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Analog Devices Inc./Maxim Integrated MAX6385XS43D2-T
- Part No.:
- MAX6385XS43D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS43D2-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,097
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Product details
Overview
MAX6385XS43D2-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 4.30V reset threshold, 20ms minimum reset timeout, and manual reset input (MR), operating from 1.0V to 5.5V supply while consuming only 3μA at 1.8V - used in battery-powered controllers and portable instrumentation for reliable power-on reset and brownout protection.
For engineers reviewing the MAX6385XS43D2-T datasheet, MAX6385XS43D2-T pinout, MAX6385XS43D2-T application, or MAX6385XS43D2-T equivalent, key selection criteria include its active-high push-pull RESET output, ±2.5% threshold accuracy over –40°C to +125°C, MR debounce capability, guaranteed valid operation down to VCC = 1V, and 4-pin SC70 package compatibility with space-constrained embedded designs.
Technical Context
The MAX6385XS43D2-T integrates a precision voltage comparator monitoring VCC against a fixed 4.30V threshold, an internal timer enforcing a 20ms minimum reset assertion after VCC recovery, and a debounced manual reset input with 63kΩ internal pullup. It asserts RESET high when VCC drops below threshold or MR is pulled low, holding it high for the full timeout period.
This device belongs to the MAX6384–MAX6390 family of low-power supervisory circuits optimized for single-supply systems requiring deterministic reset behavior under fast transients, brownouts, and manual intervention - with no auxiliary voltage monitor or open-drain output functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.30V nominal, ±2.5% over –40°C to +125°C - ensures accurate detection of 4.3V supply rail collapse without false triggering. |
| Reset Timeout | 20ms minimum - guarantees μP remains held in reset long enough for stable power-up sequencing after VCC recovery. |
| Supply Current | 3μA at VCC = 1.8V - enables multi-year operation in coin-cell–powered IoT sensors and portable instruments. |
| RESET Output Type | Active-high push-pull - drives high-impedance loads directly without external pullup, compatible with most μP reset inputs. |
| MR Input | Debounced active-low with 63kΩ internal pullup - supports momentary switch interface without external RC filtering. |
| Operating Voltage | 1.0V to 5.5V - allows valid RESET state down to 1V VCC, supporting ultra-low-voltage brownout detection. |
| Temperature Range | –40°C to +125°C - qualified for industrial and automotive under-hood applications requiring extended thermal reliability. |
Pinout & Package
MAX6385XS43D2-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098), measuring 1.3mm × 1.6mm × 0.95mm, with exposed pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail - must be decoupled with 0.1μF capacitor near pin for transient immunity. |
| 2 | RESET | Active-high push-pull output - drives high during fault conditions; sinks/source current per spec up to 3.2mA/800μA. |
| 3 | GND | Ground reference for all internal circuitry and reset comparator - requires low-impedance connection to system ground plane. |
| 4 | MR | Active-low manual reset input - logic low forces reset; internal 63kΩ pullup allows direct switch-to-GND connection. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.30V threshold | Eliminates external resistor divider, reducing BOM count and layout area in fixed-rail systems like 4.3V LDO outputs. |
| 20ms guaranteed reset timeout | Ensures sufficient hold time for 8-bit and 32-bit microcontrollers to complete internal initialization before release. |
| MR input with internal pullup | Removes need for external pullup resistor, simplifying PCB routing and reducing component count in handheld devices. |
| ±2.5% threshold accuracy over temperature | Maintains consistent trip point across industrial environments, avoiding premature or delayed resets in thermal cycling. |
| Valid operation down to VCC = 1V | Enables robust reset assertion during deep brownout, preventing erratic μP execution even as supply collapses. |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Wearable ECG sensor powered by CR2032 coin cell, requiring fail-safe reset during battery voltage sag. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high RESET to ARM Cortex-M0+ MCU upon VCC drop below 4.30V. Use Value: 3μA quiescent current extends battery life beyond 3 years; 20ms timeout aligns with MCU boot ROM timing requirements. |
Use Scenario: Environmental data logger using Li-SOCl₂ primary cell, subject to cold-temperature voltage droop. IC Role / Device Role / Timing Role: Monitors main 4.3V regulated rail and provides manual reset via tactile switch for field firmware updates. Use Value: ±2.5% threshold stability over –40°C to +85°C prevents spurious resets during winter deployment. |
| Industrial PLC I/O Modules | Automotive Body Control Units |
Use Scenario: DIN-rail mounted I/O module with isolated 4.3V logic supply, exposed to 24V bus transients. IC Role / Device Role / Timing Role: Provides power-on reset and brownout detection for FPGA configuration controller. Use Value: Negative-going VCC transient immunity (per graph toc07) suppresses false resets from 100ns/100mV glitches on 24V-to-4.3V converter. |
Use Scenario: BCM sub-module monitoring 4.3V domain in 12V vehicle electrical system with load-dump events. IC Role / Device Role / Timing Role: Active-high RESET signal synchronized to CAN controller startup sequence. Use Value: AEC-Q100 qualified variant available; 4-pin SC70 footprint supports automated optical inspection in high-volume SMT lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS43D3-T | Same 4.30V threshold and active-high push-pull output, but 140ms reset timeout instead of 20ms. | Suitable for systems requiring longer reset hold time, e.g., complex SoCs with multi-stage bootloaders. | Select MAX6385XS43D3-T only if 140ms timeout matches system timing budget; otherwise MAX6385XS43D2-T is optimal for fast-boot MCUs. |
| MAX6326XR43D2-T | Pin-compatible 4-pin SC70 package, same 4.30V threshold and 20ms timeout, but active-low push-pull output. | Requires inverted reset logic on host MCU; not drop-in replaceable without firmware or schematic change. | Choose MAX6326XR43D2-T only when legacy design uses active-low reset; MAX6385XS43D2-T avoids level-shifting overhead. |
Compared with MAX6385XS43D3-T and MAX6326XR43D2-T, the MAX6385XS43D2-T uniquely balances minimal 20ms reset duration with active-high drive and integrated MR debouncing - making it optimal for cost-sensitive, space-constrained, and fast-booting embedded controllers where reset polarity and timing are tightly coupled to firmware execution flow.
Availability
MAX6385XS43D2-T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, industrial PLC I/O modules, and automotive body control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6385XS43D2-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, and computing applications, emphasizing low power, high reliability, and small form factor.
The MAX6384–MAX6390 family was developed specifically for ultra-low-power microprocessor supervision in space- and energy-constrained systems, delivering factory-trimmed thresholds and guaranteed timing without external components.
FAQ
What is the exact reset threshold voltage of the MAX6385XS43D2-T?
The MAX6385XS43D2-T has a factory-set nominal reset threshold of 4.30V, with 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 "43" corresponds to VTH(nom) = 4.30V, VTH(min) = 4.19V, and VTH(max) = 4.41V.
Does the MAX6385XS43D2-T support manual reset functionality?
Yes, the MAX6385XS43D2-T includes a debounced manual reset input (MR) on pin 4. Driving MR low forces an immediate active-high RESET assertion, which remains asserted for the full 20ms timeout after MR is released. An internal 63kΩ pullup resistor eliminates the need for an external pullup, enabling direct connection to a momentary switch.
What package type and dimensions does the MAX6385XS43D2-T use?
The MAX6385XS43D2-T is supplied in a 4-pin SC70 package (outline number 21-0098), measuring 1.3mm × 1.6mm × 0.95mm with gull-wing leads. The package code is X4+1, and it is RoHS-compliant (indicated by the "+" suffix). Land pattern number 90-0187 applies for PCB layout.
Is the MAX6385XS43D2-T suitable for automotive applications?
The base MAX6385XS43D2-T is rated for –40°C to +125°C operation and is AEC-Q100 qualified in /V-trim versions (e.g., MAX6385XS43D2/V+T). While the standard part meets industrial temperature requirements, automotive-grade qualification requires ordering the /V variant - confirmed in the Ordering Information section and Package Information table.
How does the MAX6385XS43D2-T behave when VCC drops below 1.0V?
The MAX6385XS43D2-T guarantees correct RESET output logic state only down to VCC = 1.0V. Below that, the internal circuitry cannot maintain defined behavior. For applications requiring valid reset signaling down to 0V, external pullup/pulldown resistors are recommended - though this scheme applies only to push-pull outputs like the MAX6385XS43D2-T's active-high RESET, not open-drain variants.
MAX6385XS43D2-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:
- 4.3V
- 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
MAX6385XS43D2-T FAQ
1.How can I place an order for MAX6385XS43D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS43D2-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 MAX6385XS43D2-T reliable?
The price and inventory of MAX6385XS43D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS43D2-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS43D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS43D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS43D2-T?
MAX6385XS43D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS43D2-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 MAX6385XS43D2-T?
For technical support, including MAX6385XS43D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS43D2-T requirements.
6.How does Aetrix verify that MAX6385XS43D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS43D2-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 MAX6385XS43D2-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS43D2-T?
All MAX6385XS43D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS43D2-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 MAX6385XS43D2-T part is unused and in its original packaging.
Return procedure for MAX6385XS43D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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