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Analog Devices Inc./Maxim Integrated MAX6385XS34D2-T
- Part No.:
- MAX6385XS34D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS34D2-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,595
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Product details
Overview
MAX6385XS34D2-T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit with factory-set 3.40V reset threshold, 20ms 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, guarantees valid reset output down to VCC = 1V, and operates across –40°C to +125°C for industrial and automotive applications.
For engineers reviewing the MAX6385XS34D2-T datasheet, MAX6385XS34D2-T pinout, MAX6385XS34D2-T application, or MAX6385XS34D2-T equivalent, this page delivers verified electrical parameters, SC70-4 package layout, reset timing behavior under voltage transients, and direct alternatives for power-rail monitoring in battery-powered controllers and critical μP systems.
Technical Context
The MAX6385XS34D2-T implements a precision bandgap-based reset comparator with ±2.5% threshold accuracy over temperature and 60ppm/°C tempco. Its internal timer enforces a guaranteed minimum 20ms reset assertion after VCC recovers above 3.40V.
It features a debounced active-low manual reset input (MR) with 63kΩ internal pullup, enabling external reset initiation without external components. The push-pull active-high RESET output drives high during fault conditions and deasserts cleanly after timeout, eliminating need for external pullup resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.40V nominal, ±2.5% over –40°C to +125°C - ensures reliable brownout detection across full industrial temperature range |
| VCC Reset Timeout | 20ms minimum - holds μP in reset long enough for stable power-up of core logic and peripherals |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors and portable instruments |
| Operating Voltage Range | +1.0V to +5.5V - supports valid reset assertion even during deep brownout down to 1V rail collapse |
| Reset Output Type | Push-pull active-high - eliminates external pullup, reduces BOM count, and ensures fast, rail-to-rail logic transitions |
| Manual Reset Input | Active-low MR with 63kΩ internal pullup - allows momentary switch connection directly to GND; no external resistor required |
| Transient Immunity | Negative-going VCC glitch rejection up to 100ns - prevents spurious resets from digital switching noise on shared power rails |
Pinout & Package
MAX6385XS34D2-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, optimized for space-constrained PCB layouts in portable and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input; powers internal circuitry and serves as monitored voltage rail for primary reset detection |
| 2 | RESET | Push-pull active-high reset output; drives high during fault and remains high for full 20ms timeout after recovery |
| 3 | MR | Active-low manual reset input; asserts reset when pulled ≤0.3×VCC; internally pulled up to VCC via 63kΩ resistor |
| 4 | GND | Analog and digital ground reference; must be connected to system ground plane for accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 3.40V reset threshold | Eliminates external resistor divider; achieves ±2.5% accuracy across –40°C to +125°C without calibration |
| 20ms guaranteed minimum reset timeout | Ensures μP initialization completes before release - meets JEDEC JESD8-12E power-up timing requirements |
| MR input with integrated 63kΩ pullup | Reduces component count by one resistor; supports direct connection of SPST switch to GND |
| Valid reset output down to VCC = 1V | Prevents undefined logic states during deep brownout - critical for fail-safe shutdown in automotive ECUs |
| 3μA supply current at +1.8V | Enables >10-year battery life in always-on sensor nodes powered by CR2032 cells |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors 3.3V I/O supply and 5V MCU core rail in programmable logic controller with dual-voltage architecture. IC Role / Device Role / Timing Role: Primary supervisor for main processor; asserts active-high RESET to halt execution during undervoltage events on either rail. Use Value: Prevents corrupted firmware writes during brownout by enforcing 20ms minimum reset hold time after VCC recovery. | Use Scenario: Embedded in door module ECU to supervise 5V LIN transceiver supply and 3.3V microcontroller domain. IC Role / Device Role / Timing Role: Active-high reset generator triggered by VCC drop below 3.40V; MR pin tied to service diagnostic button. Use Value: Guarantees clean restart after ignition cycling; ±2.5% threshold accuracy ensures consistent trip point across under-hood temperature extremes. |
| Portable Medical Monitor | Battery-Powered Data Logger |
Use Scenario: Powers clinical-grade pulse oximeter with single-cell Li-ion (2.7V–4.2V) and regulated 3.0V analog front-end. IC Role / Device Role / Timing Role: Supervises 3.0V analog supply; RESET output held high until stable, preventing ADC misreads during startup. Use Value: 3μA quiescent current extends battery runtime; 20ms timeout aligns with op-amp settling time in signal chain. | Use Scenario: Logs environmental data in remote field sensor node powered by AA alkaline batteries (0.9V–1.6V/cell). IC Role / Device Role / Timing Role: Monitors 3.3V LDO output; MR pin used for field technician-initiated firmware update reset. Use Value: Valid reset assertion down to VCC = 1V ensures deterministic behavior during end-of-life battery sag. |
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 | Same 3.40V threshold and MR input, but 140ms VCC reset timeout instead of 20ms | Suitable where longer reset hold time is needed for complex boot sequences or slow-ramping supplies | Select when system requires extended reset assertion beyond 20ms - not drop-in compatible due to timing mismatch |
| TPS3123E18DBVR | 3.08V threshold, 200ms timeout, SOT-23-5 package, no MR input | Lacks manual reset capability; designed for simpler single-rail supervision without user-triggered reset | Choose only if MR functionality is unnecessary and 3.08V threshold matches target supply tolerance |
Compared with MAX6385XS34D2-T, MAX6385XS34D3-T provides longer reset hold time for demanding boot flows, while TPS3123E18DBVR offers lower cost and smaller footprint but omits MR - requiring redesign if manual reset is essential.
Availability
MAX6385XS34D2-T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, portable medical monitors, and battery-powered data loggers requiring stable component supply, AEC-Q100-aligned reliability, and long-term production continuity.
Supply support for MAX6385XS34D2-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 markets, emphasizing low power, high reliability, and robust performance.
The MAX6381–MAX6390 family delivers ultra-low-power microprocessor supervisory circuits optimized for battery-operated equipment and harsh-environment systems requiring guaranteed reset behavior across wide voltage and temperature ranges.
FAQ
What is the exact reset threshold voltage of the MAX6385XS34D2-T?
The MAX6385XS34D2-T has a factory-set nominal reset threshold of 3.40V, with guaranteed tolerance of ±2.5% over the full operating temperature range of –40°C to +125°C. This value is laser-trimmed during production and does not require external calibration. The MAX6385XS34D2-T maintains this accuracy without drift, making it suitable for applications where supply margin is tight and consistency across temperature is critical.
Does the MAX6385XS34D2-T support manual reset functionality?
Yes, the MAX6385XS34D2-T includes an active-low manual reset input (MR) with a built-in 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 enables field-service reset, test-mode entry, or operator-initiated reboot without adding external components - a key differentiator from basic reset monitors like the TPS3123E18DBVR.
What package type and dimensions does the MAX6385XS34D2-T use?
The MAX6385XS34D2-T is supplied in a lead-free, RoHS-compliant 4-pin SC70 package (outline number 21-0098), measuring 2.0mm × 2.1mm × 0.95mm. Its compact footprint and thermal resistance (θJA = 322.6°C/W on multilayer board) make it ideal for dense PCB layouts in space-constrained applications such as wearable medical devices and automotive sensor modules.
Can the MAX6385XS34D2-T operate reliably at low supply voltages?
Yes, the MAX6385XS34D2-T guarantees correct reset output state down to VCC = 1.0V, and functions across a full operating range of +1.0V to +5.5V. Its push-pull active-high RESET output remains valid and rail-to-rail capable even during deep brownout, ensuring deterministic behavior in battery-depleted or poorly regulated systems - a critical requirement for fail-safe operation in automotive and industrial safety-critical subsystems.
How does the MAX6385XS34D2-T handle power-supply transients?
The MAX6385XS34D2-T provides inherent immunity to short-duration negative-going VCC transients (glitches), rejecting pulses up to 100ns wide depending on overdrive magnitude. This is achieved through internal filtering and comparator hysteresis design, eliminating need for external RC snubbers in most digital-noise environments. For enhanced immunity, a 0.1μF ceramic capacitor placed close to the VCC pin is recommended - a practice validated in Maxim's typical operating circuit documentation for the MAX6385XS34D2-T.
MAX6385XS34D2-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:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS34D2-T FAQ
1.How can I place an order for MAX6385XS34D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS34D2-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 MAX6385XS34D2-T reliable?
The price and inventory of MAX6385XS34D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS34D2-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS34D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS34D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS34D2-T?
MAX6385XS34D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS34D2-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 MAX6385XS34D2-T?
For technical support, including MAX6385XS34D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS34D2-T requirements.
6.How does Aetrix verify that MAX6385XS34D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS34D2-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 MAX6385XS34D2-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS34D2-T?
All MAX6385XS34D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS34D2-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 MAX6385XS34D2-T part is unused and in its original packaging.
Return procedure for MAX6385XS34D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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