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Analog Devices Inc./Maxim Integrated MAX6381LT16D3+T
- Part No.:
- MAX6381LT16D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 6-WFDFN
- Datasheet:
-
MAX6381LT16D3+T.pdf
- Description:
- IC MPU/RESET CIRC 1.58V 6-UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,450
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Product details
Overview
MAX6381LT16D3+T from Maxim Integrated is a low-power microprocessor supervisory circuit with factory-set 1.58V reset threshold, 140ms minimum VCC reset timeout, and active-low open-drain reset output. It monitors +1.8V to +5.0V supply rails, consumes only 3μA at +1.8V, and guarantees valid reset state down to VCC = 1V - ideal for battery-powered industrial controllers and portable instrumentation requiring reliable brownout protection.
For engineers reviewing the MAX6381LT16D3+T datasheet, MAX6381LT16D3+T pinout, MAX6381LT16D3+T application, or MAX6381LT16D3+T equivalent, key selection criteria include its ±2.5% reset threshold accuracy over –40°C to +125°C, immunity to negative-going VCC transients, compatibility with dual-voltage systems via auxiliary monitoring (not applicable to this variant), and RoHS-compliant 6-pin μDFN package.
Technical Context
The MAX6381LT16D3+T implements a precision bandgap-based voltage comparator with internal 1.58V reference and a monostable timer for reset assertion. Its open-drain RESET output requires an external pullup resistor and remains asserted for ≥140ms after VCC rises above 1.58V, ensuring stable μP initialization during power-up and brownout recovery.
No manual reset (MR) input or auxiliary RESET IN functionality is integrated in this variant - it is a single-supply, fixed-threshold, open-drain reset monitor optimized for simplicity and ultra-low quiescent current in space-constrained embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.58V (factory-trimmed, ±2.5% over –40°C to +125°C) - ensures reliable detection of 1.8V rail collapse before logic corruption occurs. |
| VCC Reset Timeout | 140ms minimum - holds reset long enough for slow-ramping supplies and downstream regulators to stabilize. |
| Supply Current | 3μA at +1.8V - enables multi-year operation from coin-cell batteries in always-on monitoring applications. |
| Operating Voltage Range | +1.0V to +5.5V - supports valid reset assertion even during deep brownout conditions down to 1V. |
| Output Type | Active-low open-drain - allows wired-OR configuration with other reset sources and flexible voltage-level translation via external pullup. |
| Package | 6-pin μDFN (2mm × 2mm, 0.5mm pitch) - provides thermal performance (θJA = 477°C/W) suitable for high-density PCB layouts. |
| Temperature Range | –40°C to +125°C - qualified for under-hood automotive and industrial control environments. |
Pinout & Package
6-pin μDFN package (Outline Number 21-0147, Land Pattern 90-0080), 2mm × 2mm body, 0.5mm pitch, exposed pad for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for all internal circuitry and reset comparator; must be connected to system ground plane for noise immunity. |
| 2 | VCC | Primary supply input and monitored voltage source; powers internal circuitry and feeds reset comparator. |
| 3 | N.C. | No internal connection; left floating or tied to GND per layout best practices - no functional impact. |
| 4 | RESET | Active-low open-drain reset output; requires external pullup resistor (typically 10kΩ) to host supply voltage. |
| 5 | N.C. | No internal connection; electrically isolated - no routing or termination required. |
| 6 | N.C. | No internal connection; unused pin - may be left unconnected or grounded for mechanical stability. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 1.58V reset threshold | Eliminates external resistor divider, reducing BOM count and layout area while guaranteeing ±2.5% accuracy across full temperature range. |
| 140ms minimum reset timeout | Ensures μP reset remains asserted through slow-start DC/DC converters and FPGA configuration sequences without requiring external timing components. |
| 3μA supply current at +1.8V | Enables integration into energy-harvesting and battery-backed systems where standby current directly impacts service life. |
| Open-drain RESET output | Supports level-shifting to higher-voltage logic domains (e.g., 3.3V or 5V) and enables multiple reset sources to share a common reset bus. |
| Valid operation down to VCC = 1V | Prevents spurious deassertion during deep undervoltage events, maintaining system integrity until complete power loss. |
Applications
| Portable/Battery-Powered Equipment | Critical μP and μC Power Monitoring |
|---|---|
Use Scenario: Handheld test instrument powered by single Li-ion cell with dynamic load causing intermittent 1.8V rail sag. IC Role / Device Role / Timing Role: Supervisory circuit asserting open-drain RESET to halt processor execution during brownout, holding reset for ≥140ms post-recovery. Use Value: Prevents corrupted firmware execution and flash write errors during voltage instability, extending field reliability without adding discrete components. | Use Scenario: Industrial PLC controller with 1.8V core supply and 3.3V I/O domain requiring coordinated reset sequencing. IC Role / Device Role / Timing Role: Dedicated 1.58V reset monitor for the 1.8V rail, driving shared reset bus via open-drain output pulled to 3.3V. Use Value: Enables clean, synchronized reset of both core and I/O subsystems using a single low-current supervisor, reducing timing margin uncertainty. |
| Computers | Dual Voltage Systems |
Use Scenario: Embedded x86 SBC with 1.8V SoC core and independent 3.3V peripheral supply. IC Role / Device Role / Timing Role: Primary reset supervisor for the 1.8V domain, providing guaranteed reset hold time during cold start and AC dropout. Use Value: Eliminates need for RC-based reset timers subject to component drift, ensuring consistent boot behavior across production units and temperature extremes. | Use Scenario: Automotive ADAS camera module with separate 1.8V image sensor core and 2.8V ISP supply. IC Role / Device Role / Timing Role: Standalone reset detector for the 1.8V rail, interfacing with system PMIC via open-drain signal to trigger coordinated power sequencing. Use Value: Provides AEC-Q100-compatible supervision (via /V variants) without requiring dual-input monitoring - simplifies design while meeting ASIL-B functional safety prerequisites. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3+T | Same 1.58V threshold and 140ms timeout, but push-pull active-low output; 3-pin SC70 package. | Lacks open-drain flexibility; incompatible with wired-OR or level-shifted reset buses. | Select when board space is constrained and no shared reset bus exists. |
| TPS3808G15DBVR | 1.55V threshold (±0.5%), 200ms timeout, 1.8–6V operation; SOT-23-5 package with enable input. | Includes programmable enable and tighter threshold tolerance, but higher 12μA quiescent current. | Select when higher accuracy and system-level enable control outweigh ultra-low power requirements. |
Compared with MAX809TRD3+T, MAX6381LT16D3+T offers open-drain output for bus sharing and superior low-power performance; compared with TPS3808G15DBVR, it delivers 4× lower supply current at 1.8V but trades off threshold precision and enable functionality for cost and simplicity.
Availability
MAX6381LT16D3+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, critical μP and μC power monitoring, and dual voltage systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6381LT16D3+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 MAX6381–MAX6390 family delivers single/dual low-voltage microprocessor reset circuits targeting space- and power-constrained embedded systems where deterministic reset behavior under brownout and transient conditions is critical.
FAQ
What is the exact reset threshold voltage of MAX6381LT16D3+T and how accurate is it over temperature?
The MAX6381LT16D3+T has a factory-set reset threshold of 1.58V, specified with ±2.5% accuracy over the full operating temperature range of –40°C to +125°C. This tolerance is guaranteed by design and applies to all units, ensuring consistent brownout detection across automotive and industrial environments without calibration.
Does MAX6381LT16D3+T include a manual reset (MR) input or auxiliary voltage monitor (RESET IN)?
No, MAX6381LT16D3+T does not include MR or RESET IN functionality. It is a basic single-supply reset supervisor with only VCC, GND, and open-drain RESET pins. Manual reset capability is present only in MAX6384–MAX6386 and MAX6390 variants; auxiliary monitoring is exclusive to MAX6387–MAX6389.
What is the minimum VCC voltage at which MAX6381LT16D3+T guarantees correct RESET output state?
MAX6381LT16D3+T guarantees valid RESET output logic state down to VCC = 1.0V. Below this voltage, the internal circuitry cannot maintain defined output behavior - designers must ensure system-level handling (e.g., external pulldown) if operation near 0V is required, though this is not supported by MAX6381LT16D3+T itself.
Can MAX6381LT16D3+T be used in automotive applications?
Yes, MAX6381LT16D3+T is rated for –40°C to +125°C and is AEC-Q100 qualified when ordered with the /V suffix (e.g., MAX6381LT16D3/V+T). The standard MAX6381LT16D3+T is suitable for industrial-grade automotive cabin or under-dash applications but lacks formal automotive qualification documentation unless explicitly ordered with /V.
What package type and footprint does MAX6381LT16D3+T use, and is thermal performance documented?
MAX6381LT16D3+T uses a 6-pin μDFN package (2mm × 2mm, 0.5mm pitch, Outline Number 21-0147). Thermal resistance is documented as θJA = 477°C/W and θJC = 122°C/W on a multilayer board per JEDEC JESD51-7, enabling accurate junction temperature estimation in thermally demanding layouts.
MAX6381LT16D3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.58V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-µDFN (1.5x1)
MAX6381LT16D3+T FAQ
1.How can I place an order for MAX6381LT16D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6381LT16D3+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 MAX6381LT16D3+T reliable?
The price and inventory of MAX6381LT16D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6381LT16D3+T is usually 5 days.
3.What payment methods are accepted for MAX6381LT16D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6381LT16D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6381LT16D3+T?
MAX6381LT16D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6381LT16D3+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 MAX6381LT16D3+T?
For technical support, including MAX6381LT16D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6381LT16D3+T requirements.
6.How does Aetrix verify that MAX6381LT16D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6381LT16D3+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 MAX6381LT16D3+T meets industry standards.
7.What is the process for return or replacement of MAX6381LT16D3+T?
All MAX6381LT16D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6381LT16D3+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 MAX6381LT16D3+T part is unused and in its original packaging.
Return procedure for MAX6381LT16D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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