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Analog Devices Inc./Maxim Integrated MAX6383XR31D2+T
- Part No.:
- MAX6383XR31D2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6383XR31D2+T.pdf
- Description:
- IC MPU/RESET CIRC 3.10V SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,495
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Product details
Overview
MAX6383XR31D2+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), 20ms minimum reset timeout, and 3μA supply current at +1.8V. It monitors single power rail VCC in battery-powered systems and ensures reliable μP initialization during brownout or power-up.
For engineers reviewing the MAX6383XR31D2+T datasheet, MAX6383XR31D2+T pinout, MAX6383XR31D2+T application, or MAX6383XR31D2+T 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 MAX6383XR31D2+T implements a precision bandgap-based voltage comparator monitoring VCC against a fixed 3.08V threshold, with internal timer enforcing a 20ms minimum reset assertion after VCC recovery. Its open-drain RESET output requires an external pullup resistor and supports wired-OR configurations.
No manual reset input (MR) or auxiliary RESET IN pin is present - this variant is optimized for single-rail monitoring without user-initiated reset or dual-voltage supervision, distinguishing it from MAX6384–MAX6390 and MAX6387–MAX6389 family members.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V (nominal), ±2.5% over –40°C to +125°C - ensures robust trip point across automotive and industrial environments |
| Reset Timeout | 20ms (minimum) - guarantees sufficient μP hold time for stable clock and memory initialization | Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout down to 1V VCC |
| Output Type | Open-drain active-low RESET - allows level translation and bus sharing with other open-drain devices |
| Package | 3-pin SC70 (X3+2 outline) - 1.25mm × 0.85mm footprint ideal for space-constrained portable designs |
| Temperature Range | –40°C to +125°C - qualified for under-hood automotive and industrial control applications |
Pinout & Package
MAX6383XR31D2+T uses a 3-pin SC70 package (outline 21-0075, land pattern 90-0208) with exposed pad not electrically connected. Pin 1 = RESET (open-drain active-low), Pin 2 = VCC, Pin 3 = GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Open-drain active-low reset output | Must be pulled up externally; sinks ≥80µA at VCC ≥1.0V to assert reset; leakage <1.0µA when deasserted |
| 2 - VCC | Power supply input and monitored voltage rail | Supplies internal circuitry and serves as sole reset trigger source; absolute max = +6.0V |
| 3 - GND | Ground reference | Common return path for all internal functions and RESET sink current |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.08V with ±2.5% tolerance over full temperature range - eliminates need for external resistor divider calibration |
| Ultra-low quiescent current | 3μA at 1.8V - extends battery life in always-on monitoring nodes without compromising reset responsiveness |
| Valid reset output down to VCC = 1V | Guaranteed logic state integrity during deep undervoltage - prevents spurious release before power stabilization |
| Negative-going VCC transient immunity | Rejects sub-10µs glitches below threshold - avoids false resets in electrically noisy environments (e.g., motor drives) |
| RoHS-compliant SC70-3 package | Lead-free +T suffix; 1.25mm × 0.85mm footprint - meets IPC-7351B standards for automated assembly |
Applications
| Portable Medical Sensors | Battery-Powered Telematics |
|---|---|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell, requiring fail-safe boot sequence on cold start. IC Role / Device Role / Timing Role: Supervises VCC rail to prevent firmware execution before LDO output stabilizes; asserts open-drain RESET until 20ms after 3.08V threshold is crossed. Use Value: 3μA supply current enables >5-year shelf life; ±2.5% threshold accuracy ensures consistent trip point across body-temperature variations. | Use Scenario: OBD-II dongle operating from vehicle battery (9V–16V) with step-down converter feeding 3.3V MCU rail. IC Role / Device Role / Timing Role: Monitors 3.3V rail only; open-drain RESET interfaces directly with MCU's active-low nRST pin and shares pullup with CAN transceiver reset line. Use Value: SC70-3 footprint saves PCB area vs. SOT-23; 20ms timeout matches typical ARM Cortex-M boot loader initialization window. |
| Industrial PLC I/O Modules | Smart Energy Meters |
Use Scenario: DIN-rail mounted I/O module with isolated 5V DC-DC supplying microcontroller and analog front-end. IC Role / Device Role / Timing Role: Single-point VCC supervision of 5V rail; RESET signal held low during brownout events lasting <20ms to prevent partial register writes. Use Value: –40°C to +125°C rating ensures reliability in unventilated enclosures; open-drain output tolerates 6V pullup for compatibility with legacy 5V logic. | Use Scenario: Revenue-grade electricity meter with real-time clock and metrology ASIC powered from supercapacitor backup during AC outage. IC Role / Device Role / Timing Role: Monitors 3.3V backup rail; asserts RESET if supercap voltage drops below 3.08V, forcing safe shutdown before RTC corruption. Use Value: Valid reset assertion down to VCC = 1V prevents premature release during capacitor discharge tail; 3.08V threshold aligns with supercap end-of-life voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6381XR31D2+T | Same 3.08V threshold, 20ms timeout, and SC70-3 package; push-pull active-low RESET instead of open-drain | Requires dedicated MCU reset pin; cannot share pullup with other devices | Select when board layout lacks space for external pullup or when driving capacitive loads >50pF |
| TLV803EB30DBZR | 3.0V threshold (±1%), 200ms timeout, SOT-23-3 package; 0.5μA supply current at 1.8V | Longer timeout limits use in fast-boot systems; lower IQ benefits ultra-low-power sleep modes | Select when extended reset hold time is acceptable and sub-1μA quiescent current is critical |
Compared with MAX6381XR31D2+T, MAX6383XR31D2+T provides bus-sharing capability via open-drain output but requires external pullup; compared with TLV803EB30DBZR, it offers tighter timing control (20ms vs. 200ms) and broader temperature validation (–40°C to +125°C vs. –40°C to +125°C with reduced IQ spec).
Availability
MAX6383XR31D2+T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered telematics, industrial PLC I/O modules, and smart energy meters requiring stable component supply across automotive and industrial temperature ranges.
Supply support for MAX6383XR31D2+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 power, sensing, and interface applications in automotive, industrial, and communications markets.
The MAX6381–MAX6390 family delivers low-power, high-accuracy μP reset supervision with multiple output types and timing options, targeting space- and power-constrained embedded systems requiring guaranteed startup integrity.
FAQ
What is the exact reset threshold voltage of MAX6383XR31D2+T and how accurate is it over temperature?
The MAX6383XR31D2+T has a nominal reset threshold of 3.08V, with guaranteed accuracy of ±2.5% over the full operating temperature range of –40°C to +125°C. This specification is validated per the datasheet's Electrical Characteristics table and applies to all units shipped with the "31" suffix, which corresponds to the 3.00V–3.15V threshold band.
Does MAX6383XR31D2+T include a manual reset input (MR) pin?
No, MAX6383XR31D2+T does not include a manual reset input. The MR function is only present on MAX6384–MAX6386 and MAX6390 variants. MAX6383XR31D2+T is a dedicated single-rail supervisor with RESET, VCC, and GND pins only - confirmed by its 3-pin SC70 pinout and Selector Guide matrix.
What package type and dimensions does MAX6383XR31D2+T use?
MAX6383XR31D2+T uses a 3-pin SC70 package (outline number 21-0075, land pattern 90-0208), measuring 1.25mm × 0.85mm with 0.65mm pitch. The "+T" suffix confirms RoHS-compliant, lead-free construction. This package is distinct from the 4-pin SC70 and 6-pin μDFN options used by other members of the MAX6381–MAX6390 family.
Can MAX6383XR31D2+T operate reliably below 1.8V supply voltage?
Yes, MAX6383XR31D2+T operates from 1.0V to 5.5V and guarantees valid reset output behavior down to VCC = 1.0V. Its reset comparator remains functional and the open-drain RESET output maintains specified VOL and leakage performance even at 1.0V, enabling use in ultra-low-voltage brownout detection scenarios.
Is MAX6383XR31D2+T pin-compatible with older Maxim reset ICs like MAX809?
MAX6383XR31D2+T is not pin-compatible with MAX809 due to differing pin counts and functions: MAX809 uses SOT-23-3 with push-pull output, while MAX6383XR31D2+T uses SC70-3 with open-drain output. However, the datasheet states pin compatibility with MAX809/MAX810/MAX803 *in function and footprint class*, not mechanical pin-for-pin equivalence - MAX6383XR31D2+T requires layout adaptation for open-drain pullup routing.
MAX6383XR31D2+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:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6383XR31D2+T FAQ
1.How can I place an order for MAX6383XR31D2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6383XR31D2+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 MAX6383XR31D2+T reliable?
The price and inventory of MAX6383XR31D2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6383XR31D2+T is usually 5 days.
3.What payment methods are accepted for MAX6383XR31D2+T?
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4.How is shipping managed for MAX6383XR31D2+T?
MAX6383XR31D2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6383XR31D2+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 MAX6383XR31D2+T?
For technical support, including MAX6383XR31D2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6383XR31D2+T requirements.
6.How does Aetrix verify that MAX6383XR31D2+T is sourced from the original manufacturer or authorized distributors?
All MAX6383XR31D2+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 MAX6383XR31D2+T meets industry standards.
7.What is the process for return or replacement of MAX6383XR31D2+T?
All MAX6383XR31D2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6383XR31D2+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 MAX6383XR31D2+T part is unused and in its original packaging.
Return procedure for MAX6383XR31D2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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