating Range | +1.0V to +5.5V - supports operation down to near-dead-battery conditions and up to standard logic rails. |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors and portable instruments. |
| Reset Output Type | Active-high push-pull - eliminates need for external pullup resistor and drives high-impedance μP reset inputs directly. |
| Manual Reset Input | MR with 63kΩ internal pullup - allows momentary switch connection without discrete components; 1µs glitch rejection prevents false triggers. |
| Reset Output Validity | Guaranteed down to VCC = 1V - ensures deterministic reset state during deep brownout or fast power-down sequences. |
Pinout & Package
MAX6385XS20D1-T uses a 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm, with exposed pad for thermal enhancement. Pin 1 is RESET (active-high push-pull), Pin 2 is VCC, Pin 3 is GND, and Pin 4 is MR (active-low manual reset).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push-pull output; drives high during reset assertion; sinks 80µA at VCC ≥ 1.0V with VOL ≤ 0.3V. |
| 2 | VCC | Main supply input; monitored for reset threshold violation; absolute max rating -0.3V to +6.0V. |
| 3 | GND | Analog/digital ground reference; must be connected to system ground plane for accurate threshold sensing. |
| 4 | MR | Active-low manual reset input; internally pulled up to VCC via 63kΩ; requires <0.3×VCC to assert reset. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.0V threshold | Eliminates external resistor divider; reduces BOM count and layout area in space-constrained portable designs. |
| 1ms reset timeout | Matches typical μP boot ROM execution time; avoids premature release that could cause firmware corruption. |
| 3μA supply current at 1.8V | Extends battery life in always-on monitoring applications such as medical wearables and remote sensors. |
| MR input with integrated pullup | Enables direct switch-to-ground interface; removes need for external pullup resistor and associated PCB trace. |
| Valid reset output down to VCC = 1V | Ensures deterministic behavior during rapid power collapse - critical for data logging integrity in backup power systems. |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
|
Use Scenario: Continuous ECG/SpO₂ monitoring powered by CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Supervises VCC during battery discharge curve; asserts reset if voltage drops below 2.0V to prevent corrupted sensor readings or flash writes. Use Value: 3μA quiescent current extends operational life beyond 2 years; 1ms timeout ensures full ADC initialization before firmware execution. |
Use Scenario: Environmental sensor node recording temperature/humidity every 10 seconds, sleeping between samples. IC Role / Device Role / Timing Role: Monitors main Li-ion supply rail; forces controlled reboot on brownout to preserve last-valid measurement in nonvolatile memory. Use Value: Active-high push-pull output interfaces directly with MSP430 reset pin; MR input allows field technician-initiated calibration reset. |
| Industrial Controller HMI Panels | Automotive Body Control Modules |
|
Use Scenario: Touchscreen-based PLC interface operating from 3.3V rail with transient-prone 12V-to-3.3V DC/DC converter. IC Role / Device Role / Timing Role: Detects negative-going VCC glitches >100mV amplitude; suppresses false resets using built-in transient immunity. Use Value: ±2.5% threshold accuracy over -40°C to +125°C ensures reliable operation in unheated enclosures; 4-pin SC70 footprint minimizes PCB real estate. |
Use Scenario: Low-power door module monitoring 5V supply derived from vehicle battery, subject to load-dump and cold-crank events. IC Role / Device Role / Timing Role: Provides fail-safe reset during cold-crank (VCC dip to 1.8V); guarantees reset validity even as supply recovers to 1.0V. Use Value: Valid output down to VCC = 1V prevents metastability in MCU reset input; RoHS-compliant SC70 package meets automotive sourcing requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6382XR20D1-T | Same 2.0V threshold, 1ms timeout, and active-high push-pull output, but in 3-pin SC70 package (no MR pin). | Lacks manual reset functionality; suitable only where external reset initiation is unnecessary. | Select when board space is extremely constrained and MR is not required - saves one PCB pad and routing trace. |
| TLV803EB20DBZR | 2.0V threshold, 140ms timeout, open-drain active-low output, 0.5μA supply current at 1.8V. | Requires external pullup resistor; longer timeout may delay system recovery; lower current benefits ultra-low-power use cases. | Choose for sub-1μA systems where reset timing flexibility is acceptable and active-low logic is already standardized in the design. |
Compared with MAX6385XS20D1-T, MAX6382XR20D1-T reduces package size but removes MR capability, while TLV803EB20DBZR cuts supply current by 40% yet increases timeout 140× and requires external biasing - making MAX6385XS20D1-T optimal for MR-enabled, timing-critical, space-limited applications.
Availability
MAX6385XS20D1-T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, industrial HMI panels, and automotive body control modules requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6385XS20D1-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 power, sensing, and interface applications, with emphasis on low-power, high-reliability solutions for industrial and automotive markets.
The MAX6381–MAX6390 family was engineered specifically for microprocessor supervision in space- and power-constrained systems, delivering factory-trimmed thresholds, ultra-low quiescent current, and robust transient immunity in miniature SC70 and μDFN packages.
FAQ
What is the reset threshold voltage and tolerance for MAX6385XS20D1-T?
The MAX6385XS20D1-T has a factory-set nominal reset threshold of 2.0V with ±2.5% accuracy over the full operating temperature range of -40°C to +125°C. This specification is guaranteed by design and ensures reliable brownout detection across automotive and industrial environments without requiring external calibration or trimming components.
Does MAX6385XS20D1-T support manual reset functionality?
Yes, MAX6385XS20D1-T includes an active-low manual reset input (MR) with an internal 63kΩ pullup resistor to VCC. Driving MR below 0.3×VCC asserts reset, and the device holds reset active for the full 1ms timeout period after MR is released - enabling field service, test mode entry, or user-triggered reinitialization without external circuitry.
What package type and dimensions does MAX6385XS20D1-T use?
MAX6385XS20D1-T is packaged in a 4-pin SC70 (SOT-323) outline (21-0098), measuring 2.0mm × 2.1mm × 0.95mm with a 0.65mm pitch. The package is RoHS-compliant (+ suffix), features an exposed thermal pad, and is compatible with standard reflow soldering profiles including peak temperatures up to +260°C.
Can MAX6385XS20D1-T operate reliably at very low supply voltages?
Yes, MAX6385XS20D1-T guarantees correct reset output logic state down to VCC = 1.0V, and its supply current remains stable at just 3μA at +1.8V. This enables dependable operation during deep brownout conditions and extends usable battery life in energy-harvesting and coin-cell–powered applications where supply voltage may sag significantly before shutdown.
Is MAX6385XS20D1-T pin-compatible with other devices in the MAX6381–MAX6390 family?
MAX6385XS20D1-T shares the same 4-pin SC70 pinout as MAX6384 and MAX6386 variants but differs from 3-pin SC70 (e.g., MAX6382) and 6-pin μDFN versions. It is not pin-compatible with open-drain or dual-monitor variants like MAX6387 due to differing pin functions - always verify pin mapping against the specific ordering code's datasheet diagram before PCB layout.
MAX6385XS20D1-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:
- 2V
- 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
MAX6385XS20D1-T FAQ
1.How can I place an order for MAX6385XS20D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS20D1-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 MAX6385XS20D1-T reliable?
The price and inventory of MAX6385XS20D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS20D1-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS20D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS20D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS20D1-T?
MAX6385XS20D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS20D1-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 MAX6385XS20D1-T?
For technical support, including MAX6385XS20D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS20D1-T requirements.
6.How does Aetrix verify that MAX6385XS20D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS20D1-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 MAX6385XS20D1-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS20D1-T?
All MAX6385XS20D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS20D1-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 MAX6385XS20D1-T part is unused and in its original packaging.
Return procedure for MAX6385XS20D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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