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Analog Devices Inc./Maxim Integrated MAX6330SUR+T
- Part No.:
- MAX6330SUR+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6330SUR+T.pdf
- Description:
- IC VREF SHUNT 1.3% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,434
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Product details
Overview
The MAX6330SUR+T from Analog Devices is a precision shunt regulator with integrated active-low power-on reset function in a 3-pin SOT23-3 package. It provides ±1.5% shunt voltage regulation at 3.3V, 140ms reset timeout, and operates over -40°C to +85°C. Designed for microprocessor-based systems powered from high-voltage sources, it protects against power-up, power-down, and brownout faults in size-constrained applications.
For engineers reviewing the MAX6330SUR+T datasheet, MAX6330SUR+T pinout, MAX6330SUR+T application, or MAX6330SUR+T equivalent, key selection criteria include shunt voltage tolerance (±1.5%), reset threshold accuracy (3.01V to 3.15V), guaranteed reset assertion below 1.2V, SOT23-3 footprint compatibility, and transient immunity across 100µA–50mA shunt current range.
Technical Context
The MAX6330SUR+T integrates a precision bandgap-based shunt regulator and a dedicated reset generator with internal 140ms timeout timer. Its reset logic asserts active-low RESET when VSHUNT falls below 3.06V (typ) and holds low for ≥140ms after VSHUNT rises above threshold - no external capacitor required.
It functions as a two-terminal shunt device where regulation occurs via dynamic current sinking through the SHUNT pin, while RESET output interfaces directly to µP reset inputs. The device maintains stable operation across 100µA–50mA shunt current and exhibits 40ppm/°C tempco on both VSHUNT and reset threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Shunt Voltage | 3.3V ±1.5% (2.91V–3.40V over -40°C to +85°C); enables stable biasing of low-voltage µPs from higher VIN rails |
| Reset Threshold | 3.06V ±1.5% (2.97V–3.15V over -40°C to +85°C); ensures reliable reset initiation before system brownout |
| Reset Timeout | 140ms nominal; guarantees µP remains held in reset long enough for full power stabilization |
| Shunt Current Range | 100µA to 50mA; supports wide load variation without external compensation |
| Operating Temp | -40°C to +85°C; validated for industrial and consumer equipment environments |
| Package | SOT23-3; 2.92mm × 1.3mm footprint reduces PCB area vs discrete regulator + reset IC solutions |
| Reset Output Type | Active-low push/pull; sinks up to 3.2mA at 0.4V max VOL, compatible with standard µP reset inputs |
Pinout & Package
SOT23-3 package with gull-wing leads, 1.9mm pitch, 1.3mm body width, and thermal pad not present. RoHS-compliant lead-free construction (indicated by "+T" suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Common return path for shunt current and reset logic; must be low-impedance connection to system ground plane |
| 2 (RESET) | Active-low reset output | Asserts logic low during power-up/brownout; remains low ≥140ms after VSHUNT exceeds threshold; sinks 3.2mA max |
| 3 (SHUNT) | Regulated shunt voltage node | Provides precise 3.3V output; sinks all excess current from VIN via external RS resistor; connects to µP VCC and bypass capacitor CL |
Key Features
| Feature | Design Value |
|---|---|
| Integrated shunt + reset | Eliminates need for separate voltage reference and reset IC, reducing BOM count and layout complexity |
| No external timing components | 140ms reset timeout generated internally - no capacitor or resistor required for timing accuracy |
| High transient immunity | Stable operation under short-duration negative-going VSHUNT glitches due to internal noise filtering |
| Wide shunt current range | 100µA–50mA operation allows use with varying load currents without redesigning RS |
| Precision temperature stability | 40ppm/°C tempco on both VSHUNT and reset threshold ensures consistent behavior across operating range |
Applications
| Microcontroller Power Monitoring | Smart Appliance Control |
|---|---|
Use Scenario: Monitoring 3.3V supply rail in an embedded washing machine controller during AC line fluctuations. IC Role / Device Role / Timing Role: Shunt regulator maintains stable 3.3V for MCU core; RESET asserts during brownout to prevent corrupted EEPROM writes. Use Value: Prevents firmware corruption during 100ms–500ms line sags by holding MCU in reset until VSHUNT recovers and stabilizes for 140ms. | Use Scenario: Power supervision in compact IoT-enabled thermostat with battery backup and mains input. IC Role / Device Role / Timing Role: Regulates 3.3V rail from variable input; generates clean reset pulse on power restoration after deep discharge. Use Value: Enables reliable cold-start from 2.5V battery backup by asserting RESET until regulated 3.3V reaches valid threshold and times out. |
| Portable Medical Sensor Node | Industrial PLC I/O Module |
Use Scenario: Power management in handheld glucose meter using single-cell Li-ion with step-up converter. IC Role / Device Role / Timing Role: Provides precision 3.3V reference and reset signal to ARM Cortex-M0+ MCU during battery voltage droop. Use Value: Guarantees deterministic boot sequence even when battery drops to 3.0V, leveraging 3.06V reset threshold and 1.2V minimum valid RESET assertion. | Use Scenario: Supervising 3.3V logic supply in DIN-rail mounted I/O module exposed to 24VDC field wiring transients. IC Role / Device Role / Timing Role: Acts as fault-tolerant shunt regulator and reset source; withstands repetitive 100µs negative transients on VSHUNT. Use Value: Maintains system integrity during EFT bursts by sustaining regulation and issuing reset only on sustained undervoltage - not glitch-induced false triggers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt-regulator-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326SUR+T | Same SOT23-3 package, 3.3V shunt, but active-high RESET output; 1.25% reset threshold tolerance | Requires inverted logic handling at µP reset input; better suited for systems with active-high reset architecture | Select when µP requires active-high reset assertion and board layout cannot accommodate level-shifting circuitry |
| TLV809EC23DBVR | 3-pin SOT23, 3.3V reset IC only (no shunt regulation); 2.3V reset threshold; 200ms timeout; no shunt current capability | Must be paired with external shunt or LDO; lacks integrated voltage regulation functionality | Choose only if existing design already includes a precision shunt or LDO and only reset supervision is needed |
Compared with MAX6330SUR+T, MAX6326SUR+T offers tighter reset tolerance but requires active-high interface compatibility, while TLV809EC23DBVR provides longer timeout and lower quiescent current but adds system-level complexity by separating regulation and reset functions.
Availability
MAX6330SUR+T is available at Aetrix Electronics and suitable for microcontroller power monitoring, smart appliance control, portable medical sensor nodes, industrial PLC I/O modules, and critical µP power supervision requiring stable component supply across automotive-grade temperature ranges and long production lifecycles.
Supply support for MAX6330SUR+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, communications, automotive, and healthcare markets since 1965.
The MAX6330/MAX6331 family targets cost-sensitive, space-constrained µP supervisory applications requiring combined precision shunt regulation and deterministic reset timing - especially where high-voltage input rails and transient immunity are critical.
FAQ
What is the exact shunt voltage and tolerance for MAX6330SUR+T?
The MAX6330SUR+T provides a nominal shunt voltage of 3.3V with ±1.5% tolerance, meaning the actual regulation voltage falls between 2.91V and 3.40V over the full -40°C to +85°C operating temperature range. This value is confirmed in the Electrical Characteristics table for the "T" suffix variant (MAX633_T), and applies specifically to the MAX6330SUR+T part number.
Does MAX6330SUR+T require external components to generate its reset timeout?
No, the MAX6330SUR+T does not require external capacitors or resistors to set its reset timeout period. It features an internal timer that guarantees a nominal 140ms reset pulse width after VSHUNT rises above the threshold - a key differentiator from discrete reset ICs. This is explicitly stated in the Features section and verified in the Electrical Characteristics table under "Reset Pulse Width".
What is the minimum shunt current required for MAX6330SUR+T to regulate properly?
The MAX6330SUR+T requires a minimum shunt current of 100µA to maintain regulation, as specified in the Electrical Characteristics table under "Minimum Shunt Current (Note 2)". Below this current, the device cannot sustain stable 3.3V output, and VSHUNT will drop - potentially triggering premature reset assertion. This value is measured across the full temperature range.
Can MAX6330SUR+T drive a standard microprocessor reset input directly?
Yes, the MAX6330SUR+T can drive most standard microprocessor reset inputs directly. Its active-low RESET output sinks up to 3.2mA while maintaining ≤0.4V at the pin (VOL), meeting typical µP reset low-level requirements. The datasheet confirms compatibility with common µP reset architectures, including those requiring 3.2mA sink capability at 0.4V max.
What is the maximum allowable shunt current for MAX6330SUR+T?
The maximum shunt current for MAX6330SUR+T is 50mA, as specified in the Electrical Characteristics table under "Maximum Shunt Current (Note 3)". Exceeding this current risks exceeding the device's 320mW power dissipation limit in SOT23-3 packaging, especially at elevated ambient temperatures - potentially causing thermal shutdown or parametric shift.
MAX6330SUR+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 50 mA
- Tolerance:
- ±1.3%
- Temperature Coefficient:
- 40ppm/°C Typical
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 60 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6330SUR+T FAQ
1.How can I place an order for MAX6330SUR+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6330SUR+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 MAX6330SUR+T reliable?
The price and inventory of MAX6330SUR+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6330SUR+T is usually 5 days.
3.What payment methods are accepted for MAX6330SUR+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6330SUR+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6330SUR+T?
MAX6330SUR+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6330SUR+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 MAX6330SUR+T?
For technical support, including MAX6330SUR+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6330SUR+T requirements.
6.How does Aetrix verify that MAX6330SUR+T is sourced from the original manufacturer or authorized distributors?
All MAX6330SUR+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 MAX6330SUR+T meets industry standards.
7.What is the process for return or replacement of MAX6330SUR+T?
All MAX6330SUR+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6330SUR+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 MAX6330SUR+T part is unused and in its original packaging.
Return procedure for MAX6330SUR+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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