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Analog Devices Inc./Maxim Integrated MAX6385XS46D2-T
- Part No.:
- MAX6385XS46D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS46D2-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,003
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Product details
Overview
MAX6385XS46D2-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 4.63V reset threshold, 20ms minimum reset timeout, and manual reset input (MR). It monitors VCC from +1.8V to +5.0V while consuming only 3μA at +1.8V, and guarantees valid reset output down to VCC = 1V. It is used in portable battery-powered equipment for reliable power-on reset and brownout protection.
For engineers reviewing the MAX6385XS46D2-T datasheet, MAX6385XS46D2-T pinout, MAX6385XS46D2-T application, or MAX6385XS46D2-T equivalent, key selection criteria include reset threshold accuracy (±2.5% over −40°C to +125°C), MR debounce capability, SC70-4 package compatibility, and guaranteed operation down to VCC = 1V without external pullup.
Technical Context
The MAX6385XS46D2-T implements a precision voltage comparator with internal 4.63V reference and a monostable timer that enforces a minimum 20ms reset assertion after VCC rises above threshold or after MR release. Its MR input features an internal 63kΩ pullup resistor and accepts TTL/CMOS logic levels.
It uses BiCMOS process technology and supports operation across −40°C to +125°C. The device asserts RESET high when VCC falls below 4.63V or MR is pulled low, and holds RESET high for ≥20ms after recovery - ensuring μP initialization completes before code execution resumes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (nominal), ±2.5% tolerance over −40°C to +125°C - ensures accurate detection of 5V rail brownout |
| Reset Timeout | 20ms (minimum) - meets typical μP power-up stabilization requirements |
| Supply Current | 3μA at +1.8V - enables use in ultra-low-power battery applications |
| Output Type | Push-pull active-high - drives RESET line directly without external pullup resistor |
| Manual Reset Input | MR with 63kΩ internal pullup - supports momentary switch interface without external components |
| Operating Voltage | +1.0V to +5.5V - guarantees functional reset output even during deep brownout |
| Temperature Range | −40°C to +125°C - qualified for industrial and automotive environments |
Pinout & Package
MAX6385XS46D2-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm. This 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 - must be connected to system 5V or 4.5V–5.5V domain |
| 2 | RESET | Active-high push-pull output - drives μP RESET pin high during fault; no external pullup required |
| 3 | MR | Active-low manual reset input - pulling low forces reset; internal 63kΩ pullup to VCC enables NC default |
| 4 | GND | Ground reference - must be connected to system ground plane with low-impedance path |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 4.63V with ±2.5% accuracy over full temperature range - eliminates need for external resistor divider calibration |
| Guaranteed reset validity | RESET output remains logically valid down to VCC = 1V - prevents spurious release during deep brownout |
| Integrated MR pullup | 63kΩ internal resistor - enables direct connection of momentary switch between MR and GND without discrete components |
| Negative-going transient immunity | Rejects VCC glitches ≤100µs at 100mV overdrive - improves reliability in electrically noisy systems |
| Low quiescent current | 3μA at +1.8V - extends battery life in always-on monitoring applications |
Applications
| Portable Power Management | Industrial Controller Monitoring |
|---|---|
Use Scenario: Battery-powered handheld meter with 5V system rail and sleep-mode operation. IC Role / Device Role / Timing Role: Supervises VCC during wake-up from deep sleep and asserts active-high RESET to initialize MCU upon power restoration. Use Value: 3μA supply current minimizes standby drain; 4.63V threshold precisely detects 5V rail collapse before brownout affects ADC accuracy. | Use Scenario: PLC I/O module with dual 5V/3.3V supplies and field-replaceable firmware. IC Role / Device Role / Timing Role: Monitors main 5V rail and provides hardware reset signal to ARM Cortex-M4 core on undervoltage event. Use Value: 20ms timeout ensures complete flash memory initialization; MR input allows field technician to trigger controlled reboot via front-panel button. |
| Automotive Body Control Unit | Medical Diagnostic Handheld |
Use Scenario: BCM module powered from vehicle battery (9V–16V) with 5V LDO-derived rail. IC Role / Device Role / Timing Role: Detects 5V rail dropout during cold-crank transients and asserts RESET to prevent corrupted CAN message transmission. Use Value: −40°C to +125°C rating and AEC-Q100-compatible variant support ensure operation under hood conditions; 4.63V threshold avoids false triggers during nominal 5V ripple. | Use Scenario: Portable ultrasound probe with rechargeable Li-ion battery and low-noise analog front-end. IC Role / Device Role / Timing Role: Provides deterministic reset to FPGA configuration controller after battery insertion or charger disconnect. Use Value: Active-high push-pull output eliminates pullup resistor, reducing BOM count and board area; 20ms timeout aligns with FPGA configuration clock startup timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2-T | 4.63V threshold, 240ms timeout, no MR input, SOT23-3 package | Lacks manual reset functionality; longer timeout may delay system recovery | Select when MR is unnecessary and board space permits SOT23-3; verify 240ms timeout aligns with host processor requirements |
| TPS3808G33DBVR | 3.3V threshold (not 4.63V), 200ms timeout, MR input, SOT23-6 package | Incorrect threshold for 5V rail monitoring; requires external resistor network for 4.63V adaptation | Choose only if redesigning threshold via external feedback is acceptable; otherwise unsuitable for direct 5V supervision |
Compared with MAX809TRD2-T and TPS3808G33DBVR, the MAX6385XS46D2-T uniquely combines 4.63V precision threshold, 20ms fast timeout, MR input, and SC70-4 footprint - making it optimal for space-constrained 5V systems requiring rapid, user-initiated reset capability.
Availability
MAX6385XS46D2-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, industrial controllers, automotive body electronics, and medical handheld devices requiring stable component supply and long-term lifecycle support.
Supply support for MAX6385XS46D2-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 industrial, automotive, communications, and computing applications.
The MAX6381–MAX6390 family delivers low-power, high-accuracy μP supervisory circuits optimized for reliable reset generation in battery-sensitive and thermally demanding environments.
FAQ
What is the exact reset threshold voltage of MAX6385XS46D2-T and how stable is it over temperature?
The MAX6385XS46D2-T has a nominal reset threshold of 4.63V, with ±2.5% accuracy guaranteed over the full operating temperature range of −40°C to +125°C. This stability is achieved through factory laser trimming and BiCMOS process design, eliminating the need for external calibration. The MAX6385XS46D2-T maintains this accuracy without drift, supporting robust 5V rail supervision in automotive and industrial settings.
Does MAX6385XS46D2-T require an external pullup resistor on the RESET pin?
No, the MAX6385XS46D2-T features a push-pull active-high RESET output, so no external pullup resistor is needed. The output actively drives high during reset assertion and low when deasserted. This simplifies layout, reduces BOM count, and ensures clean signal edges - unlike open-drain alternatives that mandate external pullups. The MAX6385XS46D2-T's architecture guarantees correct logic state down to VCC = 1V.
What is the function and electrical behavior of the MR pin on MAX6385XS46D2-T?
The MR pin on MAX6385XS46D2-T is an active-low manual reset input with an internal 63kΩ pullup resistor to VCC. Driving MR low forces immediate RESET assertion, which remains active for the full 20ms timeout after MR is released. MR accepts TTL/CMOS logic levels and supports direct connection to a momentary switch (MR to GND). No external components are required, and the MAX6385XS46D2-T ensures glitch immunity via 100ns MR input filtering.
Can MAX6385XS46D2-T operate reliably during deep brownout conditions?
Yes, the MAX6385XS46D2-T guarantees valid RESET output down to VCC = 1V - meaning it continues asserting or deasserting RESET with correct logic levels even as supply voltage collapses. This behavior prevents spurious release during slow power-down sequences. Unlike many supervisors that fail below 1.8V, the MAX6385XS46D2-T maintains deterministic operation, making it suitable for critical applications where brownout resilience is mandatory.
What package type and dimensions does MAX6385XS46D2-T use, and is it RoHS-compliant?
The MAX6385XS46D2-T uses a 4-pin SC70 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm with a 0.65mm pin pitch. It is lead(Pb)-free and RoHS-compliant, indicated by the "+T" suffix. This compact, surface-mount package supports high-density routing and automated assembly, and its thermal resistance (θJA = 322.6°C/W on multilayer board) enables reliable operation in thermally constrained designs.
MAX6385XS46D2-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:
- 4.63V
- 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
MAX6385XS46D2-T FAQ
1.How can I place an order for MAX6385XS46D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS46D2-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 MAX6385XS46D2-T reliable?
The price and inventory of MAX6385XS46D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS46D2-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS46D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS46D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS46D2-T?
MAX6385XS46D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS46D2-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 MAX6385XS46D2-T?
For technical support, including MAX6385XS46D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS46D2-T requirements.
6.How does Aetrix verify that MAX6385XS46D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS46D2-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 MAX6385XS46D2-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS46D2-T?
All MAX6385XS46D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS46D2-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 MAX6385XS46D2-T part is unused and in its original packaging.
Return procedure for MAX6385XS46D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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