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Analog Devices Inc./Maxim Integrated MAX6381LT35D1+
- Part No.:
- MAX6381LT35D1+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 6-WFDFN
- Datasheet:
-
MAX6381LT35D1+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,555
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Product details
Overview
MAX6381LT35D1+ from Maxim Integrated is a low-power microprocessor supervisory circuit with factory-set 3.50V reset threshold, 1ms minimum reset timeout, active-low push-pull reset output, and operation down to VCC = 1.0V. It monitors +1.8V to +5.0V supply rails in space-constrained embedded systems, consuming only 3μA at +1.8V and offering ±2.5% threshold accuracy over -40°C to +125°C for reliable brownout detection in industrial controllers and portable equipment.
For engineers reviewing the MAX6381LT35D1+ datasheet, MAX6381LT35D1+ pinout, MAX6381LT35D1+ application, or MAX6381LT35D1+ equivalent, key selection factors include its fixed 3.50V reset threshold, 1ms reset timeout, SC70/μDFN package compatibility, guaranteed reset assertion down to VCC = 1V, and absence of manual reset or auxiliary voltage monitoring inputs-making it suitable for single-rail, cost-sensitive μP reset applications requiring minimal quiescent current and high temperature stability.
Technical Context
The MAX6381LT35D1+ implements a precision bandgap-based reset comparator with 60ppm/°C tempco and internal timing capacitor for deterministic 1ms reset assertion after VCC recovery. Its push-pull active-low output drives directly into μP reset inputs without external pullup, and the device guarantees valid logic states across full VCC range (1.0V–5.5V) with no need for external biasing.
Unlike variants with MR or RESET IN pins, this part lacks manual reset capability and secondary voltage monitoring-its architecture is optimized for simplicity, ultra-low power, and single-supply monitoring in battery-powered or thermally demanding environments where fast, predictable reset behavior is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.50V (factory-set, ±2.5% over -40°C to +125°C) |
| Reset Timeout | 1ms minimum (guaranteed deassertion delay after VCC exceeds threshold) |
| Supply Current | 3μA at +1.8V (enables multi-year battery life in always-on monitoring) |
| Operating Voltage | 1.0V to 5.5V (ensures functional reset assertion even during deep brownout) |
| Output Type | Active-low push-pull (directly interfaces μP reset pin; no external pullup required) |
| Temperature Range | -40°C to +125°C (supports automotive under-hood and industrial control environments) |
| Reset Propagation Delay | 35μs (fast response to VCC transients below threshold) |
Pinout & Package
MAX6381LT35D1+ is packaged in a 6-pin μDFN (2mm × 2mm, 0.5mm pitch) with wettable flanks, optimized for automated optical inspection and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for all internal circuitry and reset output sink path |
| 2 | VCC | Primary supply input and monitored voltage rail; powers internal comparator and timer |
| 3 | RESET | Active-low push-pull output; asserts low when VCC < 3.50V and holds for ≥1ms after recovery |
| 4 | N.C. | No internal connection; must be left floating or tied to GND per layout guidelines |
| 5 | N.C. | No internal connection; must be left floating or tied to GND per layout guidelines |
| 6 | N.C. | No internal connection; must be left floating or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.50V with ±2.5% tolerance over full industrial temperature range eliminates external resistor calibration |
| Ultra-low quiescent current | 3μA at 1.8V enables integration into energy-harvesting and coin-cell-powered systems |
| Guaranteed operation down to VCC = 1.0V | Ensures valid reset state during severe brownout-no external pulldown needed for push-pull output |
| Fast transient immunity | Rejects negative-going VCC glitches ≤35μs duration at 100mV overdrive, reducing false resets in noisy power domains |
| Compact μDFN packaging | 2mm × 2mm footprint saves >60% board area versus SOIC-8 alternatives while supporting reflow-compatible assembly |
Applications
| Industrial PLC I/O Modules | Portable Medical Sensors |
|---|---|
Use Scenario: Monitoring 3.3V system supply in DIN-rail mounted programmable logic controller I/O modules operating in uncontrolled ambient temperatures. IC Role / Device Role / Timing Role: Primary VCC supervisor asserting active-low reset to ARM Cortex-M4 microcontroller during brownout events. Use Value: 3.50V threshold matches 3.3V rail tolerance margin; 1ms timeout ensures firmware initialization completes before peripheral enable signals activate. | Use Scenario: Power supervision for wearable ECG sensor nodes powered by CR2032 coin cells with variable discharge profiles. IC Role / Device Role / Timing Role: Single-rail reset generator ensuring clean boot sequence when cell voltage drops below safe operating level. Use Value: 3μA supply current extends battery life beyond 5 years in sleep mode; 1.0V operational floor prevents premature reset during shallow discharge dips. |
| Automotive Body Control Units | Smart Energy Meters |
Use Scenario: Reset management for 5V microcontroller in body electronics modules exposed to -40°C cold cranking and +125°C engine bay conditions. IC Role / Device Role / Timing Role: High-temperature-stable reset source guaranteeing deterministic startup after ignition cycle interruptions. Use Value: ±2.5% threshold accuracy over full range prevents spurious resets during thermal cycling; AEC-Q100 qualified variant available. | Use Scenario: Supervising auxiliary 3.3V supply in ANSI C12.20-certified electricity meters with tamper-detection circuitry. IC Role / Device Role / Timing Role: Fail-safe reset enabler that locks meter firmware into known state during AC line sags or capacitor discharge events. Use Value: 35μs propagation delay ensures rapid response to sub-cycle voltage dips; 6-pin μDFN supports conformal coating for humidity resistance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR35D1+T | Same 3.50V threshold and 1ms timeout, but 3-pin SC70 package (smaller footprint, no N.C. pins) | Lacks μDFN thermal performance; limited to lower-power applications due to reduced power dissipation (235mW vs. 167.7mW) | Select when board area is constrained and thermal load is minimal |
| TLV803EB35DBZR | 3.5V threshold, 1ms timeout, SOT-23-3 package; higher 8μA ICC at 1.8V and ±3% threshold accuracy | Lower temperature rating (-40°C to +85°C); not AEC-Q100 qualified | Select for commercial-grade cost-sensitive designs where extended temperature range is unnecessary |
Compared with MAX6326XR35D1+T and TLV803EB35DBZR, the MAX6381LT35D1+ provides superior thermal robustness (125°C operation), tighter threshold accuracy (±2.5% vs. ±3%), and lower supply current-making it optimal for automotive, industrial, and long-life battery applications where reliability under stress is non-negotiable.
Availability
MAX6381LT35D1+ is available at Aetrix Electronics and suitable for industrial PLC I/O modules, portable medical sensors, automotive body control units, and smart energy meters requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for MAX6381LT35D1+ 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 communications markets, emphasizing high reliability, low power, and small form factors.
The MAX6381–MAX6390 family delivers single/dual low-voltage μP reset circuits targeting space-constrained, battery-operated, and thermally aggressive applications where deterministic power-on reset behavior and minimal quiescent current are essential design requirements.
FAQ
What is the exact reset threshold voltage of the MAX6381LT35D1+?
The MAX6381LT35D1+ has a factory-set reset threshold of 3.50V, with guaranteed tolerance of ±2.5% over the full operating temperature range (-40°C to +125°C). This value is laser-trimmed during production and does not require external calibration. The "35" suffix in MAX6381LT35D1+ explicitly denotes the 3.50V threshold per Maxim's ordering nomenclature.
Does the MAX6381LT35D1+ support manual reset functionality?
No, the MAX6381LT35D1+ does not include a manual reset (MR) input. It belongs to the MAX6381/MAX6382/MAX6383 subgroup, which lacks MR and RESET IN pins. Only MAX6384–MAX6390 variants feature MR, and MAX6387–MAX6389 include RESET IN. The MAX6381LT35D1+ is strictly a single-supply, factory-threshold reset supervisor with active-low push-pull output.
What package type is used for the MAX6381LT35D1+ and what are its key mechanical features?
The MAX6381LT35D1+ uses a 6-pin μDFN package (2mm × 2mm, 0.5mm pitch) with wettable flanks. This RoHS-compliant, lead-free package supports automated optical inspection (AOI) and offers superior thermal performance (167.7mW power dissipation at +70°C) compared to SC70 variants. Pin 1 is GND, Pin 2 is VCC, Pin 3 is RESET, and Pins 4–6 are no-connect terminals.
How does the reset timeout behavior work on the MAX6381LT35D1+?
The MAX6381LT35D1+ asserts its active-low RESET output whenever VCC falls below 3.50V and holds it low for a minimum of 1ms after VCC rises above the threshold. This 1ms timeout (denoted by "D1" in the part number) is generated by an internal RC timer and is guaranteed across -40°C to +125°C. The reset pulse width is not adjustable and does not depend on external components.
Is the MAX6381LT35D1+ suitable for automotive applications?
The base MAX6381LT35D1+ is rated for -40°C to +125°C and meets industrial reliability standards. While it is not itself AEC-Q100 qualified, Maxim offers automotive-grade versions (e.g., MAX6381LT35D1/V+T) with the "/V" suffix that are fully AEC-Q100 qualified. For automotive body control or infotainment modules requiring qualification, specify the /V variant; the MAX6381LT35D1+ remains appropriate for non-automotive industrial and medical applications.
MAX6381LT35D1+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WFDFN
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.5V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-µDFN (1.5x1)
MAX6381LT35D1+ FAQ
1.How can I place an order for MAX6381LT35D1+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6381LT35D1+ 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 MAX6381LT35D1+ reliable?
The price and inventory of MAX6381LT35D1+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6381LT35D1+ is usually 5 days.
3.What payment methods are accepted for MAX6381LT35D1+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6381LT35D1+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6381LT35D1+?
MAX6381LT35D1+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6381LT35D1+ 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 MAX6381LT35D1+?
For technical support, including MAX6381LT35D1+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6381LT35D1+ requirements.
6.How does Aetrix verify that MAX6381LT35D1+ is sourced from the original manufacturer or authorized distributors?
All MAX6381LT35D1+ 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 MAX6381LT35D1+ meets industry standards.
7.What is the process for return or replacement of MAX6381LT35D1+?
All MAX6381LT35D1+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6381LT35D1+, 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 MAX6381LT35D1+ part is unused and in its original packaging.
Return procedure for MAX6381LT35D1+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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