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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:4,718
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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), 140ms minimum reset timeout, and 3μA supply current at +1.8V. It monitors single VCC rail in battery-powered embedded systems where reliable power-on reset and brownout protection are critical.
For engineers reviewing the MAX6383XR31D3-T datasheet, MAX6383XR31D3-T pinout, MAX6383XR31D3-T application, or MAX6383XR31D3-T equivalent, key selection factors include its open-drain output requiring external pullup, guaranteed valid reset state down to VCC = 1V, ±2.5% threshold accuracy across automotive temperature range, and compatibility with space-constrained SC70-3 packaging.
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 sinks up to 3.2mA at VCC ≥ 4.5V with VOL ≤ 0.4V.
No manual reset input (MR) or auxiliary RESET IN is present - this variant is optimized for simple single-rail monitoring without user-initiated reset or dual-voltage supervision. It operates from 1.0V to 5.5V supply and guarantees correct logic state down to VCC = 1V.
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 |
| Reset Timeout | 140ms minimum - provides sufficient hold time for μP initialization before release |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Voltage | 1.0V to 5.5V - supports valid reset assertion even during deep brownout conditions |
| Output Type | Open-drain active-low - allows wired-OR configuration and level translation with external pullup |
| Reset Output Sink | 3.2mA at VCC ≥ 4.5V, VOL ≤ 0.4V - drives standard CMOS/TTL inputs directly |
| Package | 3-pin SC70 - footprint compatible with MAX809/MAX810, ideal for ultra-compact PCBs |
Pinout & Package
MAX6383XR31D3-T is housed in a 3-pin SC70 package (outline 21-0075, land pattern 90-0208), measuring 2.0mm × 2.1mm × 0.95mm, RoHS-compliant and lead-free.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (open-drain) | Active-low reset signal output; requires external pullup resistor; sinks current when asserted |
| 2 | VCC | Primary power supply input and monitored voltage rail; powers internal circuitry and comparator |
| 3 | GND | Analog and digital ground reference; must be connected to system ground plane for accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.08V with ±2.5% tolerance over full -40°C to +125°C range - eliminates external resistor network calibration |
| Ultra-low quiescent current | 3μA at +1.8V - extends battery life in portable medical and sensor nodes |
| Valid reset down to VCC = 1V | Guaranteed logic state integrity during severe brownout - prevents spurious release before system stabilization |
| Negative-going transient immunity | Rejects short VCC glitches (e.g., <1µs at 100mV overdrive) - avoids false resets in noisy power environments |
| SC70-3 footprint compatibility | Pins match MAX809/MAX810 - enables drop-in replacement without PCB redesign |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG patch powered by CR2032 coin cell with 1.8V–3.3V operating range. IC Role / Device Role / Timing Role: Monitors VCC rail and asserts open-drain RESET to ARM Cortex-M0+ MCU until stable 3.0V is reached post-power-up. Use Value: 3μA supply current extends battery life beyond 3 years; 140ms timeout ensures complete ADC initialization before firmware execution. |
Use Scenario: DIN-rail mounted analog input module with isolated 3.3V logic supply derived from 24V DC bus. IC Role / Device Role / Timing Role: Supervises 3.3V logic rail and holds microcontroller in reset during 24V bus transients or undervoltage events. Use Value: ±2.5% threshold accuracy over -40°C to +125°C prevents false resets in uncontrolled cabinet environments; open-drain output interfaces cleanly with optocoupled reset lines. |
| Automotive Body Control Units | Smart Energy Meters |
Use Scenario: 12V-to-3.3V converted subsystem in door module, exposed to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: Detects brownout on 3.3V domain and forces reset to prevent EEPROM corruption during voltage sag. Use Value: Valid reset assertion down to VCC = 1V ensures robust behavior during cold-crank (battery dips to ~6V, LDO output may sag below 2V); AEC-Q100 qualified variants available. |
Use Scenario: Dual-supply meter with backup supercapacitor maintaining 1.8V RTC and memory during main AC loss. IC Role / Device Role / Timing Role: Monitors primary 3.3V rail and triggers controlled shutdown sequence via open-drain RESET to meter SoC. Use Value: 140ms timeout aligns with supercapacitor hold-up time; 3.08V threshold precisely matches 3.3V LDO dropout margin, avoiding premature reset assertion. |
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, 3.08V threshold, but push-pull active-low output and 140ms timeout; higher ICC (15μA typ at 3.6V) | Lacks open-drain flexibility; cannot share reset bus with other devices | Select when board already uses push-pull reset and no level translation is needed |
| TPS3808G30DBVR | 3.0V threshold (±0.5%), 200ms timeout, SOT-23-5 package; includes manual reset input and tighter accuracy | Requires PCB layout change (5-pin vs 3-pin); adds MR functionality not present in MAX6383XR31D3-T | Select when higher threshold accuracy or manual reset capability is required despite larger footprint |
Compared with MAX809TRD3-T, MAX6383XR31D3-T offers lower power and open-drain flexibility at the cost of slightly relaxed accuracy; compared with TPS3808G30DBVR, it trades MR functionality and tighter spec for minimal footprint and ultra-low ICC - making it optimal for area- and power-constrained single-rail monitoring.
Availability
MAX6383XR31D3-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart energy meters requiring stable component supply with long-term lifecycle support.
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, emphasizing reliability, low power, and small form factor.
The MAX6381–MAX6390 family delivers single/dual low-voltage supervisory circuits targeting battery-powered and automotive systems where guaranteed reset behavior under brownout and transient conditions is essential.
FAQ
What is the exact reset threshold voltage of MAX6383XR31D3-T and how stable is it over 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 stability is achieved through laser-trimmed internal references and BiCMOS process design, ensuring consistent trip points in automotive and industrial environments without external calibration.
Does MAX6383XR31D3-T include a manual reset input (MR) or auxiliary voltage monitor (RESET IN)?
No, MAX6383XR31D3-T does not include a manual reset input or auxiliary RESET IN pin. It is a dedicated single-rail supervisor with only VCC, GND, and open-drain RESET pins. The MR and RESET IN features are present only in other members of the MAX6381–MAX6390 family such as MAX6384 or MAX6387 - not in the MAX6383 variant.
What is the minimum supply voltage at which MAX6383XR31D3-T guarantees correct reset output behavior?
MAX6383XR31D3-T guarantees valid reset output logic state down to VCC = 1.0V. Below this voltage, the internal comparator and timer may not operate reliably. This feature ensures robust reset assertion during deep brownout conditions common in battery-depleted or cold-crank scenarios, unlike many supervisors that fail below 1.8V.
Can MAX6383XR31D3-T be used in a wired-OR reset bus configuration?
Yes, MAX6383XR31D3-T's open-drain active-low RESET output is specifically designed for wired-OR configurations. Multiple MAX6383XR31D3-T devices (or other open-drain reset ICs) can share a common reset line with a single external pullup resistor, enabling system-level reset arbitration - a capability not supported by push-pull output variants.
Is MAX6383XR31D3-T pin-compatible with legacy reset ICs like MAX809?
Yes, MAX6383XR31D3-T uses the same 3-pin SC70 package and identical pinout (VCC, GND, RESET) as MAX809/MAX810 series devices. This allows direct PCB-level replacement without layout changes, though designers must verify that the open-drain output (vs. push-pull in MAX809) meets system-level interface requirements.
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:
- Obsolete
- 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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