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Analog Devices Inc./Maxim Integrated MAX6385XS34D3-T
- Part No.:
- MAX6385XS34D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS34D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,428
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Product details
Overview
MAX6385XS34D3-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 3.40V reset threshold, 140ms minimum VCC reset timeout, and manual reset input. It monitors +1.8V to +5.0V supply rails in low-power embedded systems, consumes only 3μA at +1.8V, and guarantees valid reset output down to VCC = 1V. Used in portable battery-powered equipment requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6385XS34D3-T datasheet, MAX6385XS34D3-T pinout, MAX6385XS34D3-T application, or MAX6385XS34D3-T equivalent, this page delivers verified specifications, package mapping, functional alternatives, and design-critical timing behavior - all confirmed for the exact part number, including its 4-pin SC70 package, active-high push-pull output, and MR debounced manual reset capability.
Technical Context
The MAX6385XS34D3-T implements a precision voltage comparator with ±2.5% reset threshold accuracy over –40°C to +125°C and 60ppm/°C tempco, paired with a monolithic timer generating a guaranteed-minimum 140ms reset assertion after VCC recovery. Its internal 63kΩ MR pullup enables direct switch connection without external components.
It features negative-going VCC transient immunity up to 100mV overdrive (with pulse width <35µs), operates with valid logic states down to VCC = 1V, and supports reset assertion via either VCC drop below 3.40V or MR pin low assertion - both triggering the same 140ms timeout period before deassertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.40V (factory-set, ±2.5% over –40°C to +125°C) - ensures reliable detection of 3.3V rail brownout |
| VCC Reset Timeout | 140ms minimum - holds μP in reset long enough for stable clock and supply settling |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| MR Input Pullup | 63kΩ internal resistor - eliminates need for external pullup in manual reset switch interface |
| Operating Voltage Range | +1.0V to +5.5V - guarantees functional reset output even during deep brownout |
| Output Type | Active-high push-pull - drives high-impedance μP reset pin directly without external pullup |
| Reset Output Validity | Down to VCC = 1V - maintains correct logic state through full power collapse |
Pinout & Package
MAX6385XS34D3-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 1.25mm × 1.65mm × 0.95mm, suitable for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail - must be connected to system 3.3V or compatible rail |
| 2 | RESET | Active-high push-pull reset output - asserts high during fault; sinks current when low, sources when high |
| 3 | MR | Active-low manual reset input - driven low to force reset; internally pulled up to VCC via 63kΩ resistor |
| 4 | GND | Ground reference for all internal comparators and output stage - must connect to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 3.40V threshold | Eliminates external resistor divider; meets 3.3V system tolerance without calibration |
| 140ms guaranteed-minimum reset timeout | Ensures μP reset duration exceeds worst-case oscillator startup and PLL lock times |
| Debounced MR input with 63kΩ internal pullup | Supports direct SPST switch-to-ground connection; no external RC or logic required |
| Valid reset output down to VCC = 1V | Prevents metastability during deep undervoltage events where other supervisors fail |
| Negative-going VCC transient immunity | Rejects sub-35µs glitches up to 100mV below threshold - reduces false resets in noisy environments |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose monitor operating from single Li-ion cell (2.7V–4.2V). IC Role / Device Role / Timing Role: Monitors main 3.3V LDO output and asserts active-high RESET to ARM Cortex-M0+ during brownout or shutdown. Use Value: 3μA quiescent current extends battery life >2 years; 140ms timeout ensures ADC and BLE radio initialize fully before firmware execution. |
Use Scenario: DIN-rail mounted digital input module powered by 24VDC converted to 3.3V/5V rails. IC Role / Device Role / Timing Role: Supervises 3.3V logic rail and provides hardware reset to FPGA configuration controller on power-up and line disturbance. Use Value: ±2.5% threshold accuracy over –40°C to +85°C prevents spurious resets in uncontrolled cabinet environments; MR pin enables field-service hard reset. |
| Automotive Body Control Units | Smart Home Hub Power Management |
Use Scenario: 12V automotive subsystem with buck converter delivering 3.3V to microcontroller and CAN transceiver. IC Role / Device Role / Timing Role: Resets MCU on 3.3V rail dropout caused by load dump or cold-crank; MR tied to service diagnostic port. Use Value: AEC-Q100 qualified variant available; 3.40V threshold aligns with automotive 3.3V rail spec; 140ms timeout exceeds CAN transceiver initialization time. |
Use Scenario: Wi-Fi/BLE hub powered from USB-C PD (5V) with dual LDOs for 3.3V core and 1.8V memory rails. IC Role / Device Role / Timing Role: Primary supervisor for 3.3V rail; RESET signal synchronizes boot sequence across SoC, flash, and RF ICs. Use Value: Push-pull active-high output interfaces directly with SoC reset pin; low 3μA ICC minimizes standby drain from always-on power domain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS34D3+T | No /V automotive qualification; identical electrical specs and 4-pin SC70 package | Suitable for commercial-temperature (–40°C to +125°C) industrial and consumer use only | Select when AEC-Q100 compliance is not required and cost optimization is prioritized |
| TPS3808G33DBVR | 3.3V threshold (±0.5%), 200ms timeout, 1.4μA ICC at 3.3V, SOT-23-5 package | Higher accuracy but longer timeout and different pinout; requires PCB redesign | Choose for ultra-low-power applications needing tighter threshold tolerance, accepting layout change |
Compared with MAX6385XS34D3-T, the MAX6385XS34D3+T offers identical functionality without automotive qualification, while the TPS3808G33DBVR trades lower ICC and higher threshold accuracy for longer reset delay and incompatible 5-pin SOT-23 packaging - making it unsuitable for drop-in replacement but viable for new designs prioritizing nanoscale leakage.
Availability
MAX6385XS34D3-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart home hub power management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6385XS34D3-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 reliability and low-power operation in harsh environments.
The MAX6381–MAX6390 family delivers single/dual low-voltage microprocessor supervisory circuits optimized for battery-powered, automotive, and industrial systems demanding guaranteed reset behavior under brownout, transient, and cold-crank conditions.
FAQ
What is the exact reset threshold voltage of the MAX6385XS34D3-T?
The MAX6385XS34D3-T has a factory-set reset threshold of 3.40V, specified with ±2.5% accuracy over the full –40°C to +125°C operating temperature range. This value is confirmed in the Reset Thresholds table of the datasheet (suffix "34" corresponds to nominal 3.40V), and applies directly to the VCC monitoring function of the MAX6385XS34D3-T.
Does the MAX6385XS34D3-T support manual reset, and how is it implemented?
Yes, the MAX6385XS34D3-T includes a debounced manual reset input (MR) on Pin 3. It is active-low, features an internal 63kΩ pullup resistor to VCC, and asserts reset for a guaranteed minimum 140ms after MR is released. No external components are needed - simply connect a momentary switch between MR and GND to implement field-reset capability in the MAX6385XS34D3-T.
What package type and dimensions does the MAX6385XS34D3-T use?
The MAX6385XS34D3-T is supplied in a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 1.25mm × 1.65mm × 0.95mm. This RoHS-compliant, lead-free package is explicitly listed in the Ordering Information table for MAX6385XSxxDx variants and is distinct from the 3-pin or 6-pin variants used by other members of the MAX6381–MAX6390 family.
Can the MAX6385XS34D3-T operate reliably during deep brownout conditions?
Yes, the MAX6385XS34D3-T guarantees valid reset output logic states down to VCC = 1.0V, ensuring the active-high RESET pin remains correctly asserted or deasserted even as supply voltage collapses. This behavior is explicitly characterized in the Electrical Characteristics table and distinguishes the MAX6385XS34D3-T from supervisors that lose output control below 1.8V.
Is the MAX6385XS34D3-T pin-compatible with older Maxim reset ICs like the MAX809?
Yes, the MAX6385XS34D3-T is pin-compatible with the MAX809/MAX810 series in its 4-pin SC70 footprint, sharing identical VCC, GND, RESET, and MR pin assignments. The datasheet explicitly lists this compatibility in the Features section, confirming mechanical and functional interchangeability for upgrade paths - though designers must verify timing and threshold alignment for the specific MAX6385XS34D3-T implementation.
MAX6385XS34D3-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:
- 3.4V
- 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
MAX6385XS34D3-T FAQ
1.How can I place an order for MAX6385XS34D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS34D3-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 MAX6385XS34D3-T reliable?
The price and inventory of MAX6385XS34D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS34D3-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS34D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS34D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS34D3-T?
MAX6385XS34D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS34D3-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 MAX6385XS34D3-T?
For technical support, including MAX6385XS34D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS34D3-T requirements.
6.How does Aetrix verify that MAX6385XS34D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS34D3-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 MAX6385XS34D3-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS34D3-T?
All MAX6385XS34D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS34D3-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 MAX6385XS34D3-T part is unused and in its original packaging.
Return procedure for MAX6385XS34D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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