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Analog Devices Inc./Maxim Integrated MAX6383XR44D3+
- Part No.:
- MAX6383XR44D3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6383XR44D3+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,103
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Product details
Overview
MAX6383XR44D3+ 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 or space-constrained embedded systems requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6383XR44D3+ datasheet, MAX6383XR44D3+ pinout, MAX6383XR44D3+ application, or MAX6383XR44D3+ equivalent, key selection criteria include open-drain reset compatibility with shared bus lines, guaranteed reset validity down to VCC = 1V, ±2.5% threshold accuracy across automotive temperature range, and SC70-3 package footprint constraints.
Technical Context
The MAX6383XR44D3+ implements a precision bandgap-based voltage comparator monitoring VCC against a fixed 4.38V threshold, with internal timer asserting reset for ≥140ms after VCC recovers. Its open-drain RESET output requires an external pullup resistor and supports wired-OR configurations in multi-rail systems.
No manual reset (MR) input or auxiliary RESET IN functionality is integrated - this variant is optimized for single-supply monitoring only. The device operates from 1.0V to 5.5V supply and guarantees correct logic state of RESET down to VCC = 1V, enabling robust behavior during deep brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38V nominal (4.27V–4.48V min/max), ±2.5% accuracy over -40°C to +125°C - ensures consistent trip point across automotive and industrial environments |
| Reset Timeout | 140ms minimum - provides sufficient hold time for μP initialization before release, compatible with typical boot ROM timing |
| Supply Current | 3μA at +1.8V - enables >10-year battery life in coin-cell-powered IoT sensors and portable instrumentation |
| Operating Voltage | 1.0V to 5.5V - supports valid reset assertion even during severe undervoltage, critical for fail-safe shutdown sequencing |
| RESET Output Type | Open-drain active-low - allows direct connection to shared reset buses and level-shifting via external pullup |
| Output Sink Capability | 3.2mA at VCC ≥ 4.5V (VOL ≤ 0.4V) - drives standard CMOS inputs without additional buffering |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive, industrial control, and high-reliability embedded applications |
Pinout & Package
MAX6383XR44D3+ is housed in a 3-pin SC70 package (package code X3+2), measuring 2.0mm × 2.1mm × 0.95mm, with 0.65mm pin pitch and RoHS-compliant lead-free finish.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (open-drain) | Active-low reset output requiring external pullup; sinks current when asserted; floats high when deasserted |
| 2 | VCC | Main supply input and monitored voltage rail; powers internal circuitry and sets comparator reference |
| 3 | GND | Analog and digital ground reference; must be low-impedance connection to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 4.38V with ±2.5% tolerance over full temperature range - eliminates need for external resistor dividers or calibration |
| Negative-going VCC transient immunity | Rejects glitches <140µs wide at 100mV overdrive - prevents spurious resets during switching noise or ESD events |
| Low-voltage operation guarantee | Valid RESET output state maintained down to VCC = 1V - ensures deterministic behavior during deep brownout recovery |
| Ultra-low quiescent current | 3μA at +1.8V - reduces standby power in always-on edge nodes and energy-harvesting systems |
| Small-footprint packaging | 3-pin SC70 (2.0mm × 2.1mm) - saves PCB area in wearables, medical patches, and compact modules |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
|
Use Scenario: Monitors 5V system rail in programmable logic controller I/O expansion module subject to load dump and cold-crank transients. IC Role / Device Role / Timing Role: Supervisory circuit providing power-on reset and brownout detection; asserts open-drain RESET until VCC stabilizes above 4.38V for ≥140ms. Use Value: Prevents firmware corruption during unstable power-up; open-drain output interfaces directly with shared reset bus across multiple ASICs on same board. |
Use Scenario: Embedded in door module controlling window lift, mirror fold, and interior lighting, powered from vehicle's 12V-to-5V DC/DC converter. IC Role / Device Role / Timing Role: Single-rail supervisor ensuring microcontroller enters safe state during ignition cycling and battery voltage sag below 4.38V. Use Value: -40°C to +125°C operation meets AEC-Q100 requirements; 3μA supply current minimizes parasitic drain on vehicle battery during sleep mode. |
| Portable Medical Sensor Hub | Smart Energy Meter MCU Subsystem |
|
Use Scenario: Powers clinical-grade pulse oximeter sensor node using CR2032 coin cell; VCC derived from low-quiescent LDO. IC Role / Device Role / Timing Role: Monitors regulated 3.3V rail; triggers reset if battery voltage drops below 4.38V × (3.3V/5V) ≈ 2.89V due to aging or cold temperature. Use Value: 140ms timeout aligns with BLE SoC wake-up and ADC initialization sequence; 3μA ICC extends operational life beyond 5 years. |
Use Scenario: Embedded in revenue-grade electricity meter where MCU must remain in reset during AC line dropout or surge-induced rail collapse. IC Role / Device Role / Timing Role: Primary VCC supervisor for ARM Cortex-M based metrology subsystem; open-drain RESET tied to hardware reset pin of main MCU and isolated communication IC. Use Value: ±2.5% threshold accuracy ensures repeatable trip point across meter lifetime and temperature extremes; SC70-3 footprint fits tight layout near metering IC. |
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 | 4.63V reset threshold (±2.5%), 240ms timeout, push-pull active-low output, same SC70-3 package | Higher threshold better suited for 5V systems; push-pull eliminates need for external pullup but lacks wired-OR capability | Select when shared reset bus is not required and higher trip voltage improves noise margin on clean 5V rails |
| TPS3808G33DBVR | 3.08V threshold (±0.5%), 200ms timeout, open-drain active-low, SOT-23-5 package with enable pin | Lower threshold targets 3.3V systems; enable pin adds power-gating control absent in MAX6383XR44D3+ | Choose when precise 3.3V supervision and dynamic reset enable/disable are needed, accepting larger footprint and different pin count |
Compared with MAX809TRD3+T and TPS3808G33DBVR, MAX6383XR44D3+ offers optimal balance of 4.38V threshold for mixed 3.3V/5V designs, minimal 3-pin footprint, and open-drain flexibility - making it preferred for cost-sensitive, space-constrained applications where reset bus sharing is essential.
Availability
MAX6383XR44D3+ is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, portable medical sensor hubs, smart energy meter MCU subsystems, and dual-voltage embedded controllers requiring stable component supply across extended temperature ranges.
Supply support for MAX6383XR44D3+ 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 communications applications.
The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy voltage supervision for microprocessor reset in space- and power-constrained systems - specifically engineered for reliability in automotive (-40°C to +125°C) and industrial environments.
FAQ
What is the exact reset threshold voltage of MAX6383XR44D3+ and how tightly is it specified?
The MAX6383XR44D3+ has a factory-set nominal reset threshold of 4.38V, with guaranteed limits of 4.27V (min) and 4.48V (max) at +25°C. Over the full operating temperature range of -40°C to +125°C, the threshold remains within ±2.5% of nominal - meaning 4.27V to 4.48V at room temperature tightens to 4.27V × 0.975 ≈ 4.16V (min) and 4.48V × 1.025 ≈ 4.59V (max) across temperature. This specification is confirmed in the Electrical Characteristics table of the MAX6381–MAX6390 datasheet Rev 6.
Does MAX6383XR44D3+ include a manual reset (MR) input or auxiliary RESET IN pin?
No, MAX6383XR44D3+ does not include a manual reset (MR) input or auxiliary RESET IN pin. Per the Selector Guide and Pin Description tables, MR is only present on MAX6384/MAX6385/MAX6386/MAX6390, and RESET IN is exclusive to MAX6387/MAX6388/MAX6389. The MAX6383XR44D3+ is a single-supply, open-drain reset supervisor with only RESET, VCC, and GND pins - confirmed by its 3-pin SC70 pinout and functional block diagram.
What is the minimum reset timeout period for MAX6383XR44D3+ and how is it implemented?
The MAX6383XR44D3+ provides a minimum reset timeout period of 140ms, denoted by the "D3" suffix in its part number. This is a factory-programmed, internally generated delay that holds the open-drain RESET output low for ≥140ms after VCC rises above the 4.38V threshold. The timeout is implemented using a precision RC oscillator and counter, with normalized variation of ±5% over temperature - verified in the Typical Operating Characteristics graph "NORMALIZED POWER-UP RESET TIMEOUT vs. TEMPERATURE".
Can MAX6383XR44D3+ operate reliably at VCC = 1.0V, and what is the RESET output behavior at that voltage?
Yes, MAX6383XR44D3+ is fully specified to operate down to VCC = 1.0V, and its RESET output state is guaranteed valid at that voltage. When VCC ≥ 1.0V, the open-drain RESET pin correctly asserts low during undervoltage and releases high (via external pullup) when VCC exceeds 4.38V for ≥140ms. Below 1.0V, operation is not guaranteed - this 1.0V lower limit is explicitly stated in the Absolute Maximum Ratings and Electrical Characteristics sections of the datasheet.
Is MAX6383XR44D3+ pin-compatible with other members of the MAX6381–MAX6390 family in the same package?
Yes, MAX6383XR44D3+ is pin-compatible with all 3-pin SC70 variants in the MAX6381–MAX6390 family, including MAX6381XRxxDx+, MAX6382XRxxDx+, and MAX6383XRxxDx+. All share identical pin 1 (RESET), pin 2 (VCC), and pin 3 (GND) assignments and electrical tolerances. However, functional differences exist - e.g., MAX6381/MAX6382 offer push-pull outputs, while MAX6383 uses open-drain - so replacement requires verification of reset logic polarity and drive strength.
MAX6383XR44D3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- 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:
- SC-70-3
MAX6383XR44D3+ FAQ
1.How can I place an order for MAX6383XR44D3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6383XR44D3+ 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 MAX6383XR44D3+ reliable?
The price and inventory of MAX6383XR44D3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6383XR44D3+ is usually 5 days.
3.What payment methods are accepted for MAX6383XR44D3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6383XR44D3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6383XR44D3+?
MAX6383XR44D3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6383XR44D3+ 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 MAX6383XR44D3+?
For technical support, including MAX6383XR44D3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6383XR44D3+ requirements.
6.How does Aetrix verify that MAX6383XR44D3+ is sourced from the original manufacturer or authorized distributors?
All MAX6383XR44D3+ 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 MAX6383XR44D3+ meets industry standards.
7.What is the process for return or replacement of MAX6383XR44D3+?
All MAX6383XR44D3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6383XR44D3+, 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 MAX6383XR44D3+ part is unused and in its original packaging.
Return procedure for MAX6383XR44D3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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