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Analog Devices Inc./Maxim Integrated MAX6385XS29D4-T
- Part No.:
- MAX6385XS29D4-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS29D4-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,614
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Product details
Overview
MAX6385XS29D4-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.93V reset threshold (±2.5% over -40°C to +125°C), 1120ms VCC reset timeout, and debounced manual reset input. It monitors single supply voltage in battery-powered embedded systems where reliable power-on reset and brownout protection are critical.
For engineers reviewing the MAX6385XS29D4-T datasheet, MAX6385XS29D4-T pinout, MAX6385XS29D4-T application, or MAX6385XS29D4-T equivalent, key selection factors include its 3μA supply current at 1.8V, guaranteed valid reset output down to VCC = 1V, 4-pin SC70 package footprint, and compatibility with manual reset switch integration without external debounce.
Technical Context
The MAX6385XS29D4-T implements a precision bandgap-based reset comparator with ±2.5% threshold accuracy across temperature, paired with a monolithic timer for deterministic 1120ms reset assertion after VCC recovery. Its internal 63kΩ MR pullup resistor enables direct connection of a momentary switch to GND.
This device operates within 1.0V–5.5V supply range and guarantees correct reset logic state even as VCC drops to 1V - enabling robust reset signaling during deep brownout conditions. It features negative-going VCC transient immunity up to 35µs at 100mV overdrive, validated per typical operating characteristics graphs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V (nominal), ±2.5% tolerance over -40°C to +125°C - ensures consistent trip point across automotive and industrial temperature ranges |
| VCC Reset Timeout | 1120ms minimum - holds μP in reset long enough for power rails and clocks to stabilize post-brownout |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors and portable devices |
| Reset Output Type | Active-high push-pull - eliminates need for external pullup resistor and supports direct interface to CMOS/TTL reset inputs |
| Manual Reset Input | Debounced MR with 63kΩ internal pullup - allows simple SPST switch-to-GND implementation without RC network or firmware debounce |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion during deep undervoltage events down to near-zero VCC |
| Reset Output Validity | Guaranteed down to VCC = 1V - maintains defined logic level through severe brownout, preventing spurious release |
Pinout & Package
MAX6385XS29D4-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 portable and wearable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail - powers internal circuitry and serves as reference for reset threshold detection |
| 2 | RESET | Active-high push-pull output - drives high during reset assertion; sinks current when deasserted; compatible with standard μP reset inputs |
| 3 | MR | Active-low manual reset input - forces reset when pulled low; internal 63kΩ pullup eliminates need for external biasing |
| 4 | GND | Analog and digital ground reference - must be connected directly to system ground plane for stable comparator operation |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.93V with ±2.5% accuracy over full temperature range - eliminates need for external resistor divider calibration |
| Low quiescent current | 3μA at 1.8V - extends battery life in always-on monitoring applications without sacrificing supervision reliability |
| Deterministic reset timeout | 1120ms minimum VCC reset period - ensures sufficient hold time for complex SoCs and PLL lock sequences |
| Integrated MR pullup | 63kΩ internal resistor - reduces BOM count and PCB area by removing discrete pullup component |
| Brownout immunity | Valid reset output guaranteed down to VCC = 1V - prevents premature release during slow power-down transitions |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG patch continuously monitoring heart activity on coin-cell power. IC Role / Device Role / Timing Role: Supervises 1.8V LDO output and asserts active-high RESET to ARM Cortex-M0+ MCU during battery voltage sag below 2.93V. Use Value: 3μA supply current enables >5-year shelf life; 1120ms timeout ensures reliable boot after cold-start from depleted battery. | Use Scenario: DIN-rail mounted analog input module operating in factory ambient (-40°C to +85°C). IC Role / Device Role / Timing Role: Monitors 3.3V system rail and provides reset to isolated microcontroller upon undervoltage or operator-initiated MR pulse. Use Value: ±2.5% threshold accuracy over temperature prevents false resets in uncontrolled environments; MR debouncing avoids contact bounce-induced reboots. |
| Automotive Body Control Units | Smart Home Hub Power Management |
Use Scenario: Low-voltage subsystem controlling door locks and lighting, powered from vehicle's 5V rail. IC Role / Device Role / Timing Role: Detects brownout on 5V supply and holds Infineon AURIX™ TC2xx in reset until rail stabilizes above 2.93V for ≥1120ms. Use Value: AEC-Q100 qualified variant available; negative-going transient immunity suppresses noise-induced resets from alternator ripple. | Use Scenario: Wi-Fi–enabled home automation hub with dual-rail power (3.3V core, 1.2V DDR). IC Role / Device Role / Timing Role: Primary supervisor for 3.3V domain; MR pin connected to front-panel reset button for field service recovery. Use Value: Push-pull active-high output interfaces directly to reset controller without level-shifting; 4-pin SC70 footprint saves space on dense consumer PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385LT29D4-T | Same electrical specs but in 6-pin μDFN (1.5mm × 1.5mm) instead of 4-pin SC70 - higher thermal resistance (θJA = 477°C/W vs. 322.6°C/W) | Suitable for thermally demanding layouts where μDFN's exposed pad improves heat dissipation, but requires larger PCB footprint | Select when board layout allows μDFN and thermal performance outweighs size constraints |
| TPS3808G33DBVR | TI part with 3.3V threshold, 200ms timeout, and 1.6μA typical ICC - lacks manual reset input and has different timeout options | Applicable where fixed 3.3V supervision suffices and MR functionality is handled externally or not required | Choose only if system does not require manual reset capability and 200ms timeout meets boot timing requirements |
Compared with MAX6385XS29D4-T, the MAX6385LT29D4-T offers identical supervision functionality in a thermally enhanced but physically larger package, while the TPS3808G33DBVR provides lower quiescent current but omits MR support and offers shorter timeout - making it unsuitable for applications requiring field-service reset or extended stabilization periods.
Availability
MAX6385XS29D4-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 and long-term production continuity.
Supply support for MAX6385XS29D4-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, mixed-signal, and power management ICs for demanding industrial, automotive, and computing applications.
The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy reset supervision for battery-operated and thermally harsh embedded systems - prioritizing guaranteed behavior across voltage and temperature extremes.
FAQ
What is the exact reset threshold voltage of MAX6385XS29D4-T and how stable is it over temperature?
The MAX6385XS29D4-T has a nominal reset threshold of 2.93V, with guaranteed tolerance of ±2.5% over the full operating range of -40°C to +125°C. This stability is achieved via laser-trimmed bandgap reference and verified by production testing - meaning the actual threshold for any given unit will fall between 2.85V and 3.00V across temperature, ensuring predictable brownout response in automotive and industrial deployments.
Does MAX6385XS29D4-T support manual reset, and what is required to implement it?
Yes, MAX6385XS29D4-T includes a debounced manual reset (MR) input with an internal 63kΩ pullup resistor to VCC. To implement, connect a normally open momentary switch between MR (pin 3) and GND. No external components are needed - the internal pullup ensures MR remains high when idle, and pulling it low for >1µs initiates a reset that persists for 1120ms after switch release.
What package type and dimensions does MAX6385XS29D4-T use, and is it RoHS-compliant?
MAX6385XS29D4-T uses a 4-pin SC70 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm with 0.65mm lead pitch. The "+T" suffix confirms it is lead(Pb)-free and RoHS-compliant. This compact footprint supports high-density layouts in wearables and handheld devices while maintaining compatibility with standard SC70 reflow profiles.
Can MAX6385XS29D4-T operate reliably during deep brownout conditions?
Yes, MAX6385XS29D4-T guarantees valid reset output down to VCC = 1V - meaning its active-high RESET signal remains logically correct (high during reset, low otherwise) even as supply voltage collapses. This ensures the connected microprocessor stays held in reset until power fully fails, preventing erratic execution or memory corruption during undervoltage transients.
How does the 1120ms reset timeout of MAX6385XS29D4-T benefit system startup timing?
The 1120ms minimum reset timeout of MAX6385XS29D4-T ensures the supervised microprocessor remains held in reset long enough for all power rails, crystal oscillators, and PLLs to achieve stable operation before code execution begins. This eliminates race conditions in complex SoCs and avoids boot failures caused by premature release - especially critical in systems with multi-stage power sequencing or slow-start regulators.
MAX6385XS29D4-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:
- 2.93V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 1.12s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6385XS29D4-T FAQ
1.How can I place an order for MAX6385XS29D4-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS29D4-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 MAX6385XS29D4-T reliable?
The price and inventory of MAX6385XS29D4-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS29D4-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS29D4-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS29D4-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS29D4-T?
MAX6385XS29D4-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS29D4-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 MAX6385XS29D4-T?
For technical support, including MAX6385XS29D4-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS29D4-T requirements.
6.How does Aetrix verify that MAX6385XS29D4-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS29D4-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 MAX6385XS29D4-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS29D4-T?
All MAX6385XS29D4-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS29D4-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 MAX6385XS29D4-T part is unused and in its original packaging.
Return procedure for MAX6385XS29D4-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6385XS29D4-T Tags
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MIC826SYMT-TR
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APX803L20-29SA-7
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