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Analog Devices Inc./Maxim Integrated MAX6383XR31D3+T
- Part No.:
- MAX6383XR31D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6383XR31D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,749
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Product details
Overview
MAX6383XR31D3+T from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 3.08V reset threshold (±2.5% over –40°C to +125°C), and 140ms minimum reset timeout period. It monitors VCC from +1.8V to +5.0V while consuming only 3μA at +1.8V, and guarantees valid reset state down to VCC = 1V - used in battery-powered instrumentation and embedded controllers requiring reliable brownout detection.
For engineers reviewing the MAX6383XR31D3+T datasheet, MAX6383XR31D3+T pinout, MAX6383XR31D3+T application, or MAX6383XR31D3+T equivalent, key selection criteria include its 3-pin SC70 open-drain configuration, ±2.5% threshold accuracy across automotive temperature range, guaranteed operation at VCC ≥ 1V, and immunity to negative-going VCC transients up to 35µs at 100mV overdrive.
Technical Context
The MAX6383XR31D3+T implements a precision voltage comparator with internal 3.08V reference and an on-chip timer that asserts reset for ≥140ms after VCC rises above threshold. Its open-drain RESET output requires an external pullup resistor and remains functional down to VCC = 1V, enabling robust power-fail signaling in low-voltage systems.
No manual reset (MR) input or auxiliary RESET IN is included - this variant belongs to the MAX6383 subgroup defined by 3-pin SC70 packaging, open-drain active-low reset, and absence of MR/RESET IN terminals. It shares pin compatibility with MAX809/MAX810 but differs in threshold accuracy and transient immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V nominal, ±2.5% over –40°C to +125°C - ensures stable trip point across automotive temperature range without external calibration |
| Reset Timeout | 140ms minimum - provides sufficient hold time for microprocessor initialization during power-up or brownout recovery |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered portable devices |
| Operating Voltage | +1.0V to +5.5V - supports valid reset assertion even during deep undervoltage conditions down to 1V |
| Output Type | Open-drain active-low - allows wired-OR reset bus configuration and level translation via external pullup |
| Transient Immunity | Rejects negative VCC glitches ≤35µs at 100mV overdrive - prevents spurious resets in noisy power environments |
| Package | 3-pin SC70 (X3+2 outline) - ultra-small footprint suitable for space-constrained PCB layouts |
Pinout & Package
MAX6383XR31D3+T is housed in a 3-pin SC70 package (outline 21-0075, land pattern 90-0208), with pins arranged as follows:
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (open-drain) | Active-low reset output requiring external pullup; sinks current when asserted; high-impedance when deasserted |
| 2 | VCC | Main supply input and monitored voltage source; powers internal circuitry and sets reset threshold reference |
| 3 | GND | Analog and digital ground reference; must be connected directly to system ground plane for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.08V with ±2.5% tolerance over full –40°C to +125°C range - eliminates need for external resistor divider or calibration |
| Ultra-low quiescent current | 3μA at +1.8V - extends battery life in always-on monitoring applications such as IoT sensors and portable medical devices |
| Valid reset down to VCC = 1V | Guaranteed logic state integrity during deep brownout - ensures microcontroller enters safe reset before supply collapse |
| Negative transient rejection | Immune to VCC glitches ≤35µs duration at 100mV overdrive - avoids false resets in electrically noisy industrial environments |
| SC70 package compatibility | Pins match MAX809/MAX810 footprints - enables drop-in replacement without PCB redesign in legacy designs |
Applications
| Battery-Powered Instrumentation | Industrial Microcontroller Monitoring |
|---|---|
Use Scenario: Portable handheld multimeter operating from single Li-ion cell with dynamic load-induced voltage sags. IC Role / Device Role / Timing Role: Supervisory circuit detecting VCC drops below 3.08V and asserting open-drain reset for ≥140ms to halt firmware execution during brownout. Use Value: Prevents corrupted memory writes and erratic behavior during intermittent power loss, leveraging 3μA supply current to maximize runtime. | Use Scenario: PLC I/O module powered by isolated DC-DC converter subject to EMI-induced VCC transients. IC Role / Device Role / Timing Role: Primary reset supervisor asserting active-low signal on shared reset bus; open-drain output enables wired-OR with other system supervisors. Use Value: 35µs transient immunity prevents nuisance resets caused by switching noise, while ±2.5% threshold stability ensures consistent trip point across temperature extremes. |
| Automotive Body Control Module | Low-Voltage Embedded Controller |
Use Scenario: BCM subassembly powered from vehicle battery with cold-crank voltage dips to 6V and load-dump spikes. IC Role / Device Role / Timing Role: Monitors regulated 3.3V rail derived from buck converter; asserts reset if rail falls below 3.08V for >140ms during cranking event. Use Value: AEC-Q100 qualified version available; guaranteed operation from –40°C to +125°C ensures reliability in under-hood environments. | Use Scenario: Wearable health monitor using 1.8V core voltage supplied by LDO with tight regulation margin. IC Role / Device Role / Timing Role: Reset generator ensuring processor remains held in reset until 1.8V rail stabilizes above 3.08V × (1 – 2.5%) = 3.00V, then releases after 140ms delay. Use Value: Valid reset assertion down to VCC = 1V prevents premature release during slow-ramp power-up sequences typical of low-noise LDOs. |
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 3-pin SC70 package and open-drain active-low output; 3.08V threshold with ±2.5% accuracy; 240ms reset timeout (vs. 140ms) | Lacks guaranteed operation below VCC = 1.2V; no specified transient immunity data; not AEC-Q100 qualified | Select when longer reset hold time is acceptable and automotive qualification is unnecessary |
| TPS3808G30DBVR | 3-pin SOT-23 package; 3.0V threshold (±0.5%); 200ms timeout; 1.8V to 6.0V operating range; 1.6μA typical ICC | Higher threshold accuracy but different pinout (VCC/GND/RESET vs. RESET/VCC/GND); no published transient immunity specs | Choose for ultra-low power (<2μA) and tighter threshold tolerance where SC70 footprint is not mandatory |
Compared with MAX809TRD3+T and TPS3808G30DBVR, MAX6383XR31D3+T offers the shortest standard timeout (140ms) with verified VCC = 1V operation and documented transient rejection - critical for fast-recovery systems and automotive-grade designs requiring validated noise immunity.
Availability
MAX6383XR31D3+T is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial microcontroller monitoring, and automotive body control modules requiring stable component supply with RoHS-compliant packaging and AEC-Q100 qualification path.
Supply support for MAX6383XR31D3+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.
The MAX6381–MAX6390 family delivers low-power, high-accuracy μP supervisory circuits optimized for reliable reset generation in space- and power-constrained systems operating across extended temperature ranges.
FAQ
What is the exact reset threshold voltage of MAX6383XR31D3+T and how does it vary with temperature?
The MAX6383XR31D3+T has a factory-set nominal reset threshold of 3.08V, with guaranteed tolerance of ±2.5% over the full operating temperature range of –40°C to +125°C. This means the actual threshold remains between 3.00V and 3.15V across all temperatures. The device exhibits a tempco of 60ppm/°C, contributing to its tight stability. This specification is confirmed in the Electrical Characteristics table of the official MAX6381–MAX6390 datasheet.
Does MAX6383XR31D3+T include a manual reset (MR) input or auxiliary RESET IN pin?
No, MAX6383XR31D3+T does not include a manual reset (MR) input or auxiliary RESET IN pin. It belongs to the MAX6383 subgroup, which uses the 3-pin SC70 package with only RESET, VCC, and GND terminals. MR functionality is present only in 4-pin SC70 or 6-pin μDFN variants like MAX6384–MAX6386 and MAX6390. This is clearly shown in the Pin Description table and Selector Guide in the datasheet.
What is the minimum VCC voltage at which MAX6383XR31D3+T guarantees correct reset output logic state?
MAX6383XR31D3+T guarantees valid reset output logic state down to VCC = 1.0V. When VCC drops below the 3.08V threshold, the open-drain RESET output pulls low; when VCC rises above threshold, RESET remains low for ≥140ms, then transitions to high-impedance. This guarantee holds across –40°C to +125°C and is explicitly stated in both the General Description and Electrical Characteristics sections of the datasheet.
What package type and footprint does MAX6383XR31D3+T use, and is it compatible with common alternatives?
MAX6383XR31D3+T uses the 3-pin SC70 package (outline number 21-0075, land pattern 90-0208). Its pinout - RESET (pin 1), VCC (pin 2), GND (pin 3) - matches the MAX809/MAX810 series, enabling direct PCB footprint compatibility. The datasheet confirms pin compatibility with those parts, making MAX6383XR31D3+T a functional upgrade with improved threshold accuracy and transient immunity.
How does the open-drain output of MAX6383XR31D3+T affect system-level reset bus design?
The open-drain RESET output of MAX6383XR31D3+T requires an external pullup resistor to the appropriate logic rail (e.g., 3.3V or 5V) and enables wired-OR connection with other open-drain reset sources on the same bus. This allows multiple supervisors (e.g., power supply monitors, watchdog timers) to share one reset line without contention. The datasheet specifies VOL ≤ 0.3V at ISINK = 1.2mA (VCC ≥ 2.5V), ensuring clean low-state assertion even under moderate bus capacitance.
MAX6383XR31D3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- 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
MAX6383XR31D3+T FAQ
1.How can I place an order for MAX6383XR31D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6383XR31D3+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 MAX6383XR31D3+T reliable?
The price and inventory of MAX6383XR31D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6383XR31D3+T is usually 5 days.
3.What payment methods are accepted for MAX6383XR31D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6383XR31D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6383XR31D3+T?
MAX6383XR31D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6383XR31D3+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 MAX6383XR31D3+T?
For technical support, including MAX6383XR31D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6383XR31D3+T requirements.
6.How does Aetrix verify that MAX6383XR31D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6383XR31D3+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 MAX6383XR31D3+T meets industry standards.
7.What is the process for return or replacement of MAX6383XR31D3+T?
All MAX6383XR31D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6383XR31D3+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 MAX6383XR31D3+T part is unused and in its original packaging.
Return procedure for MAX6383XR31D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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