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Analog Devices Inc./Maxim Integrated MAX6383LT44D3+T
- Part No.:
- MAX6383LT44D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 6-WFDFN
- Datasheet:
-
MAX6383LT44D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,906
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Product details
Overview
MAX6383LT44D3+T from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 4.38V reset threshold (±2.5% over -40°C to +125°C), 140ms minimum reset timeout, and 3μA supply current at +1.8V. It monitors single VCC supply in battery-powered embedded systems where reliable power-on reset and brownout protection are critical.
For engineers reviewing the MAX6383LT44D3+T datasheet, MAX6383LT44D3+T pinout, MAX6383LT44D3+T application, or MAX6383LT44D3+T equivalent, this page delivers verified specifications, package mapping, real-world use cases, and validated alternative options for industrial control, portable instrumentation, and dual-rail power monitoring designs.
Technical Context
The MAX6383LT44D3+T implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy across -40°C to +125°C, paired with a temperature-stable monostable timer generating a guaranteed-minimum 140ms reset assertion after VCC recovery. Its open-drain RESET output requires an external pullup and remains valid down to VCC = 1.0V.
No manual reset (MR) or auxiliary RESET IN inputs are integrated - this variant is optimized for simple single-supply monitoring without user-initiated or secondary-voltage supervision. It belongs to the MAX6381–MAX6390 family sharing BiCMOS process, SC70/μDFN packaging, and AEC-Q100-qualified variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38V nominal (4.27V min / 4.48V max at +25°C); ensures reliable detection of VCC drop below 4.4V in 5V or 4.5V systems |
| Reset Timeout | 140ms minimum; guarantees μP remains held 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 wearables |
| Operating Voltage | 1.0V to 5.5V; supports valid reset assertion even during deep brownout down to 1.0V VCC |
| Reset Output Type | Open-drain active-low; allows wired-OR configuration with other reset sources and flexible voltage-level translation via external pullup |
| Threshold Accuracy | ±2.5% over full -40°C to +125°C range; eliminates need for external calibration in automotive and industrial environments |
| Transient Immunity | Rejects negative-going VCC glitches ≤35µs at 100mV overdrive; prevents spurious resets in electrically noisy systems |
Pinout & Package
MAX6383LT44D3+T is packaged in a 6-pin μDFN (1.5mm × 1.0mm, 0.5mm pitch) with wettable flanks, RoHS-compliant and lead-free (+T suffix). Pin 1 is RESET (open-drain active-low), Pin 4 is VCC, Pin 6 is GND; Pins 2, 3, and 5 are no-connect (N.C.).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Open-drain active-low reset output; requires external pullup resistor; sinks ≥80µA at VCC ≥1.0V with VOL ≤0.3V |
| 2 | N.C. | No internal connection; must be left floating or tied to GND/VCC per layout best practice; no electrical function |
| 3 | N.C. | No internal connection; unused silicon pad; no routing or thermal tie required |
| 4 | VCC | Main supply input (1.0V–5.5V); powers internal comparator and timer; also monitored voltage source |
| 5 | N.C. | No internal connection; electrically isolated; no impact on functionality or reliability |
| 6 | GND | Analog/digital ground reference; must be low-impedance connection to system ground plane for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 4.38V with ±2.5% tolerance over full industrial temperature range - eliminates external resistor divider and calibration effort |
| Ultra-low quiescent current | 3μA at 1.8V enables >10-year battery life in always-on monitoring nodes without compromising reset reliability |
| Valid reset down to 1.0V VCC | Guarantees clean, deterministic reset assertion even during severe brownout - prevents μP lockup or undefined state |
| Open-drain output architecture | Supports mixed-voltage systems (e.g., 3.3V RESET line driving 1.8V μP) and multi-source reset bus arbitration |
| High noise immunity | 35µs glitch rejection at 100mV overdrive ensures robust operation in motor drives, power supplies, and EMI-heavy enclosures |
Applications
| Industrial PLC I/O Module | Portable Medical Sensor Hub |
|---|---|
|
Use Scenario: Monitors 3.3V logic rail in DIN-rail mounted programmable logic controller I/O modules exposed to wide ambient temperature swings and conducted transients. IC Role / Device Role / Timing Role: Single-supply voltage supervisor asserting active-low reset to ARM Cortex-M4 microcontroller during undervoltage events. Use Value: Prevents firmware corruption during AC line sags by holding μP in reset until 3.3V stabilizes for ≥140ms - meeting IEC 61000-4-11 immunity requirements. |
Use Scenario: Powers on/off sequence control in handheld glucose meters using CR2032 coin cell and low-dropout regulators. IC Role / Device Role / Timing Role: Primary reset generator ensuring microcontroller boots only when regulated 1.8V core supply reaches valid level. Use Value: 3μA supply current extends battery life beyond 3 years; 4.38V threshold rejects false triggers from 5V USB charging transients. |
| Automotive Body Control Module (BCM) | Dual-Rail Industrial Camera |
|
Use Scenario: Supervises 5V domain in non-safety-critical BCM subsystems operating from vehicle battery (9V–16V) with LDO regulation. IC Role / Device Role / Timing Role: Resets Infineon AURIX TC2xx microcontroller upon detected 5V rail collapse during cold-crank conditions. Use Value: ±2.5% threshold accuracy over -40°C to +125°C eliminates recalibration; AEC-Q100 qualified variants available (e.g., MAX6383LT44D3/V+T). |
Use Scenario: Ensures synchronized startup of image sensor (2.8V) and FPGA (1.2V) in machine vision cameras powered from shared 5V input. IC Role / Device Role / Timing Role: Monitors 2.8V I/O rail and asserts reset to FPGA until stable - enabling safe configuration loading. Use Value: Open-drain output allows shared reset bus with other supervisors; 140ms timeout accommodates slow-starting DC-DC converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR44D3+T | Same 4.38V threshold and 140ms timeout, but push-pull active-low output; no external pullup needed | Preferred where board space prohibits pullup resistor or where faster rise time (<100ns) is required | Select MAX6326XR44D3+T if system uses single-voltage rail and does not require wired-OR reset bus capability |
| TLV803EC43DBZR | 4.3V threshold (±1%), 140ms timeout, 0.5μA typical ICC at 1.8V; SOT-23-3 package | Better suited for ultra-low-power designs; lacks AEC-Q100 qualification and high-temp performance | Choose TLV803EC43DBZR only for cost-sensitive consumer applications below +85°C ambient |
Compared with MAX6383LT44D3+T, MAX6326XR44D3+T simplifies layout by eliminating the pullup resistor but forfeits bus-sharing flexibility, while TLV803EC43DBZR reduces current draw by 83% yet sacrifices automotive-grade reliability and extended temperature support.
Availability
MAX6383LT44D3+T is available at Aetrix Electronics and suitable for industrial control systems, portable medical devices, automotive body electronics, and dual-rail imaging equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6383LT44D3+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 demanding industrial, automotive, and computing applications, with emphasis on low-power, high-reliability solutions.
The MAX6381–MAX6390 family was engineered specifically for microprocessor reset supervision in space-constrained, battery-sensitive, and thermally harsh environments - delivering guaranteed timing, tight voltage thresholds, and minimal quiescent current in miniature packages.
FAQ
What is the exact reset threshold voltage of MAX6383LT44D3+T and how tightly is it specified?
The MAX6383LT44D3+T has a factory-set nominal reset threshold of 4.38V, with a minimum of 4.27V and maximum of 4.48V at +25°C. Over the full operating temperature range (-40°C to +125°C), the threshold remains within ±2.5% of nominal, meaning it stays between 4.27V and 4.48V across all conditions - confirmed in the Electrical Characteristics table under "VCC Reset Threshold".
Does MAX6383LT44D3+T include a manual reset input (MR) or auxiliary voltage monitor (RESET IN)?
No. The MAX6383LT44D3+T is a single-supply, open-drain reset supervisor with no MR or RESET IN pins. This is confirmed by the Selector Guide table (page 9), Pin Configurations (page 10), and the "Features" section - only MAX6384–MAX6386 and MAX6390 include MR, and only MAX6387–MAX6389 include RESET IN.
What package type and footprint does MAX6383LT44D3+T use, and are land patterns available?
MAX6383LT44D3+T uses a 6-pin μDFN package (1.5mm × 1.0mm, 0.5mm pitch) with outline number 21-0147 and land pattern number 90-0080. The package drawing and recommended PCB footprint are published by Maxim Integrated at maximintegrated.com/packages - no SC70 variant exists for this specific part number.
Can MAX6383LT44D3+T operate reliably down to 1.0V VCC, and what happens to the RESET output below that?
Yes - the MAX6383LT44D3+T guarantees correct RESET output logic state for VCC ≥ 1.0V, as stated in the "Reset Output State Guaranteed Valid Down to VCC = 1V" feature and Electrical Characteristics table. Below 1.0V, the device ceases functional operation; the open-drain RESET pin enters high-impedance state and relies on the external pullup to maintain logic-high level.
Is MAX6383LT44D3+T qualified for automotive applications, and what suffix indicates that qualification?
The base MAX6383LT44D3+T is not automotive-qualified. Automotive qualification requires the /V suffix (e.g., MAX6383LT44D3/V+T), which denotes AEC-Q100 Grade 2 (-40°C to +105°C) or Grade 1 (-40°C to +125°C) compliance - explicitly noted in the Ordering Information section and Package Information table.
MAX6383LT44D3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.38V
- Output:
- Open Drain or Open Collector
- 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)
MAX6383LT44D3+T FAQ
1.How can I place an order for MAX6383LT44D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6383LT44D3+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 MAX6383LT44D3+T reliable?
The price and inventory of MAX6383LT44D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6383LT44D3+T is usually 5 days.
3.What payment methods are accepted for MAX6383LT44D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6383LT44D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6383LT44D3+T?
MAX6383LT44D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6383LT44D3+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 MAX6383LT44D3+T?
For technical support, including MAX6383LT44D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6383LT44D3+T requirements.
6.How does Aetrix verify that MAX6383LT44D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6383LT44D3+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 MAX6383LT44D3+T meets industry standards.
7.What is the process for return or replacement of MAX6383LT44D3+T?
All MAX6383LT44D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6383LT44D3+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 MAX6383LT44D3+T part is unused and in its original packaging.
Return procedure for MAX6383LT44D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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